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Impact of Traffic Conditions and Road Geometry on Real World Urban Emissions Using a SI Car
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2007 by SAE International in United States
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A precision in-vehicle tail-pipe emission measurement system was installed in a EURO1 emissions compliant SI car and used to investigate the variability in tail-pipe emission generation at an urban traffic junction and uphill/downhill road, and thereby the impact of road topography on emissions. Exhaust gas and skin temperatures were also measured along the exhaust pipe of the instrumented vehicle, so the thermal characteristics and the efficiency of the catalyst could be monitored. Different turning movements (driving events) at the priority T-junction were investigated such as straight, left and right turns with and without stops. The test car was run until hot stable operating conditions were achieved before each test, thereby negating cold start effects.
To demonstrate the influence of the junction and road geometry on tail-pipe emissions and fuel consumption, distance based factors were determined that compared the intersection drive-through measurements and uphill/downhill measurements with steady speed flat road runs. Fuel consumption was increased at intersections by a factor of 2∼4.1. CO, THC and NOx emission were increased by a factor of 1.8∼6.2, 2.5∼5.1 and 2.8∼7.5 respectively. Benzene emissions at intersections were also increased by a factor of 10∼20. The fuel consumption and emissions were lower and higher than flat driving for downhill and uphill driving, respectively. However, the combined uphill/downhill driving fuel consumption and emissions were notably higher than comparable flat road driving. Through fine-scale analysis of real-world driving profiles and tail-pipe emissions, this research makes a contribution to our understanding of the variability in driving parameters and emission production in urban areas. The results of this study will be useful in aiding the development of combined traffic/emission models for urban areas and developing optimal traffic management strategies to minimize emissions.
- Hu Li - Energy and Resources Research Institute, School of Process, Environmental and Materials Engineering
- Gordon E. Andrews - Energy and Resources Research Institute, School of Process, Environmental and Materials Engineering
- Basil Daham - Energy and Resources Research Institute, School of Process, Environmental and Materials Engineering
- Margaret Bell - Institute for Transport Studies, The University of Leeds, UK
- James Tate - Institute for Transport Studies, The University of Leeds, UK
- Karl Ropkins - Institute for Transport Studies, The University of Leeds, UK
CitationLi, H., Andrews, G., Daham, B., Bell, M. et al., "Impact of Traffic Conditions and Road Geometry on Real World Urban Emissions Using a SI Car," SAE Technical Paper 2007-01-0308, 2007, https://doi.org/10.4271/2007-01-0308.
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- Takada Y. Miyazaki T. Lida N. Study on Local Air Pollution Caused by NOx from Diesel Freight Vehicle SAE technical paper 2002-01-0651
- Dembski N. Guezennec Y. Soliman A. Analysis and Experimental Refinement of Real-World Driving Cycle SAE technical paper 2002-01-0069
- The Role the Highways Agency in Local Air Quality Management Department for Environment, Food & Rural Affairs UK
- Peter Hans Cozzarini Christian Emissions and Air Quality SAE Reference book R-237 2000
- Laurikko J. Erlandsson L. Arbrahamsson R. Exhaust in Cold Ambient Conditions: Considerations for a European Test Procedure SAE Paper 95923
- Jason D.H. Checkel M.D. Quantifying Vehicle Emission Factors for Various Ambient Conditions using an On-Road, Real-Time Emissions system SAE Paper 2003-01-0301
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- Andrews G.E. Zhu G. Li H Simpson A. Wylie J.A. Bell M. Tate J. The Effect of Ambient Temperature on Cold Start Urban Traffic Emissions for a Real World SI Car SAE Paper 2004-01-2903
- Andrews G. E. Li Hu Wylie J. A. Zhu G. Bell M. Tate J. Influence of Ambient Temperature on Cold-start Emissions for a Euro 1 SI Car using In-vehicle Emissions Measurement in an Urban Traffic Jam Test Cycle SAE technical paper 2005-01-1617
- Laurikko J. Nylund N. Regulated and Unregulated Emissions from Catalyst Vehicles at Low Ambient Temperature SAE Paper 930946
- Duxbury R.M.C. Morton S.G.C. Measurements of Ozone Precursor Substances, Environmental Law Fifth Oxford University Press 2004
- Li H. Andrews G E. Daham B. Bell M. Tate J. Ropkins K. Study of the Emissions Generated at Intersections for a SI Car under Real World Urban Driving Conditions SAE technical paper 2006-01-1080
- Li H. Ropkins K. Andrews G E. Daham B. Bell M. Tate J. Evaluation of a FTIR Emission Measurement System for Legislated Emissions Using a SI Car SAE technical paper 2006-01-3368