| 摘要 |
PURPOSE:To prevent occurrence of speed change shock, by obtaining a smooth target speed change proceeding degree during an inertia phase time and controlling the hydraulic working pressure for frictional elements such that said target speed change proceeding degree can be achieved. CONSTITUTION:An output from an inertia phase time estimating means 3 is inputted to a target speed change proceeding degree operating means 4 to obtain a smooth target speed change proceeding degree during an estimated inertia phase time so as to control the hydraulic working pressure of a frictional element 1 such that said target speed change proceeding degree can be achieved. Consequently, abrupt change of torque is prevented from occurring during torque phase, while since the output torque from a transmission coincides with the torque after speed change to produce no step in the output torque from the transmission, speed change shock is prevented. |
