High-efficiency hybrid cycle

Thermodynamics
The classical Carnot heat engine
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The high-efficiency hybrid cycle (HEHC) is a new 4-stroke thermodynamic cycle combining elements of the Otto cycle, Diesel cycle, Atkinson cycle and Rankine cycle.^[1]

The 3rd generation design of the Liquidpiston Engine currently in development is the only engine currently designed around the HEHC. It is a rotary combustion engine.^[2]

• LiquidPiston Inc. – The company designing the first HEHC-based engine
• MIT News article: "Small engine packs a punch" (December 5, 2014)

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