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Date: Thu, 15 Dec 2022 06:13:33 -0800 (PST)
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Subject: High Efficiency Hybrid Cycle Engine
From: Fred Bloggs <bloggs.fredbloggs.fred@gmail.com>
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Startup=E2=80=99s rotary engine, based on novel thermodynamics, is lighter,=
 quieter, more efficient than counterparts. Power to weight is 10x conventi=
onal.

https://news.mit.edu/2014/liquidpiston-small-efficient-rotary-engine-1205

Simplified overview:

https://en.wikipedia.org/wiki/Liquidpiston

A real hard sell here, seems too good to be true. It could revolutionize EV=
s, by going hybrid with green fuel and allowing a huge reduction in battery=
 power requirement.

"Demand for electric vehicles is off the charts, with an expected growth of=
 380% more EVs on the road by 2030. That=E2=80=99s creating a problem. The =
demand for EVs is causing a shortage in precious metals like lithium. By us=
ing our engine we can make hybrid electric cars with 80% smaller batteries.=
"

https://www.liquidpiston.com/

Looks like they might be a bit pricey. The manufacturing probably requires =
extreme precision, and materials treatment. Looks like most of the existing=
 buys are from the cost-is-no-object sector.