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Effect of Temperature on Exhaust Emissions
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Sector:
Event:
Fleet Week
Language:
English
Abstract
A program has been completed to study the effects of ambient temperature on exhaust emissions. It consisted of determining the cold start emission levels of two late model passenger cars at temperatures of +70, +40, and -10°F with two test fuels of different midrange volatility characteristics.
The ambient temperature was found to have a pronounced effect on exhaust emissions. A reduction of the test temperature from +70 to -10°F resulted in a manyfold increase in hydrocarbon and carbon monoxide emissions. Most of this increase in emissions, as well as an associated deterioration in fuel economy, occurred during the initial 5 min period after a cold start. The ambient temperature was found to have no major effect on the levels of pollutants emitted during the fully warmed-up operation of cars.
Relative to the effects of ambient temperature and the vehicle characteristics, the midrange volatility of the fuel was concluded to have only a minor effect on exhaust emissions.
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Authors
Citation
Grinberg, L. and Morgan, L., "Effect of Temperature on Exhaust Emissions," SAE Technical Paper 740527, 1974, https://doi.org/10.4271/740527.Also In
References
- Federal Register 37 221 Environmental Protection Agency Washington, D.C.
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- Eccleston B. H. Hurn R. W. “Effect of Fuel Front-End and Midrange Volatility on Automobile Emissions.” Report of Investigation 7707 Bureau of Mines Bartlesville, Oklahoma 1972
- Fleming R. D. Allsup J. R. “Natural Gas as an Automotive Fuel, An Experimental Study.” U.S. Dept. of the Interior, Bureau of Mines Report of Investigation 7806 1973
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- Lindsay R. Thomas A. Woodworth J. A. Zeschman E. G. “Influence of Homogeneous Charge on the Exhaust Emissions of Hydrocarbons, Carbon Monoxide, and Nitric Oxide from a Multicylinder Engine.” Paper 710588 presented at SAE Mid-Year Meeting Montreal June 1971
- “VAPIPE - A Simple Method of Car Exhaust Emission Control.” National Engineering Laboratory Glasgow, U.K. June 1973
- Air Management Branch Air Quality Monitoring Report 4 Canada Ministry of the Environment Ontario 1971