Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Influence of ambient temperature of tailpipe emissions from 1984-1987 model year light-duty gasoline motor vehicles {microform}
Author Stump, Fred ; Tejada, S. ; Ray, W. ; Dropkin, D. ; Black, F.
Other Authors
Author Title of a Work
Tejada, Silvestre.
Ray, William.
Dropkin, David.
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. ;Northrop Services, Inc., Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Atmospheric Sciences Research Laboratory,
Year Published 1989
Report Number EPA/600/J-89/019
Stock Number PB89-237473
Additional Subjects Exhaust emissions ; Exhaust pipes ; Motor vehicles ; Temperature ; Exhaust gases ; Exhaust systems ; Gasoline engines ; Carbon monoxide ; Nitrogen oxides ; Motor vehicle engines ; Automative fuels ; Experimental data ; Air pollution
Library Call Number Additional Info Location Last
NTIS  PB89-237473 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 16 p. : ill. ; 28 cm.
Motor vehicle emissions are sensitive to a number of variables including ambient temperature, driving schedule (speed versus time), and fuel composition. Hydrocarbon, aldehyde, carbon monoxide, and oxides of nitrogen emissions were examined with nine recent technology 4-cylinder gasoline motor vehicles at 70F, 40F, and 20F. About 200 hydrocarbon and 12 aldehyde compounds were included in the organic emissions characterization. Two fuels and two driving schedules were used. Typically, hydrocarbon and carbon monoxide emissions were significantly increased by reduced ambient temperature. Oxides of nitrogen emissions also increased, but to a lesser extent. There were no predictable formaldehyde emissions trends with temperature. Paraffinic and aromatic hydrocarbon emission fractions were sensitive to fuel composition, but the olefinic emission fraction (dominated by ethylene and propylene) was not. With low temperature cold start tests, preceding transient driving with a 5 minute engine idle resulted in reduced carbon monoxide emission rates and elevated oxides of nitrogen emission rates. Hydrocarbon emission rates were not predictable sensitive to the preliminary idle.
"Reprint article in : Atmospheric Environment, 23(2):pp. 307-320, 1989." Includes bibliographies.