What Systems Make Up an Engine?

1 Answers
StAdalynn
07/29/25 10:45pm
An engine consists of two major mechanisms and five systems, namely the crank-connecting rod mechanism, valve train, fuel supply system, lubrication system, cooling system, ignition system, and starting system. The crank-connecting rod mechanism is the main moving component that enables the engine to complete its working cycle and achieve energy conversion. It is composed of the cylinder block group, piston-connecting rod group, and crankshaft-flywheel group. The function of the valve train is to open and close the intake and exhaust valves according to the engine's working sequence and process, allowing the combustible mixture or air to enter the cylinder and exhaust gases to be expelled from the cylinder, thereby achieving the gas exchange process. An engine is a machine capable of converting other forms of energy into mechanical energy. It can refer to either the power generation device or the entire machine including the power unit.
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