| 摘要 |
PURPOSE:To optimize the flow of pressure oil, which is developed by accompanying with the movement of a control valve spool by a structure wherein the position of a slide sleeve relative to the control valve spool is changed by the actuation of a compensation pressure control valve. CONSTITUTION:A control valve 16 is arranged slidably in a sleeve bore 19 and slided by the pressure oils in the respective compensation pressure chambers 34 and 35 formed on both sides of the sleeve bore 19. A slide sleeve 33 is changed its position relative to a control valve spool 25. The pressure oil is supplied to pressure chambers 26 anc 27 through reaction ports 43 and 44. In addition, the pressure oil is supplied to the compensation pressure chamber 34 and 35 through compensation pressure ports 45 and 46. Further, the pressure oil is supplied to either one of reaction chambers 26 and 27 in response to the direction of sliding motion of the control valve spool 25 through either one of reaction communicating ports 47 and 48. |
