LiquidPiston’s XTS-210 engine is ideal for UAV applications, portable power generation, and other military and defense applications. 1. The XTS-210 employs a high-efficiency hybrid cycle (HEHC ...

LiquidPiston isn't just playing with engine shapes—in its own words, it's also trying to reinvent the thermodynamic cycle. "The HEHC [High Efficiency Hybrid Cycle] cycle is a four-stroke cycle.

A thermodynamic cycle simulation using multiple zones for the combustion process was used to obtain the performance, energy and availability characteristics for an automotive spark-ignition engine. In ...

Variable cycle engine design embodies a transformative approach in aero‐propulsion, enabling engines to adapt their thermodynamic cycle to meet diverse operational demands, from fuel efficiency ...

Also, Newcomen's piston coupling could only move up and down. That was useful for pumping, but limited the engine's application to things that require a rotary motion—grinding, for example.