Looks to me like they turned the wankel engine inside out.
This actually solves one of the biggest problems the wankel rotary has- the fact that a part of the fuel is in front of the flame and moving away from it, leading to a longer burn duration that overall decreases efficiency and effective expansion ratio.
I still need to get my own prototype running.
What I have is a piston engine that achieves a 4-stroke cycle using only 3 moving parts and fires twice per revolution per cylinder. 1:1 power to weight ratio should be possible even with an all steel construction.
After 5 years of testing and out of pocket R&D, I have a crude prototype that demonstrates the operating cycle and produces a beautiful blue cloud of fire off the exhaust header even though it still doesn't run.
Whats been staring me in the face for most of that 5 years is that my ignition system wasn't working reliably- there's a very good chance that in the most recent tests it has only ignited perhaps once every 3rd or 4th power stroke. My breaker point mount would vibrate at cranking speed, and the points themselves would sometimes weld shut and overheat the ignition coil.
A solid state ignition driver is being fitted that will let the engine use a magnetic pickup or even a rotary encoder to allow for coupling to a homemade ECM. With this revision there's a good chance it will actually run on its own for the first time, despite having been made almost entirely out of scrap steel on a tight budget.