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A comment on Fewer than 3% of cars sold in the U.S. have manual transmissions. Parent comment

Re:Fewer than 3% of cars sold in the U.S. have manual transm... by yason on Thursday November 17, 2016 @04:39AM (#12975911)
This used to be the case with fuel injected engines from 80's to 00's but because of new regulations current ECUs might, again, inject fuel while coasting just to keep the catalytic converter warm and operational.

The amount is obviously negligible but it's quite crazy to spend more fuel in order to reduce emissions :)

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Re:Fewer than 3% of cars sold in the U.S. have manual transm... by Retric on Thursday November 17, 2016 @05:55AM (#12976285)
Smog is a real health issue, and US city's are vastly better now. So, IMO it's well worth a tiny bit more global warming.
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Re:Fewer than 3% of cars sold in the U.S. have manual transm... by gregors on Thursday November 17, 2016 @01:35PM (#12980075)
Check out what's going to go into Chinese cars ..... https://www.youtube.com/watch?v=S3cFfM3r510
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Re:Fewer than 3% of cars sold in the U.S. have manual transm... by crottypeter on Thursday November 17, 2016 @06:48AM (#12976572)
> The amount is obviously negligible but it's quite crazy to spend more fuel in order to reduce emissions :)

That is what Volkswagen are being forced to do.

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Re:Fewer than 3% of cars sold in the U.S. have manual transm... by justin66 on Thursday November 17, 2016 @09:45AM (#12977827)
This is interesting. How do hybrids handle this? Use electricity to warm the converter?
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Re:Fewer than 3% of cars sold in the U.S. have manual transm... by morganvachon on Thursday November 17, 2016 @10:14AM (#12978082)
This may be a bit too much information, but it's a good read if you're interested in the technology behind it:

https://hal.archives-ouvertes.fr/hal-01062316/document

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Re:Fewer than 3% of cars sold in the U.S. have manual transm... by mmagin on Thursday November 17, 2016 @01:59PM (#12980295)
I suspect they just put a sensor there and inject fuel if it cools too much. For short coasting it's probably not a problem.
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Re:Fewer than 3% of cars sold in the U.S. have manual transm... by mikepurvis on Thursday November 17, 2016 @09:52AM (#12977880)
Emissions per mile, miles per gallon, capital cost. You can only optimize two of them.
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