Vehicular continuously variable transmission, vehicle equipped with vehicular continuously variable transmission, and method of controlling vehicular continuously variable transmission

A vehicular continuously variable transmission that continuously varies a gear ratio of a vehicle by varying a winding diameter of a belt wound around a drive pulley and a driven pulley, the vehicular continuously variable transmission comprising:

• a target gear ratio setting unit configured to set a target gear ratio;
• a gear ratio control unit configured to output a command value of a drive pulley hydraulic pressure supplied to the drive pulley and a command value of a driven pulley hydraulic pressure supplied to the driven pulley, based on an input torque input to the vehicular continuously variable transmission and the target gear ratio;
• a hydraulic pressure detecting unit configured to detect the driven pulley hydraulic pressure;
• a first rotation speed detecting unit configured to detect a rotation speed of the drive pulley;
• a second rotation speed detecting unit configured to detect a rotation speed of the driven pulley;
• an actual gear ratio calculation unit configured to calculate an actual gear ratio based on the rotation speed of the drive pulley and the rotation speed of the driven pulley;
• a reference gear ratio calculation unit configured to calculate a reference gear ratio by modifying the actual gear ratio, based on the input torque and the driven pulley hydraulic pressure;
• and
• a condition determination unit configured to, in a case where the target gear ratio is an overdrive gear ratio, determine that at least part of rings of the belt is missing when the reference gear ratio is equal to or greater than a predetermined gear ratio and the drive pulley hydraulic pressure is equal to or greater than a first predetermined hydraulic pressure.