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Ignitability Experiments in a Fast Burn, Lean Burn Engine
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English
Abstract
This paper demonstrates the first successful use of factorial statistical analysis in quantifying the effect of ignition system parameters on lean operation of a fast burn single cylinder engine. Ignition parameters investigated include plug type, plug number, ignition system, plug location, and ground electrode orientation with respect to the mean swirl generated flow direction. System performance is quantified by analyzing the coefficient of variance of the peak cylinder pressure and the 0-10% mass fraction burn time for various parameter combinations.
To confirm the results from the factorial analysis technique, data from spark angle sweeps at constant flowrates are presented for the basic system and for two promising candidates that were selected from the factorial experiments. These candidates, a multi-ground electrode plug and a surface-air gap plug combined with more ignition energy, are shown to improve engine operation at lean gas-to-fuel ratio.
Finally, a simplified thermodynamic engine model is utilized to predict what specific fuel consumption (ISFC) is attainable with stable operation at lean gas-to-fuel ratio. The value measured at the MBT+1% ISFC level, using the surface-air gap plug and more ignition energy at about 22:1 gas-to-fuel ratio, is found to be within experimental error of the predicted value.
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Authors
Citation
Anderson, R. and Asik, J., "Ignitability Experiments in a Fast Burn, Lean Burn Engine," SAE Technical Paper 830477, 1983, https://doi.org/10.4271/830477.Also In
References
- Dale, J. D. Oppenheim, A. K. “Enhanced Ignition for I. C. Engines with Premixed Charge” SAE Paper 810146 February 1981
- Nohira, Ho Yamada, N. Iwashita, Y. Hattori, T. “A Study of Ignitability Using a Single Compression Machine”, Central States Section Combustion Institute, 1981 Spring Technical Meeting March 1981
- Young, M. B. “Cylic Dispersion in the Homogeneous-Charge Spark-Ignition Engine - A Literature Survey” SAE Paper 810020 February 1981
- Shiomoto, G. H. Sawyer, R. F. Kelly, B. P. “Characterization of the Lean Misfire Limit” SAE Paper 780235 February 1978
- Davis, G. L. Kent, J. C. “Comparison of Model Calculations and Experimental Measurements of the Bulk Cylinder Flow Processes in a Motored PROCO Engine” SAE Paper 790290 March 1979
- Lancaster, D. R. Krieger, R. B. Lienesch, J. H. “Measurement and Analysis of Engine Pressure Data” SAE Paper 750026 February 1975
- Lilley, R. D Asik, J. R. “Supplementary Spark Energy (SSE) Ignition” Ford Research Technical Report SR-81-85 July 15
- Davies, O. L. ed. “The Design and Analysis of Industrial Experiments” Second ed. Longman Group Limited London 1978
- Cochran, W. G. Cox, G. M. “Experimental Designs” Second ed. John Wiley & Sons, Inc. New York 1966
- Rassweiler, G. M. Withrow, L. “Motion Pictures of Engine Flames Correlated with Pressure Cards” SAE Journal (Transactions) 42 5 February 1980
- Yates, F. “Design and Analysis of Factorial Experiments”, Imperial Bureau of Soil Science, London 1937
- Hattori, T. Goto, K. Ohigashi, S. “Study of Spark Ignition in Flowing Lean Mextures” Fuel Economy and Emissions of Lean Burn Engines, I Mech E. Conf. Pub, 1979-9, London June 1979
- Witze, P. O. Vilchis, F. R. “Stroboscopic Laser Shadowgraph Study of the Effect of Swirl on Homogeneous Combustion in a Spark Ignition Engine” SAE Paper 810226 February 1981
- Witze, P. O. “The Effect of Spark Location on Combustion in a Variable-Swirl Engine” SAE Paper 820044 February 1982
- Schwarz, H. “Ignition Systems for Lean Burn Engines” Fuel Economy and Emissions of Lean Burn Engines, I Mech E. Conf. Pub. 1979-9, London June 1979
- Fisher, R. A. “The Design of Experiments” Sixth ed. Oliver and Boyd London and Edinburgh 1951