| 摘要 |
PURPOSE:To reduce a shift shock so effectively by controlling the extent of engine power so as to be reduced when detecting that a vehicle state is in a power-on state as well as when detecting a one-way clutch enters a specified period just before synchronization. CONSTITUTION:An automatic transmission equipped with a torque converter 20, an over-drive mechanical part 40, and an underdrive mechanical part 60 of forward three steps and backward one step drives and controls solenoid valves S1-S3 in a hydraulic control circuit 106 by means of an automatic transmission control computer 104A inputting each signal of a throttle sensor 100, a car speed sensor 102 or the like, through which each shift step is thus settled. In this case, whether the vehicle is in a power-on state or not is judged, while also whether three one-way clutches F0-F2 in the automatic transmission enters a specified period just before synchronization or not is judged. When all is judged as YES, in order to reduce engine power, for example, ignition timing is controlled to be delayed. |
