To reduce ventilation resistance without excessively enlarging a seal diameter, in a fuel shut-off valve.SOLUTION: A fuel shut-off valve (20) comprises a valve body (40) for controlling the ventilation and the block of a fuel vapor flow passage (VC), and an accommodation chamber forming part (30) for forming an accommodation chamber (30S). The accommodation forming part (30) has an opening forming part (327) for making the inside and the outside of the accommodation chamber (30S) communicate with each other, and forming an opening (32b) in which fuel vapor passes, a cylindrical valve seat (325) of the valve body (40) formed at an inner surface, and protruding to the accommodation chamber (30S) while surrounding the opening (32b), and a cylinder wall part (321) formed at an outer surface, and protruding in a direction separating from the accommodation chamber (30S) while surrounding the opening (32b). An inside diameter end part of the cylinder wall part (321) is located apart from an outer edge of the opening (32b) to the outside of a radial direction, and an inside diameter of the cylinder wall part (321) is larger than 1 time of an inside diameter of the opening (32b), and equal to or smaller than 1.4 times.SELECTED DRAWING: Figure 1

    【課題】燃料遮断弁において、シール径を過度に大きくすることなく通気抵抗を低減する。【解決手段】燃料遮断弁(20)は、燃料蒸気流路(VC)における通気と遮断とを制御する弁体(40)と、収容室(30S)を形成する収容室形成部(30)とを備える。収容室形成部(30)は、収容室(30S)内と外を連通させ、燃料蒸気が通る開口(32b)を形成する開口形成部(327)と、内表面に形成され開口(32b)を囲んで収容室(30S)に突出する弁体(40)の筒状の弁座(325)と、外表面に形成され開口(32b)を囲んで収容室(30S)から離れる方向に突出する円筒壁部(321)とを有する。円筒壁部)(321)の内径端部は、開口(32b)の外縁から径方向外側に離れて位置し、円筒壁部(321)の内径は、開口(32b)の内径の1倍よりも大きく且つ1.4倍以下である。【選択図】図1


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    Title :

    FUEL SHUT-OFF VALVE


    Additional title:

    燃料遮断弁


    Contributors:

    Publication date :

    2021-10-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F16K VALVES , Ventile



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