Hydraulic device of transmission device for vehicle, has adjusting device that brings variable flow pump in operative connection based on feedback applied hydraulic pressure in active surfaces with pump discharge or suction side

摘要

A variable flow rate pump (2) varies the flow rate in the range of an adjusting device (3). The adjusting device is provided with a valve device (9) formed in the region of a pressure return line (5) in response to a switching position of valve device via throttle cross-sections provided with a low pressure region (12). The adjusting device is used to bring a variable flow pump in operative connection based on pressure feedback applied hydraulic pressure in the region of active surfaces with discharge side or suction side of variable flow pump.