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Re:New two-stroke engine design could help keep internal com... by leoedin on Tuesday May 26, 2020 @04:42AM (#23308711)
Even with the increased electrification of transport, there's still a very strong case for liquid fuel - it just offers an energy density so much higher than batteries, especially in off-grid or remote situations.

Electric drivetrains open up an interesting potential for range-extenders which charge the batteries. The constraints are different than conventional engines - lower peak power, more-or-less continuous power output operation, no sudden torque changes. Different constraints generally mean a different optimal solution.

Re:New two-stroke engine design could help keep internal com... by Brakenshire on Tuesday May 26, 2020 @07:14AM (#23309654)
I’m surprised there hasn’t been more development of engines optimized as range extenders. That seemed like an obvious next step from the Prius, for example.

But I think the peak of that opportunity has passed. The market in Europe and China is going to flip to pure electric in 5-8 years, with the US 5 years later. The window for developing new models that fit into that transition is shrinking. There will be long term demand for range extended vehicles, still in 15 or 20 years, but it will be niche.

Re:New two-stroke engine design could help keep internal com... by ChuckNorris89 on Tuesday May 26, 2020 @07:41AM (#23309854)
>The market in Europe and China is going to flip to pure electric in 5-8 years

That's way too optimistic for Europe. Maybe with the exception of Norway and Europe's largest metros like London, most of Europe will stay on ICE for a long time.

The price of electric cars here is too high for most incomes and the cheaper ones have too little range compared to ICEs. Not to mention the charging infrastructure is still lacking.

Right now they're still toys for the rich man with a house and not tools for the average joe.

I'd rather we invest the money in public transport and cycling infrastructure to rid the cities of cars but unfortunately the auto industry lobbies too strong in Europe for that to happen.

Re:New two-stroke engine design could help keep internal com... by gambiting on Tuesday May 26, 2020 @10:26AM (#23311537)
Still no one can answer the question of where do you charge one if you rent an apartment with no parking or a terraced house with no driveway. Don't get me wrong, I'm planning to go 100% electric in the next few years, but then we're lucky enough to have a house with a double driveway - I have no idea how it can possibly work for people without dedicated parking.
Re:New two-stroke engine design could help keep internal com... by exhilaration on Tuesday May 26, 2020 @11:04AM (#23312044)
You'll need cities to do large scale deployments of streetlight chargers like these: https://electrek.co/2019/11/13/la-adds-hundreds-of-ev-charge...

I don't know if it'll require upgrades to the power grid. You've already got 240v in Europe, so that's only ~10 hours to charge a Tesla. But could it handle thousands of EVs charging simultaneously?

If there's any place in the world that can do this it's Europe.

Re:New two-stroke engine design could help keep internal com... by gambiting on Tuesday May 26, 2020 @11:16AM (#23312186)
I still don't think that this will be anywhere enough. This is a street I used to live on: https://www.google.pl/maps/@54.9941128,-1.6077652,3a,75y,286...

From top to bottom, it would fit about 40 cars - but there's only 6-8 street lamps? Ok, so maybe the council could fit a new charging post every 10 metres or so - but then the question is, with what money? There's hardly any cash to keep maintaining the roads at all, where would they find the money to dig up every single street in the city and put in charging posts? Even if they are paid, you'd wait a very long time to make your money back, and then there's another issue I have - at home, I can charge my car at about £0.12/kWh during the day and £0.05/kWh during the night. But public charging points I can see around at crazy expensive - like £0.30-£0.40 per kWh. At that point, it's literally cheaper to drive a good diesel.

Re:New two-stroke engine design could help keep internal com... by AnthonyMouse on Tuesday May 26, 2020 @01:16PM (#23313774)
The key to this is you don't build too many of them.

The wires aren't the problem; you've already got a power grid carrying kilovolts along the same streets to power the buildings. The cost is the charging ports. So start with one, reserve the space for EVs and make it expensive.

Then people won't want to use it. Most of the time they'll charge at work or some restaurant that installed a charging port to drive customers to its business. Which is why you only have to start with one -- the first one on the street is just for emergencies. You might have ten EVs in the area and one charging port because at any given time only one person is willing to pay that much to use it. Which also means that it's regularly in use and can recover its costs quickly. But then it's there if you really need it, so more people can feel comfortable buying EVs.

Then once there are more EVs, you can install more charging ports -- they're paying for themselves, after all, as long as you don't install so many they don't stay in use.

Then once you've paid off the capital cost you can lower the price, so more people use them, so you can build even more. When you have 10 charging ports but 9 are already paid off, you only have to charge 10% of the original premium to pay off the 10th. So in the long term you still end up with plenty of charging ports on the street at only a slightly higher price than they are in other places.

Re:New two-stroke engine design could help keep internal com... by petre on Wednesday May 27, 2020 @02:37AM (#23320046)
The best thing would be to make them expensive when the vehicle is >70% charged so it incentivizes drivers to free the charger equipped parking spot when the vehicles is full of almost full. That way the charger becomes available to others.
Re:New two-stroke engine design could help keep internal com... by ChuckNorris89 on Tuesday May 26, 2020 @12:06PM (#23312885)
1000x this! People never stop to ask themselves who will pay for the infrastructure needed to upgrade the existing public electrical networks in our cities to support everyone charging their EVs on the street.

Lots of European cities are broke at this point and have much bigger problems to fix right now than EV charging stations and if private companies would install them across the cities, the charging costs would be high enough to make EVs ownership unappealing.

Add the fact that EVs here are more expensive than in the US and you have the reason why most EVs right now are only owned by upper class people who can afford to have their own private charging station on their own property.

There's a reason diesel ICEs, as dirty as they are, are still so popular in Europe. They're cheap to run.

Ironically, as green as it may be, Europe will fall behind China and the US at mass EV adoption.

Unless they'd be given away for free, expecting EVs to take over the market here in 5 to 8 years is dreaming at best.

Re:New two-stroke engine design could help keep internal com... by petre on Wednesday May 27, 2020 @02:54AM (#23320130)
Western Europe will do it as means to incentivize auto sales after the pandemic. Car sales fell 80% in Europe. President Macron has already announced such a plan yesterday. This includes infrastructure:

"The number of battery charge-points will be tripled to 100,000 by the end of next year."

https://www.bbc.com/news/business-52814074

Re:New two-stroke engine design could help keep internal com... by xyzzyz on Tuesday May 26, 2020 @01:16PM (#23313772)
Lots of European cities are broke at this point and have much bigger problems to fix right now than EV charging stations and if private companies would install them across the cities, the charging costs would be high enough to make EVs ownership unappealing.

These European city planners should have listened to Strongtowns and other New Urbanists, and instead of encouraging suburban development style which makes prohibitively expensive for cities to maintain streets, instead followed the dense urban pattern of American cities.

Re:New two-stroke engine design could help keep internal com... by jaclaz on Tuesday May 26, 2020 @12:52PM (#23313440)
>I don't know if it'll require upgrades to the power grid. You've already got 240v in Europe, so that's only ~10 hours to charge a Tesla. But could it handle thousands of EVs charging simultaneously?

Rest assured it will, and not only on the power grid.

Back of the envelope calculation.

A modern lamp post (one every 30 mt or so) is (led based) 60-80-100W, if infrastructure (cables) are not so recent, previous generation of street lightning were 150-250W per post.

Cables are dimensioned accurately to carry that kind of current/power.

A charging every 30 mt needs to serve 6-7 cars, we are talking of 7-10KW, i.e. 7000-10000 W, something like 40 times the power the infrastructure was designed for.

And each 300 mt stretch of street will need something in the order of magnitude of 70-100KW, and since all cars will be charged at night, there are very little to be spared for non-contemporaneus power usage.

Re:New two-stroke engine design could help keep internal com... by nucleardog on Tuesday May 26, 2020 @01:36PM (#23314062)
Our city had to ban cords running across the sidewalk after too many slip and fall incidents.

In areas where the street lights are set onto the property side of the sidewalk (or even into lawns) rather than on the sidewalk abutting the street (most NA residential areas I think) I don't see this idea gaining a lot of traction. Or at least not remaining for long past the sidewalk turning into an obstacle course for the elderly and others with limited movement.

