CONTINUOUSLY VARIABLE TRANSMISSION FOR VEHICLE

In a continuously variable transmission (1) for a vehicle, a variator (2) has a primary pulley (3), a secondary pulley (4), and a belt (V) wound around the primary pulley (3) and the secondary pulley (4). The secondary pulley (4) is provided with a spring (Sp) that generates urging force in a direction in which a groove width of a V groove (43) of the secondary pulley (4) is narrowed. When the vehicle speed is equal to or greater than a prescribed speed during towing, the effect of centrifugal hydraulic pressure of oil (OL) stored in pressure-receiving chambers (R1, R2) of the primary pulley (3) causes the transmission ratio of the variator (2) to be higher than the lowest transmission ratio. 在车辆用的无级变速器(1)中，变速机构(2)具有：初级带轮(3)、次级带轮(4)、卷挂在初级带轮(3)及次级带轮(4)上的带(V)。在次级带轮(4)上设置有弹簧(Sp)，其产生使次级带轮(4)的V形槽(43)的槽宽变窄方向的作用力。当车辆被牵引时达到规定车速以上时，通过贮存在初级带轮(3)的受压室(R1、R2)中的油(OL)的离心油压作用，变速机构(2)的变速比成为比最低挡变速比更高挡侧。