An inter-cylinder air-fuel ratio variation abnormality detection apparatus is disclosed. The apparatus determines imbalance of an air-fuel ratio among the cylinders based on a difference between index values correlated with crank angular velocities detected in a set of opposite cylinders belonging to different banks and having crank angles different from one another by 360°; and carries out an air-fuel ratio feedback process for controlling an amount of injected fuel for each of the banks, wherein the apparatus comprises a correction unit correcting, before determining the air-fuel ratio imbalance, the difference between the index values in a direction of combustion improvement for opposite cylinders that are opposite to cylinders belonging to a bank identical to a bank of a cylinder with the most deviating index value from a standard value among all the cylinders and being other than the cylinder with the most deviating index value.


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    Titel :

    Inter-cylinder air-fuel ratio variation abnormality detection apparatus for multicylinder internal combustion engine


    Beteiligte:
    ODA YOSHIHISA (Autor:in) / NAKAJIMA ISAO (Autor:in) / HAKARIYA MASASHI (Autor:in) / KATAYAMA AKIHIRO (Autor:in) / AKISADA KAZUHIRO (Autor:in) / MARUTA SEI (Autor:in) / INSIXIENGMAI LEUTH (Autor:in) / NAKAGOSHI SHINICHI (Autor:in) / OKADA MASAHIDE (Autor:in)

    Erscheinungsdatum :

    04.08.2015


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen



    Apparatus for detecting imbalance abnormality in air-fuel ratio between cylinders in multi-cylinder internal combustion engine

    KATAYAMA AKIHIRO / AKISADA KAZUHIRO / INSIXIENGMAI LEUTH et al. | Europäisches Patentamt | 2016

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