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On-Road Testing and Calculation of Emission Factor and Fuel Economy  

Lee, Tae-Woo (National Institute of Environmental Research)
Lee, Beom-Ho (Department of Mechanical Engineering, Inha University)
Cho, Seung-Hwan (Department of Mechanical Engineering, Inha University)
Park, Jun-Hong (National Institute of Environmental Research)
Eom, Myoung-Do (National Institute of Environmental Research)
Kim, Jong-Choon (National Institute of Environmental Research)
Lee, Dae-Yup (Department of Mechanical Engineering, Inha University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.17, no.3, 2009 , pp. 90-101 More about this Journal
Abstract
An objective of this study is to suggest a procedure to evaluate vehicle emissions regardless of the driving pattern. Field experiments using portable emission measurement system were conducted under the real world driving cycle. Standardized average for NOx, $CO_2$ emission and fuel consumption rates were calculated while the vehicle specific power distribution within each vehicle speed bin was taken into consideration. Composite emission factor and fuel economy, which were obtained based on the standardized average results and traffic statistics, showed good similarity to those acquired through the conventional chassis dynamometer tests qualitatively as well as quantitatively. Considering that a conventional method obviously has a limitation to reflect various characteristics of the real world, the new approach suggested in this study can be used as an alternative procedure to collect more specific data to establish the mobile emission factors.
Keywords
Portable emission measurement system(PEMS); Emission rate; Composite emission factor; Vehicle speed; Vehicle acceleration; Vehicle specific Power(VSP);
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