Title:
【発明の名称】電磁力駆動バルブ制御装置
Document Type and Number:
Japanese Patent JP2688953
Kind Code:
B2
Abstract:
An electromagnetic valve control system includes electromagnets having fixed magnetic poles facing opposite end surfaces of a reciprocally movable magnetic plate which is coupled to each of intake and exhaust valves. The intake and exhaust valves can be opened and closed under electromagnetic attractive forces produced by energizing the electromagnets. When the rotational speed of an engine incorporating the electromagnetic valve control system is lower than a predetermined speed, the intake and exhaust valves are opened and closed at a timing close to the top dead center and the bottom dead center of an engine cylinder associated with the intake and exhaust valves. The speeds of flow of intake air and exhaust gases are detected, and when the rotational speed of the engine is higher than the predetermined speed, the timing of closing the intake and exhaust valves is modified such that the intake and exhaust valves will be closed at the time the speeds of flow of intake air and exhaust gases become zero.
Inventors:
Kawamura Hideo
Application Number:
JP28537388A
Publication Date:
December 10, 1997
Filing Date:
November 11, 1988
Export Citation:
Assignee:
Isuzu Ceramics Laboratory Co., Ltd.
International Classes:
F01L9/20; F02D13/02; F02D45/00; (IPC1-7): F01L9/04; F02D45/00
Domestic Patent References:
| JP6198914A | ||||
| JP5990718A | ||||
| JP6082507U | ||||
| JP6387208U |
Attorney, Agent or Firm:
Minoru Tsuji