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TECHNICAL PAPERS: Internal Combustion Engines

Methods for Specific Emission Evaluation in Spark Ignition Engines Based on Calculation Procedures of Air-Fuel Ratio: Development, Assessment, and Critical Comparison

[+] Author and Article Information
Stefano d’Ambrosio, Ezio Spessa, Alberto Vassallo

Dipartimento di Energetica IC Engines Advanced Laboratory, Politecnico di Torino, Corso Duca degli Abruzzi, 24, Torino 10129, Italy

J. Eng. Gas Turbines Power 127(4), 869-882 (Sep 20, 2005) (14 pages) doi:10.1115/1.1852566 History: Received October 24, 2003; Revised June 01, 2004; Online September 20, 2005
Copyright © 2005 by ASME
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References

“Test Procedure for the Measurement of Exhaust Emissions From Small Utility Engines,” SAE J1088, SAE Recommended Practice, 1983.
“Reciprocating Internal Combustion Engines—Exhaust Emission Measurement,” ISO 8178, 1996.
Simons,  W., 1985, “Berechnungen zur Bestimmung der Luftzahl bei Ottomotoren,” MTZ Motortechnische Zeitschrift, 46(7/8), pp. 257–259.
Silvis, M. W., 1997, “An Algorithm for Calculating the Air/Fuel Ratio From Exhaust Emissions,” SAE Paper No. 970514.
Fukui, T., Tamura, Y., Omori, S., and Saitoh, S., 1989, “Accuracy of A/F Calculation From Exhaust Gas Composition of SI Engines,” SAE Paper No. 891971.
Brettschneider, J., 1997, “Extension of the Equation for Calculation of the Air-Fuel Equivalence Ratio,” SAE Paper No. 972989.
Spindt, R. S., 1965, “Air Fuel Ratios From Exhaust Gas Analysis,” SAE Paper No. 650507.
Heywood, J. B., 1988, Internal Combustion Engine Fundamentals, McGraw–Hill, New York.
Patterson, D. J., and Henein, N. A., 1972, Emissions from Combustion Engines and Their Control (Ann Arbor Science, Ann Arbor, MI).
Catania,  A. E., Misul,  D., Spessa,  E., and Martorana,  G., 2001, “Conversion of a Multivalve Gasoline Engine to Run on CNG,” SAE 2000 Transactions, Journal of Engines,109, pp. 809–817.
Catania,  A. E., d’Ambrosio,  S., Mittica,  A., and Spessa,  E., 2002, “Experimental Investigation of Fuel Consumption and Exhaust Emissions of a 16V Pent-Roof Engine Fueled by Gasoline and CNG,” SAE 2001 Transactions, Journal of Engines,110, pp. 1213–1233.
Jääskeläinen, H. E., and Wallace, J. S., 1993, “Performance and Emissions of a Natural Gas-Fueled 16 Valve DOHC Four-Cylinder Engine,” SAE Paper No. 930380.

Figures

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Exhaust mass flow rates and variations from ṁexh,UEGO for gasoline and CNG operations
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Estimated λ for gasoline (a) and CNG (b) operations
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Exhaust averaged molecular mass for gasoline (a) and CNG (b) operations
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Comparison among different NOx emission corrections
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Brake specific emissions for gasoline and CNG operations

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