Patent ID: 6183395
Filing Date: 2001-02-06
Classification: F16H,Y10S,Y10T

Abstract:
A control unit of an automatic transmission having pressure adjusting command generating means which executes a shift by engaging and disengaging a predetermined friction device in an automatic transmission connected to an engine and adjusts a hydraulic pressure acting on said friction device at a time of said shift, comprising:disengage timing recognizing means which recognizes a disengage timing of a disengage side friction device at a time of shifting said automatic transmission;first disengage determining means which determines a disengage operation of said disengage side friction device on the basis of a result of recognition by said disengage timing recognizing means; andsecond disengage determining means which forcibly determines a disengage operation of said disengage side friction device in the case that it is impossible to recognize said disengage timing in said disengage timing recognizing means,wherein said pressure adjusting command generating means operates so as to disengage said disengage side friction device on the basis of determination of said first and second disengage determining means.