MEDIUM PRESSURE CONTROL DEVICE OF CONTINUOUSLY VARIABLE TRANSMISSION AND CONTINUOUSLY VARIABLE TRANSMISSION

摘要

A medium pressure control device of a continuously variable transmission includes a pump unit capable of switching a discharge volume of an operating medium to a control system, which controls a contacting surface pressure of rotation members and a transmitting member and the transmission ratio by a pressure of the operating medium, in plural stages; and a transmission ratio control unit that controls the control system and relatively delays a transmission shift when the discharge volume of the operating medium to the control system by the pump unit switches from a relatively small volume to a relatively large volume with the transmission shift.