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Effect of Inlet Air Humidity and Temperature on Diesel Exhaust Emissions
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English
Abstract
The Automobile Manufacturers Association (AMA) and the Engine Manufacturers Association (EMA) contracted with Ethyl Corp. to determine the effects of humidity and temperature on HC, CO, CO2, NOx, and smoke emissions on six different manufacturers' engines run over a 13-mode cycle. Emission procedures used are similar to “California Procedures for Diesel Engines in 1973 and Subsequent Model Year Vehicles Over 6001 Pounds Gross Vehicle Weight” as adopted November 18, 1970 and amended February 17, 1971. Equations are recommended to correct NOx emissions back to standard conditions of 75 grains of H2O/lb dry air and 85 F. Humidity had no significant effect on other emissions. Temperature substantially affected the HC, CO, and smoke emissions of some engines. The correlations between four NO/NOx instruments and between two smoke measurement techniques are reported. Future work is needed to explain the different levels of NO/NOx shown by the different instruments when measuring diesel exhaust at low concentrations.
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Authors
Citation
Krause, S., Merrion, D., and Green, G., "Effect of Inlet Air Humidity and Temperature on Diesel Exhaust Emissions," SAE Technical Paper 730213, 1973, https://doi.org/10.4271/730213.Also In
References
- Robison J. A. “Humidity Effects on Engine Nitric Oxide Emissions at Steady-State Conditions.” SAE Transactions 79 1970 paper 700467
- Krause S. R. “Effect of Engine Intake-Air Humidity, Temperature, and Pressure on Exhaust Emissions.” SAE Transactions 80 1971 paper 710835
- Brown W. J. Gendernalik S. A. Kerley R. V. Marsee F. J. “Effect of Engine Intake-Air Moisture on Exhaust Emissions.” SAE Transactions 79 1970 paper 700107
- “Effect of Laboratory Ambient Conditions on Exhaust Emissions.” Scott Research Laboratories, Inc. Report to National Air Pollution Control Administration April 1970
- “California Exhaust Emission Standards, Test and Approval Procedures for Diesel Engines in 1973 and Subsequent Model Year Vehicles Over 6,001 Pounds Gross Vehicle Weight.” Nov. 18 1970 Feb. 17 1971
- Federal Register 36 193 Nov. 5 1971
- “Measuring Diesel Exhaust Smoke.” Ethyl Corp. Technical Note May 1968
- “1967 CRC Diesel Smokemeter Calibration Tests.” CRC Report 421 June 1969