Valve assembly using pressurized medium for controlling...

Details Valve assembly using pressurized medium for controlling... Valve assembly using pressurized medium for controlling...

F - Mech Eng,Light,Heat,Weapons

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F01L 1/38 (2006.01) F01L 7/12 (2006.01) F01L 9/02 (2006.01) F01L 15/02 (2006.01) F02D 45/00 (2006.01) F02B 1/04 (2006.01) F02B 75/02 (2006.01)

Patent

CA 2255022

A valve assembly located adjacent the cylinder structure of a two-stroke engine including a valve piston, a diaphragm and a restricting member. The valve assembly is adapted to vary the height of the exhaust port of this type of engine by moving a restricting member, located in a guide channel communicating with the exhaust port, from a full-flow height position to a restrictive height position (and vice versa) . The force necessary to actuate the restricting member is a pressurized medium or a vacuum. A solenoid valve controls the pressurized medium or vacuum delivery to the valve assembly according to the engine speed N and throttle opening for optimum efficiency.

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