Valve stepping drive apparatus

Details Valve stepping drive apparatus Valve stepping drive apparatus

1990-03-26

1991-01-15

Okonsky, David A.

Internal-combustion engines

Poppet valve operating mechanism

Electrical system

25112901, F01L 904

Patent

active

049845411

ABSTRACT:
A valve stepping drive 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 a 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. 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: 3894275 (1975-07-01), Baumans et al.
patent: 4269388 (1981-03-01), Seilly et al.
patent: 4614170 (1986-09-01), Pischinger et al.
patent: 4779582 (1988-10-01), Lequesne
patent: 4794890 (1989-01-01), Richeson, Jr.
patent: 4867111 (1989-09-01), Schneider et al.
Patent abstract of Japan, 74080, 6/81.

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