Shift control apparatus and shift control method for a...

Details Shift control apparatus and shift control method for a... Shift control apparatus and shift control method for a...

2005-08-16

2005-08-16

Pang, Roger (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

C477S118000, C477S148000, C701S060000

Reexamination Certificate

active

06929583

ABSTRACT:
A shift control apparatus for a vehicular automatic transmission provided with a fuel cut apparatus which cuts off fuel supplied to an engine when an engine speed exceeds a predetermined value during deceleration of a vehicle, and an automatic transmission in which a gearshift is achieved with a clutch-to-clutch downshift in which a hydraulic friction device to be released is released and a hydraulic friction device to be applied is applied, further includes a controller. The controller corrects, through learning control, an apply pressure of at least one of the hydraulic friction devices to be operated for the clutch-to-clutch downshift such that an amount of drop in a rotational speed of an input shaft of the automatic transmission increases when that amount of drop is less than a predetermined value during the clutch-to-clutch downshift.

REFERENCES:
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patent: 5848370 (1998-12-01), Kozaki et al.
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patent: 405332439 (1993-12-01), None
patent: 407166902 (1995-06-01), None
patent: 11-287317 (1999-10-01), None
patent: 11-287318 (1999-10-01), None

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