Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1997-10-03
1999-03-30
Marmor, Charles A.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477 62, 477131, 477158, 477906, 475128, F16H 6126
Patent
active
058881697
ABSTRACT:
The hydraulic control system for an automatic transmission having a plurality of friction elements includes a pressure regulator which regulates hydraulic pressure produced by an oil pump, a plurality of valves selectively supplying hydraulic pressure to the plurality of friction elements, and a pressure controller controlling and selectively supplying hydraulic pressure to a plurality of pressure control lines operationally connected to the plurality of valves and at least one of the plurality of valves. The plurality of valves include a first valve operationally controlled by hydraulic pressure in a first one of the pressure control lines to pass the hydraulic pressure output by the pressure controller to at least one of the plurality of friction elements in each operational range except a first speed stage of a drive range. A second valve is operationally controlled by hydraulic pressure in a second one and third one of the pressure control lines to selectively pass the hydraulic pressure output from the first valve to a first and second friction element in the drive range. A control switch valve in the plurality of valves is operationally controlled by a fourth one of the pressure control lines to selectively supply hydraulic pressure from at least one of the first and second pressure control lines and the first valve to the second friction element in second, third and fourth speed stages of the drive range, and to a third friction element in the third and fourth speed stages, of the drive range.
REFERENCES:
patent: 4896568 (1990-01-01), Gierer
patent: 5669853 (1997-09-01), Jang
patent: 5674152 (1997-10-01), Lee
patent: 5690574 (1997-11-01), Jang
Estremsky Sherry Lynn
Hyundai Motor Company
Marmor Charles A.
LandOfFree
Hydraulic control system for automatic transmissions used in veh does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic control system for automatic transmissions used in veh, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic control system for automatic transmissions used in veh will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1209498