Controller of toroidal continuously variable transmission

A controller of a toroidal continuously variable transmission in which a transmission ratio is continuously changed depending on a roller position of a power roller, the controller comprising:

• a hydraulic actuator which changes the roller position;
• and
• a position control unit which outputs a driving signal to the hydraulic actuator to control the roller position,
• wherein the hydraulic actuator includes a biasing mechanism which forcibly keeps the roller position at a predetermined position in a case where the driving signal meets a predetermined condition,
• wherein the position control unit is configured to perform a start-up control during start-up of the toroidal continuously variable transmission, and
• wherein during the start-up control, the position control unit is configured to
• output the driving signal to reciprocate a spool of the hydraulic actuator in a case where a temperature of hydraulic oil supplied to the hydraulic actuator is lower than a reference temperature, and
• output the driving signal which meets the predetermined condition to keep the roller position at the predetermined position in a case where the temperature of the hydraulic oil has become equal to or higher than the reference temperature thereafter.