Re:New two-stroke engine design could help keep internal com... by AnthonyMouse on Tuesday May 26, 2020 @12:58PM (#23313516)
> Still no one can answer the question of where do you charge one if you rent an apartment with no parking or a terraced house with no driveway.

The first customers are people who can install a charging port where they normally park their car. That's probably more than half of car owners, and gets you to at least a double digit percentage of cars as electric.

At that point there are enough electric cars that a charger starts getting installed anywhere there's a lot of parking. Then more people can buy EVs, and do, so more chargers get installed. By the time most cars are electric they'll be everywhere.

Re:New two-stroke engine design could help keep internal com... by jccooper on Tuesday May 26, 2020 @11:34AM (#23312419)
Charging at home or at work is best with electrics, but the gas station model is still possible. With a range of 500-600km and high power charging at 1000-1500kph, which is all being done right now, you can go somewhere and charge once or twice a week. It's not quite as convenient at 20-30 minutes, but it's possible; when combined with some sort of destination, like a grocery store, it's more time-efficient.
Re:New two-stroke engine design could help keep internal com... by gambiting on Tuesday May 26, 2020 @12:34PM (#23313218)
Yes, except that as I pointed out in my other comment - public stations around me charge about £0.30-£0.40 per kWh(and I know that rapid stations near motorways charge even more) - at that price, it's literally cheaper to drive a diesel. Yes, we can make an argument that once people have no choice, they will pay that money to charge anyway. But privately-owned infrastructure has no reason to be free or cheap, except for the very initial period when say shopping centres are trying to attract EV drivers. Once they are essential infrastructure it's hard to see them being cheap.
Re:New two-stroke engine design could help keep internal com... by xyzzyz on Tuesday May 26, 2020 @01:27PM (#23313945)
Privately owned infrastructure has good reason to be cheap, that is, competition from of their privately owned businesses. Food distribution network is much more essential than EV charging, and yet food is now cheaper than ever. What matters is not how essential something is, but rather at what cost the service can be provided. If a charging station can expect many customers use it, which will quickly amortize the capital costs of construction, you’ll see charging prices at those stations go not much higher than the operational costs. Otherwise, if the prices are high, this incentivizes new businesses to enter the market and undercut existing producers.

Lots of essential infrastructure is cheap because of competition, like for example electricity generation. There is no reason to believe EV charging will be different.

Of course, it might also turn out that while electricity costs are low, other costs of running charging business are high. If that’s the case, that doesn’t bode well for EV adoption in among people who don’t live in houses.

Re:New two-stroke engine design could help keep internal com... by pmontra on Tuesday May 26, 2020 @02:32PM (#23314761)
> Privately owned infrastructure has good reason to be cheap, that is, competition from of their privately owned businesses

I've been reading HN for years and people from the USA keep writing that this didn't happen there for fiber and other telecommunication service. Is it going to happen for EV chargers?

Re:New two-stroke engine design could help keep internal com... by xyzzyz on Tuesday May 26, 2020 @02:48PM (#23314969)
US actually has pretty good fiber penetration and internet speeds now (it used to be quite a bit worse a few years ago). The biggest difference between fiber and EV chargers however is that fiber only makes economic sense if you have extensive network, while EV charges can be installed locally by smaller entities. Additionally, installing electric equipment is easier than digging up whole towns, because you don’t need as much political buy-in, less permitting is necessary etc.
Re:New two-stroke engine design could help keep internal com... by gambiting on Tuesday May 26, 2020 @01:46PM (#23314178)
>>There is no reason to believe EV charging will be different.

This is exactly what I'm saying though - motorway petrol stations are insanely expensive, because they have no competition - a company wins a contract to run the only petrol station on a given stretch of the A1, so they can charge obscene prices for petrol. Same is already happening with electricity - some providers along motorways charge an insane £0.69 per kWh, it would be cheaper to fill up another car with premium unleaded and use it to charge the electric car at that point.

Re:New two-stroke engine design could help keep internal com... by AnthonyMouse on Tuesday May 26, 2020 @01:27PM (#23313929)
Why would you you expect shopping centers to stop wanting to attract EV drivers? It's practically their dream to have everybody wandering around in the mall for an hour or more with nothing better to do than buy stuff because they're waiting for their car to charge.
Re:New two-stroke engine design could help keep internal com... by Hypx on Wednesday May 27, 2020 @03:11AM (#23320248)
Still surprising how members of this website are still mostly blind to the obviousness of fuel cell cars. Just turn that excess electricity from renewables and convert it to hydrogen, powering a fleet of hydrogen powered vehicles. Solves all infrastructure issues being brought up. Furthermore, it's possible to power large vehicles like semi-trucks or ships, even aircraft at some point in the future.
Re:New two-stroke engine design could help keep internal com... by gambiting on Wednesday May 27, 2020 @03:54AM (#23320535)
On the other hand, I'm constantly surprised how anyone anywhere still thinks that fuel cell cars are a good idea.

There is zero elemental hydrogen on Earth. 99% of the one we use is a byproduct of fossil fuel industry. Yes, you can produce it from electrolysis, but not only the hydrogen produced this way will never "break even" it's actually much worse than "even" since you then need to spend a whole load of energy to compress it and bottle it. Why not...just put the electricity into the existing grid and charge automotive batteries directly? After all, fuel cell cars are electric cars, direct combustion of hydrogen was experimental and extremely inefficient.

That brings me to my next point - hydrogen has the smallest molecule of all, which means that it evaporates naturally through any container you put it in. 70kg lead bottle only holds 1L of hydrogen, and it naturally loses all of it in 2-3 weeks. So no underground carparks, garages etc because of the explosion risks.

But finally - there is no infrastructure for hydrogen. It's like trying to build a network of petrol stations....from scratch.

And batteries are definitely good enough to power larger trucks, it's just the cost that's prohibitive(enough cells for a large semi would cost many times more than the truck itself).

Re:New two-stroke engine design could help keep internal com... by Hypx on Wednesday May 27, 2020 @05:03AM (#23320970)
I must inform you that you're mostly spreading ignorance or obsolete information with claims like those. Most of the claims you're making are either wrong or many years out of date.

> There is zero elemental hydrogen on Earth.

Not actually true. As I understand it, reserves of natural hydrogen do exist underground, similar to how helium is sometimes trapped underground in certain formations. These could potentially be huge source of hydrogen, although right now it's just speculation.

> Yes, you can produce it from electrolysis, but not only the hydrogen produced this way will never "break even" it's actually much worse than "even" since you then need to spend a whole load of energy to compress it and bottle it.

Since we live in a world of zero priced, and sometimes negatively priced renewable electricity, this is a non-issue. In fact, it's irrelevant. The biggest motivation for green hydrogen right now is the fact that we have far more green energy that we can use for large stretches of time on the grid. We're currently "curtailing" that electricity, which is a fancy word meaning that we're throwing it away. Turning what is in effect a waste product into a valuable new fuel is a big gain.

> Why not...just put the electricity into the existing grid and charge automotive batteries directly? After all, fuel cell cars are electric cars, direct combustion of hydrogen was experimental and extremely inefficient.

Largely because we can't match production with demand. As I mentioned above, we have huge surpluses during parts of the day, but also we have huge shortages at other times. Using hydrogen as a load balancer is an excellent idea right now. We can do this to a certain extent using batteries or pumped water, but we quickly run into the limits of these technologies. Hydrogen can be stored in far larger quantities than any battery in the form of underground salt caverns.

> That brings me to my next point - hydrogen has the smallest molecule of all, which means that it evaporates naturally through any container you put it in. 70kg lead bottle only holds 1L of hydrogen, and it naturally loses all of it in 2-3 weeks. So no underground carparks, garages etc because of the explosion risks.

Carbon fiber tanks have long since solved this problem. We know this since you can buy FCEVs right now, and they are perfectly fine vehicle with none of the above issues. Indeed, I've seen quite a few hydrogen skeptics review these cars, and while they maintain their skepticism of the idea of hydrogen, they seem to be at a loss at describing any kind of real shortcoming in the technology itself.

> But finally - there is no infrastructure for hydrogen. It's like trying to build a network of petrol stations....from scratch.

This is changing. There are now hundreds of hydrogen refuel stations around the world, and many more being built. This is particularly true in Asia, where governments in that region have sponsored huge hydrogen infrastructure buildouts.

> And batteries are definitely good enough to power larger trucks, it's just the cost that's prohibitive(enough cells for a large semi would cost many times more than the truck itself).

