The high-efficiency hybrid cycle (HEHC) is a new

4-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...

thermodynamic cycle A thermodynamic cycle consists of a linked sequence of thermodynamic processes that involve transfer of heat and work into and out of the system, while varying pressure, temperature, and other state variables within the system, and that eventu ...

combining elements of the

Otto cycle An Otto cycle is an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine. It is the thermodynamic cycle most commonly found in automobile engines. The Otto cycle is a description of what ha ...

Diesel cycle The Diesel cycle is a combustion process of a reciprocating internal combustion engine. In it, fuel is ignited by heat generated during the compression of air in the combustion chamber, into which fuel is then injected. This is in contrast to ign ...

Atkinson cycle The Atkinson-cycle engine is a type of internal combustion engine invented by James Atkinson in 1882. The Atkinson cycle is designed to provide efficiency at the expense of power density. A variation of this approach is used in some modern au ...

and

Rankine cycle The Rankine cycle is an idealized thermodynamic cycle describing the process by which certain heat engines, such as steam turbines or reciprocating steam engines, allow mechanical work to be extracted from a fluid as it moves between a heat sou ...

HEHC engines

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 A pistonless rotary engine is an internal combustion engine that does not use pistons in the way a reciprocating engine does. Designs vary widely but typically involve one or more rotors, sometimes called rotary pistons. Although many different ...

.How Our Rotary Engine Works , LiquidPiston
!-- was: http://www.liquidpiston.com/TechnologyLP.asp LiquidPiston Engine Technology-->

References

External links

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