PROBLEM TO BE SOLVED: To solve the problem that per pressure increase control for pulling up a sealed fuel tank from excessive negative pressure to low negative pressure, when a seal valve is opened/closed in a case where a cabin is extremely silent, operation sound is transmitted to a crew member to cause deterioration of a noise characteristic.SOLUTION: A control unit 32, when pressure of a fuel tank 14 lowers predetermined negative pressure Pnear fuel saturation vapor pressure, and a cabin sound level is a threshold or more, operates a seal valve 28 to increase the pressure of the fuel tank 14 to a normal negative pressure area P-Phigher than the predetermined negative pressure P.SELECTED DRAWING: Figure 1

    【課題】密閉式の燃料タンクを過負圧から低負圧まで引き上げる増圧制御に当たり、車室内が極めて静粛なときに封鎖バルブを開閉させると、その作動音が乗員まで伝わっていわゆる騒音特性が悪化する。【解決手段】制御部32は、燃料タンク14の圧力が燃料飽和蒸気圧付近の所定負圧PVLを下回り、かつ、車室音レベルが閾値以上であるときに、封鎖バルブ28を作動させて燃料タンク14の圧力を所定負圧PVLより高圧の正常負圧領域PL〜PUまで上昇させる。【選択図】図1


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    Title :

    PRESSURE CONTROL DEVICE OF VEHICULAR FUEL TANK


    Additional title:

    車両用燃料タンクの圧力制御装置


    Contributors:

    Publication date :

    2016-07-07


    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



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