The present disclosure provides methods and systems for a pressureless fuel tank. Methods and systems are provided for performing reverse purge of an evaporative emission canister in a vehicle having a sealed variable volume fuel tank. In one example, a method may include, in response to an ambient temperature decreasing during a daytime temperature cycle and further in response to fuel vapors loading an EVAP canister above a threshold, closing a valve located at an atmospheric port of the fuel tank and opening a fuel tank isolation valve. In one example, the fuel tank isolation valve may be in fluid communication between the fuel tank and the EVAP canister. In this manner, a sealed variable volume fuel tank can be converted to a ventilated pressurized fuel tank, and reverse purge is initiated during the cooling time of the daytime temperature cycle.

    本公开提供了“用于无压力燃料箱的方法和系统”。提供了用于对具有密封的可变容积燃料箱的车辆中的蒸发排放滤罐执行反向抽取的方法和系统。在一个示例中,一种方法可以包括:响应于环境温度在日间温度循环期间降低并且进一步响应于燃料蒸气将EVAP滤罐装载到高于阈值,关闭位于所述燃料箱的大气端口处的阀并打开燃料箱隔离阀。在一个示例中,所述燃料箱隔离阀可以在所述燃料箱与所述EVAP滤罐之间流体连通。通过这种方式,可将密封的可变容积燃料箱转换为通风的加压燃料箱,并且在日间温度循环的冷却时间期间发起反向抽取。


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    Title :

    METHOD AND SYSTEM FOR A PRESSURE-LESS FUEL TANK


    Additional title:

    用于无压力燃料箱的方法和系统


    Contributors:
    DUDAR AED (author)

    Publication date :

    2023-06-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    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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