*Engine with a rotating piston with, only in one part of the power stroke, is a connection to a fixed combustion chamber with permanent combustion.
Chemical -> heat -> flow
Motion energy = kinetic energy
The combustion engine should efficiently transform the chemical energy found in the fuel, and producing as little exhaust pollution as possible, into kinetic energy. The invention of the internal combustion engine decisively influenced the development of the motor vehicle.
A fuel-air mixture is ignited - except in case of a fuel-cell - in a combustion chamber. The resulting pressure is transferred through a stroke movement or directly into a rotary movement and is passed on to the engine as torque. The fuel-cell first converts the chemical energy into electric energy, which is subsequently delivered through the electric motor(s).
One differentiates between engines with external- (exothermic) and internal (endothermic) combustion. Among those in the first group are, e.g., the steam engine and the Stirling engine. All the others are found in the second group, among them are the motor-vehicle internal combustion engine and the jet-engine. In addition, one distinguishes - as one does with pumps - between through-flow- and displacement engines. E.g., the gas turbines belong in the first group, whereas all the other engines known to us, belong in the second group, including the rotary-piston engines (Wankel-engines). 02/09
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