| 摘要 |
PROBLEM TO BE SOLVED: To reliably provide intended response of transmission on various operation conditions by a method wherein a control constant is set according to dynamic characteristics determined at every transmission ratio of a continuously variable transmission and a transmission ratio command value is computed by using the control constant. SOLUTION: A dynamic characteristic estimating part D and disturbance compensating output computing parts G and H for a continuously variable transmission are provided. A position signal for a transmission mechanism part consisting of an actual transmission ratio and a step motor and a transmission ratio command value to a transmission mechanism control part N are provided as an input to the disturbance compensating output computing parts G and H. A position for the transmission mechanism or a change gear ratio command value for the transmission mechanism control part N are selectively provided as the input of the low-pass filter of a disturbance compensating part according to a deviation between the actual transmission ratio and a target transmission ratio. This constitution compensates the non-linear characteristics of the change gear mechanism part N when the deviation between the actual transmission ratio and the target transmission ratio is small, and suppresses compensation of the non-linear characteristics when the deviation is large. This constitution prevents the occurrence of a problem, such as overshoot of a transmission ratio. |
