Control system for lock-up torque converter for automatic transm

Details Control system for lock-up torque converter for automatic transm Control system for lock-up torque converter for automatic transm

1993-01-25

1994-09-06

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 329, 192 333, 192103F, F16D 3300, B60K 4102

Patent

active

053439902

ABSTRACT:
A control system for a lock-up clutch employed in a lock-up torque converter for an automotive automatic transmission includes a lock-up control valve for controlling a lock-up of the lock-up clutch, a duty-ratio controlled lock-up solenoid, and a control unit for quickly releasing the lock-up clutch at a higher speed based on a controlled duty ratio, when the change-speed operation is performed simultaneously with the lock-up clutch releasing operation.

REFERENCES:
patent: 4640394 (1987-02-01), Higashi et al.
patent: 4664235 (1987-05-01), Yokoyama et al.
patent: 4676353 (1987-06-01), Matsuda
patent: 4803901 (1989-02-01), Hamano et al.
patent: 4940122 (1990-07-01), Fujieda
patent: 4989702 (1991-01-01), Yoshimura et al.
patent: 5010990 (1991-04-01), Yoshimura et al.
patent: 5058716 (1991-10-01), Lippe et al.
patent: 5060769 (1991-10-01), Yoshimura et al.
patent: 5090527 (1992-02-01), Imamura et al.

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