Engine
From Encyclopædia
An engine is a device that converts one of several forms of energy into mechanical energy, which may then be used to perform work. Most modern engines use heat energy, derived from the
combustion of fuels such as oil, coal, or gas. Other types of engines convert air or water
pressure into mechanical energy. Engine types are described in separate articles: DIESEL ENGINE; HEAT ENGINE; INTERNAL
combustion ENGINE;
jet propulsion; MOTOR;
Stirling ENGINE; TURBINE; WANKEL ENGINE. Older forms of energy
conversion are the WATERWHEEL and windmill (see
WINDMILLS AND WINDPOWER). New methods of energy
conversion that bypass the mechanical
stage are discussed in
generation and transmission of power.
