| 摘要 |
PURPOSE:To aim at simplification and miniaturization in a device structure, by forming a spool, controlling a discharge flow rate out of a pump, in a pump body, while installing a variable throttle part, controlling a position of the spool by differential pressure, in the said body. CONSTITUTION:A flow control valve V consisting of a variable throttle part (f) and a flow control part (s) should be solidly assembled in a body 11 of a pump P, while the body 11 is made up of installing an inflow hole 12 to be interconnected to the discharge side of the pump P, a return hole 13 returning a hydraulic fluid to the inside of the pump P and feed hole 16 to be interconnected to a control valve 15 of a power cylinder 14. In addition, a partition wall 17 is installed in a passage process between the inflow hole and the feed hole 16, forming a discharge hole 18 herein, and a spool 19 of the flow control part (s) is installed at the upstream side of the said hole 18, while a sliding shaft 20 of the variable throttle part (f) making a proportional solenoid 25 a driving source is installed at the downstream side, respectively. This proportional solenoid 25 is energized with a continuous rating current and controlled by a controller C on the basis of a car speed v and a pump revolving speed N. |
