Patent ID: 7192372

Claim:
A hydraulic pressure sensor failure control system for a belt-type continuously variable transmission having a transmission mechanism constructed by winding a belt around pulleys comprised of a primary pulley connected to an engine side and a secondary pulley connected to an output shaft, applying a primary pressure and a secondary pressure which respectively use a line pressure as an original pressure to the primary pulley and the secondary pulley, comprising: a primary hydraulic pressure sensor for detecting the primary pressure; a secondary hydraulic pressure sensor for detecting the secondary pressure; pulley reverse rotation detecting means for detecting reverse rotation of the pulleys; primary pulley torque capacity calculating means for calculating a torque capacity of the primary pulley from the primary pressure; and pulley reverse rotation time control means for performing a predetermined control on the basis of the torque capacity of the primary pulley when the reverse rotation of the pulleys is detected; wherein said primary pulley torque capacity calculating means calculates the torque capacity of the primary pulley on the basis of the secondary pressure detected by the secondary hydraulic pressure sensor when the primary hydraulic pressure sensor fails.