METHOD OF CONTROLLING AUTOMATIC TRANSMISSION

摘要

To provide a method of controlling an automatic transmission which enables a vehicle to smoothly turn around corners with an accelerator depressed. A control method is applied to an automatic transmission which is downshifted to increase a gear change ratio when a rate of increase of throttle opening is above a preset value The method comprises: deciding a slip determining threshold on the basis of a steering angle B of a vehicle; detecting rear wheel speeds Vs; averaging the rear wheel speeds V s and deriving an average vehicle speed Va; and prohibiting the downshift of the automatic transmission when a difference between the rear wheel speeds and the average vehicle speed exceeds the slip determining threshold T and the rear wheels are determined to be slipping.