Shift control apparatus of automatic transmission

Details Shift control apparatus of automatic transmission Shift control apparatus of automatic transmission

1998-02-18

1999-08-17

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

475120, F16H 6108

Patent

active

059385634

ABSTRACT:
A shift control apparatus of an automatic transmission executes a transient control of an engagement pressure of a first speed selecting friction element when a first speed is selected after a higher speed is once selected during a change from a neutral range to a forward drive range. A band brake pressure for selecting the second speed is rapidly increased at a first moment. A forward clutch pressure for selecting the first speed is increased at a second moment delaying to the first moment by a predetermined period adjusted to a line pressure lowered period. The forward clutch pressure is pre-charged during a period between the first and second moments, then being hold for a preset time period at a return spring corresponding pressure adjusted by a leaning control, and being increased by a slope adjusted by the leaning control for a predetermined period to establish the second speed by the engagement of the forward clutch. Then, the band brake pressure is rapidly decreased and further decreased by a slope to disengage the band brake in order to establish the first speed.

REFERENCES:
patent: 4957015 (1990-09-01), Ishikawa et al.
patent: 4982622 (1991-01-01), Yamamoto et al.
patent: 5094128 (1992-03-01), Kamada
patent: 5797821 (1998-08-01), Fujimoto et al.
patent: 5807207 (1998-09-01), Hisano et al.
Extraction of "Service Manual of Automatic Transmission Of Type RE4R01A" published by Nissa Motor Co., Ltd., 1987, pp. 1-5-1-8.

Affiliated with

Also associated with

Rating

Shift control apparatus of automatic transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Shift control apparatus of automatic transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shift control apparatus of automatic transmission will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-309476