We propose a simple, physically oriented model that explains important characteristics of cyclic combustion variations in spark-ignited engines. A key model feature is the interaction between stochastic, small-scale fluctuations in engine parameters and nonlinear deterministic coupling between successive engine cycles. Prior-cycle effects are produced by residual cylinder gas which alters volume-average in-cylinder equivalence ratio and subsequent combustion efficiency. The model's simplicity allows rapid simulation of thousands of engine cycles, permitting in-depth statistical studies of cyclic variation patterns. Additional mechanisms for stochastic and prior-cycle effects can be added to evaluate their impact on overall engine performance. We find good agreement with our experimental data.


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    Titel :

    A Simple Model for Cyclic Variations in a Spark-Ignition Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Finney, C. E. A. (Autor:in) / Daw, C. S. (Autor:in) / Connolly, F. T. (Autor:in) / Green, J. B. (Autor:in) / Thomas, J. F. (Autor:in) / Kennel, M. B. (Autor:in)

    Kongress:

    1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1996



    Erscheinungsdatum :

    01.10.1996




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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