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    • 9. 发明授权
    • Fuel vapor discharge limiting device for fuel tank
    • 燃油箱燃油蒸汽排放限制装置
    • US5443561A
    • 1995-08-22
    • US213970
    • 1994-03-16
    • Yoshiyasu SakataMitsuo Sugiyama
    • Yoshiyasu SakataMitsuo Sugiyama
    • B60K15/077B60K15/035F02M37/00F16K24/04F16K31/18
    • B60K15/03519F16K24/044Y10T137/0874Y10T137/3099Y10T137/86324
    • A fuel vapor discharge limiting device for limiting communication between a fuel tank and a fuel vapor discharge pipe for discharging a fuel vapor in the fuel tank. The fuel vapor discharge limiting device includes a first float valve for cutting off the communication between the fuel tank and the fuel vapor discharge pipe when a liquid level in the fuel tank rises near a predetermined full level; a relief valve for allowing the communication between the fuel tank and the fuel vapor discharge pipe when an internal pressure in the fuel tank becomes not less than a predetermined value; and a second float valve for blocking the communication allowed by the relief valve when the liquid level in the fuel tank abnormally rises over the predetermined full level. Accordingly, oversupply of liquid fuel to the fuel tank can be prevented, and the internal pressure in the fuel tank can be maintained always within a predetermined permissible range. Furthermore, discharge of the liquid fuel to the fuel vapor discharge pipe can be prevented.
    • 一种燃料蒸汽排放限制装置,用于限制燃料箱和用于排出燃料箱中的燃料蒸汽的燃料蒸汽排放管之间的连通。 燃料蒸气排出限制装置包括:第一浮阀,用于当燃料箱中的液位升高到预定的全部水平时,切断燃料箱与燃料蒸汽排放管之间的连通; 当燃料箱中的内部压力变得不小于预定值时,用于允许燃料箱和燃料蒸汽排出管之间的连通的安全阀; 以及第二浮阀,用于当燃料箱中的液位异常上升超过预定的全部水平时,阻止安全阀所允许的连通。 因此,可以防止液体燃料向燃料箱供过量供给,并且能够将燃料箱内的内部压力始终保持在规定的容许范围内。 此外,可以防止液体燃料排出到燃料蒸汽排放管。