Control device for transmission

A control device for a transmission provided with a continuously variable transmission mechanism including a primary pulley to which a drive force of a drive source mounted on a vehicle is input, a secondary pulley that transmits the drive force of the drive source to a drive wheel, and an endless annular member that is wound around the primary pulley and the secondary pulley, the control device comprising:

• a controller configured to perform a gear shift control of changing a transmission gear ratio of the continuously variable transmission mechanism to a low side when rotational oscillation occurs in a rotation member of the continuously variable transmission mechanism and then the rotational oscillation increases a rotation speed of the rotation member, wherein
• the controller performs the gear shift control when a vehicle speed is lower than a predetermined vehicle speed.

A control device for a transmission provided with a continuously variable transmission mechanism including a primary pulley to which a drive force of a drive source mounted on a vehicle is input, a secondary pulley that transmits the drive force of the drive source to a drive wheel, and an endless annular member that is wound around the primary pulley and the secondary pulley, the control device comprising:

• a controller configured to perform a gear shift control of changing a transmission gear ratio of the continuously variable transmission mechanism to a low side when rotational oscillation occurs in a rotation member of the continuously variable transmission mechanism and then the rotational oscillation increases a rotation speed of the rotation member, wherein
• the controller performs the gear shift control when the transmission gear ratio of the continuously variable transmission mechanism is larger than a predetermined transmission gear ratio.