A reduction of engine knock intensity is demonstrated by incorporation of a stepped piston top to provide an abrupt increase in flame front area in an ASTM-CFR octane rating engine. The conclusions are based on several different types of knock measurements. Three different piston designs were tested.Decreases in the knock intensity, the magnitude of the pressure oscillations following knock, of up to 40% were realized. The statistical nature of knock is shown to be somewhat different from a normal distribution. The data have more scatter, particularly toward the high side of the mean value.


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    Titel :

    Knock (Detonation) Control by Engine Combustion Chamber Shape


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Fletcher, E. A. (Autor:in) / Benson, G. (Autor:in) / Scherrer, H. C. (Autor:in) / Murphy, T. E. (Autor:in)

    Kongress:

    SAE International Congress and Exposition ; 1983



    Erscheinungsdatum :

    01.02.1983




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Knock ( detonation ) control by engine combustion chamber shape

    Benson,G. / Fletcher,E.A. / Murphy,T.E. et al. | Kraftfahrwesen | 1983


    Engine knock and combustion chamber form

    Zinner, Karl | TIBKAT | 1939



    Combustion-Chamber Deposition and Knock

    Hall, C.A. / Hirschler, D.A. / Gibson, H.J. | SAE Technical Papers | 1953


    Combustion-chamber deposition and knock

    Gibson, H.J. / Hall, C.A. / Hirschler, D.A. | Engineering Index Backfile | 1953