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Effects of Charge Dilution on Nitric Oxide Emission from a Single-Cylinder Engine
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Abstract
The effects of charge dilution on the exhaust emission of nitric oxide (NO) from a single-cylinder engine were evaluated over a range of engine design and operating parameters.
Nitric oxide emission decreased as much as 70% as charge dilution fraction (volume fraction of product gases in the combustion chamber prior to ignition) was increased from 0.065 to 0.164 due to increased valve overlap, external exhaust recirculation, and reduced compression ratio. With these three variables, NO emission was strongly dependent on charge dilution fraction, but was independent of the specific method used to change charge dilution. Other variables such as valve overlap position, spark timing, and exhaust pressure also affected charge dilution and NO emission, but the relationship between charge dilution fraction and NO emission for these variables was not consistent.
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Citation
Benson, J. and Stebar, R., "Effects of Charge Dilution on Nitric Oxide Emission from a Single-Cylinder Engine," SAE Technical Paper 710008, 1971, https://doi.org/10.4271/710008.Also In
References
- Nebel G. J. Jackson M. W. “Some Factors Affecting the Concentration of Oxides of Nitrogen in Exhaust Gases from Spark Ignition Engines,” Journal of Air Pollution Control Association 8 3 Nov. 1958 213 219
- Benson J. D. “Reduction of Nitrogen Oxides in Automobile Exhaust,” Paper 690019 presented at SAE International Automotive Engineering Congress Detroit January 1969
- Agnew W. G. “Future Emission-Controlled Spark-Ignition Engines and Their Fuels,” 34th Mid-Year Meeting of the Division of Refinery American Petroleum Institute Chicago May 12 1969
- Kopa R. D. “Control of Automotive Exhaust Emissions by Modifications of the Carburetion System.” SAE Progress in Technology 12 “Vehicle Emissions-Part II,” New York Society of Automotive Engineers, Inc. 1967
- Deeter W. F. Daigh H. D. Wallin O. W. “An Approach for Controlling Vehicle Emissions,” Paper 680400 presented at SAE Mid-Year Meeting Detroit May 1968
- 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
- “Control of Air Pollution from New Motor Vehicles and New Motor Vehicle Engines,” Federal Register Washington, D. C. 31 61 March 30 1966
- ASTM Manual of Engine Test Methods for Rating Fuels 1952
- Quader A. A. “Why Intake Charge Dilution Decreases Nitric Oxide Emission from Spark Ignition Engines.” Paper 710009 presented at the SAE Automotive Engineering Congress Detroit January 1971
- Wimmer D. B. McReynolds L. A. “Nitrogen Oxides and Engine Combustion.” SAE Transactions 70 1962 paper 380-E
- D'Alleva B. A. “Procedure and Charts for Estimating Exhaust Gas Quantities and Compositions,” GMR-372 General Motors Corp. May 15 1960
- Newhall H. K. “Control of Nitrogen Oxides by Exhaust Recirculation.” SAE Transactions 76 paper 670495
- Muzio L. J. Starkman E. S. Caretto L. S. “The Effect of Temperature Variations in the Engine Combustion Chamber.” Paper 710158 presented at SAE Automotive Engineering Congress Detroit January 1971