ガスエンジンの副室用逆止弁

Check valve for auxiliary chamber of gas engine

Abstract

【課題】高温酸化・焼損やカーボンによる動作不良が発生しない。 【解決手段】弁受座部23と規制段部24との間に形成された弁穴31に、弁受座部23を閉鎖する釣鐘形の弁本体32を設けるとともに、弁本体32を弁座受部23に当接させて閉鎖する方向に付勢するコイルばね25を設け、弁本体32の胴部35の上流端に上鍔部37Uを設けるとともに、下流端に下鍔部37Dを形成し、着火燃料ガスを送り出すために、上鍔部37Uのガス通過部38と、胴部35の連通穴36と中空部33を形成し、下鍔部37Dの外周部に、弁穴31に摺接される一定面積の4つの摺接ガイド面41を90°ごとに形成するとともに、これら摺接ガイド面41の総面積を、当該下鍔部37Dの外周に対応する弁穴31の内周面の面積に対して10%以上で30%以下とした。 【選択図】図3
PROBLEM TO BE SOLVED: To eliminate the occurrence of operational failure by high temperature oxidation, burning damage and carbon.SOLUTION: A hanging bell-shaped valve body 32 for closing a valve receiving seat part 23, is arranged in a valve hole 31 formed between the valve receiving seat part 23 and a regulating step part 24, a coil spring 25 is arranged for biasing the valve body 32 in the closing direction by abutting on the valve seat receiving part 23, an upper flange 37U is arranged on the upstream end of a body part 35 of the valve body 32, a lower flange 37D is formed on the downstream end, a gas passing part 38 of the upper flange 37U, communicating holes 36 of the body part 35 and a hollow part 33 are formed for sending out ignition fuel gas, four sliding contact guide surfaces 41 of the constant area slidingly contacted with the valve hole 31, are formed in an outer peripheral part of the lower flange 37D with every 90°, and the total area of these sliding contact guide surfaces 41 is set to 10-30% to the area of an inner peripheral surface of the valve hole 31 corresponding to the outer periphery of the lower flange 37D.

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Patent Citations (6)

    Publication numberPublication dateAssigneeTitle
    JP-2001050133-AFebruary 23, 2001Hitachi Car Eng Co Ltd, Hitachi Ltd, 株式会社日立カーエンジニアリング, 株式会社日立製作所Electronic fuel injection valve
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    Publication numberPublication dateAssigneeTitle