Control system of automatic transmission

Details Control system of automatic transmission Control system of automatic transmission

1994-05-25

1998-11-24

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477155, 477156, 477176, F16H 6104

Patent

active

058399887

ABSTRACT:
A control system of an automatic transmission includes a torque converter, a lock-up clutch for directly connecting input and output members of the torque converter, a pressure control valve which changes a hydraulic pressure to control an engaging force of the lock-up clutch, and a pressure regulator, disposed in an engaging passage, which supplies hydraulic pressure to engage a frictional element. The pressure regulator adjusts a primary pressure and produces an output hydraulic pressure corresponding to a control pressure introduced into a control port of the pressure regulator. A control pressure supply device is provided for introducing the control pressure, controlled by the pressure control valve, into the control port of the pressure regulator. The number of parts can be reduced without producing any inconvenience.

REFERENCES:
patent: 5014575 (1991-05-01), Fujiwara et al.
patent: 5361651 (1994-11-01), Wakahara

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