Engine valve-driving electromagnetic valve

Details Engine valve-driving electromagnetic valve Engine valve-driving electromagnetic valve

1999-03-03

2000-04-11

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Electrical system

25112901, F01L 904, H01F 716

Patent

active

060476729

ABSTRACT:
A method of driving an engine valve-driving electromagnetic valve, wherein a permanent magnet is provided in a movable element of the electromagnetic valve, and springs are omitted, and wherein repulsion and attraction electric currents are varied according to the engine speed, thereby reducing the electric power consumption. The permanent magnet is magnetized in the axial direction. When the repulsion current is passed through one exciting coil, the attraction current is passed through the other exciting coil, thereby moving an engine valve to an open position. When the attraction current is passed through the one exciting coil, the repulsion current is passed through the other exciting coil, thereby moving the engine valve to a closed position. In the low-engine speed region, the current value is smaller and the energization time is longer than in the high-engine speed region.

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Patent Abstracts of Japan 07083012 A dated Mar. 28, 1995.
Patent Abstracts of Japan 08205508 A dated Aug. 9, 1996.
English Language Abstract of JP 5-87267 dated Apr. 6, 1993.

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