| 摘要 |
The present invention pertains to a device that is for controlling an automatic transmission provided with a first friction fastening element that fastens at a first gear shift stage and opens at a second gear shift stage. When there has been a shift request from the second gear shift stage to the first gear shift stage during shifting from the first gear shift stage to the second gear shift stage, the occurrence of shocks and racing is prevented. The shifting from the first gear shift stage to the second gear shift stage is completed (S1), then the stroke rate of a piston that presses the friction plate of the first friction fastening element is calculated (S2), and compared to a predetermined stroke threshold (S3). When the result is equal to or less than the stroke threshold, shifting control from the second gear shift stage to the first gear shift stage is started. |
