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An Experimental Study on Fuel Consumption and Emission Characteristics of LPG-HEV City Transit Buses
Technical Paper
2015-01-2797
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper studies the characteristics of fuel consumption and exhaust emission of city transit buses, and analyzes the fuel saving rate and exhaust pollutants reduction effect of LPG-HEV buses relative to LPG buses. The running speed, fuel consumption, exhaust emission and other variables of 3 LPG-HEV buses that aren't plug-in hybrid, and 2 LPG buses were measured by a portable emission measurement system (PEMS) under real driving situations of city transit buses in Guangzhou, China. The test data was analyzed to make a comparison between LPG-HEV and LPG buses. The study results show that the running speed of city buses in real driving modes is mainly distributed in the range of 0 to 35 km/h, and the average value is 18km/h, while the acceleration is distributed in a range from −0.5 to 0.5m/s2 mainly. The average fuel consumption of LPG-HEV buses is 51.02 l/100km, and is 6.23% lower than that of LPG buses. The fuel saving effects appears when its speed below 25 km/h, and the lower the speed is, the more significant the fuel saving effect will be. The average emission factors of exhaust gases NOx, CO and HC of LPG-HEV buses are 21.7g/km, 2.36g/km and 1.61g/km, and has a change ratio of −18.9%, 108.8% and 10.3%respectively by contrast with that of LPG buses. The increase of CO and HC emission factors of LPG-HEV buses is due to the decrease of excess air coefficient in LPG-HEV engine.
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Peng, M., Zheng, Y., Jiang, X., and Wang, J., "An Experimental Study on Fuel Consumption and Emission Characteristics of LPG-HEV City Transit Buses," SAE Technical Paper 2015-01-2797, 2015, https://doi.org/10.4271/2015-01-2797.Also In
References
- Chinese Automotive Technology & Research Centre., Nissan (China) investment Co., Dongfeng Motor Co. Annual report on new energy vehicle industry in China (2014) Beijing Social Sciences Academic Press 2014 193
- Merkisz , J. , Pielecha , J. , Fuc , P. , Lijewski , P. The analysis of the PEMS measurements of the exhaust emissions from city buses using different research procedures 2012 IEEE Vehicle Power and Propulsion Conference, VPPC 2012 903 907 2012 10.1109/VPPC.2012.6422698
- Huo , H. , Yao , Z. , Zhang , Y. , Shen , X. et al. On-board measurements of emissions from diesel trucks in five cities in China Applied Energy 54 159 167 2012 10.1016/j.atmosenv.2012.01.068
- Huo , H. , Yao , Z. , Zhang , Y. , Shen , X. et al. On-board measurements of emissions from light-duty gasoline vehicles in three mega-cities of China Applied Energy 49 371 377 2012 10.1016/j.atmosenv.2011.11.005
- Yao , Z. , Cao , X. , Shen , X. , Zhang , Y. et al. On-road emission characteristics of CNG-fueled bi-fuel taxis Atmospheric Environment 94 198 204 2014 10.1016/j.atmosenv.2014.05.027
- Peng , M. , Cai , M. , Wu , X. , Fang , R. et al. An experimental study on the operating conditions and emission characteristics of large-sized LPG bus Automotive Engineering 33 11 942 946 950 2011
- Peng , M. , Wu , X. , Jiang , X. A study on the emission characteristics of LPG transit buses based on VSP Automotive Engineering 36 3 269 272 263 2014
- Hallmark , S. , Wang , B. , Sperry , R. Comparison of on-road emissions for hybrid and regular transit buses Journal of the Air and Waste Management Association 63 10 1212 1220 2013 10.1080/10962247.2013.813874