Valves and valve actuation – Electrically actuated valve – Solenoid having plural coils
Patent
1990-03-27
1991-12-03
Rosenthal, Arnold
Valves and valve actuation
Electrically actuated valve
Solenoid having plural coils
251 65, 251368, 25112904, 123 9011, F16K 3106, F16K 3108
Patent
active
050694227
ABSTRACT:
A valve electromagnetic force driving apparatus opens the suction/exhaust valve of an engine by an electromagnetic force generated by an electromagnet. A freely reciprocatable movable permanent magnet having at least one pair of magnetic poles arrayed in the direction of reciprocation is connected to the suction/exhaust valve, and fixed magnetic poles opposing the magnetic poles of the movable permanent magnet are provided and similarly arrayed in the direction of reciprocation. The suction/exhaust valve is driven, to open and close the same, by electromagnetic attractive and repulsive forces acting between the magnetic poles of the movable permanent magnet and the fixed magnetic poles. A fixed electromagnet opposing a reciprocating side end face of the suction/exhaust valve is provided and is adapted to subject the valve to a force acting in the opening direction when the valve is opened and closed. The actual operating state of the suction/exhaust valve is sensed, and when the operating state differs from a control command, the suction/exhaust valve is forcibly closed and self-diagnosis is performed.
REFERENCES:
patent: 4254935 (1981-03-01), Jarrett
patent: 4359022 (1982-11-01), Nakamura et al.
patent: 4690371 (1987-09-01), Bosley et al.
patent: 4883025 (1989-11-01), Richeson
Partial English translation of Japanese Patent Publication 57-134089.
Isuzu Ceramics Research Institute Co. Ltd.
Rosenthal Arnold
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