Patent ID: 8676454

Claim:
A continuously variable transmission installed in a vehicle to shift a rotation speed of an engine, comprising: a variator which changes a speed ratio continuously; a stepped sub-transmission mechanism provided in series with the variator and configured to switch a speed ratio depending on engagement and release of a plurality of friction elements; and a shift control unit configured to set a final through speed ratio as a target speed ratio based on a driving condition of the vehicle and to cause a through speed ratio, which is an overall speed ratio of the variator and the sub-transmission mechanism, to follow the final through speed ratio in a specified response by changing at least one of the speed ratio of the variator or a gear position of the sub-transmission mechanism, wherein the shift control unit has a manual mode in which a plurality of gear positions are set beforehand and a speed ratio corresponding to any one of the plurality of gear positions is set as the final through speed ratio based on a shift instruction by a driver, the shift control unit being further configured to: execute a control to cause the through speed ratio to follow the final through speed ratio by changing only the speed ratio of the variator if the shift instruction is given from the driver multiple times in a row when the manual mode is selected; and advance a start of a change in the speed ratio of the sub-transmission mechanism or accelerate a progression of the change of the speed ratio of the sub-transmission mechanism as compared with the a case where the manual mode is not selected when the speed ratio of the variator is maximized or minimized and the through speed ratio cannot follow the final through speed ratio.