Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid controlled mechanical clutch or brake
Patent
1995-05-30
1996-07-23
Wright, Dirk
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid controlled mechanical clutch or brake
F16H 506
Patent
active
055384790
ABSTRACT:
A changeover valve is provided on an upstream side of solenoid valves for hydraulic engaging elements. The changeover valve is urged to the closed position by the hydraulic oil pressure of a plurality of hydraulic engaging elements which are concerned with the speed changing. At the time of failure in which three or more of the hydraulic engaging elements are simultaneously engaged, the changeover valve is changed over to the closed position to thereby lower the hydraulic oil pressure in the hydraulic engaging elements on the downstream side of the changeover valve, whereby the simultaneous engagement is prevented. In the closed position, a hydraulic oil pressure of a predetermined pressure is inputted to the changeover valve via an oil passage. The chattering of the changeover valve is thus prevented even if the hydraulic oil pressure in the hydraulic engaging elements may be lowered.
REFERENCES:
patent: 5109734 (1992-05-01), Fujiwara
patent: 5305665 (1994-04-01), Sano et al.
Honda Giken Kogyo Kabushiki Kaisha
Wright Dirk
LandOfFree
Control apparatus for hydraulically operated transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control apparatus for hydraulically operated transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control apparatus for hydraulically operated transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-709503