Simplified emission test for the inspection of emission control system installed on vehicles |
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| Institution: | 1. Tianjin Key Laboratory of Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China;2. China Automotive Technology & Research Center Co., Ltd, Tianjin, 300300, China;1. Department of Mechanical and Manufacturing Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta, T2N 1N4, Canada;2. Department of Integrated System + Design, College of Engineering, University of Michigan, Ann Arbor, MI, 48109, USA;3. Department of Mechanical Engineering, Military Institute of Science and Technology, Mirpur Cantonment, Dhaka, 1216, Bangladesh;4. School of Geographical Sciences, Hebei Normal University, Shijiazhuang, 050024, China;5. Hebei Technology Innovation Center for Remote Sensing Identification of Environmental Change, Shijiazhuang, 050024, China |
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| Abstract: | The objective of this study is to develop a simplified emission test for the inspection of in-use vehicles. For this purpose, a simplified chassis dynamometer (S-CHDY) was developed first. S-CHDY consists of a speed meter tester and a direct current motor system which can load electrical inertia force to the test vehicle. To examine the effectiveness of the emission test, the emission control systems of four vehicles were tampered with, and they were driven on S-CHDY with M4 mode pattern. CO, HC and NOx concentrations in tail pipe gas were continuously measured and those mean values were evaluated. As a result, it was shown that the mean values rise according to the abnormality in the emission control system. Moreover, to directly measure the mass emissions from the test vehicles, a new type CVS method was developed. |
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