Internal Combustion Engine, a heat engine in which the fuel is burned (
that is, united with oxygen ) within the confining space of the engine itself.
This burning process releases large amounts of energy, which are transformed
into work through the mechanism of the engine. This type of engine different
from the steam engine, which process with an external combustion engine that
fuel burned apart from the engine. The principal types of internal combustion
engine are : reciprocating engine such as Otto-engine, and Diesel engines ; and
rotary engines, such as the Wankel engine and the Gas-turbine engine.
In general, the internal combustion engine has become the means of
propulsion in the transportation field, with the exception of large ships
requiring over 4,000 shaft horsepower ( hp).
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