| 摘要 |
A gear shift control device of an automatic transmission of a vehicle, including: a means for estimating a target shift stage for harmonizing rotation speed and power output of engine of the vehicle; a means for estimating slip angle of at least one of the pair of drive wheels; a means for estimating slip ratio of the at least one drive wheel which would be caused thereon by the automatic transmission being shifted to the target shift stage; a means for estimating tire grip of the at least one drive wheel based upon the estimated slip angle and the estimated slip ratio; a means for judging if the estimated tire grip of the at least one drive wheel is in a grip range predetermined therefor; and a means for executing gear shift of the automatic transmission when the target shift stage is different from a current shift stage with the estimated tire grip being within the predetermined grip range. |
