A method for heating a catalyst includes maintaining engine speed at a high rpm when the engine is started. The high rpm is maintained even if the driver shifts the transmission out of neutral. Engine speed is lowered when there is an indication that the driver wishes to drive off, such as the driver releasing the brake pedal. Maintaining the high rpm during the time between shifting the transmission out of neutral and providing an indication that drive off is desired contributes to additional catalyst warm up. The high rpm may be disabled if the catalyst temperature is sufficiently high or if the vehicle is parked on a slope, for example.


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    Title :

    Controlling internal combustion engine emissions


    Contributors:
    JERGER ROB (author) / HAYDEN DAVID (author) / JARVIS SIMON (author) / WICKS NICK (author)

    Publication date :

    2017-02-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    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 / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen



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