Hydraulic control systems for an automatic transmission

Details Hydraulic control systems for an automatic transmission Hydraulic control systems for an automatic transmission

1997-10-15

2000-02-22

Marmor, Charles A

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477906, F16H 6126

Patent

active

060274271

ABSTRACT:
A hydraulic control system for an automatic transmission includes a pressure regulator for regulating hydraulic pressure produced in an oil pump, and a plurality of valves selectively supplying the regulated hydraulic pressure to a first number of friction elements. A second number of solenoid valves controls operation of the first number of friction elements by controlling supply of the regulated hydraulic pressure to the plurality of valves; wherein the second number is less than the first number. A manual valve controls supply of the regulated pressure to the second number of solenoid valves.

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