A method for operating an evaporative emissions control system for use with a fuel tank that stores and delivers fuel to an internal combustion engine is provided. A vent shut-off assembly is providedthat selectively opens and closes at least one valve to provide overpressure and vacuum relief for the fuel tank. The vent shut-off assembly selectively vents to a purge canister. The at least one valve is closed whereby vapor is precluded from passing from the fuel tank to the purge canister. A purge event is performed wherein dedicated fresh air is drawn into the purge canister and delivered from the purge canister to the engine.
本文提供了一种用于操作蒸发排放物控制系统的方法,该蒸发排放物控制系统与储存燃料并将燃料递送到内燃发动机的燃料箱一起使用。提供排气关断组件,该排气关断组件选择性地打开和关闭至少一个阀而为燃料箱提供过压和真空释放。排气关断组件选择性地向净化罐排气。关闭至少一个阀,由此阻止蒸气从燃料箱传递到净化罐。执行净化事件,其中专用新鲜空气被吸入净化罐中并从净化罐递送到发动机。
Evaporative emissions control system and method for isolating fuel tank from a purge canister
用于将燃料箱与净化罐隔离的蒸发排放物控制系统和方法
24.07.2020
Patent
Elektronische Ressource
Chinesisch
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 / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen |
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