There many problems with battery powered semi-trucks. Cost is one of them, and weight is another big one. Furthermore, recharging them in a few minutes is a huge selling point, and batteries cannot deliver on that need. FCEVs are a much better answer for long-haul trucking than BEVs.

Re:New two-stroke engine design could help keep internal com... by mongol on Tuesday May 26, 2020 @10:41AM (#23311734)
One possibility is swappable batteries. So that there are places you drive, like a gas station, and a robot swaps the battery in a minute.
Re:New two-stroke engine design could help keep internal com... by gambiting on Tuesday May 26, 2020 @10:51AM (#23311876)
Sure, but this simply doesn't exist. It's Sci-Fi at this point. A lot of countries are planning a complete ban on petrol/diesel new cars within 10-20 years, yet there are no such signs of such systems(and I suspect there won't be, since every single manufacturer uses different batteries of different shapes and sizes, in some EVs the batteries are simply not removable without hours of work first). Doing this would require standardization, and seeing as we're still in the early innovation phase, that would practically be suicide for the tech.
Re:New two-stroke engine design could help keep internal com... by pmalynin on Tuesday May 26, 2020 @12:48PM (#23313390)
Tesla built some in California as a test bed
Re:New two-stroke engine design could help keep internal com... by RandallBrown on Tuesday May 26, 2020 @02:00PM (#23314371)
You charge at charging stations that are nearby where you live, just like people do with gas stations now.

You can charge while you get groceries (or a haircut, or dinner, or whatever) and then go on with your day. Certainly not as convenient as charging at home, but not impossible.

Re:New two-stroke engine design could help keep internal com... by Retric on Tuesday May 26, 2020 @08:24AM (#23310224)
Electric cars are going to become extremely compelling very soon. A 300 mile electric car is close to the same cost as an IC engine over it’s lifespan. But, where IC engines have a hundred years of development and economies of scale electric cars are getting significantly better very quickly.

Charge infrastructure is expanding rapidly due to current rates of adoption which further makes electric cars more appealing every year.

Re:New two-stroke engine design could help keep internal com... by Unklejoe on Tuesday May 26, 2020 @09:10AM (#23310664)
While electric cars will cost less over their lifespan (due to much less maintenance), they still cost a lot more initially, and I think that's the biggest hurdle right now.

A lot of people can't drop $40k on a car, but they can spend $25k up front and another $15k over the life of the car.

I think the major changeover will be when I can buy the equivalent of a Honda Accord, but fully electric, and for the same price.

The Tesla Model 3 was supposed to be that, but in reality, it still costs more.

Re:New two-stroke engine design could help keep internal com... by aianus on Tuesday May 26, 2020 @09:39AM (#23310949)
Very few people spend $25k up front for a car. They lease it or finance it over 60 or 72 months.

Unless you’re referring to the psychological sticker shock only and not the actual cash flow implications.

Re:New two-stroke engine design could help keep internal com... by gsnedders on Tuesday May 26, 2020 @09:51AM (#23311082)
And that ignores the fact that the majority of car sales are not new cars, so the average purchase price of a car is lower still. Even once the majority of new car sales are EVs, we still have a long way to go (with both energy generation and the long period before the majority of miles driven are in EVs).
Re:New two-stroke engine design could help keep internal com... by travisporter on Tuesday May 26, 2020 @09:52AM (#23311092)
Not really in the market for one, but in the US the 2019 Hyundai Ioniq (range of ~120 mi, so not ideal if you don't have a charger at home) is $99/mo with $1000 down for a 3 year lease, which is dirt cheap. I'm guessing after three years the battery will still be valuable, so they can be aggressively pricing it this way.

I think if Tesla had better leasing, you'd see way more of them

Re:New two-stroke engine design could help keep internal com... by gambiting on Tuesday May 26, 2020 @10:23AM (#23311494)
I have no idea how the price is so low in the US then, that's insane. We looked at the Ioniq for my wife last year and it was something like £3000 upfront and then £400 a month for 4 years - it's just a lot of money. For comparison, you could have a brand new VW Polo for £1000 upfront and £200 a month - and there's absolutely no way she could use £200 worth of fuel every month, even if petrol doubled in price.
Re:New two-stroke engine design could help keep internal com... by coredog64 on Tuesday May 26, 2020 @11:22AM (#23312271)
California has this concept of a “compliance car”. There’s a legal requirement to sell X electric cars, so the manufacturers practically give away small, cheap cars to enable their IC business.

Fiat-Chrysler did it with the 500e, and back in the day the big 3 did it with subsidized Cavaliers and Escorts.

Re:New two-stroke engine design could help keep internal com... by ChuckNorris89 on Tuesday May 26, 2020 @11:31AM (#23312382)
We need something like this in Europe but fat chance when the regulators are bought and paid by the auto industry which still prefers ICE cars.
Re:New two-stroke engine design could help keep internal com... by gambiting on Tuesday May 26, 2020 @12:42PM (#23313317)
What are you talking about? EU is tightening the screw on manufacturers so hard that they are literally panicking right now, as there is literally no way they can meet the regulations as is. Currently there is a requirement that fleet averages have to be below 100g/km for CO2, soon that falls down to 75g/km and then 50g/km - with every car sold above that threshold incurring heavy penalties. We're seeing literally every manufacturer rapidly moving towards hybrids and pure EVs, because there is no way to meet those targets otherwise - VW has completely axed all ICE versions of the Up(and their Skoda and Seat equivalents) going full electric, just to bring their averages down. Even Fiat, whose market was always low-end, cheapest of the cheap vehicles, axed ICE Fiat 500, and has gone full electric. Panda(!!!) is now a hybrid! Even Dacia, which is literally bottom-bin of cars, is introducing a hybrid and potentially a full EV soon.

All of this is only happening because of the pressure from EU regulators.

Re:New two-stroke engine design could help keep internal com... by xyzzyz on Tuesday May 26, 2020 @01:36PM (#23314075)
Currently there is a requirement that fleet averages have to be below 100g/km for CO2, soon that falls down to 75g/km and then 50g/km.

To see how these norms are effectively impossible to meet with ICEs, note that these translate to fuel efficiency of 4, 3, and 2 liters/100 km, or for American folks, 58, 78, and 117 mpg respectively.

Re:New two-stroke engine design could help keep internal com... by vvillena on Tuesday May 26, 2020 @01:57PM (#23314327)
Unfortunately, heavy cars are allowed higher limits, and that's part of the reason the automakers are pushing heavier cars like hybrid crossover SUVs.
Re:New two-stroke engine design could help keep internal com... by laurencerowe on Thursday May 28, 2020 @02:25PM (#23340591)
The advertised US price likely includes the $7500 federal electric car incentive (which goes to the leasing company) and may even include the $2000 California rebate (subject to income eligibility limits.) Sales tax (VAT) is also excluded from advertised prices in the US.
Re:New two-stroke engine design could help keep internal com... by dashundchen on Tuesday May 26, 2020 @10:07AM (#23311268)
I would imagine the upcoming release of the VW ID.3 is going to be a game changer in Europe.

€23.000 ID.3 vs €20.000 ICE Golf in Germany, from what I understand the Golf is one of the best selling cars in Europe. Also I believe many European countries exempt or greatly reduce emissions taxes on EVs, so that difference could probably be made up quickly.

Re:New two-stroke engine design could help keep internal com... by barking on Tuesday May 26, 2020 @10:55AM (#23311943)
One thing that always worries me about buying an electric car is the possibility that the rapid technological advances might destroy the resale value of existing models. That sounds like what this VW model might do.
Re:New two-stroke engine design could help keep internal com... by vardump on Tuesday May 26, 2020 @11:33AM (#23312406)
New EV models will soon also destroy resale value of ICE vehicles.
Re:New two-stroke engine design could help keep internal com... by Gibbon1 on Tuesday May 26, 2020 @04:43PM (#23316164)
Next gen electric cars are going to hammer the resale price of both ICE and current EV cars.

Might even be worse we're on the verge of the big global warming panic. At the same time the current pandemic has been showing that the world under a semi command economy is more resilient than neoliberals gaslighted everyone into believing. And thus governments have a lot more wiggle room than they thought. One might find that the resale value of your ICE car is zero.

