Patent ID: 7384372

Claim:
A control device for a belt continuously variable transmission, the belt continuously variable transmission having a primary pulley on an input side in which a groove width varies in accordance with an oil pressure; a secondary pulley on an output side in which the groove width varies in accordance with an oil pressure; and a V-belt which is wrapped around the primary pulley and the secondary pulley; the control device comprising: an oil pressure control unit which applies a thrust to each of the primary pulley and the secondary pulley, and a controller which is programmed to: judge whether or not a pulley ratio of the belt continuously variable transmission is less than 1; when the pulley ratio is less than 1, set a target thrust of the secondary pulley on the basis of an input torque to the primary pulley and a coefficient of static friction between an element forming the V-belt and the secondary pulley, and subsequently instruct the oil pressure control unit to apply the target thrust of the secondary pulley to the secondary pulley; and when the pulley ratio is at least 1, set a target thrust of the primary pulley on the basis of the input torque to the primary pulley and a coefficient of dynamic friction between the element forming the V-belt and the primary pulley, and subsequently instruct the oil pressure control unit to apply the target thrust of the primary pulley to the primary pulley.