Energization control method, and electromagnetic control system

Details Energization control method, and electromagnetic control system Energization control method, and electromagnetic control system

1997-01-23

1998-09-01

Lee, Kevin

Valves and valve actuation

Electrically actuated valve

Solenoid having plural coils

123 9011, F01L 904

Patent

active

057999260

ABSTRACT:
An electromagnetic driving device includes an armature, a pair of electromagnets disposed in an opposed relation to each other on opposite sides of the armature so as to be able to apply an electromagnetic attracting force to the armature, and a pair of return springs for biasing the armature toward the electromagnets, respectively. In the electromagnetic driving device, the energizing quantity for the electromagnets is varied in accordance with operational conditions. Thus, it is possible to insure the attracting and maintaining of the armature to and on the electromagnets irrespective of changes in operational conditions. In addition, the energizing quantity for the electromagnets is varied in accordance with the distance between the armature and the electromagnets. Thus, it is possible to avoid a wasteful consumption of electric power in the electromagnets to enable a reliable attracting and maintaining of the armature.

REFERENCES:
patent: 4544986 (1985-10-01), Buchi
patent: 4823825 (1989-04-01), Buchi
patent: 4846120 (1989-07-01), Buchi
patent: 5080323 (1992-01-01), Kreuter
patent: 5125370 (1992-06-01), Kawamura
patent: 5222714 (1993-06-01), Morinigo et al.
patent: 5548263 (1996-08-01), Bulgatz et al.
patent: 5669341 (1997-09-01), Ushirono et al.

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