Re:New two-stroke engine design could help keep internal com... by vardump on Tuesday May 26, 2020 @04:51PM (#23316238)
I don't think climate change related policies matter much in the big picture. Maybe it makes adoption a year or two faster.

EVs are better cars for the majority of people. Once drive out price unequivocally beats ICE, EV adoption will skyrocket.

Re:New two-stroke engine design could help keep internal com... by ogre_codes on Tuesday May 26, 2020 @12:32PM (#23313192)
The cost of electric cars goes down every year. We've gone from $100,000 for a useful/ good electric car to ~$30k (Chevy Bolt EV) in less than 15 years. We're already seeing pricing parity on higher electric cars and soon with the Cybertruck, lower end cars will come within the next 10 years or so.
Re:New two-stroke engine design could help keep internal com... by bluGill on Tuesday May 26, 2020 @09:31AM (#23310853)
Electric moyors and batteries have had more years of research. In fact the electric motor and battery were researched by scientists in the 1700s.
Re:New two-stroke engine design could help keep internal com... by Retric on Tuesday May 26, 2020 @10:34AM (#23311633)
An engines go back to at least the 1600’s with precursors all the way back into the first century AD. Except cars are really their own thing with their individual needs.

Electric cars are vastly more than just a battery and electric motor. Regenerative breaking, power distribution, heat management, possibly a simple transmission etc etc. The amount of innovation in this space dwarfs what’s happening in the IC space because the problems are so new.

Re:New two-stroke engine design could help keep internal com... by JoeAltmaier on Tuesday May 26, 2020 @10:36AM (#23311662)
Sort of. The core, kernel issue of fuel weight/kwh is still limiting electric.
Re:New two-stroke engine design could help keep internal com... by Retric on Tuesday May 26, 2020 @10:45AM (#23311787)
I don’t think weight is much of an issue at this point. EV Acceleration in normal driving is fine and their range keeps going up. The new Roadster for example is aiming for a 200kWh battery and still has crazy acceleration. Cost seems like a bigger deal, but economies of scale are driving that down quickly.

EV’s hit 2.5% of total sales in 2019. 2020 is likely going to be odd, but scaling production still seems to be the bottleneck.

Re:New two-stroke engine design could help keep internal com... by JoeAltmaier on Tuesday May 26, 2020 @10:49AM (#23311844)
1 gallon of gas is 33kwh. And can be 'recharged' into a vehicle in 10 seconds.

So sure the Roadster can hold what, 6 gallons? Like an econo-box. And weighs 2 1/2 - 3 tons. Much of that in battery.

Yes, weight is still the big issue.

Re:New two-stroke engine design could help keep internal com... by Retric on Tuesday May 26, 2020 @10:53AM (#23311908)
An EC engine is a long way from 100% efficient. Model 3 Long Range is 310 mile range on a 75kWh battery. Cars are not hitting 310 miles on 2.3 gallons of fuel.

For the most extreme comparison, a Bugatti Chiron gets an EPA 11 MPG so the roadster is arguably the equivalent of a 56 gallon fuel tank where the Chiron is stuck with 26 gallons.

PS: A better comparison would be a similar ~200,000$ two seater but none of them are optimized for fuel efficiency.

Re:New two-stroke engine design could help keep internal com... by ThrowawayR2 on Tuesday May 26, 2020 @11:36AM (#23312444)
> "And weighs 2 1/2 - 3 tons."

A bit of a tangent but it'll be interesting to see what effect an all electric vehicle future has on the design of roadways, bridges, etc. I imagine that many things will need to be rebuilt to handle the additional load.

Re:New two-stroke engine design could help keep internal com... by mikestew on Tuesday May 26, 2020 @12:46PM (#23313367)
They're already built for it. The '73 Pontiac Bonneville I rode around in as a kid weighed 4300 lbs. And as sibling comment mentions, anything not a car or light truck will outweigh anything with batteries. Our Sprinter-based RV weighs 10K lbs. empty, and it is a small RV.
Re:New two-stroke engine design could help keep internal com... by selectodude on Tuesday May 26, 2020 @12:31PM (#23313179)
They're already "designed" for 18-wheel trucks which weigh 15-20 times that. Even heavy EVs are nothing compared to heavy transport.
Re:New two-stroke engine design could help keep internal com... by ThrowawayR2 on Tuesday May 26, 2020 @12:39PM (#23313283)
To use your own example, they're designed to handle a certain quantity of 18 wheelers but they're not designed to handle traffic that is entirely composed of 18 wheelers.

Raising the average vehicle weight from 1.5 to 3 tons will definitely have an effect.

Re:New two-stroke engine design could help keep internal com... by selectodude on Tuesday May 26, 2020 @12:51PM (#23313430)
But not as much as it would seem, since road damage is a quadratic function of weight and one truck does as much damage as 9600 1 ton cars. Doubling the weight of the car would maybe narrow that by a few percentage points, but vehicle miles for any personal vehicle at essentially any weight is a rounding error compared to one truck.
Re:New two-stroke engine design could help keep internal com... by Retric on Tuesday May 26, 2020 @01:51PM (#23314246)
Bridges at least need to be designed for just 18 wheelers because over 50 years that’s going to happen at least once.
Re:New two-stroke engine design could help keep internal com... by war1025 on Tuesday May 26, 2020 @05:41PM (#23316747)
Roads are designed for a certain amount of "axle weight" [1] which basically means to carry a heavier load you need to add more axles to distribute the load.

I would guess electric cars are still negligible in that metric, though.

[1] https://en.wikipedia.org/wiki/Gross_axle_weight_rating

Re:New two-stroke engine design could help keep internal com... by scrumbledober on Tuesday May 26, 2020 @08:03AM (#23310043)
I'm also just really not sure the battery capacity will be able to scale that quickly. As it stands we are basically making EVs as fast as we make batteries.
Re:New two-stroke engine design could help keep internal com... by ForHackernews on Tuesday May 26, 2020 @09:00AM (#23310542)
Delivery vehicle fleets are going to go all-electric fast once the economics of operating them dictate it.
Re:New two-stroke engine design could help keep internal com... by Jedd on Tuesday May 26, 2020 @06:41PM (#23317295)
> The price of electric cars here is too high for most incomes ...

Where is 'here'?

Here in Australia the price of pure electric cars is way too high - and not helped by federal government (lack of) subsidies, tariffs, policy preferences for fossil fuel, lack of charging infrastructure, etc.

I recently scoped out comparable ICE vs full electric new vehicles, and 'around the same' quality/comfort/range/size we were looking at roughly 3.5x the cost for electric. A 5y cost projection for an ICE that does 4.5 litres / 100 km, even with anticipated (higher) servicing costs, doesn't get us to a compelling proposition.

Re:New two-stroke engine design could help keep internal com... by sergiosgc on Tuesday May 26, 2020 @08:40AM (#23310352)
Numbers for Portugal: In the last quarter of 2019, EVs (pure+hybrid) accounted for 4.6% of new vehicle sales, an 80% YoY increase. At these growth rates and start point, the 5-8 year estimate looks sound.
Re:New two-stroke engine design could help keep internal com... by ChuckNorris89 on Tuesday May 26, 2020 @09:11AM (#23310670)
The 4.6% you mention is not only small but also not useful here as it includes hybrids as well, not just pure EVs. Remove the hybrids and the number of pure EVs plummets

Let's face it, pure EV adoption is a lot slower than we'd like to and lying to ourselves about it doesn't help.

Re:New two-stroke engine design could help keep internal com... by sergiosgc on Tuesday May 26, 2020 @09:59AM (#23311176)
Hybrids are a gateway. I view them as in the same category as pure EVs, only "earlier technology". I own a hybrid, and I'm 90% sure my next car will be pure EV (3 years from now). I don't know any hybrid owner planning to ditch the electric motor on the next purchase, and know several planning to ditch the combustion engine on the next car.
Re:New two-stroke engine design could help keep internal com... by ChuckNorris89 on Tuesday May 26, 2020 @10:13AM (#23311342)
Yes, I agree with your point but this doesn't address your previous argument that a 4.6% market share in 2019 of hybrids and EVs combined out of which maybe 2% pure EV will result in a market dominance of pure EVs in 5 to 8 years. Such an exponential growth is no way possible in such a short time no matter how much you love EVs.

