Air powered valve actuator

Details Air powered valve actuator Air powered valve actuator

1989-01-06

1989-10-10

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123 9014, 13762564, F01L 902

Patent

active

048724254

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 direct pneumatic pressure to drive the piston. The control valves are magnetically latched in closed positions with magnet force and released after a temporary electromagnetic weakening of the magnetic field. Upon release, the valves are opened pneumatically and closed pneumatically.

REFERENCES:
patent: 2552960 (1951-05-01), Geieshaber et al.
patent: 3727595 (1973-04-01), Links
patent: 3738337 (1973-06-01), Massie
patent: 4074699 (1978-02-01), Stampfli
patent: 4257573 (1981-03-01), Stampfli
patent: 4605197 (1986-08-01), Casey et al.

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