System and method for controlling hydraulic pressure of...

Details System and method for controlling hydraulic pressure of... System and method for controlling hydraulic pressure of...

2006-04-18

2006-04-18

Bonck, Rodney H. (Department: 3681)

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

C477S062000

Reexamination Certificate

active

07028821

ABSTRACT:
A system for controlling a hydraulic pressure of an automatic transmission includes a torque converter having a lockup clutch for direct coupling between an engine and the transmission, a lockup solenoid valve for providing a signal pressure for controlling engagement of the lockup clutch, a lockup control valve for providing an engagement pressure to the lockup clutch in accordance with the signal pressure, and a CVT control unit for controlling the lockup solenoid valve. The CVT control unit is programmed to determine torque provided to the torque converter and control the signal pressure in accordance with the torque.

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