Re:Solid-state EV batteries now face "production hell"
by etrautmann on Sunday January 28, 2024 @01:06AM
(#39162993)
No, it means that you can leverage a more efficient part of an engine’s torque curve by supplementing with electric power at the low and high end (since motors have a flatter torque curve).
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Re:Solid-state EV batteries now face "production hell"
by sharpneli on Sunday January 28, 2024 @01:37AM
(#39163107)
Not just that. It does require Atkinson cycle to reach the efficiencies they have. It just means that the compression stroke is shorter than the power stroke.
Basically with that cycle they can get massive compression ratios. As an example newer Toyotas are at 14:1 ratio with 41% thermal efficiency. That’s close to diesel territory on a gasoline car.
Naturally when you floor it it goes to Otto cycle and efficiency drops.
Re:Solid-state EV batteries now face "production hell"
by fho on Sunday January 28, 2024 @07:30AM
(#39165061)
And, in the case of Toyotas eCVTs, keeping the ICE in the most-efficient-rpm sweet spot longer by allowing the ICE RPM to be pretty much independent of the wheel RPM. It's somewhat strange because RPM noise barely correlats with speed or acceleration anymore.
Also: start-stop-automatic for free ... I am still somewhat spooked when the motor just turns off going 70 km/h because the ECU decides that the ICE is not needed anymore.