Continuously variable V-belt transmission

A continuously variable V-belt transmission comprising a drive pulley connected to an input shaft, a driven pulley connected to an output shaft, a V-belt spanning between said drive pulley and said driven pulley, a drive side cylinder for setting a width of said drive pulley, a driven side cylinder for setting a width of said driven pulley, a lateral pressure control valve for controlling a lateral pressure control oil pressure of an oil supplied to said drive side cylinder and said driven side cylinder, and a controller for controlling said lateral pressure control valve,

• wherein said controller comprises:
• a transmission torque calculator for calculating a transmission torque based on a signal detected from a drive condition;
• a target belt transmission torque calculator for calculating a target belt transmission torque by adding a designed marginal torque of predetermined value to said transmission torque;
• and
• a signal converter for generating a control signal for driving said lateral pressure control valve based on said target belt transmission torque, whereby said lateral pressure control oil pressure is generated in a most appropriate form based on said target belt transmission torque.