Hybrids are easy to justify buying as you don't depend on charging infrastructure or lack thereof but once you switch to pure EV that becomes your bottleneck which rules out drivers who don't have chargers available at their home or at work or who want to drive long distances on vacations with family or who don't have too much money to spend on a car.

Re:New two-stroke engine design could help keep internal com... by sergiosgc on Tuesday May 26, 2020 @12:49PM (#23313407)
I do not entirely disagree with you, I just don't have your certainty of the outcome. Predicting non-linear curves is next to impossible. A tiny movement in the beginning of the curve produces wildly different results. What I stated is different: 5-8 years for the market flipping towards EVs is _plausible_.

In other words, I can't prove with certainty that the market will flip, but I wouldn't bet on the contrary.

Re:New two-stroke engine design could help keep internal com... by mkl on Tuesday May 26, 2020 @08:55AM (#23310494)
Is there reason to expect exponential growth? Seems a bit doubtful to me. What was the YoY increase for other recent years? With linear growth, you'd be looking at 37 years with these growth rates and start point.
Re:New two-stroke engine design could help keep internal com... by CydeWeys on Tuesday May 26, 2020 @08:59AM (#23310535)
It caps out at 100%, so of course it's not going to be exponential growth. It is likely to be a logistic curve though, and we are still in the roughly exponential leftmost portion of it. Once there's mid-double-digit market penetration it's going to slow down a lot to roughly linear, then eventually, asymptotic.
Re:New two-stroke engine design could help keep internal com... by mkl on Tuesday May 26, 2020 @09:06AM (#23310608)
Yes, that's more what I'm picturing. That asymptotic phase makes 5-8 years seem unlikely unless a legal obstacle is introduced.
Re:New two-stroke engine design could help keep internal com... by maxdo on Tuesday May 26, 2020 @09:42AM (#23310978)
several battery breakthroughs that will dump the cost way bellow the holy grail of car batteries of $100/kwh that makes them on pair with ICE cars. Some estimates predict that they will go way bellow $80 in 2021-22, Means end of 2022 beginning of 2023 will be flooded with even cheaper comparing to Model 3 cars with better quality batteries. Good quality $25-30k electric car will be a new reality. Those segments attack bestsellers like Toyota Camry etc... I'm pretty sure the price war will push them even lower within 1-2 years. Means full line of EV's from very cheap to luxury by 2024-25 on a scale from multiple companies. As a result we will have cars on the market that cost the same, perform better, and cheaper in a lifetime from service and fuel perspective. Millennials and GenZ also very eco-friendly, which means younger people are eager to buy EV's. The only delay could be new battery terra-factories rollout lag. That might give an extra 1-3 years lifetime for ICE. After that the traditional car market will be shaking as never before.
Re:New two-stroke engine design could help keep internal com... by travisporter on Tuesday May 26, 2020 @09:55AM (#23311136)
great read on this topic - https://about.bnef.com/blog/behind-scenes-take-lithium-ion-b.... As usual, more nuanced than I naively thought. "Put simply, something that looks like a future breakthrough today might end up simply being another point on the curve, by the time it is developed and engineered into a viable product and brought to market in a decade’s time."
Re:New two-stroke engine design could help keep internal com... by ChuckNorris89 on Tuesday May 26, 2020 @10:40AM (#23311721)
>Millennials and GenZ also very eco-friendly, which means younger people are eager to buy EV's.

Actually, they're more likely to prefer a car free lifestyle unless of course they have a six figure job in finance or at FAANG but that's like 1% of Millennials and GenZ in Europe, the rest are broke AF.

Re:New two-stroke engine design could help keep internal com... by sergiosgc on Tuesday May 26, 2020 @09:55AM (#23311127)
It has held at exponential growth for ~5 years. It can't be exponential, it has to be a sigmoid, but I'd expect similar growth rates for a few years more.
Re:New two-stroke engine design could help keep internal com... by Brakenshire on Tuesday May 26, 2020 @12:33PM (#23313200)
I should probably say in the process of flipping rather than have flipped over that time period, it’s not going to be 100% or 80%, but the s-curve transition will be well underway, and car manufacturers will have their hands full developing the technology.
Re:New two-stroke engine design could help keep internal com... by ashtonkem on Tuesday May 26, 2020 @10:43AM (#23311760)
The Prius is the wrong kind of hybrid for that, as the Prius is a parallel hybrid; both the electric and the ICE power train terminate in a planetary gear for shifting power around between the two power sources and the wheels.

What you're looking for is a series hybrid, like the Chevy Volt. In a series hybrid the only thing the ICE powertrain does is run a generator to keep the battery topped up. This allows the ICE to run in its ideal power band range permanently, reducing its size and making gasoline only travel much more efficient while lowering vehicle cost.

Re:New two-stroke engine design could help keep internal com... by cmrdporcupine on Tuesday May 26, 2020 @02:12PM (#23314502)
The Chevy Volt is not a series hybrid. It can operate like one, in some modes, but GM actually found, especially for Gen 2, that a mixture of series and parallel is most efficient.

When the Volt runs out of battery, it's almost not noticeable apart from engine noise. The performance characteristics in hybrid mode are almost identical to EV mode in terms of torque/acceleration.

It's an engineering marvel. I love mine. Shame GM killed it.

Re:New two-stroke engine design could help keep internal com... by labcomputer on Tuesday May 26, 2020 @12:02PM (#23312832)
The 1st generation Chevy Volt works (almost) the same way as a Prius, and does not normally operate the way you've described it. The 2nd gen is similar, but borrows some of the "2-mode hybrid" design from the 2008-2012 Chevy truck transmission (in order to have two gear ratios in electric mode--much more elegant than the Taycan).

Both have a planetary gearset with engine on one gear, output on another, and an electric motor on the third. The difference lies on which gear the second electric motor is placed (motor shaft on the Volt, output shaft on the Prius), as well as some additional clutches and brakes in the Volt.

More info here: https://gm-volt.com/2015/02/20/gen-2-volt-transmission-opera...

Re:New two-stroke engine design could help keep internal com... by ashtonkem on Tuesday May 26, 2020 @12:16PM (#23312993)
Whoops, should’ve gone with the BMW i3 as my comparison vehicle.
Re:New two-stroke engine design could help keep internal com... by cmrdporcupine on Tuesday May 26, 2020 @02:13PM (#23314514)
And you'll find the Volt outperforms the i3 Rex in terms of hybrid efficiency and performance. When the i3 is in range extended mode it's pokey; and only meant to go a short distance before one gets a charge.
Re:New two-stroke engine design could help keep internal com... by ashtonkem on Tuesday May 26, 2020 @05:25PM (#23316590)
Is that a limitation of series hybrids, or is that a consequence of the engine used in these specific models? The gasoline engine in the 2nd generation volt has 3x the power of the one in the i3 (75kW vs 25kW).
Re:New two-stroke engine design could help keep internal com... by cmrdporcupine on Tuesday May 26, 2020 @05:43PM (#23316769)
Probably both? I do know that GM ended up going more "parallel" with Gen 2 than with Gen 1. And Gen 2 has more torque than Gen 1, despite switching to a lower displacement engine and going to an Atkinson (tuned for electricity generation) cycle.
Re:New two-stroke engine design could help keep internal com... by LeifCarrotson on Tuesday May 26, 2020 @02:14PM (#23314528)
Still, though, series hybrids like the Volt and BMW i3 just use regular inline-4 gas engines taken from their other production lines.

The Volt has basically the same engine as in the Chevy Sonic or Cruze, and the i3 range extender option uses the same engine as their C600 series scooters. Those engines are designed with a quick throttle response and a wide power band to operate over an RPM range sufficient to drive a vehicle through a regular transmission.

I don't doubt that for the same time and money, it was far better for GM and BMW to take advantage of the economies of scale around those products than to design an engine specifically to function as a range extender, but if they really took this as a core function or started from scratch I expect they might select a medium-speed industrial diesel engine instead: something optimized for a particular speed and power output that does that one thing optimally.

Re:New two-stroke engine design could help keep internal com... by cmrdporcupine on Tuesday May 26, 2020 @04:10PM (#23315856)
Again, completely untrue. A) Volt not a series hybrid B) the gas engine in Gen 2 Volt was not taken from their production line, it is an Atkinson Cycle engine designed for generators, not for their crappy ICE trucks and SUVs.

