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A Study on Characteristics of Methane Emissions from Gasoline Passenger Cars  

Jeon M.S. (Transportation Pollution Research Center Nutionuz Institute of Environmental Research)
Ryu J.H. (Transportation Pollution Research Center Nutionuz Institute of Environmental Research)
Lyu Y.S. (Transportation Pollution Research Center Nutionuz Institute of Environmental Research)
Kim J.C. (Transportation Pollution Research Center Nutionuz Institute of Environmental Research)
Lim C.S. (Transportation Pollution Research Center Nutionuz Institute of Environmental Research)
Kim D.W. (Transportation Pollution Research Center Nutionuz Institute of Environmental Research)
Jeong S.W. (Transportation Pollution Research Center Nutionuz Institute of Environmental Research)
Cho S.Y. (Inha University)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.21, no.6, 2005 , pp. 649-655 More about this Journal
Abstract
Automotive exhaust is suspected to be one of the main reasons of the rapid increase in greenhouse effect gases in ambient air. Although methane emissions are generally orders of magnitude lower than emissions of $CO_{2}$, the global warming potential (GWP) of methane is greater than that of $CO_{2}$. The environmental impact of methane emissions from vehicles is negligible and is likely to remain so for the foreseeable future. In this study, in order to investigate greenhouse gas emission characteristics from gasoline passenger cars, 20 vehicles were tested on the chassis dynamometer and methane emissions were measured. The emission characteristics by model year, mileage, vehicle speed were discussed. Test mode is CVS-15 mode that have been used to regulate for light-duty vehicle in Korea. It was found that $CH_{4}$ emissions showed higher for cold start, old model year and long mileage than hot start, new model year and short mileage, respectively. These results were compared with IPCC emission factors and the overall our results were anticipated to contribute for domestic greenhouse gas emissions calculation.
Keywords
Methane emissions; Gasoline passenger cars; Hot start; Cold start; Vehicle speed;
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