Patent ID: 6669599
Filing Date: 2003-12-30
Classification: F16H,Y10T

Abstract:
A shift control apparatus for an automatic transmission in a wheeled vehicle, comprising:an automatic transmission for changing input speed of rotation of an input shaft to an output speed based on a running state of the vehicle and outputting rotation at the output speed to an output shaft; wheel speed detecting means for detecting wheel speed of a wheel; slip determining means for determining slip based on the wheel speed detected by said wheel speed detecting means and outputting a slip signal corresponding to the determined slip; shifting means for outputting a shift signal for a predetermined gear stage which reduces driving force, when the slip signal is continuing after a predetermined time has passed since start of the slip signal; and maintaining means for outputting a maintaining signal for maintaining, for a predetermined time from a point at which the slip signal was input, a gear stage at the point at which the slip signal was input.