How 2 Stroke Engine Works

In two-stroke engines the cycle is completed in two strokes, i.e., one revolution of the crankshaft as against two revolutions of four-stroke cycle. The difference between two-stroke and four-stroke engines is in the method of filling the cylinder with the fresh charge and removing the burned gases from the cylinder. 

In a four-stroke engine the operations are performed by the engine piston during the suction and exhaust strokes, respectively. In a two stroke engine suction is accomplished by air compressed in crankcase or by a blower. 

The induction of compressed air removes the products of combustion, through exhaust ports. Therefore no piston strokes are required for suction and exhaust operations. Only two piston strokes are required to complete the cycle, one for compressing the fresh charge and the other for expansion or power stroke....

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