Internal-combustion engine | Definition & Facts | Britannica
https://www.britannica.com/technology/internal-combustion-engine
WebInternal-combustion engine, any of a group of devices in which combustion’s reactants (oxidizer and fuel) and products serve as the engine’s working fluids. Work results from the hot gaseous combustion products acting on the engine’s moving surfaces, such as the face of a piston, a turbine blade, or a nozzle.
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