Enhanced efficiency valve actuator

Details Enhanced efficiency valve actuator Enhanced efficiency valve actuator

F - Mech Eng,Light,Heat,Weapons

15

B

123/187, 342/24,

F15B 15/14 (2006.01) F01L 3/24 (2006.01) F01L 9/02 (2006.01) F01L 9/04 (2006.01)

Patent

CA 2007087

PHA 40.554 30-06-1989 ABSTRACT A bistable electronically controlled fluid powered valve actuator for use in an internal combustion engine of the type having engine intake and exhaust valves has a piston reciprocative in a cylinder housing for driving the engine valves to open and close. Control valves are mounted separately from the piston for reciprocative movement in the housing and are used to selectively direct air pressure to drive the piston. The control valves are magnetically latched in closed positions with the magnet force used to also close ends of the valves. Abutments are affixed to ends of the piston shaft to aid the control valves in their closing movements, especially if the valves have a transitory retardation; another aid to valve closing movement is the capture of air in a chamber that is sealed on opening valve movement so that the compression of air in the chamber acts as an air spring to aid in the valve closing movements.

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