Interrelated power delivery controls – including engine control – Transmission control – With brake control
Patent
1995-04-25
1997-05-20
Marmor, Charles A.
Interrelated power delivery controls, including engine control
Transmission control
With brake control
477 93, 477 79, 477194, 475120, B60K 4120
Patent
active
056307721
ABSTRACT:
A system and method for controlling an automatic transmission in a vehicle drive train including an engine, the automatic transmission and a fluid coupling for transmitting the rotation of the engine to the transmission. The transmission includes a clutch applied when a forward running range is selected; a second one-way clutch which is applied, when the first clutch is applied, to establish a forward 1st speed; and a brake for locking the one-way clutch, when applied, to block the reverse rotation of the output shaft of the transmission. A first hydraulic servo receives a first oil pressure for applying the first clutch and a second hydraulic servo receives a second oil pressure for applying the brake. When a forward running range is selected, with the vehicle stopped, the engine idling and a foot brake engaged, the oil pressure of the first hydraulic servo is lowered from the oil pressure at the 1st speed whereas the oil pressure of the second hydraulic servo is raised to a modulated pressure. The modulated pressure is set to generate, against the reverse force on the vehicle facing up an incline, a resistance corresponding to the forward driving force generated when the engine is idling in 1st speed.
REFERENCES:
patent: 4513639 (1985-04-01), Hiramatsu
patent: 4644826 (1987-02-01), Kubo et all.
patent: 4648289 (1987-03-01), Kubo et al.
patent: 4650046 (1987-03-01), Parsons
patent: 4879925 (1989-11-01), Taga et al.
patent: 4991464 (1991-02-01), Ishikawa et al.
patent: 5211082 (1993-05-01), Sasaki et al.
patent: 5213013 (1993-05-01), Funiwara et al.
patent: 5334114 (1994-08-01), Ando et al.
patent: 5368531 (1994-11-01), Ando et al.
Hayabuchi Masahiro
Iwata Akihito
Kusafuka Muneo
Nishida Masaaki
Tsukamoto Kazumasa
Aisin Aw Co. Ltd.
Kwon Peter T.
Marmor Charles A.
LandOfFree
Control method and 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 method and control system for automatic transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control method and control system for automatic transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1720595