| 摘要 |
PROBLEM TO BE SOLVED: To perform change gear ratio control appropriately without generating overshoot so as to improve fuel consumption and operability by computing deviation between an arrival change gear ratio and a target change gear ratio, and determining a dynamic characteristic constant for computing the target change gear ratio and a command change gear ratio according to the deviation. SOLUTION: In a target change gear ratio generating device 400 inputting output signals of sensors 301, 306, the target input rotating speed of a transmission is first computed from vehicle speed and throttle opening in order to obtain an arrival change gear ratio. This target input rotating speed is divided by the output rotating speed of the transmission to compute the arrival change gear ratio, and then a dynamic characteristic constant (time constant) of a change gear ratio to be a target at the time of making the dynamic characteristic of the change gear ratio to be the target coincide with the arrival change gear ratio is determined according to change gear ratio deviation between the arrival change gear ratio and the change gear ratio to be the target. The target change gear ratio and a command change gear ratio is then computed by an inverse system of the arrival change gear ratio, the dynamic characteristic constant of the change gear ratio to be the target and the dynamic characteristic of a change gear ratio servo device to establish a requested change gear ratio. |
