| 摘要 |
PURPOSE:To control feed set pressure without receiving pressure loss of a flow control valve, by guiding pilot oil pressure for a pressure control valve from a load line at the secondary side of the flow control valve and delivery control oil pressure of a variable delivery pump from immediately after delivery of the pump. CONSTITUTION:Pilot oil pressure for a pressure control valve 13, as shown by a pilot pipe line of broken line, is directly guided from a load line at the secondary side of a flow control valve 12, and control oil pressure to a control actuator 10a is guided from immediately after delivery of a variable delivery vane pump 10 at the primary side of the flow control valve 12. In this way, working pressure of a remote control relief valve 10 is not contained with difference pressure generated in the flow control valve 12 because of receiving pilot pressure directly from the load line. Accordingly, pressure control can be performed so as to obtain feed set pressure wuthout being affected by a loss of the flow control valve 12. |
