Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Patent
1990-01-09
1990-11-06
Okonsky, David A.
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
123 9017, 123 9031, F01l 904, F01l 134
Patent
active
049677012
ABSTRACT:
A valve timing adjuster according to the present invention, comprises a pulley rotationally connected to one of an output shaft of engine and a cam shaft, a sleeve which is supported on the pulley, which is rotatable within a predetermined angle of rotation on the pulley and which is rotationally connected to the other one of the output shaft of engine and the cam shaft, an electromagnet mounted on one of the pulley and the sleeve, an armature mounted on the other one of the pulley and the sleeve so that magnetic flux including a magnetic flux component extending in the circumferential direction of the valve timing adjuster is generated, the armature is drawn by the magnetic flux toward the electromagnet and the sleeve is rotated within the predetermined angle of rotation on the pulley when the electromagnet is energized, and a control device which controls the operation of electromagnet so that the phase difference between the cam shaft and the output shaft is suitably adjusted during operation of a vehicle. Since the valve timing adjuster according to the present invention does not need means for converting an axial movement of the pulley to a circumferential or rotational movement thereof, does not have many friction regions and does not have the hydraulically-operated actuator and the hydraulic pipe lines, the durability and response speed are increased and the cost of modification of engine is not needed.
REFERENCES:
patent: 3978829 (1976-09-01), Takahashi et al.
patent: 4231330 (1980-11-01), Garcea
patent: 4305352 (1981-12-01), Oshima et al.
patent: 4452188 (1984-06-01), Kosuda et al.
patent: 4494496 (1985-01-01), Nakamura et al.
patent: 4561390 (1985-12-01), Nakamura et al.
patent: 4754727 (1988-07-01), Hampton
patent: 4825992 (1989-05-01), Skrobisch
Ishida Shinji
Isogai Kimiyoshi
Nishi Toshinobu
Sato Hidenori
Yamada Kenji
Lo Weilun
Nippondenso Co. Ltd.
Okonsky David A.
LandOfFree
Valve timing adjuster does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Valve timing adjuster, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve timing adjuster will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1300850