Device and method for controlling a belt-type continuously variable transmission for a vehicle

A control device for a vehicle belt type continuously variable transmission of a vehicle which comprises a primary pulley and a secondary pulley around which a belt is wound so as to control a gear ratio by controlling a primary hydraulic pressure and a secondary hydraulic pressure, the control device comprising:

• a belt slip controller configured to perform a belt slip control, the belt slip control comprising oscillating the secondary hydraulic pressure and extracting an oscillation component of an actual gear ratio due to oscillation from a basic component of the actual gear ratio when a transmission speed is less than a predetermined value so as to control the secondary hydraulic pressure based on a phase difference between the oscillation component of the actual gear ratio and an oscillation component of an actual secondary hydraulic pressure due to oscillation, the transmission speed being a change speed of the gear ratio;
• a limit determining control unit configured to determine whether to limit acceleration of the vehicle;
• and
• a transmission speed limiter control unit configured to limit the transmission speed to less than the predetermined value when the limit determining control unit makes a determination to limit the acceleration of the vehicle,
• wherein the belt slip controller is configured to permit the belt slip control while the transmission speed limiter control unit is limiting the transmission speed to less than the predetermined value.