| 摘要 |
PROBLEM TO BE SOLVED: To prevent the input rotational speed of an automatic transmission from overshooting. SOLUTION: In a control device in which a frictionally engaging device is engaged so as to carry out speed shift, and an input torque is decreased under control in accordance with a progress of the speed shift, there are provided an estimation means (Step 1) for estimating a speed shift time T required for the input rotational speed reaches a synchronized rotational speed, when the control for decreasing the input torque is carried out during speed shift, a comparing means (Step 4) for detecting such a fact that the speed shift time T estimated by the estimation means (Step 4) becomes smaller than a time Ta required for eliminating a back clearance of the above-mentioned frictionally engaging device, and a torque-down instruction means (Step 5) for carrying out the control of decrease in the input torque when the comparing means (Step 4) detects such a condition that the speed shirt time T becomes smaller than the reference time Ta. |
