CONTROL METHOD FOR TRANSMISSION DEVICE AND CONTINUOUSLY VARIABLE TRANSMISSION

摘要

If the belt return of a continuously variable transmission is not decided when a vehicle speed (V) becomes a threshold value (Vref) or lower, both a control (S180), in which a hydraulic actuator according to the setting of a duty (DS2) of a duty solenoid based on an input torque (Tin) or an oil temperature (Toil), and a closing control (S170) are repeatedly executed for the run and stop of the vehicle. As a result, it is possible to suppress the upshift of the continuously variable transmission, as might otherwise be caused by the gradual increase in the oil pressure of the hydraulic actuator due to the leakage of the line pressure to the side of the hydraulic actuator through the small clearance in the spool of the flow control valve of a hydraulic circuit, and to perform the downshift of the continuously variable transmission.