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Criteria and Air Toxic Emissions from in-Use, Low Emission Vehicles (Levs)

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Abstract:The U.S. Environmental Protection Agency implemented a program to identify tailpipe emissions of criteria and air toxic contaminants from in-use, light-duty Low Emission Vehicles (LEVs). EPA recruited twenty-five LEVs in 2002, and measured emissions on a chassis dynamometer using the cold-start Urban Dynamometer Driving Schedule (UDDS) of the Federal Test Procedure (FTP). The emissions measured included regulated pollutants, particulate matter, speciated hydrocarbon compounds, and carbonyl compounds.

The results provided a comparison of emissions from real world LEVs with emission standards for criteria and air toxic compounds. Emission measurements indicated that a portion of the in-use fleet tested exceeded standards for the criteria gases. Real-time regulated and speciated hydrocarbon measurements demonstrated that the majority of emissions occurred during the initial phases of the cold start portion of the UDDS. Overall, the study provided updated emission factor data for real world, in-use operation of LEVs for improved emissions modeling and mobile source inventory development.

The United States Environmental Protection Agency, through its Office of Research and Development, funded and managed the research described in this manuscript. It has been subject to Agency review, and approved for publication. Mention of trade names or commercial products does not constitute an endorsement or recommendation of use.
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Citation:Baldauf, R. W., W. Crews, R. Snow, J. R. Cook, and P. A. Gabele. Criteria and Air Toxic Emissions from in-Use, Low Emission Vehicles (Levs). JOURNAL OF AIR & WASTE MANAGEMENT ASSOCIATION. Air & Waste Management Association, Pittsburgh, PA, 55(9):1263-1268, (2005).
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Environmental Characterization & Apportionment Branch
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Product Type: Journal
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Published: 09/01/2005
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Bullet Item Criteria and Air Toxic Emissions from in-Use, Low Emission Vehicles (Levs)
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Related Entries:
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Bullet Item Chemical Characterization & Speciation of Mobile Source Emissions: Human Exposure Implications & Implementation Perspectives
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