Methods and systems are provided for indicating whether a canister purge valve in a vehicle evaporative emissions control system is degraded. In one example, an air intake system hydrocarbon (AIS HC) trap temperature may be monitored during a refueling event, and responsive to an indication that the AIS HC trap temperature change is greater than a predetermined threshold, it may be indicated that the canister purge valve is degraded. In this way, diagnosis of whether a vehicle canister purge valve is degraded may be indicated without the use of engine manifold vacuum, and may be advantageous for vehicles configured to operate for significant amounts of time without engine operation, or without intake manifold vacuum.


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    Title :

    Systems and methods for indicating canister purge valve degradation


    Contributors:
    DUDAR AED M (author)

    Publication date :

    2020-04-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen



    SYSTEMS AND METHODS FOR INDICATING CANISTER PURGE VALVE DEGRADATION

    DUDAR AED M | European Patent Office | 2019

    Free access

    Mathematical Modeling of a Balanced Canister Purge Solenoid Valve

    Balsdon, David / Delaire, Gilles | SAE Technical Papers | 1999


    Mathematical Modeling of a Balanced Canister Purge Solenoid Valve

    Delaire, G. / Balsdon, D. / Society of Automotive Engineers | British Library Conference Proceedings | 1999


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