| 摘要 |
<p>PURPOSE:To make it possible to smooth the change-over operation of a clutch at a lower temperature by controlling the clutch pressure by a feed-forward amount in such a way that it is suddenly decreased during a normal start mode in which a continuously variable transmission satisfies a specified limit condition. CONSTITUTION:A control section 82 for changing the duty rate so as to control speed change in accordance with various inputted conditions such as a throttle opening degree, an engine rotational speed, a vehicle speed and the like from first to third rotational speed detectors 72, 76, 80, controls the opening and closing operation of a first primary pressure control three-way solenoid valve 42, a constant pressure control valve 38, a second line pressure control three-way solenoid valve 50 and a third clutch pressure control three-way solenoid valve 58. Further, the control section 82 multiplies an engine torque which is determined in accordance with a throttle opening degree detection signal during normal start mode, by a proportional gain so as to calculate a feed-forward amount for a required clutch pressure. The control section 82 initializes a first feed-forward filter during normal start mode in which a continuously variable transmission 2 satisfies a specified limit condition so as to abruptly decrease the pressure.</p> |
