Patent ID: 9162673
Filing Date: 2015-10-20
Classification: B60W,F16H,Y10S,Y10T

Abstract:
1. A gear shift control system for an automatic transmission mounted in a vehicle to transmit torque, as produced by a power source, to a wheel of the vehicle, comprising: a speed determiner which works to determine a speed of the vehicle; a deceleration detector which detects deceleration of the vehicle when a braking force is being applied to the wheel; a braking force determiner which determines the braking force applied to the wheel when the deceleration detector is detecting the deceleration of the vehicle; a deceleration determiner which determines a deceleration of the vehicle as a function of the speed of the vehicle, as determined by the speed determiner, and the braking force, as determined by the braking force determiner; a gear shift controller which determines whether the deceleration of the vehicle, as determined by the deceleration determiner, is greater than a given deceleration threshold, and when the deceleration of the vehicle is determined to be greater than the given deceleration threshold, the gear shift controller inhibits the automatic transmission from upshifting gears thereof; and wherein the given deceleration threshold is variable with vehicle speed and the gear shift control system determines a higher value for the given deceleration threshold at a higher vehicle speed and a lower value for the given deceleration threshold at a lower vehicle speed.