Patent ID: 6973379

Claim:
A continuously variable transmission control apparatus for controlling a continuously variable transmission having a drive pulley connected to an output shaft of an engine on a motor vehicle and having a drive cylinder for setting a pulley width, and a driven pulley driven by said drive pulley through a belt to drive a wheel axle and having a driven cylinder for setting a pulley width, so that said continuously variable transmission transmits the rotational speed of said output shaft at a continuously variable transmission ratio to said wheel axle, said continuously variable transmission control apparatus comprising: torque calculating means for calculating a theoretical torque to be transmitted through said belt; guaranteed torque calculating means for calculating a guaranteed torque which is different when the motor vehicle is in a normal operating state and a low load state, from the calculated theoretical torque; and working fluid pressure setting means for setting a working fluid pressure to be applied to said drive cylinder and said driven cylinder from said guaranteed torque, wherein said guaranteed torque calculating means comprises: first arithmetic means for calculating a first guaranteed torque by adding a first constant to said calculated theoretical torque; second arithmetic means for calculating a second guaranteed torque by multiplying a second constant by said calculated theoretical torque; and guaranteed torque selecting means for selecting a smaller one of said first guaranteed torque and said second guaranteed torque when the motor vehicle is in said low load state; wherein said working fluid pressure setting means sets said working fluid pressure according to a pressing force calculation reference torque selected by said guaranteed torque selecting means.