Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1997-08-28
1999-09-14
Bonck, Rodney H.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477131, 477132, 477143, 475128, F16H 5920
Patent
active
059514396
ABSTRACT:
Disclosed is a hydraulic control system used in an automatic transmission for a vehicle which includes a plurality of friction elements associated with respective transmission speeds, a hydraulic pressure source, a hydraulic pressure regulating controller for controlling hydraulic pressure from the hydraulic pressure source to constant line pressure, a damper clutch controller for actuating a damper clutch of the torque converter by supplying hydraulic pressure fed from the pressure regulating controller to the torque converter, shift controller for selecting a shift mode by converting hydraulic pressure from the pressure regulating controller into drive pressure corresponding to each speed stage, a hydraulic pressure controller for controlling the drive pressure from the shift controller, and a hydraulic pressure distributor for suitably distributing hydraulic pressure from the hydraulic pressure controller to each friction element for each speed, wherein the hydraulic pressure distributor includes a shift timing control valve for supplying drive pressure to each friction element for second and fourth speeds, and a solenoid valve for controlling hydraulic pressure supply timing to said each friction element for the second and fourth speeds by exhausting control pressure for controlling the shift timing control valve in the fourth speed.
REFERENCES:
patent: 4607542 (1986-08-01), Sugano
patent: 5027676 (1991-07-01), Fujiwara et al.
patent: 5090271 (1992-02-01), Hayasaki
patent: 5117712 (1992-06-01), Goto et al.
patent: 5184528 (1993-02-01), Mochizuki
Bonck Rodney H.
Hyundai Motor Company
Parekh Ankur
LandOfFree
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