C'mon, can people research before opining?

"While it shares many parts with the new 1.5L I-4 used in other GM products, the Gen II engine’s combustion process and calibration are specific to the Volt. Its larger displacement not only improves fuel efficiency but also provides more torque, which contributes to the Gen II Volt’s surprising quietness."

https://www.wardsauto.com/engines/gen-ii-chevy-volt-propulsi...

Re:New two-stroke engine design could help keep internal com... by kevin_thibedeau on Tuesday May 26, 2020 @02:37PM (#23314805)
Same physical components doesn't mean that the injection mapping wasn't customized for the constrained application.
Re:New two-stroke engine design could help keep internal com... by LeifCarrotson on Tuesday May 26, 2020 @03:13PM (#23315272)
I hope they customized the injection mapping, but the GM LUU engine is still a naturally aspirated gas engine with 10.5:1 compression and 73.4 x 82.6 mm bore/stroke ratio, measurements which primarily came from the ICE-only target applications it was designed for.
Re:New two-stroke engine design could help keep internal com... by Brakenshire on Tuesday May 26, 2020 @12:36PM (#23313237)
I mean more the target market of the Prius rather than the underlying technology.
Re:New two-stroke engine design could help keep internal com... by hundchenkatze on Tuesday May 26, 2020 @11:14AM (#23312171)
Couldn't Toyota have just created another version of the Prius that operated this way?
Re:New two-stroke engine design could help keep internal com... by UI_at_80x24 on Tuesday May 26, 2020 @11:46AM (#23312591)
Or as an add-on trailer.

Tow your own generator.

Re:New two-stroke engine design could help keep internal com... by AnthonyMouse on Tuesday May 26, 2020 @12:38PM (#23313257)
That's a really good idea. You typically only need it on long trips, and then it can also be a normal trailer to load all your gear into. Meanwhile when you get to your trip destination, now you have a generator to run electrical devices without having to worry about running down the car's battery.

And it's normally at home, so if the power goes off for a week you can still run your house and charge your car.

Re:New two-stroke engine design could help keep internal com... by ajuc on Tuesday May 26, 2020 @05:50PM (#23316851)
You should just be able to rent the trailer if you need it a few times a year. Parking space for a trailer that you're never using is going to cost you too much in big cities.
Re:New two-stroke engine design could help keep internal com... by Vrondi on Tuesday May 26, 2020 @03:06PM (#23315181)
This is brilliant.
Re:New two-stroke engine design could help keep internal com... by extrapickles on Tuesday May 26, 2020 @01:09PM (#23313678)
You would need a 20-30kw generator+fast DC charger as the built it AC charger in most electric cars is not fast enough to maintain a charge at highway speeds (especially while towing something).

Like other commentators have mentioned, if a u-haul like network of these were made, if you ran out of charge somewhere, they could drop one of these off to get you going again, as a depleted battery pack will charge slowly, making the van full of batteries potentially more expensive (you would have to pay for an extra 15-30m of their time).

Re:New two-stroke engine design could help keep internal com... by wtallis on Tuesday May 26, 2020 @02:43PM (#23314892)
20-30kW might be a bit higher than needed unless the trailer is oversized to provide extra cargo capacity in addition to carrying the generator. You don't need a generator big enough to prevent the battery from draining at all; you just need to extend the range enough to cover a full day of driving while offsetting the extra drag from the trailer. 10-15kW is probably plenty for a trailer that only carries the generator: that would double the highway range of a Model S and would weigh about 700 lbs while being compact enough to have very little aerodynamic drag. A 30kW generator would be enough to double the range even if the trailer doubled the energy consumed per mile, and that's only going to happen with a pretty large trailer.
Re:New two-stroke engine design could help keep internal com... by extrapickles on Tuesday May 26, 2020 @07:03PM (#23317479)
The Model S is fairy efficient and aerodynamic compared to other EVs.

If anyone did this, they probably would offer 15kW and 30kW versions, so both passenger cars and light trucks would be covered.

Re:New two-stroke engine design could help keep internal com... by bigredhdl on Tuesday May 26, 2020 @12:02PM (#23312834)
Thats actually a pretty sweet idea. Only take the generator with you when you need it.
Re:New two-stroke engine design could help keep internal com... by TeMPOraL on Tuesday May 26, 2020 @12:50PM (#23313417)
Make them pluggable into the car (vs. towable) and standardize on the interface, and there could be market for renting the generators (like e.g. you do with city bikes - take them from one station, drop off on another).
Re:New two-stroke engine design could help keep internal com... by allannienhuis on Tuesday May 26, 2020 @03:47PM (#23315624)
Attach it to the tow hitch framework like a bike rack. :)

I suspect that would really mess with the load dynamics on most passenger type cars, as the generator would be pretty heavy. I don't think you'd be able to lift a big enough one into the trunk area, and attaching it to the back of the car would be a pain too. I think towing solves a lot of issues for the idea.

Re:New two-stroke engine design could help keep internal com... by Imaiomus on Tuesday May 26, 2020 @08:56AM (#23310515)
this one its in late development http://innengine.com/home/
Re:New two-stroke engine design could help keep internal com... by jacobush on Tuesday May 26, 2020 @09:54AM (#23311123)
If they don't have a working prototype I can't see how it's in late development.
Re:New two-stroke engine design could help keep internal com... by numpad0 on Tuesday May 26, 2020 @10:24AM (#23311504)
The more I learn about electrics and hybrids the Prius PHV starts to make more and more sense... except for that hideous face of ZVW50
Re:New two-stroke engine design could help keep internal com... by henearkr on Tuesday May 26, 2020 @05:21AM (#23308907)
There is not a huge gap at all.

Li-metal batteries [edit: still an immature tech] are at around 14 MJ / kg, and gasoline is at 47.5 MJ / kg.

Moreover, suppose that you are really "off-grid". Meaning, you are off any fuel supply network!! In this case precisely, you would be saved by electric-related techs, such as photovoltaic.

Re:New two-stroke engine design could help keep internal com... by ash on Tuesday May 26, 2020 @06:44AM (#23309449)
> Li-metal batteries top at around 14 MJ / kg

Do you have a link to back this number? Are these batteries rechargeable? Does the measurement include wiring, cooling, cell connections and overall structure of the battery pack?

For comparison, Tesla's (Li-ion) battery pack energy density is 160 Wh/kg, which is 0.576 MJ/kg:

https://www.pv-magazine.com/2020/02/11/energy-density-advanc...

Re:New two-stroke engine design could help keep internal com... by readams on Tuesday May 26, 2020 @09:59AM (#23311181)
At that point you need to consider the whole car. The engine needed to extract energy from that fuel is much bigger in the ICE car. And it also needs cooling, etc.

Comparing just the gas tank to several subsystems of a battery electric vehicle is not really an interesting comparison. The closest comparison at that level is just gas vs just cells.

Overall electric is still lower energy density per weight, but is also far more efficient. The whole Tesla pack has the energy of just a couple gallons of gas but can go 400 miles.

Re:New two-stroke engine design could help keep internal com... by henearkr on Tuesday May 26, 2020 @06:48AM (#23309474)
I used that, and actually I may have missed the bit where they explain that "lithium metal as an anode were suggested for future high-energy-density batteries", implying that it's still an immature tech.

https://pubs.rsc.org/en/content/articlelanding/2019/ee/c9ee0...

Re:New two-stroke engine design could help keep internal com... by lizknope on Tuesday May 26, 2020 @08:08AM (#23310081)
I have driven through parts of the western US where it is 100 miles to the next gas/petrol station. There are farms and ranches in these areas but they are connected to the electrical grid with wires. It seems like having an electric tractor and charging at the farm would be more convenient than transporting hundreds of gallons of diesel fuel from 100 miles away.
Re:New two-stroke engine design could help keep internal com... by Vvector on Tuesday May 26, 2020 @08:27AM (#23310243)
Tractors are bursty. They are heavily used at planting and harvesting. Farmers can't spend long periods of time recharging in the middle of planting season. And it would be too expensive to buy 12 hours of battery capacity for a couple times a year.

Gas still wins with a short refuel time.

Re:New two-stroke engine design could help keep internal com... by supportlocal4h on Tuesday May 26, 2020 @09:51AM (#23311087)
Actually, batteries win on refuel time. Swapping batteries is much faster than filling a tank. Gas wins on meantime between refuels and in other categories. Farmers can and happily will spend super long periods of time recharging if they can operate during the recharge.

