Shift control apparatus for automatic transmission

Details Shift control apparatus for automatic transmission Shift control apparatus for automatic transmission

1996-04-04

1997-10-21

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477117, B60K 4102, F16D 2514

Patent

active

056790953

ABSTRACT:
An engagement-actuation control for a frictionally engaging element to establish a driving range in response to a shift command to shift from a neutral range to the driving range comprises a plurality of control stages including an invalid-stroke-clearing control. This invalid-stroke-clearing control is finished when invalid-stroke clearing is judged complete on the basis that the absolute value of the rate of rotational change of a turbine shaft is equal to or greater than a predetermined rate and that the difference between the rotational speed of an engine and the rotational speed of the turbine shaft is equal to or greater than a predetermined value.

REFERENCES:
patent: 5094128 (1992-03-01), Kamada
patent: 5224398 (1993-07-01), Sasaki
patent: 5249483 (1993-10-01), Iizuka
patent: 5400670 (1995-03-01), Yamatani et al.

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