Hydraulic control system of automatic transmission for vehicle

Details Hydraulic control system of automatic transmission for vehicle Hydraulic control system of automatic transmission for vehicle

1994-11-30

1996-04-16

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477126, 477131, 477138, 477156, F16H 6126

Patent

active

055077064

ABSTRACT:
A hydraulic control system of the present invention is provided for improving a responsiveness to a speed change by compleating the speed chang with a torque pressure control hydraulic pressure after initiating the speed change with the drive hydraulic pressure. The hydraulic control system includes an oil pump for generating hydraulic pressure, a pressure regulating valve for regulating the hydraulic pressure to be proper pressure for reverse and drive, five friction elements which receive the hydraulic pressure for drive in accordance with operation of a manual valve, two friction elements which receive the hydraulic pressure for reverse in accordance with operation of the manual valve, first and second shift control parts having at least two shift valves, respectively, to supply the hydraulic pressure to the friction elements, and a torque control hydraulic pressure regulating part for supplying a torque control hydraulic pressure to the first and second shift control parts.

REFERENCES:
patent: 4776240 (1988-10-01), Miki
patent: 4870877 (1989-10-01), Hasegawa et al.
patent: 4890515 (1990-01-01), Taniguchi et al.
patent: 5003842 (1991-04-01), Hatta et al.
patent: 5131298 (1992-07-01), Marusue
patent: 5133230 (1992-07-01), Ito et al.
patent: 5337625 (1994-08-01), Jang
patent: 5367922 (1994-11-01), Jan
patent: 5375483 (1994-12-01), Kim et al.

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