The internal combustion engine is a type of thermal engine in which the combustion of the fuel takes place in the presence of air
inside a combustion chamber. This combustion leads to the expansion of fuel producing high temperature and high pressure, this
high pressure high temperature gas is then used to apply force to some parts of engine. Power is usually applied to a piston, turbine
blade, nozzle or rotor. This force moves that part at a distance, turning chemical energy into useful work.
The term internal combustion engine usually refers to an engine in which the combustion is carried out at irregular intervals, the best
known being the four-stroke and two-stroke piston engines.
