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Predicting NOx Emissions and Effects of Exhaust Gas Recirculation in Spark-Ignition Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1973 by SAE International in United States
Annotation ability available
An improved theoretical model that predicts the nitric oxide concentration in the exhaust of a spark-ignition engine has been evaluated over a wide range of fuel-air ratios, percentage of exhaust gas recycled, and engine speed. Experiments were carried out in a standard CFR single-cylinder engine. Comparison of the measured and calculated exhaust nitric oxide concentrations shows good agreement over all operating conditions. It is shown that in lean mixtures, nitric oxide concentrations freeze early in the expansion stroke. For rich mixtures, freezing occurs later after all the charge has been burned and substantial nitric oxide decomposition takes place. In addition, effects of exhaust gas recirculation on flame speed, ignition delay, and cycle-to-cycle pressure variations were evaluated. A simple model relating cycle-to-cycle variations with changes in ignition delay is presented.
CitationKomiyama, K. and Heywood, J., "Predicting NOx Emissions and Effects of Exhaust Gas Recirculation in Spark-Ignition Engines," SAE Technical Paper 730475, 1973, https://doi.org/10.4271/730475.
- Quader A. A., “Effects of Spark Location and Combustion Duration on Nitric Oxide and Hydrocarbon Emissions.” Paper 730153 presented at SAE Automotive Engineering Congress, Detroit, January 1973.
- Rassweiller G. M. and Withrow L., “Flame Temperatures Vary with Knock and Combustion Chamber Position.” SAE Transactions, Vol. 36 (1935), p. 125.
- Alperstein M. and Bradow R. L., “Exhaust Emissions Related to Engine Combustion Reactions.” SAE Transactions, Vol. 75 (1967), paper 660781.
- Newhall H. K. and Starkman E. S., “Direct Spectroscopic Determination of Nitric Oxide in Reciprocating Engine Cycles.” SAE Transactions, Vol. 76 (1967), paper 670122.
- Eyzat P. and Guibet J. C., “A New Look at Nitrogen Oxides Formation in Internal Combustion Engines.” SAE Transactions, Vol. 77 (1968), paper 680124.
- Starkman E. S., Stewart H. E., and Zvunow V. A., “An Investigation into the Formation and Modification of Emission Precursors.” Paper 690020 presented at SAE Automotive Engineering Congress, Detroit, January 1969.
- Lavoie G. A., Heywood J. B., and Keck J. C., “Experimental and Theoretical Study of Nitric Oxide Formation in Internal Combustion Engines.” Combustion Science and Technology, Vol. 1 (1970), pp. 313-326.
- Lavoie G. A., “Spectroscopic Measurements of Nitric Oxide in Spark Ignition Engines.” Combustion and Flame, Vol. 15 (1970), pp. 97-108.
- Heywood J. B., Mathews S. M., and 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., Starkman E. S., and Caretto L. S., “The Effects of Temperature Variations in the Engine Combustion Chamber on Formation and Emissions of Nitrogen Oxides.” SAE Transactions, Vol. 80(1971), paper 710158.
- Blumberg P. and Kummer J. K., “Prediction of NO Formation in Spark-Ignited Engines-An Analysis of Methods of Control,” Comb. Sci. & Tech., Vol. 4(1971), p. 73.
- Newhall H. K., “Control of Nitrogen Oxides by Exhaust Recirculation-A Preliminary Theoretical Study.” SAE Transactions, Vol. 76 (1967), paper 670495.
- Nichols J. E., El-Messiri I. A., and Newhall H. K., “Inlet Manifold Water Injection for Control of Nitrogen Oxides-Theory and Experiments.” SAE Transactions, Vol. 73 (1969), paper 690018.
- Newhall H. K., “Kinetics of Engine-Generated Nitrogen Oxides and Carbon Monoxide.” Twelfth Symposium (International) on Combustion, 1969, pp. 603-613.
- Blizard N. C., “Experimental Verification of a Burning Model for Internal Combustion Engines.” S.M. Thesis, M.I.T., February 1973.
- Walker G., “Heat Transfer in Gasoline Engine.” The Engineer, November 24, 1967, pp. 690-695.
- Baulch D. L., Drysdale D. D., Horne D. G., and Lloyd A. C., “Critical Evaluation of Rate Data for Homogeneous, Gas Phase Reactions of Interest in High-Temperature Systems.” No. 4, Dept. of Physical Chemistry, Leeds University, U.K., December 1969.
- Campbell I. M. and Thrush B. A., “Reactivity of Hydrogen to Atomic Nitrogen and Atomic Oxygen.” Trans. Faraday Soc., Vol. 64, Part 5 (1968), pp. 1265-1274.
- Benson J. D., “Effects of Charge Dilution on Nitric Oxide Emission from a Single-Cylinder Engine.” SAE Transactions, Vol. 80(1971), paper 710008.
- Aiman W. R., “A Critical Test for Models of the Nitric Oxide Formation Process in Spark-Ignition Engines.” Paper presented at Fourteenth Symposium on Combustion, The Combustion Institute, Pennsylvania State University, August 20-25, 1972.
- Campau R. M., “Low Emission Concept Vehicles.” SAE Transactions, Vol. 80 (1971), paper 710294.
- Hansel J. G., “A Turbulent Combustion Model of Cycle to Cycle Combustion Variations in Spark Ignition Engines.” Combustion Science and Technology, Vol. 2, No. 4, December 1970.
- Fremont H. A., ed., “Properties of Combustion Gases, System: CnH2n-Air.” General Electric Co., 1955.
- JANAF Thermochemical Tables, National Bureau of Standards Publication NSRDS-NBS 37, 1971.
- Eichelberg E., “Some New Investigations on Old Combustion Engine Problems.” Engineering, Vol. 148 (1939).