An engine or motor is a machine designed to convert energy into
useful mechanical motion. Heat engines, including internal
combustion engines and external combustion engines (such as steam
engines) burn a fuel to create heat, which then creates motion.
Electric motors convert electrical energy into mechanical motion,
pneumatic motors use compressed air and others—such as clockwork
motors in wind-up toys—use elastic energy. In biological systems,
molecular motors, like myosins in muscles, use chemical energy to
create motion.
To improve product quality, the spec mentioned above could be
changed and fuel consumption may be changed according to an
operation.
