The rotary engine was first invented by Wankle in 1936 in Germany. This internal combustion engine is driven by a triangular rotor, turning on an eccentric axle in a two -lobed epitro - chid combustion chamber (see fig. )
A mixture of air and fuel is drawn in, comeressed , ignited and expelled with far fewer moving parts than in a conventional I. C. engine Since the rotor has three sections (Corresponding to three cylinders) , there are three power strokes per rotor revolution.
The Wankel Rotary Engine is a marvel of simplicity. Instead of pistons with complicated valves to let in air and fuel and let out exhaust the rotary engine is powered by a pump, triangular revolving in the housing. As Ignited fuel expands against one side of the rotor, forcing it to turn, another side is pushing out exhaust gases and the third side is compressing fresh charge.
The rotor sides thems elves take the place of valves, blocking and then opening the intake and exhaust parts as the rotor revolves around. By producing rotary motion directly the engine eliminates the need for the complicated and bulky mechanisms that translate the up and down motion of conventional pistons into the revolving force needed to drive a car's wheels.
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