Slip control system for torque converter of automatic transmissi

Details Slip control system for torque converter of automatic transmissi Slip control system for torque converter of automatic transmissi

1989-02-14

1990-07-10

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 0032, 192 0096, 192 33, B60K 4116

Patent

active

049401220

ABSTRACT:
A slip control system of a lock-up clutch of an automatic transmission comprising a torque converter, lock-up clutch, slip control device for controlling an engaging force of the lock-up clutch to establish a slip control in which a predetermined rotation speed difference is allowed between the input member and output member when a vehicle operating condition is in a predetermined slip control zone, transient control device for carrying out a transient control by setting a transient control factor to increase a change in the engaging force of the lock-up clutch for a transient condition when the vehicle operating condition is transferred from a non-slip control zone to the slip control zone, and the transient control factor being determined in accordance with a vehicle operating condition just before the vehicle operating condition falls into the slip control zone. The slip control system reduces a torque shock in a change between the non-slip control condition and the slip control condition and at the same time accomplishes a responsive slip control.

REFERENCES:
patent: 4468988 (1984-09-01), Hiramatsu
patent: 4580671 (1986-04-01), Matsuoka et al.
patent: 4618041 (1986-10-01), Sotoyama et al.
patent: 4640394 (1987-02-01), Higashi et al.
patent: 4669441 (1987-06-01), Okimoto
patent: 4687083 (1987-08-01), Sotoyama et al.
patent: 4766544 (1988-08-01), Kurihara et al.

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