Control apparatus for automatic transmission

Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine

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Details

477152, 477155, F16H 6104

Patent

active

059116471

ABSTRACT:
An automotive automatic transmission has an input shaft receiving a rotational force from an engine, an output shaft for outputting a rotational force to a vehicle driving wheel, a frictional engagement device having an adjustable engagement condition, and a transmission device for transmitting a rotational force from the input shaft to the output shaft at a gear speed ratio depending on the engagement condition of the frictional engagement device. A control apparatus for the automotive automatic transmission includes an engagement condition adjusting device for adjusting the engagement condition of the frictional engagement device by feeding a hydraulic pressure thereto in response to an instructed control amount. The control apparatus also includes a control amount calculating device for calculating the control amount such that a time-domain variation in the control amount is along a curve which corresponds to a monotonic increase and whose variation rate gradually increases, or such that a time-domain variation in the control amount is along a curve which corresponds to a monotonic decrease and whose variation rate gradually decreases.

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