Patent ID: 6334833
Filing Date: 2002-01-01
Classification: F16H,Y10S,Y10T

Abstract:
A control apparatus for an automatic transmission which is connected to an engine and having a predetermined friction engagement means for engaging and disengaging to practice a shift for the automatic transmission, comprising:a hydraulic pressure regulation command generation means for regulating a hydraulic pressure which acts on said predetermined friction engagement means during shifting of the automatic transmission and for changing a hydraulic pressure regulation characteristic; and an operation condition recognition means for recognizing a shift pattern and an engine load; the control apparatus further comprising a chronological aging judgment means for judging a chronological aging of said predetermined friction engagement means which contributes to the shift for the automatic transmission; and a characteristic value store means for storing a coefficient of friction of said predetermined friction engagement means; wherein said characteristic value store means changes the coefficient of friction of said predetermined friction engagement means when said predetermined friction engagement means is judged to have undergone the chronological aging.