This paper presents an original procedure for misfire detection in a high-performance 12-cylinder engine, based on the analysis of the time periods between subsequent combustions.A detailed analysis of the misfire effects on the engine crank-shaft instantaneous speed is presented, then a misfire detection procedure is designed, based on the misfire pattern recognition.The capability of this methodology was then validated under the worst case condition of a random misfire in several tests performed with the vehicle running on a circular race-track, at low and high load, in different gear, under acceleration and during a normal urban cycle.The results obtained are very interesting because the misfire pattern recognition works well even during cut-off or gear shifts, avoiding false alarm due to the strong influence that these phenomena have on crank-shaft dynamics.In conclusion same considerations have been done about the procedure capability of detecting more than one misfire within the same cycle.


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    Titel :

    Misfire Pattern Recognition in High Performance SI 12-Cylinder Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Moro, Davide (Autor:in) / Minelli, Giorgio (Autor:in) / Azzoni, Piero (Autor:in)

    Kongress:

    International Congress & Exposition ; 1998



    Erscheinungsdatum :

    23.02.1998




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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