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Effects of Mixture Distribution on Exhaust Emissions as Indicated by Engine Data and the Hydraulic Analogy
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Abstract
The objectives of this study are twofold. First, engine data are presented which indicate how the three major automotive exhaust pollutants are affected by the distribution of the inducted fuel. Nonuniform fuel distribution prohibits lean engine operation without increasing hydrocarbon emissions. Nitrogen oxide emissions are lower at a given fuel-air ratio with nonuniform fuel distribution, this condition being particularly true near stoichiometric conditions. Carbon monoxide emissions are lower with more uniform fuel distribution.
The primary objective of this paper is to demonstrate a new method of studying the mixing conditions that take place in an induction system. This method involves the use of a conventional water table, a facility to demonstrate pictorially the salient flow field characteristics and mixing patterns that were encountered at typical engine operating conditions. Also, several different geometric configurations and their resultant flow patterns are included. Some of these configurations were duplicated in an experimental induction system and were shown to have similar flow field patterns.
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Citation
Liimatta, D., Hurt, R., Deller, R., and Hull, W., "Effects of Mixture Distribution on Exhaust Emissions as Indicated by Engine Data and the Hydraulic Analogy," SAE Technical Paper 710618, 1971, https://doi.org/10.4271/710618.Also In
References
- Harrington David L. “Analysis and Digital Simulation of Carburetor Metering.” Doctoral Thesis Horace H. Rackham School of Graduate Studies, the University of Michigan September 1968
- Rayleigh Lord “On the Instability of Jets.” Proc. of London Math. Soc. 10 1878
- Scheuble F. N. “On Atomization in Carburetors.” National Adivsory Committee for Aeronautics, Tech. Memo. No. 644 1931
- Castleman, R. A. Jr. “The Mechanism of the Atomization of Liquids.” Bureau of Standards J. of Research 6 3 1931 369
- “Injection and Combustion of Liquid Fuels.” WADC Tech. Rept. 56-344 Battelle Memorial Institute March 1957
- Marshall, W. R. Jr. “Atomization and Spray Drying.” Chem. Engrg. Progress Monograph Series No. 2 50 1954
- Eltinge Lamont “Fuel-Air Ratio and Distribution from Exhaust Gas Composition.” SAE Transactions 77 1968 paper 680114
- Bartholomew E. Chalk H. Brewster B. “Carburetion, Manifolding and Fuel Antiknock Value.” SAE Annual Meeting Detroit January 1938
- Cooper D. E. “A Carbon-14 Tracing Technique for Studying the Distribution of Fuel Components in Automotive Engines.” Symposium on Applications of Radioactivity in Petroleum Research and Refining Operations Tracerlabs, Inc. Boston October 1956
- Cooper D. E. Courtney R. L. Hall C. A. “Radioactive Tracers Cast New Light on Fuel Distribution.” SAE Transactions 67 1959
- Bridgeman O. C. “Equilibrium Volatility of Motor Fuels from the Standpoint of Their Use in Internal Combustion Engines.” National Bureau of Standards Research Paper 694 July 1934
- Orlin James W. Lindner, Norman Jr. Bitterly Jack G. “Application of the Analogy Between Water Flow with a Free Surface and Two Dimensional Compressible Gas Flow.” National Advisory Committee for Aeronautics, Tech. Note No. 1185
- Engel F. V. A. Stainsby W. “Gas Dynamics & Open Channel Flow Analogy.” The Engineer 220 5736 Dec. 31 1965 1073