VEHICULAR BELT-DRIVEN CONTINUOUSLY VARIABLE TRANSMISSION ANDCONTROL METHOD THEREOF

摘要

In a vehicular belt-driven continuously variable transmission, belt squee zing force is inhibited from becoming excessive and a safety factor, with re spect to belt slip, of belt squeezing force applied to a transmission belt ( 48) is reduced to a value that is less than or equal to 1.5 by reducing a pr essure receiving area (SOUT) of an output side hydraulic cylinder (46c). As a result, a centrifugal hydraulic pressure canceller chamber on a secondary pulley side (46) can be eliminated thus simplifying the structure of the veh icular belt-driven continuously variable transmission, while belt squeezing force can be appropriately controlled.