Shift control apparatus in vehicle automatic transmission

Details Shift control apparatus in vehicle automatic transmission Shift control apparatus in vehicle automatic transmission

1997-03-31

1999-02-16

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477 63, 477143, 477156, F16H 6108

Patent

active

058714189

ABSTRACT:
A shift control apparatus in a vehicle automatic transmission, where down-shift is carried out from a high velocity step to a low- velocity step.
A flatness-aiming control has a common targetted change rate with respect to a turbine rotational speed in the inertia phase, and aims a hydraulic command value for the engaging side element and a hydraulic command value for the releasing side element at flatness in the inertia phase with the passage of time.
An initial value setting control sets an engaging side initial value and a releasing side initial value at the beginning of the inertia phase in response to the turbine torque and the turbine rotational speed.

REFERENCES:
patent: 5038636 (1991-08-01), Vukovich et al.
patent: 5063814 (1991-11-01), Baba et al.
patent: 5133231 (1992-07-01), Goto et al.
patent: 5292288 (1994-03-01), Kashiwabara et al.
patent: 5460583 (1995-10-01), Kitada et al.
patent: 5634869 (1997-06-01), Mikami et al.
patent: 5653660 (1997-08-01), Tsukamoto et al.
patent: 5667458 (1997-09-01), Narita et al.

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