(EN) PROBLEM TO BE SOLVED: To make compatible responsiveness and vibration restraint when a spool valve piece moves, in a flow control valve.
SOLUTION: This flow control valve includes a damper oil chamber 72 and a contraction part 74 in an inside of a valve housing 40 in a linear solenoid valve 10, and is formed with a contraction flow channel 78 different in a flow cross section through which a hydraulic fluid flows in and out to/from the damper oil chamber 72 by a difference in a moving position of the spool valve piece 50, in the contraction part 74, and vibration of the spool valve piece 50 is thereby restrained by the damper oil chamber 72 and the contraction part 74. Flow-in resistance (flow rate) to the damper oil chamber 72 is changed in addition thereto, by the moving position of the spool valve piece 50. That is, a vibration restraint effect of the spool valve piece 50 gets high although the responsiveness when moving the spool valve piece 50 gets low by the moving position of the spool valve piece 50, and the responsiveness when moving the spool valve piece 50 is restrained from getting low although the vibration restraint effect of the spool valve piece 50 gets low.
COPYRIGHT: (C)2011,JPO&INPIT
【課題】流量制御弁において、スプール弁子の移動時の応答性と振動抑制とを両立させる。
【解決手段】リニアソレノイドバルブ１０においてバルブハウジング４０内にダンパ油室７２及び絞り部７４が備えられ、絞り部７４ではスプール弁子５０の移動位置の違いによりダンパ油室７２へ作動流体が流出入する流通断面積が異なる絞り流路７８が形成されるので、ダンパ油室７２及び絞り部７４によりスプール弁子５０の振動が抑制される。加えて、スプール弁子５０の移動位置によってダンパ油室７２への流入抵抗（流量）が変更させられる。つまり、スプール弁子５０の移動位置によってスプール弁子５０の移動時の応答性は低下させられるがスプール弁子５０の振動抑制効果を大きくさせたり、スプール弁子５０の振動抑制効果は小さくされるがスプール弁子５０の移動時の応答性低下を抑制することが可能になる。
【選択図】図１