Controlled capacity torque converter clutch lock-up transition c

Details Controlled capacity torque converter clutch lock-up transition c Controlled capacity torque converter clutch lock-up transition c

1994-09-02

1996-07-02

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 331, 477 65, 477176, F16H 4502, B60K 4102

Patent

active

055313027

ABSTRACT:
A torque converter clutch control provides for a controlled capacity mode of operation wherein clutch slip is controlled to a reference value. A lock mode is also provided wherein clutch slip is eliminated. The transition from the controlled capacity mode to the lock mode is caused to occur when clutch slip is stabilized by increasing clutch engagement force by an amount sufficient to smoothly reduce slip speed to zero and thereafter maintain zero slip. The increase in engagement force is marginally sufficient to maintain slip at zero thereby allowing engine torque excursions to be absorbed by allowing slip during such excursions. Transitions back to the controlled capacity mode are adapted to current torque and slip conditions.

REFERENCES:
patent: 4664235 (1987-05-01), Yokoyama et al.
patent: 4706790 (1987-11-01), Lockhart et al.
patent: 4940122 (1990-07-01), Fujieda
patent: 4989702 (1991-02-01), Yoshimura et al.
patent: 4998604 (1991-03-01), Vukovich et al.

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