Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid controlled mechanical clutch or brake
Patent
1996-07-17
1998-03-10
Wright, Dirk
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid controlled mechanical clutch or brake
F16H 6100
Patent
active
057254516
ABSTRACT:
A control system for use in an automatic transmission which includes a gear shift mechanism having first and second frictional engagement elements for establishing: a first gear stage with the first frictional engagement element being applied and the second frictional engagement element being released; and a second gear stage with the first frictional engagement element being released and the second frictional engagement element being applied. The control system, in turn, includes: a first oil passage for feeding an oil pressure to the first frictional engagement element; a second oil passage for feeding an oil pressure to the second frictional engagement element; and a first valve arranged in the first oil passage for regulating the oil pressure of the first oil passage. At the time of a shift from the first gear stage to the second gear stage, the oil pressure of the first oil passage is regulated by the first valve responsive to the oil pressure of the second oil passage. The control system further includes a second valve arranged in the first oil passage for selectively feeding or shutting off the oil pressure of the first oil passage to and from the first frictional engagement element.
REFERENCES:
patent: 4718311 (1988-01-01), Hayakawa et al.
patent: 4982624 (1991-01-01), Takada et al.
patent: 5109734 (1992-05-01), Fujiwara
patent: 5133231 (1992-07-01), Goto et al.
patent: 5203234 (1993-04-01), Asada et al.
patent: 5291804 (1994-03-01), Kashihara et al.
patent: 5293789 (1994-03-01), Goto et al.
patent: 5363724 (1994-11-01), Asahara et al.
patent: 5403248 (1995-04-01), Ando et al.
patent: 5411446 (1995-05-01), Hirose
patent: 5433124 (1995-07-01), Person
patent: 5472389 (1995-12-01), Ando et al.
patent: 5501645 (1996-03-01), Taniguchi et al.
patent: 5505673 (1996-04-01), Tsukamoto et al.
Ando Masahiko
Fukatsu Akira
Fukumura Kagenori
Hayabuchi Masahiro
Hojo Yasuo
Aisin Aw Co. Ltd.
Wright Dirk
LandOfFree
Control system for automatic 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 system for automatic transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system for automatic transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-134574