What principle does an engine operate on?
1 Answers
Engine working principle is the ability to convert other forms of energy into mechanical energy. Two-stroke and four-stroke engines operate on different principles, with the majority of automotive engines being four-stroke. The working cycle of a four-stroke gasoline engine consists of four piston strokes: intake stroke, compression stroke, power stroke, and exhaust stroke. A four-stroke gasoline engine mixes air and gasoline in a certain proportion to form a good combustible mixture, which is drawn into the cylinder during the intake stroke. The compressed mixture ignites and burns to generate thermal energy, and the high-temperature, high-pressure gas acts on the top of the piston, pushing the piston to perform reciprocating linear motion. Mechanical energy is then output externally through the connecting rod and crankshaft flywheel mechanism. A four-stroke diesel engine compresses air to generate high heat, then injects atomized diesel fuel which explodes and expands, with the pressure directly acting on the piston to drive it in high-speed, non-uniform linear reciprocating motion along the cylinder. The crank-connecting rod mechanism, composed of components such as the piston pin, connecting rod, and crankshaft, converts the linear motion of the piston into the rotational motion of the crankshaft, thereby outputting mechanical work.
