BigPatents India

This is an invention of rotary engine that comprises of a casing, rotor, stoppers, valves and cams. The casing has a cavity and rotor is placed inside it, combustion chamber is placed on the peripheral of the casing. The rotor is rotating circularly around a fixed shaft. Stoppers are used to get the sequence intake, compression, expansion, exhaust without changing the direction of rotor ( without reciprocating motion) or complicated movement of rotor ( like in Wankel engine). Valves are used for intake and exhaust. Intake takes place between intake stopper and lobe of rotor through intake valve. After intake the charge is compressed between lobe and intake stopper and goes into combustion chamber as rotor rotates and completely goes into combustion chamber. And combustion takes place. When lobe crosses the combustion chamber opening expansion takes place between lobe and exhaust stopper and pushes rotor. This is how compression and expansion take place with out changing the rotors rotating direction. After that exhaust take place between exhaust stopper and lobe, through exhaust valve. Constant volume heat addition is achieved by increasing the width of the lobe's end such that it closes the opening of combustion chamber for the time required for complete combustion of charge as lobes end crosses combustion chamber.