IC ENGINE

      INTERNAL COMBUSTION ENGINE

The internal combustion engine is a heat engine that converts heat energy (chemical energy of fuel) into mechanical energy (usually made available on a rotating output shaft)

Internal-combustion engine, any of a group of devices in which the reactants of combustion (oxidizer and fuel) and the products of combustion serve as the working fluids of the engine. Such an engine gains its energy from heat released during the combustion of the nonreacted working fluids, the oxidizer-fuel mixture.