Shift control apparatus for automatic transmission

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

2005-11-08

2008-05-20

Ho, Ha D. (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C477S136000, C477S141000

Reexamination Certificate

active

07374512

ABSTRACT:
When it is decided that it is impossible to shift the automatic transmission directly to the target speed position according to the second shifting-action decision made during a shifting control to shift the automatic transmission to a target speed according to a first shifting-action decision, one of a plurality of candidate intermediate speed positions to which the automatic transmission can be shifted directly is determined as an intermediate speed position. The determined intermediate speed position is established with the largest amount of change of an engine speed NE, and accordingly with the longest time required for completion of the change of the engine speed NE during which a hydraulic pressure of a clutch to be engaged to establish the intermediate speed position can be raised, whereby the clutch engaging pressure can be changed at a rate low enough to reduce a shifting shock of the automatic transmission.

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patent: 6113516 (2000-09-01), Janecke
patent: 6851328 (2005-02-01), Umemoto et al.
patent: 2002/0046617 (2002-04-01), Inagawa et al.
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patent: 2002-130454 (2002-05-01), None
patent: 2005-344773 (2005-12-01), None

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