Patent ID: 9568098
Date: 2017-02-14
CPC Classifications: F16H

Claim:
1. A controller for a vehicle, the vehicle including a predetermined clutch mechanism having a first clutch and a second clutch, and a transmission that includes a first transmission mechanism that continuously changes its speed ratio and a second transmission mechanism having a set speed ratio different from that of the first transmission mechanism, a first transmission path including the first transmission mechanism and a second transmission path including the second transmission mechanism being provided in parallel with each other between an input shaft to which torque is input from a driving force source of the vehicle and an output shaft that outputs torque to an output member, the transmission being configured to carry out transmission of power between the input shaft and the output shaft via one of the first transmission path and the second transmission path, the controller comprising: an electronic control unit configured to: (a) determine whether a change shift is required in response to at least any one of a traveling state of the vehicle or an operation state of the transmission; (b) carry out the change shift for changing a path of the transmission of power between the first transmission path and the second transmission path by engaging one of the first clutch and second clutch and disengaging the other of the first clutch and second clutch; (c) set a change speed ratio region that defines a range of a speed ratio of the first transmission mechanism such that a rotation speed difference between engagement members of the clutch mechanism, which are engaged with each other in carrying out the change shift, is smaller than or equal to a predetermined value; and (d) carry out the change shift: