Nah. It has almost all the problems of Wankel. Low torque, difficult sealing, weirdly shaped expansion chamber (where part of the burn happens at high RPM, thi

Nah. It has almost all the problems of Wankel. Low torque, difficult sealing, weirdly shaped expansion chamber (where part of the burn happens at high RPM, this might get you impurities in the burn). This seems to be kinda "sleeve valve" type valves. Poppets dominate for couple of reasons: A quick open and close and B self sealing. Both features that these things necessarily lack. The balance of the thing seems horrible. You could get good balance if you put four of these on single crankshaft. But then you have 12 incredibly small burn volumes for given size of engine -> even less torque. "A dwell near top-dead-center forces combustion to occur at nearly constant-volume conditions." If you increase chamber pressure in regular engine during top dead center, you risk breaking the crankshaft. It's likely this thing can only do it because of low HP and no crankshaft. Which in turn fucks the balance. I'd pick rotary Atkinson over this. https://en.wikipedia.org/wiki/Atkinson_cycle https://en.wikipedia.org/wiki/Atkinson_cycle