Lock-up control method of automatic transmission

Details Lock-up control method of automatic transmission Lock-up control method of automatic transmission

1998-12-01

2000-06-20

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Including fluid drive

477 78, F16H 6114

Patent

active

060771887

ABSTRACT:
A lock-up control method of an automatic transmission for making the optimum lock-up control correspond to a shift control. In the lock-up control method of the automatic transmission in which the fastening force of a lock-up clutch is temporarily dropped to cause the lock-up clutch to slip in shifting the automatic transmission, the maximum value of a rate of change of speed of an input element is found while shifting the automatic transmission, the fastening force of the lock-up clutch is corrected so that a deviation between the maximum value and a target rate of change of speed of the input element is zeroed and the lock-up clutch is fastened by the corrected fastening force in the next shift.

REFERENCES:
patent: 4953091 (1990-08-01), Baltusis et al.
patent: 5010990 (1991-04-01), Yoshimura et al.
patent: 5035308 (1991-07-01), Baba et al.
patent: 5291979 (1994-03-01), Iizuka
patent: 5573473 (1996-11-01), Asayama et al.
patent: 5580331 (1996-12-01), Shiraishi et al.
patent: 5722912 (1998-03-01), Narita
patent: 5733223 (1998-03-01), Matsubara et al.
patent: 5807209 (1998-09-01), Matsubara et al.

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