Hydraulic circuit with variable pump and hydraulic motor - has pump output controlled by pressure in pump and motor for multi way valve actuation

摘要

The circuit incorporates a multi-way valve which is used to control the flow of pressure medium to and from the hydrolic motor. A control system is provided for the volumetric output of the pump. The control acts in such a way that the output is reduced with increasing pressure in the pump and the output is increased when the working pressure of the motor falls. A hydraulic signal line is provided which contains a throttle path even when the multi-way valve is closed so that pressurised fluid can flow continuously through the signal line.