My own initial experiences have been mixed. Overall advantage still goes to gas. But I think we're very close to getting this battery thing figured out. Just a few years away. When we look back it will seem like it happened overnight.

Re:New two-stroke engine design could help keep internal com... by gambiting on Tuesday May 26, 2020 @10:47AM (#23311818)
>>Actually, batteries win on refuel time. Swapping batteries is much faster than filling a tank

By that logic, you could say that there is absolutely no difference, because if you can imagine a car where the battery can be swapped, you should be able to imagine a car where the entire fuel tank is swapped. A tractor arrives at a station, and instead of filling up 500 litres of diesel, the entire tank is simply replaced with a full one. It wins again since fuel tanks are cheap - they are just metal and plastic after all, you can have several just sitting there, full or empty.

The fact that no one has done it yet suggests that this really isn't an issue - commercial diesel filling stations usually run at much higher pressure than your regular pumps, a truck/tractor tank fills in minutes because of a much higher flow rate.

Re:New two-stroke engine design could help keep internal com... by bananabreakfast on Tuesday May 26, 2020 @02:26PM (#23314671)
That is very silly and disingenuous argument to make and a total straw man.

Swapping gas tanks provides no advantage and you conveniently ignore the whole point of the batteries which is that you don't need any fuel infrastructure to fill your tanks!

Re:New two-stroke engine design could help keep internal com... by Vvector on Thursday May 28, 2020 @10:56AM (#23338018)
> you don't need any fuel infrastructure to fill your tanks!

A fuel infrastructure costs magnitudes less than just one battery pack. You just need a large tank and pump.

Re:New two-stroke engine design could help keep internal com... by xyzzyz on Tuesday May 26, 2020 @01:43PM (#23314155)
Swapping 2000 lbs+ of batteries is faster than filling tank? When is the last time you hauled thousands of pounds? It ain’t fast, let me tell you that.
Re:New two-stroke engine design could help keep internal com... by supportlocal4h on Tuesday May 26, 2020 @09:41PM (#23318550)
Perhaps you've never seen a 1500 lbs steer get its hooves trimmed. Or a 1 ton bail get loaded and unloaded in seconds. Or somebody change the tire on a tractor.

Farmers have machines and equipment for almost everything. Swapping out a flat pack? POC

Re:New two-stroke engine design could help keep internal com... by tengbretson on Tuesday May 26, 2020 @01:20PM (#23313836)
> Actually, batteries win on refuel time. Swapping batteries is much faster than filling a tank.

Swapping batteries implies either having multiple batteries, which adds to you costs significantly, or it implies adding yet another proprietary service company putting the screws to you in your supply chain.

Re:New two-stroke engine design could help keep internal com... by supportlocal4h on Tuesday May 26, 2020 @09:50PM (#23318593)
As I wrote, I still give gas the overall edge right now. But not by a wide margin, and that margin is dwindling.

For instance, don't forget the fuel suppliers, tank inspectors, etc, in the supply chain on the other side.

I was just commenting on the point of refuel time.

Re:New two-stroke engine design could help keep internal com... by brutt on Wednesday May 27, 2020 @06:04AM (#23321255)
By limiting charging to 80%, battery will degrade less. Even farmers need to eat and pee. Battery can be charged to 80% in 20 minutes.

Also, it's possible to use extended swapable batteries for such cases.

Re:New two-stroke engine design could help keep internal com... by bluGill on Tuesday May 26, 2020 @09:37AM (#23310919)
Tractors use a lot of horsepower constantly. Cars are burst. Put the pedal to the floor on a Tesla and you are up to the speed limit in seconds at which time you back off. Take your Tesla to an infinite straight track and put the pedal to the floor and the battery will be dead in a few minutes. (though probably something else will break first)
Re:New two-stroke engine design could help keep internal com... by jacquesm on Tuesday May 26, 2020 @10:01AM (#23311201)
A tractor will go through fuel faster than you can imagine if you've never worked with one. Plowing a field or running some powered attachment while you have the creeper gears engaged will cause a nice little vortex in your fuel tank.
Re:New two-stroke engine design could help keep internal com... by AnonC on Tuesday May 26, 2020 @06:13AM (#23309210)
> There is not a huge gap at all.

> Li-metal batteries top at around 14 MJ / kg, and gasoline is at 47.5 MJ / kg.

Wouldn’t this gap actually be very close considering that the efficiency of an ICE on gasoline is what, 30-40% at best (IIRC)?

Re:New two-stroke engine design could help keep internal com... by avhon1 on Tuesday May 26, 2020 @06:26AM (#23309293)
It depends. Electric motors also have losses in their controllers, which removes another 5% or 10%. If you want mechanical power output and have 1kg of pre-charged batteries and 1kg of liquid fuel, the efficiency of electric motors might close the density gap. Lets assume 95% efficient controller+motor (slightly optimistic) and 30% efficient ICE (somewhat pessimistic).

1kg * 14 MJ/kg * 95% = 13 MJ mechanical

1kg * 47 MJ/kg * 30% = 14 MJ mechanical

It comes out pretty close!

If you want mechanical power and also heat (for keeping people, animals, or equipment warm, decreasing the viscosity of fluids, etc), ICE is definitely the way to go.

-- edit --

/u/ash points out Tesla's energy density is is 0.576 MJ/kg

1kg * 0.58 MJ/kg * 95% = 0.55 MJ mechanical

...not even slightly close.

Re:New two-stroke engine design could help keep internal com... by varjag on Tuesday May 26, 2020 @08:10AM (#23310106)
You should factor in regenerative braking of EVs, which is lost as heat for fossils vehicles.
Re:New two-stroke engine design could help keep internal com... by petre on Tuesday May 26, 2020 @08:21AM (#23310205)
One can't really charge a battery with power spikes from randomly hitting the brakes. Only part of the braking energy is recoverable, for example when braking to reduce speed while descending a long slope. Braking strategy should also be different in this case: similar to engine braking in regular vehicles. Since most EVs rarely have a multi speed gearbox, regenerative braking should be built into the brake pedal.
Re:New two-stroke engine design could help keep internal com... by varjag on Tuesday May 26, 2020 @09:46AM (#23311023)
In practice it works fine on all EVs I driven. Doesn't take much getting used to.
Re:New two-stroke engine design could help keep internal com... by rootusrootus on Tuesday May 26, 2020 @09:10AM (#23310662)
I'd wager there are far more fossil fuel vehicles on the road with regenerative braking than there are EVs.
Re:New two-stroke engine design could help keep internal com... by varjag on Tuesday May 26, 2020 @09:44AM (#23311005)
Intrigued, how would that work?
Re:New two-stroke engine design could help keep internal com... by organsnyder on Tuesday May 26, 2020 @10:03AM (#23311221)
I think OP is referring to hybrid ICE vehicles.
Re:New two-stroke engine design could help keep internal com... by bluGill on Tuesday May 26, 2020 @09:39AM (#23310954)
Not very much when you are on the freeway.
Re:New two-stroke engine design could help keep internal com... by varjag on Tuesday May 26, 2020 @09:43AM (#23310995)
I guess if you never ever use brakes it has no advantage.
Re:New two-stroke engine design could help keep internal com... by Hypx on Wednesday May 27, 2020 @03:17AM (#23320300)
There's also hydrogen fuel cells to consider, which at 142 MJ / kg and 50% efficiency looks like this:

1 kg * 142 MJ / kg * 50% = 71 MJ mechanical

The dominant solution above all else.

Re:New two-stroke engine design could help keep internal com... by leoedin on Tuesday May 26, 2020 @09:51AM (#23311079)
I was using off-grid in the most straightforward of senses - off the electricity grid. That doesn't necessary mean stationary or without weight limits (as solar would require) - it could mean long distance trucking, or logging, construction, or even the maintenance of electricity pylons (which probably can't be turned on during that process).

All those require huge amounts of energy, and batteries are not yet nearly there (as others point out, your numbers for battery energy density are out by a factor of 30).

Re:New two-stroke engine design could help keep internal com... by sokoloff on Tuesday May 26, 2020 @07:08AM (#23309607)
Airliners are off-grid while in use but fly from fuel supply to fuel supply.

