Slip control apparatus for motor vehicle lock-up clutch

Details Slip control apparatus for motor vehicle lock-up clutch Slip control apparatus for motor vehicle lock-up clutch

1995-07-12

1997-11-04

Bonck, Rodney H.

Interrelated power delivery controls, including engine control

Clutch control

Condition responsive control

F16H 6114

Patent

active

056833296

ABSTRACT:
An apparatus for controlling a lock-up clutch between pump and turbine impellers in a fluid-filled power transmitting device of a motor vehicle, such that a slip control device controls the actual slip speed of the lock-up clutch so as to coincide with a transient target slip speed, the apparatus including a device for calculating a final target slip speed of the lock-up clutch which assures a maximum fuel economy of the vehicle during a steady-state running, a device for setting, as an initial value of the transient target slip speed, a difference between the speeds of the pump and turbine impellers immediately before an operation of the slip control device is initiated, and a device for reducing the transient target slip speed toward the final target slip speed at a rate which decreases as the transient target slip speed approaches the final target slip speed.

REFERENCES:
patent: 4880094 (1989-11-01), Ohkumo
patent: 5085301 (1992-02-01), Imamura et al.
patent: 5086889 (1992-02-01), Nobumoto et al.
patent: 5086894 (1992-02-01), Iizuka
patent: 5202833 (1993-04-01), Fodale
patent: 5275267 (1994-01-01), Slicker
patent: 5318159 (1994-06-01), Kashiwabara
Patent Abstracts of Japan, vol. 18, No. 227 (M-1597), Apr. 25, 1994, JP-A-60 017921, Jan. 24, 1994.
Patent Abstracts of Japan, vol. 9, No. 67 (M-366), Mar. 27, 1985, JP-A-59 200861, Nov. 14, 1984.
Patent Abstracts of Japan, vol. 9, No. 272 (M-425), Oct. 30, 1985, JP-A-60 116929, Jun. 24, 1985.
Patent Abstracts of Japan, vol. 17, No. 172 (M-1392), Apr. 2, 1993, JP-A-04 331868, Nov. 19, 1992.

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