Gear shift time automatic adjusting apparatus in automatic trans

Details Gear shift time automatic adjusting apparatus in automatic trans Gear shift time automatic adjusting apparatus in automatic trans

1997-09-18

1999-11-02

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477143, 477154, F16H 6104

Patent

active

059760575

ABSTRACT:
It is detected on the basis of a change in an engine speed whether an out-of shelf condition in which a gear shft time exceeds a predetermined time is caused or not (step S11), and when the out-of shelf condition is caused, a lapping control processing corresponding to first engaging oil pressure setting means is executed so that a correction value is set to increase a line pressure supplied to each kind of engaging elements of an automatic transmission, and that the correction value is decreased as a gear shft load time elapses. At the same time, a learning control processing corresponding to a second engaging oil pressure setting means is executed (step S17) so that a variation of the engaging oil pressure due to the non-uniformity of engaging elements and the deterioration with age is learned, thereby to enable to automatically act a proper line pressure on each kind of engaging elements when either one of the automatic transmission or a controller which controls the automatic transmission is replaced.

REFERENCES:
patent: 4955256 (1990-09-01), Kashihara et al.
patent: 4998451 (1991-03-01), Sano
patent: 5005441 (1991-04-01), Narita
patent: 5163342 (1992-11-01), Pollack et al.
patent: 5558598 (1996-09-01), Torimoto
patent: 5573478 (1996-11-01), Tsukamoto et al.

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