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Why Engine Variables Affect Exhaust Hydrocarbon Emission
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Abstract
The relative importance of several internal environmental factors known to affect the hydrocarbons exhausted by an engine has been studied using an analytical model of the emission process.
The model included A: two sources of unburned fuel resulting from wall quenching of the flame, 1) the walls of the open part of the chamber, and 2) the crevices separated from the open part of the chamber by restrictive passages; and B: three subsequent effects, 1) the oxidation of unburned fuel in the chamber after flame propagation, 2) the preferential exhausting of the burned products from the chamber and 3) the oxidation of unburned fuel in the exhaust system.
Results obtained by empirically fitting the model to measured exhaust hydrocarbon concentrations for systematic changes in five operating variables indicated that different environmental factors predominated in causing the different variable effects.
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Citation
Daniel, W., "Why Engine Variables Affect Exhaust Hydrocarbon Emission," SAE Technical Paper 700108, 1970, https://doi.org/10.4271/700108.Also In
References
- Wentworth J. T. Daniel W. A. “Flame Photographs of Light Load Combustion Point the Way to Reduction of Hydrocarbons in Exhaust Gas.” SAE Technical Progress Series 6 “Vehicle Emissions,” New York Society of Automotive Engineers, Inc. 1964
- Daniel W. A. “Flame Quenching at the Wall of an Internal Combustion Engine.” Sixth Symposium (International) on Combustion Yale University, New Haven, Connecticut, Reinhold Publishing Co. 1956
- Shinn J. N. Olson D. R. SAE Technical Progress Series 6 New York Society of Automotive Engineers, Inc. 1964
- Daniel W. A. Wentworth J. T. SAE Technical Progress Series 6 “Vehicle Emissions,” New York Society of Automotive Engineers, Inc. 1964
- Wentworth J. T. “Piston and Ring Variables Affect Exhaust Hydrocarbon Emissions.” “Fuels and Lubricants 1968 Papers,” New York Society of Automotive Engineers, Inc. 1969 paper 680109
- Daniel W. A. “Engine Variable Effects on Exhaust Hydrocarbon Composition (A Single-Cylinder Engine Study with Propane as the Fuel).” SAE Transactions 76 paper 670124
- Huls T. A. Myers P. S. Uyehara O. A. “Spark Ignition Engine Operation and Design for Minimum Exhaust Emission.” Progress in Technology 12 “Vehicle Emissions-Part II,” New York Society of Automotive Engineers, Inc. 1967
- Green K. A. “Quenching Distances of Propane-Air Flames at High Pressures and Several Mixture Ratios.” Drexel Inst. of Tech. June 1969
- Friedman R. Johnston W. C. “The Wall-Quenching of Laminar Propane Flames as a Function of Pressure, Temperature, and Air-Fuel Ratio.” J. Appl. Phys. 21 1950 919
- Fenn J. B. Calcote H. F. Fourth Symposium (International) on Combustion The Combustion Institute 1953 231
- Hottel H. C. Williams G. C. Nerheim N. M. Schneider G. R. “Kinetic Studies in Stirred Reactors: Combustion of Carbon Monoxide and Propane.” Tenth Symposium (International) on Combustion The Combustion Institute 1965 111
- Rassweiler G. M. Withrow L. L. SAE Transactions 42 1938 185
- Krieger R. B. Borman G. L. “The Computation of Apparent Heat Release for Internal Combustion Engines.” ASME Paper 66-WA/DGP-4 1966
- Millar G. H. Uyehara O. A. Myers P. S. “Practical Application of Engine Flame Temperature Measurements.” SAE Transactions 62 1954 515
- Johnson J. H. “End Gas Temperatures, Pressures, and Reaction Rates.” Mechanical Engineering University of Wisconsin
- Krull F. N. Foote J. E. “A Line Scanning System Controlled From an On-Line Console.” AFIPS Conference Proceedings 26 1964 397
- D'Alleva B. A. “Procedure and Charts for Estimating Exhaust Gas Quantities and Composition.” General Motors Research Lab. Publication 1960
- Steffensen R. J. Agnew J. T. Olsen R. A. “Tables for Adiabatic Gas Temperature and Equilibrium Composition of Six Hydrocarbons.” Engineering Bulletin of Purdue University 122 1966
- “JANAF Interim Thermodynamical Data Tables.” Dow Chemical Corp. Midland, Mich. 1960
- Lewis B. von Elbe G. “Combustion, Flames and Explosions of Gases.” New York Academic Press, Inc. 1951 740