The frequency of the pressure oscillations caused by spark knock depends on the temperature-dependent speed of sound in the combustion gases. Engine dynamometer tests showed a 6.5% (390 Hz) reduction in the knock fundamental frequency as the air/fuel ratio was swept from 13:1 to 20:1. Engine cycle simulation model predictions of maximum burned gas temperatures correlate well with the data. A robust knock detection system must be insensitive to the range of burned gas temperature (frequency of pressure oscillations) that will be encountered with a particular engine control system operating under the expected range of fuels and environmental conditions.


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    Titel :

    Detection of Spark Knock Oscillations: Dependence on Combustion Temperature


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Scholl, David (Autor:in) / Russ, Stephen (Autor:in) / Stockhausen, William (Autor:in)

    Kongress:

    International Congress & Exposition ; 1997



    Erscheinungsdatum :

    1997-02-24




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Detection of spark knock oscillations: dependence on combustion temperature

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    knock-knock: Spark Knock, Wild Ping, or Rumble?

    Lowther, H. V. / Perry, R. H. | SAE Technical Papers | 1959


    Knock knock -- Spark knock, wild ping or rumble?

    Perry, Jr., R.H. / Lowther, H.V. | Engineering Index Backfile | 1958


    Adaptive Spark Control with Knock Detection

    Kizer, T. / Boccadoro, Y. | SAE Technical Papers | 1984


    Adaptive Spark Control with Knock Detection

    Boccadoro,Y. / Kizer,T. / Renault,FR et al. | Kraftfahrwesen | 1984