Net heat release rates and knock characteristics were derived from in-cylinder pressures for different fuels in a single-cylinder engine; the effect of an ashless antiknock, N-methyl aniline (NMA) was also studied. The maximum net heat release rate (MHRR) resulting from the final high-temperature chemistry determines the knock intensity. Paraffinic fuels have similar knock intensities at comparable knock occurrence frequencies. Aromatic fuels have significantly lower MHRRs and give much lower mean knock intensities for a given knock occurrence frequency compared to paraffinic fuels. Adding NMA to a paraffinic fuel increases the spark advance required to get a chosen frequency of knock occurrence as it increases the octane number of the fuel but has little effect on MHRR and hence knock intensity.


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    Titel :

    Heat Release and Knock in Paraffinic and Aromatic Fuels and the Effect of an Ashless Anti-knock Additive


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    1995 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1995



    Erscheinungsdatum :

    01.10.1995




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :



    The Autoignition Chemistry of Paraffinic Fuels and Pro-Knock and Anti-Knock Additives: A Detailed Chemical Kinetic Study

    Westbrook, Charles K. / Pitz, William J. / Leppard, William R. | SAE Technical Papers | 1991


    Anti-Knock Qualities in Fuels

    Morley, A.W. | Emerald Group Publishing | 1933


    Knock Rating of Motor Fuels

    Barton, C. H. / Sprake, C. H. / Thornycroft, O. et al. | SAE Technical Papers | 1931


    THE KNOCK RATINGS OF FUELS

    Walsh, A. D. | NTRS | 1963