Patent ID: 6064935
Filing Date: 2000-05-16
Classification: F16H

Abstract:
An apparatus for controlling the operation of an automatic transmission for an automotive vehicle, comprising:means for shifting the transmission from a first transmission gear speed to a second transmission gear speed in accordance with a predetermined transmission shift pattern, said predetermined transmission shift pattern including a transmission shift line at which the shifting between the first and second transmission gear speeds is initiated;means for detecting an engine condition of the vehicle, said detecting means includingmeans for setting an end point in the predetermined transmission shift pattern after said shifting of the transmission from the first transmission gear speed to the second transmission gear speed is initiated,means for calculating a first ratio relating to driving torques associated with said end point, andmeans for checking said engine condition based on the first ratio;means for automatically shifting back the transmission from the second transmission gear speed to the first transmission gear speed based on said engine condition within a predetermined time period after said shifting of the transmission from the first transmission gear speed to the second transmission gear speed is initiated; andmeans for shifting said transmission shift line to coincide with said end point when the transmission is automatically shifted from the second transmission gear speed to the first transmission speed.