Methods and systems for a vehicle evaporative emission control system are provided. Methods and systems are provided herein for a diagnostic procedure for an internal vapor recovery line of an evaporative emission control system of a vehicle. In one example, a method for an engine of a vehicle includes, during a refueling event, indicating degradation of an internal vapor recovery line in response to a fuel tank pressure increasing when a fuel level reaches a threshold level below a target refueling limit for the fuel tank. In this manner, engine shutdown due to liquid fuel entering the evaporative emission control system may be avoided.
本公开提供了“用于车辆蒸发排放控制系统的方法和系统”。本文提供了用于车辆的蒸发排放控制系统的内部蒸气回收管线的诊断程序的方法和系统。在一个示例中,一种用于车辆的发动机的方法包括在加燃料事件期间,响应于在燃料水平达到低于燃料箱的目标加注限制的阈值水平时燃料箱压力增加,而指示内部蒸气回收管线的劣化。以这种方式,可以避免由于液体燃料进入蒸发排放控制系统而导致的发动机关闭。
METHOD AND SYSTEM FOR VEHICLE EVAPORATIVE EMISSION CONTROL SYSTEM
用于车辆蒸发排放控制系统的方法和系统
2022-04-22
Patent
Electronic Resource
Chinese
IPC: | F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF |
System for evaporative and refueling emission control for a vehicle
European Patent Office | 2016
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