Engine classification

For two-stroke engines engines and four-stroke engines
Two-stroke engines: Where every one rotation of the engine crankshaft, namely two vertical reciprocating movement of the piston stroke and complete a work cycle of the engine. wave110 cub motorcycle engine Four-stroke engines: Where the engine crankshaft rotation every two revolutions, the vertical reciprocating movement of the piston stroke and four cycle engine to complete a job. Duty cycle refers to the engine by the intake, compression, combustion and expansion work process (acting), consisting of the exhaust stroke. Engine complete a intake, compression, acting, exhaust process is called a work cycle, also known as a cycle.