| 摘要 |
A control system for an automatic transmission comprises: a fluid transmission unit (12) for transmitting the rotation of an engine (10) to a speed change unit (16); a clutch (C) adapted to be applied when a forward running range is selected, to transmit the rotation of the fluid transmission unit to the transmission mechanism of the speed change unit; a hydraulic servo (C1) for applying/releasing the clutch; throttle opening detecting means for detecting a throttle opening; stop state detecting means for detecting a vehicle stop state in which a forward running range is selected, in which the throttle opening is fully closed, in which the brake pedal is depressed and in which the vehicle speed is substantially zero; input RPM detecting means for detecting the input RPM of the speed change unit; output RPM detecting means for detecting the output RPM of the speed change unit; hydraulic control means (102) for controlling the oil pressure to be fed to the hydraulic servo; and a control unit (41). This control system includes: release means (103) for releasing the clutch by lowering the oil pressure to be fed to the hydraulic servo, when the stop state of the vehicle is detected by the stop state detecting means; and application means (104) for applying the clutch by raising the oil pressure to be fed to the hydraulic servo, when the vehicle stop state is not detected by the stop state detecting means while the clutch is being released by the release means. The application means raises the oil pressure gradually, but raises it abruptly if an application ending condition dictating the engagement end of the clutch is satisfied. The oil pressure is abruptly raised, when the application ending condition is satisfied if the throttle opening is not fully closed, and after a first set time has elapsed if the throttle opening is fully closed. <IMAGE> |
