When a detected value for detecting a rich imbalance in air-fuel ratio among cylinders, in a state where an intake air amount of an engine falls within a low amount region, is lower than a first threshold corresponding to the intake air amount and is higher than or equal to a second threshold corresponding to the intake air amount, a hybrid electronic control unit controls the engine such that the intake air amount falls within a high amount region, and controls a motor generator such that electric power corresponding to a power increase amount is consumed. When the intake air amount falls within the high amount region, the hybrid electronic control unit detects a rich imbalance in air-fuel ratio among the cylinders by comparing the detected value with a third threshold corresponding to the intake air amount.


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    Titel :

    Air-fuel ratio imbalance detecting device and air-fuel ratio imbalance detecting method for internal combustion engine of vehicle


    Beteiligte:
    KATO TOSHIKAZU (Autor:in) / FUJITSU YUSUKE (Autor:in)

    Erscheinungsdatum :

    29.12.2015


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

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



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    Engine air to fuel ratio cylinder imbalance diagnostic

    VARNEY BRIAN | Europäisches Patentamt | 2016

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    Diagnostics of Individual Air Fuel Ratio Cylinder Imbalance

    Jammoussi, Hassene / Makki, Imad / Kluzner, Michael et al. | British Library Conference Proceedings | 2017


    Diagnostics of Individual Air Fuel Ratio Cylinder Imbalance

    Jammoussi, Hassene / Makki, Imad / Kluzner, Michael et al. | SAE Technical Papers | 2017