Automatic transmission control system

Details Automatic transmission control system Automatic transmission control system

1991-09-27

1993-07-06

Lorence, Richard M.

Machine element or mechanism

Rotary driven device adjustable during operation relative to...

Screw and nut adjusting means

74866, 3644241, F16H 6100

Patent

active

052243982

ABSTRACT:
A control system controls an automatic transmission so that it holds a higher gear for a certain period and then shifts into a specific lower gear suitable for starting a vehicle when the automatic transmission is changed into a forward drive range from a non-forward drive range. When an on-shift input speed, detected at a shift of the automatic transmission into a forward drive range, is higher than a predetermined critical speed (TR1), the control system forces the automatic transmission to hold the high gear as long as the transmission input speed increases while the automatic transmission is in the forward range. The control system further forcibly shifts the automatic transmission into the specific gear when an input speed is higher than a predetermined limit speed.

REFERENCES:
patent: 4222292 (1980-09-01), Will et al.
patent: 4346626 (1982-08-01), Kawamoto
patent: 4665777 (1987-05-01), Kikuchi et al.
patent: 4694709 (1987-09-01), Kikuchi et al.
patent: 4829852 (1989-05-01), Sakakiyama
patent: 4881178 (1989-11-01), Kato et al.
patent: 4984485 (1991-01-01), Kojima et al.
patent: 5094128 (1992-03-01), Kamada

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