| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a speed change control device which can properly control a speed change ratio in a continuous variable transmission whose characteristic of a speed change ratio with respect to eccentricity is nonlinear in terms of geometry. <P>SOLUTION: The speed change control device which controls the speed change ratio in the continuous variable transmission of a four-bar linkage mechanism type comprises: a target input torque deriving part which derives target input torque corresponding to a required output to a power source and the rotation number of the power source to the continuous variable transmission; a target input rotation number deriving part which derives the target input rotation number of the continuous variable transmission corresponding to the required torque to the power source; and an eccentricity control part which derives an eccentricity control term for controlling the eccentricity on the basis of the target input torque, the target input rotation number, and the actual input rotation number and the actual output rotation number of the continuously variable transmission. The eccentricity control part comprises: an FF control part which derives a feed-forward control term constituting the eccentricity control term on the basis of the target speed change ratio, the target input torque and the target input rotation number; and an FB control part which derives a feed-back control term constituting the eccentricity control item according to a difference between an actual speed change ratio and a target speed change ratio. <P>COPYRIGHT: (C)2013,JPO&INPIT |
