What are the two major mechanisms and five major systems of an engine?
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Engine's two major mechanisms and five major systems are: crank-connecting rod mechanism, valve train mechanism, as well as fuel supply system, lubrication system, cooling system, ignition system and starting system. The automobile engine is the device that provides power for the vehicle, determining its power performance, fuel economy, stability and environmental friendliness. According to different power sources, automobile engines can be divided into diesel engines, gasoline engines, electric vehicle motors and hybrid power. Common gasoline and diesel engines belong to reciprocating piston internal combustion engines, which convert the chemical energy of fuel into the mechanical energy of piston movement to output power.