What is an Engine?

[HarmonyAnn]

Engine is a machine that can convert other forms of energy into mechanical energy. Engine applications: Engines can refer to both power generation devices and complete machines including power units (e.g., gasoline engines, aircraft engines). Engine classification: Automotive engines can be divided into two major categories: gasoline engines and diesel engines. They share the same basic structure, consisting of two major mechanisms and five systems: the crank-connecting rod mechanism, valve train mechanism, fuel supply system, lubrication system, cooling system, ignition system, and starting system. Engine working principle: An engine doesn't rotate spontaneously - it requires an external force to provide initial power, which is supplied by the engine's starting system. During normal operation, the engine's working cycle consists of four piston strokes: intake, compression, power, and exhaust.