The paper studied the burn rate of fuels in the CFR engine at standard knock intensity. Burn duration was found to increase with compression ratio, and knocking pressure traces exhibited a distinct change in slope, thought to be the onset of knock. A criterion was developed to identify this knock-point. The knock-point was related to the mass fraction bunt and it was found that the mass fraction burnt at the knock-point decreases as the compression ratio decreases, to as little as 30%. It is proposed that the nature of knock in the CFR engine is unique in that a large fraction of the trapped mass participates in the autoignition. The paper also presented a functional descriptor for the mass fraction burnt and illustrated the suitability thereof through the application in an engine model.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Standard Knock Intensity Revisited: Atypical Burn Rate Characteristics identified in the CFR Octane Rating Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Swarts, André (Autor:in) / Yates, Andy (Autor:in) / Viljoen, Carl (Autor:in) / Coetzer, Roelof (Autor:in)

    Kongress:

    2004 SAE Fuels & Lubricants Meeting & Exhibition ; 2004



    Erscheinungsdatum :

    2004-06-08




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :



    A Further Study of Inconsistencies between Autoignition and Knock Intensity in the CFR Octane Rating Engine

    Swarts, Andre / Yates, Andy / Viljoen, Carl et al. | SAE Technical Papers | 2005



    Bridging the Knock Severity Gap to CFR Octane Rating Engines

    Swarts, Andre / Kalaskar, Vickey | British Library Conference Proceedings | 2020


    Bridging the Knock Severity Gap to CFR Octane Rating Engines

    Swarts, Andre / Kalaskar, Vickey | British Library Conference Proceedings | 2020