A method for a fuel system, comprising: during a first condition, including an engine-off condition and a sealed fuel tank, directing fresh air into a fuel vapor canister responsive to detecting hydrocarbons in a canister vent line. By directing fresh air into the fuel vapor canister, fuel vapor stored within the canister may be redistributed away from the canister vent line. In this way bleed emissions from the fuel system may be reduced without the need for a dedicated bleed canister.
Systems and methods for reducing bleed emissions
2017-05-16
Patent
Elektronische Ressource
Englisch
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 / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF |
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