Single-cylinder engine experiments were used to investigate a fuel reactivity controlled compression ignition (RCCI) concept in both light- and heavy-duty engines and comparisons were made between the two engine classes. It was found that with only small changes in the injection parameters, the combustion characteristics of the heavy-duty engine could be adequately reproduced in the light-duty engine. Comparisons of the emissions and performance showed that both engines can simultaneously achieve NOx below 0.05 g/kW-hr, soot below 0.01 g/kW-hr, ringing intensity below 4 MW/m2, and gross indicated efficiencies above 50 per cent. However, it was found that the peak gross indicated efficiency of the baseline light-duty engine was approximately 7 per cent lower than the heavy-duty engine. The energy balances of the two engines were compared and it was found that the largest factor contributing to the lower efficiency of the light-duty engine was increased heat transfer losses. Detailed CFD modeling was used to explore options to reduce the heat transfer losses of the light-duty engine. It was found that by reducing the swirl ratio from 2.2 to 0.7, increasing the engine speed from 1900 to 2239 rev/min, and improving the combustion chamber geometry, the heat transfer losses in the light-duty engine could be reduced by the equivalent of 2 per cent of the fuel energy. The modeling showed that light duty engine could achieve 53 per cent gross indicated efficiency, while maintaining near-zero NOx and soot, and an acceptable ringing intensity.


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    Titel :

    Fuel Reactivity Controlled Compression Ignition (RCCI) Combustion in Light- and Heavy-Duty Engines


    Weitere Titelangaben:

    Sae Int. J. Engines


    Beteiligte:
    Splitter, Derek (Autor:in) / Kaddatz, John (Autor:in) / Hanson, Reed (Autor:in) / Reitz, Rolf D. (Autor:in) / Kokjohn, Sage (Autor:in)

    Kongress:

    SAE 2011 World Congress & Exhibition ; 2011


    Erschienen in:

    Erscheinungsdatum :

    12.04.2011


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Fuel Reactivity Controlled Compression Ignition (RCCI) Combustion in Light- and Heavy-Duty Engines

    Kokjohn, S. / Hanson, R. / Splitter, D. et al. | British Library Conference Proceedings | 2011


    Fuel Effects on Reactivity Controlled Compression Ignition (RCCI) Combustion at Low Load

    Splitter, Derek / Hanson, Reed / Reitz, Rolf D. et al. | SAE Technical Papers | 2011


    Fuel Effects on Reactivity Controlled Compression Ignition (RCCI) Combustion at Low Load

    Hanson, R. / Kokjohn, S. / Splitter, D. et al. | British Library Conference Proceedings | 2011