Two-Stroke and Four-Stroke cycle Engines

Two-Stroke and Four-Stroke cycle Engines Points : Two-Stroke and Four-Stroke cycle Engines. In a two-stroke engine, the working cycle is completed in two stroke of the piston or one revolution of crankshaft. This is achieved by carrying out he suction and compression processes in one stroke (or more precisely in inward stroke), expansion and exhaust processes in the second stroke (or more precisely in outward stroke); In a four-stroke engine, the working cycle is completed in four- strokes of the piston or two revolutions of the crankshaft. This is achieved by carrying out suction, compression, expansion and exhaust process in each stroke.
It will be interesting to know that from the thermodynamic point of view there is no difference between two-stroke and four-stroke cycle engines. The difference is purely mechanical.