internal-combustion engine[-kəm bus′c̸hən]
an engine, as in an airplane, automobile, etc., that obtains its power from heat and pressure produced by the combustion of a fuel-and-air mixture inside a closed chamber or cylinder
An engine, such as an automotive gasoline piston engine or a diesel, in which fuel is burned within the engine proper rather than in an external furnace, as in a steam engine.
one cycle of a four-stroke diesel engine
A. intake stroke
B. compression stroke
C. power stroke
D. exhaust stroke
(plural internal combustion engines)
- A piston or a rotary heat engine directly powered by the products of intermittent combustion of a fuel.
- A heat engine in which intermittent or the continuous burning of a fuel takes place inside a combustion chamber; the resulting pressurized gas acts directly on the engine to do useful work, such as a piston engine, gas turbine, jet engine or rocket.