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Effects of Spark Location and Combustion Duration on Nitric Oxide and Hydrocarbon Emissions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1973 by SAE International in United States
Annotation ability available
This study describes the effect of spark plug location on NO and HC emissions from a single-cylinder engine with a specially modified combustion chamber. The effects of changes in combustion duration caused either by spark location, dual spark plugs, or charge dilution on NO and HC emissions were also examined. Experiments were run at constant speed, constant load, and mbt spark timing.
Nitric oxide emissions were the same with the spark plug located either near the intake or exhaust valve, but were higher with the spark plug midway between the valves or with dual ignition. Hydrocarbon emissions were lowest with the spark plug nearest the exhaust valve and increased with the distance of the spark plug from the exhaust valve. With charge dilution the decrease in NO emission was isolated into a pure dilution effect and a combustion duration effect. The combustion duration effect was minimal at rich mixtures and increased with air-fuel ratio. The implications of these results are presented and discussed.
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CitationQuader, A., "Effects of Spark Location and Combustion Duration on Nitric Oxide and Hydrocarbon Emissions," SAE Technical Paper 730153, 1973, https://doi.org/10.4271/730153.
SAE 1973 Transactions
Number: V82-A; Published: 1975-01-01
Number: V82-A; Published: 1975-01-01
- Huls T. A. Nickol H. A. “Influence of Engine Variables on Exhaust Oxides of Nitrogen Concentrations from a Multi-Cylinder Engine.” Paper 670482 presented at SAE Mid-Year Meeting Chicago May 1967
- Aiman W. R. “Engine Speed and Load Effects on Charge Dilution and Nitric Oxide Emissions.” Paper 720256 presented at SAE International Automotive Engineering Congress Detroit January 1972
- Benson J. D. Stebar R. F. “Effects of Charge Dilution on Nitric Oxide Emissions from a Single-Cylinder Engine.” SAE Transactions 80 1971 710008
- Daniel W. A. “Why Engine Variables Affect Exhaust Hydrocarbon Emissions.” SAE Transactions 79 1970 700108
- Lavoie G. A. Heywood J. B. Keck J. C. “Experimental and Theoretical Study of Nitric Oxide Formation in Internal Combustion Engines.” Comb. Sci. & Tech. 1 1970 313
- Starkman E. S. Stewart H. E. Zvonow V. A. “An Investigation into the Formation and Modification of Emission Precursors.” Paper 690020 presented at SAE Automotive Engineering Congress Detroit January 1969
- Muzio L. J. Starkman E. S. Caretto L. S. “The Effect of Temperature Variation in the Engine Combustion Chamber on Formation and Emission of Nitrogen Oxides.” SAE Transactions 80 1971 710158
- Heywood J. B. Mathews S. M. Owen B. “Prediction of Nitric Oxide Concentrations in a Spark-Ignition Engine Compared with Exhaust Measurements.” Paper 710011 presented at SAE Automotive Engineering Congress Detroit January 1971
- Muzio L. Newhall H. K. Starkman E. S. “Spatial and Temporal History of Nitrogen Oxides in the Spark-Ignition Combustion Chamber.” Paper C138/71, Conf. on Air Poll. Cont. in Transport Engines Inst, of Mech. Engineers November 1971
- Blumberg P. Kummer J. T. “Prediction of NO Formation in Spark-Ignited Engines-An Analysis of Methods of Control.” Comb. Sci. & Tech. 4 1971 73
- Quader A. A. “Why Intake Charge Dilution Decreases Nitric Oxide Emission from Spark-Ignition Engines.” SAE Transactions 80 1971 710009
- D'Alleva B. A. “Procedure and Charts for Estimating Exhaust Gas Quantities and Compositions.” GMR-372 Research Laboratories Publication General Motors Corp. 1960
- Friedman R. “The Quenching of Laminar Oxyhydrogen Flames by Solid Surfaces.” Third Symposium on Combustion, Flame and Explosion Phenomena Williams and Wilkins Co. 1949 110
- Sirignano W. A. “One-Dimensional Analysis of Combustion in a Spark-Ignition Engine.” Paper 719010, Proceedings of the Intersociety Energy Conversion Conf. 38 New York Society of Automotive Engineers Inc. 1971
- Wentworfh J. T. “Effect of Combustion Chamber Surface Temperature on Exhaust Hydrocarbon Concentration.” SAE Transactions 80 1971 710587
- Hansel J. G. “Low NO x Emissions from Automotive Engine Combustion.” Paper 720509 presented at SAE National Automobile Engineering Meeting Detroit May 1972
- Hansel J. G. “Lean Automotive Engine Operation-Hydrocarbon Exhaust Emissions and Combustion Characteristics.” SAE Transactions 80 1971 710164