| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve a running performance and control accuracy for a continuously variable transmission by estimating the operation of a supercharging pressure reducing means so as to correct a transmission ratio in a device where a supercharger equipped engine having a supercharging pressure reducing device is connected to the continuously variable transmission. SOLUTION: In a device where an engine equipped with a turbocharger 32 and a recirculation valve 33 is connected to a continuously variable transmission 1 employing a troidal variable transmission 10, an objective input shaft rotational number map value and an objective transmission ratio map value are calculated by a transmission controller 2, then a primary delay actual objective input shaft rotational number is decided and the control amount of a step motor 61 is calculated based on estimated input torque estimated from the rotational number and the operational condition of the recirculation valve 33. Then, after the control position of the step motor 61 is obtained according to the actual objective input shaft rotational number, the feedback control amount of the step motor 61 is calculated, a control amount, is calculated according to the response characteristic of the step motor 61 and then a transmission ratio is changed.</p> |
