Electronically controlled automatic transmission

Details Electronically controlled automatic transmission Electronically controlled automatic transmission

1990-09-17

1992-01-28

Braun, Leslie A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74866, B60K 4106

Patent

active

050834819

ABSTRACT:
An automatic transmission control system for an automotive vehicle comprising fluid pressure operated clutch and brake servos that establish and disestablish plural torque delivery paths between the engine of the vehicle and a driven member, the control system having a pressure regulator for maintaining an optimum pressure level, a throttle solenoid valve, ratio shift controlling solenoid valves and means for replacing the functions of the throttle solenoid valve and the shift controlling solenoid valves in the event that a control voltage failure or a valve malfunction should occur.

REFERENCES:
patent: 3840039 (1974-10-01), Shellman
patent: 3893472 (1975-07-01), Schuster
patent: 4331046 (1982-05-01), Leonard et al.
patent: 4494423 (1985-01-01), McCarthy et al.
patent: 4506564 (1985-03-01), Coutant
patent: 4509389 (1985-04-01), Vahratian et al.
patent: 4637281 (1987-01-01), Vanselous
patent: 4903551 (1990-02-01), Hiramatsu et al.

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