Gear shift control apparatus

Details Gear shift control apparatus Gear shift control apparatus

1997-01-23

1999-02-02

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477154, F16H 6108, F16H 6106

Patent

active

058657088

ABSTRACT:
A gear shift control apparatus for use in an automatic transmission having friction elements each of which is operable on a working fluid pressure applied thereto in an engaged and released state. A change is produced from the current gear ratio to a desired gear ratio by increasing the pressure of the working fluid to a first one of the friction elements at a first rate to engage the first friction element while decreasing the pressure of the working fluid to a second one of the friction elements at a second rate to release the second friction element. A time elapsed for a torque phase in the gear ratio change is measured. The first rate is decreased when the measured torque phase time is shorter than a predetermined value. The second rate is increased when the measured torque phase time is longer than the predetermined value.

REFERENCES:
patent: 4653350 (1987-03-01), Downs et al.
patent: 4870581 (1989-09-01), Ito et al.
patent: 4969098 (1990-11-01), Leising et al.
patent: 4998451 (1991-03-01), Sano
patent: 5063814 (1991-11-01), Baba et al.

Affiliated with

Also associated with

Rating

Gear shift control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1111872