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Ambient Temperature and Driving Cycle Effects on CNG Motor Vehicle Emission
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1990 by SAE International in United States
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This paper describes an emissions study of two vans powered by compressed natural gas (CNG). One van was relatively new, while the other had been driven more than 120,000 mi. The purpose of the study was to obtain emissions information which could be used to predict the impact of CNG use on ambient air quality and air toxic concentrations, and to develop a better understanding of the effect of ambient temperature variations on CNG emissions. Using four different driving cycles, emission tests were carried out at 20°F, 75°F, and 105°F. Test results agree with previous findings that document low emissions of nonmethane hydrocarbons from CNG vehicles. Results also confirm the expectation that CNG emissions are not significantly affected by ambient temperature variations, although an increase in formaldehyde emission was noted for the 20°F cold-start tests.
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- Peter Gabele - Mobile Source Emissions Research Branch, AREAL/Environmental Protection Agency Research Triangle Park, N.C.
- Kenneth T. Knapp - Mobile Source Emissions Research Branch, AREAL/Environmental Protection Agency Research Triangle Park, N.C.
- William D. Ray - Mobile Source Emissions Research Branch, AREAL/Environmental Protection Agency Research Triangle Park, N.C.
- Richard Snow - NSI Inc. Research Triangle Park, N.C.
- William Crews - NSI Inc. Research Triangle Park, N.C.
- Ned Perry - NSI Inc. Research Triangle Park, N.C.
- Jeffrey Lanning - NSI Inc. Research Triangle Park, N.C.
CitationGabele, P., Knapp, K., Ray, W., Snow, R. et al., "Ambient Temperature and Driving Cycle Effects on CNG Motor Vehicle Emission," SAE Technical Paper 902069, 1990, https://doi.org/10.4271/902069.
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