Electromagnetic force valve driving apparatus

Details Electromagnetic force valve driving apparatus Electromagnetic force valve driving apparatus

1990-02-15

1991-04-23

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Solenoid having plural coils

25112905, 123 9011, F16K 3106

Patent

active

050093894

ABSTRACT:
An valve driving apparatus includes a freely reciprocatable movable magnetic pole connected to a suction/exhaust valve, a fixed magnetic pole opposing one end of the movable magnetic pole, and a spring biasing the suction/exhaust valve in the closing direction at all times. When the suction/exhaust valve is released, the one end of the movable magnetic pole and the fixed magnetic pole are energized to have the same polarity and the suction/exhaust valve is driven in the opening direction by a repulsive force acting between the two magnetic poles. The suction/exhaust valve is held at a position where the repulsive force and spring force balance each other. The suction/exhaust valve is caused to begin moving in the closing direction by eliminating the repulsive force. The two magnetic poles are excited again immediately before the valve is seated, thereby reducing the traveling speed in the closing direction to mitigate seating shock.

REFERENCES:
patent: 4350319 (1982-09-01), Kawata et al.
patent: 4726389 (1988-02-01), Minoura et al.
patent: 4794890 (1989-01-01), Richeson, Jr.

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