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High-Frequency Ignition Characteristics in a 4-Valve SI Engine with Tumble-Swirl Flows
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 04, 1998 by SAE International in United States
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A high-frequency ignition system was developed to improve the stability of initial flame development under the lean burn condition. The electrical principle of the high-frequency ignition system is based on successive spark discharges in a spark plug. The ignition system provides electronically controlled charges in spark duration (1∼2msec) and restriking rates (10∼30kHz). Flow characteristics of tumble-swirl were varied with swirl control valve attached at the inlet ports. Four different flow patterns were tested by the combination of tumble and swirl strengths achieved by various shapes of swirl control valve.
The effects of flow and ignition characteristics on the combustion performances and their interaction were investigated in a 4-valve SI engine. Flow characteristics were quantified by steady flow tests and in-cylinder flow measurements. Ignition energy and its distribution were measured through voltage and current measurements, and controlled in a high-frequency ignition system by changing spark duration and sparking frequency. Combustion performances were evaluated by pressure analyses and imaging of initial flame propagation with an ICCD camera in a single-cylinder optical engine. The improvement of lean burn performance by the optimum flow and ignition characteristics was found. High-frequency ignition enables successful ignition followed by stable flame development in highly turbulent strong flow field such as inclined tumble/swirl due to the supply of successive ignition energies resulting in the increased kernel volume. Longer spark duration, higher primary voltage and optimal discharge frequency(20KHz) provided better lean burn performances.
CitationBae, C., Lee, J., and Ha, J., "High-Frequency Ignition Characteristics in a 4-Valve SI Engine with Tumble-Swirl Flows," SAE Technical Paper 981433, 1998, https://doi.org/10.4271/981433.
Combustion and Emission Formation in SI and Diesel Engines
Number: SP-1370; Published: 1998-05-04
Number: SP-1370; Published: 1998-05-04
- Kalghatgi, G.T. “Spark Ignition, Early Flame Development and Cyclic Variation in IC Engines,” SAE Paper 870163 1987
- Swords, M.D. Kalghatgi, G.T. Watts, A.J. “An Experimental Study of Ignition and Flame Development in a Spark Ignition Engine,” SAE Paper 821220 1982
- Keck, J.C. Heywood, J.B. Noske, G. “Early Flame Development and Burning Rates in Spark Ignition Engines and their Cyclic Variability,” SAE Paper 870164 1987
- Hamai, K. Kawajiri, H. Ishizuka, T. Nakai, M. “Combustion Fluctuation Mechanism Involving Cycle-to-cycle Spark Ignition Variation due to Gas Flow Motion in SI Engines,” 21th Symposium on Combustion 1986
- Maly, R.R. “Spark Ignition; its Physics and Effect on the Internal Combustion Process,” Ch.3 in ‘Fuel Economy in Road Vehicles Powered by Spark Ignition Engines’ Hilliard J.C. Springer G.S. Plenum, New York 1984
- Kline, P.C. “Some Factors to Consider in the Design and Application of Automotive Ignition System,” SAE Paper 700083 1970
- Tanuma, T. Sakai, K. Kaneto, T. Kawasaki, H. “Ignition, Combustion and Exhaust Emissions of Lean Mixtures in Automotive Spark Ignition Engines,” SAE Paper 710159 1971
- Ballal, D.R. Lefebvre, A.H. “The Influence of Spark Discharge Characteristics on Minimum Ignition Energy in Flowing Gases,” Combustion and Flame 24 99 1975
- Kono, M. Inuma, K. Sakai, T. Kumagai, S. “Spark Discharge Characteristics and Ignition Ability of Capacitor Discharge Ignition Systems,” Combustion Science and Technology 19 1978
- Hancock, M.S. Buckingham, D.J. Belmont, M.R. “The Influence of Arc Parameters on Combustion in a Spark Ignition Engine,” SAE Paper 860321 1986
- Arcoumanis, C. Bae, C.S. “Correlation between Spark Ignition Characteristics and Flame Development in a Constant-Volume Combustion Chamber,” SAE Paper 920413 1992
- Warner, R.S. “Multiple Discharge-A More Effective Ignition,” ASME 1970
- Asik, J.R. Bates, B. “The Ferroresonant Capacitor Discharge Ignition(FCDI) System: A Multiple Firing CD Ignition With Spark Discharge Sustaining between Firings,” SAE Paper 760266 1976
- Lancaster, D.R. Keriger, R.B. Sorenson, S.C. Hull, W.L. “Effects of Turbulence on Spark-Ignition Engine Combustion,” SAE Paper 760160 1976
- Gatowski, J.A. Heywood, J.B. Deleplace, C. “Flame Photographs in a Spark-Ignition Engine,” Combustion and Flame 56 1984
- Soete De “Effects of Geometrical and Aerodynamic induced Flame Stretch on the Propagation of Spark Fired Premixed Flames in Early Stages,” 20th Symposium on Combustion 1984
- Arcoumanis, C. Bae, C.B. Hu, Z. “Flow and Combustion in a Four-Valve, Spark-Ignition Optical Engine,” SAE Paper 940475 1994
- Kang, K.Y. Oh, S.M. Lee, J.W. Lee, K.H. Bae, C.S. “The Effects of Tumble Flow on Lean Burn Characteristics in a Four-Valve SI Engine,” SAE Paper 970791 1997
- Kang, K.Y. Lee, J.W. “The Effects of Intake Port Entry Angle on Tumble and Turbulence in a Four-Valve Engines,” SAE paper 971328 481 486 1997
- Kim, J.Y. Lee, J.S. Chung, S.S. Ha, J.Y. Bae, C.S. “Effects of Flow and High Frequency Ignition Characteristics in the Engine Performance,” 152 159 Proc. KSAE Spring Conference 1997
- Bae, C.S. Lee, J.H. Kang, K.Y. Oh, S.M. “The Effects of Intake Port Design on Flame Propagation in a Lean Burn Spark-Ignition Engine,” SAE paper 971300 303 307 1997