| 摘要 |
<p>PURPOSE:To aim at reduction of speed change shock and improvement in the durability of a frictional element, by measuring the speed change time of an automatic transmission and controlling a line pressure regulation means so that the speed change time may be a speed change target time for the next time. CONSTITUTION:Required speed change steps are secured at a transmission control unit 200 by controlling solenoid valves 61-64 of an oil pressure circuit part 47 based on detection signals of a water temperature sensor 53, a throttle opening sensor 55, a turbine rotational speed sensor 57, a vehicle speed sensor 58, a shift positioning sensor 59 etc. In this case, a speed change time at the time of changing the speed of an automatic transmission is detected, and line pressure is regulated and controlled to make the speed change time to be a target time. Output torque of an engine is decreased at the time of varying the target time by decreasing a speed change corrective value from an ignition timing advanced angle by a torque decreasing means, and the speed change corrective value is set to a specified value so as to increase a torque decreasing quantity when the target time is shortened.</p> |
