Slip control device of a fluid coupling

Details Slip control device of a fluid coupling Slip control device of a fluid coupling

1990-10-16

1991-10-29

Herrmann, Allan D.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 0052, 192 331, 74890, 475 65, B60K 4128, F16H 4502

Patent

active

050607693

ABSTRACT:
A slip control device of a fluid coupling is mounted in an automatic transmission of the type having a lockup clutch for directly coupling the input side and the output side of the fluid coupling to each other and a hydraulic control circuit for adjusting the locking force of the lockup clutch so as to make the slip of the lockup clutch controllable. The slip control device includes an electric control unit for controlling the hydraulic control circuit so that the locking force of the lockup clutch is set to a predetermined value intermediate between a value corresponding to a complete lockup condition and a value corresponding to a complete release condition during a predetermined period of time. Upon lapse of the predetermined period of time, the locking force of the lockup clutch is reduced temporarily and then increased gradually.

REFERENCES:
patent: 3805640 (1974-04-01), Schneider et al.
patent: 4416358 (1983-11-01), Kapp
patent: 4539869 (1985-09-01), Suga et al.
patent: 4579208 (1986-04-01), Nishikawa et al.
patent: 4633985 (1987-01-01), Leorat
patent: 4781279 (1988-11-01), Georg
patent: 4819777 (1989-04-01), Yasue et al.
patent: 4940122 (1990-07-01), Fujieda
patent: 4989702 (1991-02-01), Yoshimura et al.
patent: 5010990 (1991-04-01), Yoshimura et al.

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