i've seen several of these super efficient engine designs come by on this forum.
strangely enough, my BMW still has a regular old otto cycle Turbo Diesel in it...
They started in 2005
one year with 6-7 articles in their "news" section
It even made it to Pelican Parts Forums in 2006
MYT engine thread in 2006..
http://forums.pelicanparts.com/off-topic-discussions/285831-myt-massive-yet-tiny-engine.html?highlight=revolutionary+engine
Then 3.5 years and still nothing more to show for then this website??
Note even a video of it running as a combustion engine, only one where they run it with compressed air...
YouTube - MYT Engine Running (HIGH QUALITY VIDEO)
Something tells me that they can't get it to run with gasoline, let alone run it reliably in any kind of application that would suit a motor vehicle...
There have been others on this forum.
- An ottocycle engine that had a revolutionary valve train, eg, no valves, but an opposing piston.
- ReveTec Engine,crazy revs, fuel econonomy and power claims... there was actually a video of a working example, on gasoline, not compressed air..
And several more like this