Reference Terms
from Wikipedia, the free encyclopedia

Internal combustion engine

The internal combustion engine is a heat engine in which combustion occurs in a confined space called a combustion chamber.

Combustion of a fuel creates high temperature/pressure gases, which are permitted to expand.

The expanding gases are used to directly move a piston, turbine blades, rotor(s), or the engine itself thus doing useful work.

Internal combustion engines can be powered by any fuel that can be combined with an oxidizer in the chamber.

Note:   The above text is excerpted from the Wikipedia article "Internal combustion engine", which has been released under the GNU Free Documentation License.
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