| 摘要 |
PURPOSE:To improve the followability of line pressure in regard to engine torque change by setting target line pressure on the basis of engine torque detected by using parameters which are different respectively in stationary, acceleration return and acceleration stepping-on states. CONSTITUTION:At an automatic transmission, the operations of a line pressure solenoid 44, a lock up solenoid 56, the 1st and 2nd shift solenoids 64, 66 or the like are controlled by means of a control unit 300. At the time of setting line pressure at the unit 300, the output signals of an engine rotation speed sensor 301, a throttle opening sensor 303, an air intake amount sensor 399 or the like are inputted, and whether a throttle opening change rate is larger than a predetermined value or not is decided. And in the case of YES, engine torque is retrieved on the basis of a throttle opening and a rotary speed, and in the meanwhile, in the case of NO, engine torque is retrieved on the basis of an air intake amount and the rotary speed, and target line pressure is calculated according to each engine torque. |
