| 摘要 |
PROBLEM TO BE SOLVED: To improve control accuracy of transmission torque capacity according to input shaft torque in an automatic transmission for changing a speed by shift-changing a frictionally engaging element. SOLUTION: In an inertia phase of power-on up-shift, a turbine rotating speed is feedback controlled in a desired value. Inertia torque is determined by multiplying a deviation between a value by processing a differential value of the desired value by a secondary delay filter and a differential value of an actual value by inertia (S833) to correct hydraulic pressure according to an estimate of the input shaft torque (S834). A learning value, Tthos for correcting the estimate value is determined from the intertia torque (S835), and is then converted into a learning value, Ethos for correcting engine generating torque on the basis of the torque ratio of a torque converter. The learning value, Ethos is added to the estimate of the engine generating torque at shifting time of the next time to be corrected. |
