An earlier paper has shown the ability to predict the phasing of knock onset in a gasoline PFI engine using a simple ignition delay equation for an appropriate surrogate fuel made up of toluene and PRF (TPRF). The applicability of this approach is confirmed in this paper in a different engine using five different fuels of differing RON, sensitivity, and composition - including ethanol blends. An Arrhenius type equation with a pressure correction for ignition delay can be found from interpolation of previously published data for any gasoline if its RON and sensitivity are known. Then, if the pressure and temperature in the unburned gas can be estimated or measured, the Livengood-Wu integral can be estimated as a function of crank angle to predict the occurrence of knock. Experiments in a single cylinder DISI engine over a wide operating range confirm that this simple approach can predict knock very accurately. The data presented should enable engineers to study knock or other auto-ignition phenomena e.g. in premixed compression ignition (PCI) engines without explicit chemical kinetic calculations.


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    Titel :

    Knock Prediction Using a Simple Model for Ignition Delay


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Kalghatgi, Gautam (Autor:in) / Algunaibet, Ibrahim (Autor:in) / Morganti, Kai (Autor:in) / Sarathy, Mani (Autor:in) / Dibble, Robert (Autor:in)

    Kongress:

    SAE 2016 World Congress and Exhibition ; 2016



    Erscheinungsdatum :

    2016-04-05




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Assessment of Model-Based Knock Prediction Methods for Spark-Ignition Engines

    Siokos, Konstantinos / Prucka, Robert / He, Zhizhen | SAE Technical Papers | 2017


    Prediction of knock occurrence in a spark-ignition engine

    Chun,K.M. / Heywood,J.B. / Keck,J.C. et al. | Kraftfahrwesen | 1988


    Optimizing engine concepts by using a simple model for knock prediction

    Elmqvist,C. / Lindstroem,F. / Angstroem,H.E. et al. | Kraftfahrwesen | 2003


    Knock in Spark Ignition Engines

    By, A. / Kempinski, B. / Rife, J. M. | SAE Technical Papers | 1981


    Adaptive ignition and knock control

    Holmes,M. / Willcocks,D.A. / Bridgens,B.J. et al. | Kraftfahrwesen | 1988