Control device and a method for controlling and resetting a lock

Details Control device and a method for controlling and resetting a lock Control device and a method for controlling and resetting a lock

1994-08-31

1996-03-05

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Clutch control

With fluid drive

477 64, 477175, 477180, B60K 2000, F16H 4502

Patent

active

054962331

ABSTRACT:
A locking-up hydraulic pressure control device of an automatic transmission comprises a memory, a controller, a second memory, and a time schedule management. The memory stores a hydraulic pressure control time schedule from the beginning of shift operation to the end. The controller means controls a locking-up hydraulic pressure in accordance with said hydraulic pressure control time schedule to be provided to a lock-up clutch that mechanically connects and disconnects a pump impeller of a torque converter of said automatic transmission connected to an engine and a turbine runner connected to transmission gears. The second memory stores a time schedule of engine revolution during a shift operation. The time schedule management means resets said hydraulic pressure control time schedule higher pressures than the former pressures in case if engine revolution exceeds said time schedule of engine revolution during the shift operation by a certain given limit.

REFERENCES:
patent: 5047936 (1991-09-01), Ishii et al.
patent: 5060769 (1991-10-01), Yoshimura et al.
patent: 5063814 (1991-11-01), Baba et al.
patent: 5086666 (1992-02-01), Moriki
patent: 5086894 (1992-02-01), Iizuka et al.
patent: 5332073 (1994-07-01), Iizuka

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