The fiber optic spark plug was used in conjunction with a piezoelectric pressure transducer to collect combustion diagnostic data on four production engines designed to generate quiescent, swirl, and tumble charge motions. Spark advance was varied under low speed, low load conditions to investigate changes in flame kernel behavior and in-cylinder charge motion as functions of crank angle and spark advance. Two flame kernel models were filled to the data and a critical comparison of the models was conducted. Flame kernel behavior was represented by three values: convection velocity, growth rate, and convection direction. Convection velocity was highest in the swirl chambers. It also varied considerably among cylinders in the same engine. Growth rate correlated well with 0-2% burn but showed negligible correlations with later burn or IMEP. Convection direction proved useful in determining flow direction near the plug. Furthermore, changing flow characteristics, such as tumble breakup and turbulence generation, were evident from the fiber optic data as functions of crank angle degree, implying that the fiber optic spark plug may have increased diversity as a diagnostic tool.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    The Effects of Charge Motion on Early Flame Kernel Development


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1993



    Publication date :

    1993-03-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    The effects of charge motion on early flame kernel development

    anderson,R. / Lord,D.L. / Brehob,D.D. et al. | Automotive engineering | 1993


    Effect of Charge Motion of Flame Kernel Behavior and Flame Propagation

    Lee, K.-H. / Park, D.-K. / Kim, C.-S. | British Library Conference Proceedings | 1995


    Turbulence effects on early flame kernel growth

    Ho,C.M. / Santavicca,D.A. / The Pennsylvania State Univ.,US | Automotive engineering | 1987


    Turbulence Effects on Early Flame Kernel Growth*

    Ho, C.M. / Santavicca, D.A. | SAE Technical Papers | 1987


    The Effects of Initial Flame Kernel Conditions on Flame Development in SI Engine

    Heywood, John B. / Cheng, Wai K. / Bianco, Yvan | SAE Technical Papers | 1991