At first glance bares some resemblance to a rotary engine. Has no valves, no pistons, no radiator doesn't even need a trans! Interesting concept, they are making some strong claims, wonder if it can be proven, 60% efficiency and 90% reduction in emissions! Looks like a match made in heaven for a electric motor hybrid, so compact an lightweight:
http://green.autoblog.com/2011/04/08...-future-video/