Here is their diagram[1] of the cycle. Wankel engine uses the otto cycle (blue), theirs is what they are calling the High Efficiency Hybrid Cycle, or HEHC (in r

Here is their diagram[1] of the cycle. Wankel engine uses the otto cycle (blue), theirs is what they are calling the High Efficiency Hybrid Cycle, or HEHC (in red). In terms of shape they do seem approx. the same, so when LiquidPiston says theirs is different I think they are just saying it is a more efficient cycle, not fundamentally different in terms of stages. [1] https://uploads-ssl.webflow.com/5f6086e9bbbabd41a20f2984/5f7d7a4ab14f906c57d07892_cycles-1024x676-1-768x507.jpg https://uploads-ssl.webflow.com/5f6086e9bbbabd41a20f2984/5f7...