Internal Combustion Engine Thermal Efficiency

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Funkworks

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My guess is they use a variable compression ratio which is a mechanical marvel they claim having been first to release in an Infinity model. Here’s a Nissan video showing the mechanism at 1:22.

GM is also working on variable compression ratios and here’s someone with an explanation:

Still not battery level efficiency. But still awesome.
 
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PayLoad

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I'm an engine nut, love new designs, but this is like inventing a better candle when the light bulb was coming into fashion
 

Funkworks

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But candles still sell!

I think ICEs will still be around for a long time but in dwindling numbers and kept for specialized use. According to a Toyota Corolla Hybrid salesman I talked to, the world still can't produce enough car batteries for everyone who wants one (like me).
 

neil_w

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I think ICEs will still be around for a long time but in dwindling numbers and kept for specialized use. According to a Toyota Corolla Hybrid salesman I talked to, the world still can't produce enough car batteries for everyone who wants one (like me).
While it is true that BEV production is battery still battery-constrained, keep in mind that Toyota has for years had a corporate anti-BEV bias. Don't trust what a Toyota salesman tells you on this.

This has been a general problem with sale of BEVs: dealers are somewhat disincentivized from selling them since they don't bring in service revenue, and they have a tendency to discourage customers from buying them even when they're selling them. That's one reason Tesla doesn't want to sell through dealers (there are other reasons as well).

But: I agree completely that ICEs will be around for a while in a progressively reduced role. A more efficient ICE that is tailored for hybrids is a worthwhile development.
 

Funkworks

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While it is true that BEV production is battery still battery-constrained, keep in mind that Toyota has for years had a corporate anti-BEV bias. Don't trust what a Toyota salesman tells you on this.
That was his excuse as to why he didn't have any in stock I could test drive: long waiting lists. It sort of makes sense though. No rush on my side. Been shopping for years now. lol.
 

jderimig

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I call BS on this one. The Carnot efficiency (actually theoretical Otto Efficency) of a ICE is 47%.
 

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