This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Piston Heat Transfer Measurements Under Varying Knock Intensity in a Spark-Ignition Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 01, 1997 by SAE International in United States
Annotation ability available
Piston heat transfer measurements were taken under varying knock intensity in a modern spark-ignition engine combustion chamber. For a range of knocking spark timings, two knock intensity levels were obtained by using a high (80°C) and a low (50°C) cylinder head coolant temperature. Data were taken with a central and a side spark plug configuration. When the spark-plug was placed at the center of the combustion chamber, a linear variation of peak heat flux with knock intensity was found in the end-gas region. Very large changes in peak heat flux (on the order of 100%) occurred at probes whose relative location with respect to the end gas zone changed from being within (80°C coolant case) to being outside the zone (50°C coolant case). With side spark-plug, distinct differences in peak heat flux occurred at all probes and under all knock intensities, but the correlation between knock intensity and heat flux was not linear. It can be concluded that local heat flux correlates strongly with knock intensity, provided that the heat transfer mechanisms set-up by autoignition remain the same while altering knock intensity level.
CitationSyrimis, M. and Assanis, D., "Piston Heat Transfer Measurements Under Varying Knock Intensity in a Spark-Ignition Engine," SAE Technical Paper 971667, 1997, https://doi.org/10.4271/971667.
- Ricardo, H. R. The High-Speed Internal Combustion Engine 2nd Blackie and Son Limited London 1931
- Lee, W. Schaefer, H. J. “Analysis of Local Pressures, Surface Temperatures and Engine Damages under Knock Conditions,” SAE Paper 830508 1983
- Woschni, G. Fieger, J. “Experimental Investigation of the Heat Transfer at Normal and Knocking Combustion in Spark Ignition Engines,” MTZ 43-2 1982-2 63 67 1982
- Lu, J. H. Ezekoye, D. Iiyama, A. Greif, R. Sawyer, R. F. “Effect of Knock on Time-Resolved Engine Heat Transfer,” SAE Paper 890258 1989
- Harigaya, Y. Fujio, T. Ohyagi, S Tsuji, H. “Surface Temperature and Wall Heat-Flux in a Spark Ignition Engine under Knocking and Non-Knocking Conditions,” SAE Paper 891795 1989
- Enomoto Y. Kitahara, N. Takai, M. “Heat Losses during Knocking in a Four-Stroke Gasoline Engine,” JSME International Journal Series B 37 3 668 676 1994
- Syrimis, M. Shigahara, K. Assanis, D. N. “Correlation Between Knock Intensity and Heat Transfer Under Light and Heavy Knocking Conditions,” SAE Paper 960495 1996
- Syrimis, M. “Characterization of Knocking Combustion and Heat Transfer in a Spark-Ignition Engine,” University of Illinois at Urbana-Champaign Urbana 1996
- Heywood, J. B. Internal Combustion Engine Fundamentals McGraw Hill Book Co. New York 1988
- Draper, C. S. “Pressure Waves Accompanying Detonation in the Internal Combustion Engine,” Journal of the Aeronautical Sciences 5 6 April 1938
- Alkidas, A. C. “Heat Transfer Characteristics of a Spark-Ignition Engine,” ASME Journal of Heat Transfer 102 189 193 1980
- Frazier, T. R. “Development and Comparison of One and a Two-zone Heat Release Models for Combustion Diagnostics and Knock Analysis,” University of Illinois at Urbana-Champaign Urbana 1995