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What is an Engine Composed of?

1 Answers

MelanieLee

07/29/25 12:23pm

An engine consists of the engine block group, crank-connecting rod mechanism, valve train, fuel supply system, ignition system, cooling system, lubrication system, and starting system. Below are detailed introductions to some of these systems: Crank-Connecting Rod Mechanism: Composed of the engine block group, piston-connecting rod group, and crankshaft-flywheel group. Its function is to convert the thermal energy generated during combustion into the mechanical energy of the piston's reciprocating motion, then transform the piston's reciprocating motion into the rotational motion of the crankshaft to output power externally. Valve Train: The valve train is represented by the opening and closing times of the intake and exhaust valves in terms of crankshaft angle, as well as the duration of their opening. It regularly opens and closes the intake and exhaust valves to allow the combustible mixture to enter the cylinder and exhaust gases to exit the cylinder, achieving the gas exchange process. It consists of the valve group and the valve drive group.

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