| 摘要 |
PROBLEM TO BE SOLVED: To prevent overshooting or undershooting of the input rotational speed of a continuously variable transmission. SOLUTION: In a variable speed control device for a continuously variable transmission, limiting value in target input rotational speed causing a control deviation in relation to an actual input rotational speed value is set. In order to make the actual input rotational speed match the target input rotational speed, the transmission ration is controlled by a feedback control, including a proportional operation and an integrating operation based upon the control deviation between the target input rotational value and actual input rotational speed value. While varying the target input rotational speed to the limiting value, when the control deviation becomes zero or almost zero, during the control process of making the actual input rotational speed match the target input rotational speed, guard-setting means (steps S2-S5) for setting the value of the integration operation or the value equivalent to the integrating operation at zero or almost zero are provided for the system.
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