They are also quite weight sensitive, requiring additional induced drag to be overcome at heavier weights.

Re:New two-stroke engine design could help keep internal com... by jlg23 on Tuesday May 26, 2020 @09:19AM (#23310751)
> Moreover, suppose that you are really "off-grid". Meaning, you are off any fuel supply network!! In this case precisely, you would be saved by electric-related techs, such as photovoltaic.

Albeit in theory true, here in the outskirts of the Sahara, I have yet to find a village where I can get an electrician to fix my solar panels, though a few bottles of gasoline can be found everywhere.

Re:New two-stroke engine design could help keep internal com... by avhon1 on Tuesday May 26, 2020 @05:36AM (#23308989)
Or saved by combustion-related techs, such as biofuel, biogass, wood gas, or just plain-old "burn organic matter".
Re:New two-stroke engine design could help keep internal com... by henearkr on Tuesday May 26, 2020 @05:39AM (#23308998)
But, using electric, I just have to charge it by plugging in a solar panel. With existing OTS products.

If I want to burn dead leaves to run my car... well that sucks right now (moreover that isn't anymore 0 emission).

Re:New two-stroke engine design could help keep internal com... by avhon1 on Tuesday May 26, 2020 @05:57AM (#23309101)
You can turn that around just as easily.

If I run off to start a farm, and I buy an existing OTS used tractor, it will have a tank that I can pour almost any flammable liquid into to make it run. If I want to plug the tractor in... well, that'll get the engine to turn over, but it won't get it moving anywhere.

If I build myself a cabin in the woods, I can burn wood or wood pellets to keep cook food, or keep warm during the winter. Alternatively, I could purchase batteries, PV panels, and the necessary charge control electronics, in order to run an electric heater.

Burning recently-alive biomass does release carbon, but it's carbon that was in the atmosphere as recently as a few months ago. It isn't zero emission, but it doesn't contribute a long-term increase to the amount of carbon in the atmosphere.

Re:New two-stroke engine design could help keep internal com... by 7952 on Tuesday May 26, 2020 @09:04AM (#23310593)
Other emissions like particulates can be worse from wood burning. And most of the CO2 is likely to have been collected over a much longer period than a few months. Without a significant tree planting effort it is likely to increase CO2 levels.
Re:New two-stroke engine design could help keep internal com... by jacquesm on Tuesday May 26, 2020 @10:02AM (#23311211)
Burning dead leaves actually does count as carbon neutral. The balance is whether you burn fossil fuels, not whether or not you burn anything at all.
Re:New two-stroke engine design could help keep internal com... by henearkr on Tuesday May 26, 2020 @05:26PM (#23316597)
No, this does not work.

A forest is a carbon store. Burning trees puts carbon from this store to the atmosphere.

To count it as carbon neutral is an accounting mistake, that could be very costly...

Burn the dead leaves and you shrink humus (or annihilate it, depending on how much you do it), another huge carbon store. So that makes it yet another accounting mistake.

More generally, it is good practice to separate well atmospheric carbon (CO2) and captive carbone (anything in solid/liquid state). Just show that faithfully in the accounting method, and a lot of good will follow.

Re:New two-stroke engine design could help keep internal com... by jacquesm on Tuesday May 26, 2020 @07:22PM (#23317604)
You are mistaken. I don't have the time right now to explain in detail but it really is quite simple: burning new forest is carbon neutral.

https://wood-energy.extension.org/is-burning-wood-carbon-neu...

Re:New two-stroke engine design could help keep internal com... by henearkr on Tuesday May 26, 2020 @07:59PM (#23317900)
You are thinking about the set of two actions {growing a forest from bare ground + burning it}. That indeed would be zero-emission.

But burning a preexisting forest is cancelling an existing carbon store and converting lots of solid carbon into atmospheric carbon.

The fact a forest is a carbon store is precisely why a startup such as Pachama exists: they help grow new forests to capture carbon.

https://pachama.com

Would you then just unnoticingly burn them for energy, and keep telling the customers that you just captured a net amount of carbon?

PS: oh you are jacquesm! :) didn't notice. How are you?

PPS: some critic about the link you sent me ("wood-energy.extension"): I disagree with what they say, in that fallen wood too is a carbon store, and in a forest at equilibrium the amount decomposed by fungi/bacteria is roughly compensated by the newly fallen wood. So that's just a carbon store, and if you begin to burn it you shrink this store.

Re:New two-stroke engine design could help keep internal com... by Hypx on Wednesday May 27, 2020 @03:15AM (#23320275)
Hydrogen tops out at 142 MJ / kg. Disappointing that so few here are aware of this basic fact.

It seems obvious that if you want the density of liquid fuels, hydrogen is the answer. Compromising yourself with a lower energy density substance stands as a very difficult problem to solve.

Re:New two-stroke engine design could help keep internal com... by 0xffff2 on Tuesday May 26, 2020 @03:30PM (#23315457)
>edit: still an immature tech

If there was a Nobel Prize for understatement, this comment would take it hands down.

New "breakthroughs" in battery energy density are a dime a dozen. They're proving incredibly difficult to bring to commercial viability, and there's no evidence that that's going to change.

Re:New two-stroke engine design could help keep internal com... by henearkr on Tuesday May 26, 2020 @06:13PM (#23317058)
Thanks I'm very honored.
Re:New two-stroke engine design could help keep internal com... by burmanm on Tuesday May 26, 2020 @05:40AM (#23309006)
Yes, photovoltaics during winter are a dream. "Charging next time in 6 months".
Re:New two-stroke engine design could help keep internal com... by avhon1 on Tuesday May 26, 2020 @06:04AM (#23309153)
It's not quite that bad. Solar panels that point directly at the sun during the summer solstice will still receive 91% the density of light during the winter solstice. ( cos(24deg) ~= 0.91 ) Where I live (about 40deg north), the winter solstice is 63% as long (9.5 hours) as the summer solstice (15 hours). Even a thick blanket of snow, or 100% cloud cover, will only reduce power by about 50%.

---

Under the worst possible conditions (not considering temperature), on the shortest day of the year, with 100% clouds and a thick layer of snow, PV panels would produce 14% as much power per day as on the longest day of the year with 0 cloud cover.

Re:New two-stroke engine design could help keep internal com... by henearkr on Tuesday May 26, 2020 @05:44AM (#23309023)
Not at all, except if you mean arctic winter (when it's technically night all the day).

Also, electric offers you the plethora of choices in methods to produce your energy. If it's not photovoltaic, you still have many solutions. Could as well be eolian, or a dam, or hundred of people riding generator-bikes (half-kidding), or etc.

Re:New two-stroke engine design could help keep internal com... by 34679 on Tuesday May 26, 2020 @08:11AM (#23310119)
>hundred of people riding generator-bikes (half-kidding)

I've wondered if it makes sense for gyms to be paying for electricity.

Re:New two-stroke engine design could help keep internal com... by bananabreakfast on Tuesday May 26, 2020 @02:29PM (#23314707)
It's funny to think about, but if you do the math even dozens of humans riding bikes contribute so little energy compared to what a building requires it is totally negligible and would never be worth the cost beyond a gimmick.
Re:New two-stroke engine design could help keep internal com... by henearkr on Tuesday May 26, 2020 @08:19AM (#23310188)
Also, what about energy-producing gym equipment in airliners?

Free energy (but maybe only an epsilon), and no more deep vein thrombosis!!

Re:New two-stroke engine design could help keep internal com... by baq on Tuesday May 26, 2020 @07:15AM (#23309661)
Easy to fix with overpaneling unless you’re over 60ish latitude or live in a valley or something.
Re:New two-stroke engine design could help keep internal com... by grecy on Tuesday May 26, 2020 @02:27PM (#23314676)
While it's true that liquid fuel is more energy dense than batteries, you have to remember that most Internal Combustion Engines are only around 20% efficient.

So even though you're carrying around a huge amount of potential energy in the form of gasoline, your engine can only covert about 20% of that into motion.

Re:New two-stroke engine design could help keep internal com... by m-p-3 on Wednesday May 27, 2020 @08:31AM (#23322203)
And it's hard to deny one advantage of combustible against batteries.

The weight of combustible tank goes down as it become empty, while a battery weight remains constant.

This must have a huge decisional impact when manufacturing aircrafts.