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| Study on the emission performance,fuel economy and reliability of a bus fuelled with biodiesel blends |
| ZHANG Yun-hua, LOU Di-ming, TAN Pi-qiang, HU Zhi-yuan |
| School of automobile studies, Tongji University, Shanghai 201804, China |
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Abstract A long-term experimental study on the characteristics of on-road emissions,fuel economy and reliability for a bus at emission standard Stage V was carried out through the emission test for 110,000kilometers.The bus was fueled with biodiesel blends B5(5% biodiesel made with used cooking oil and 95% pure China-V diesel in volume).The experimental results show that the average CO emission factor of B5 is about 13.28% lower than that of D100,the average THC emission factor of B5 is about 7.86% lower than that of D100,and the average CO2 and NOx emission factors of B5 are higher than those of D100 by 11.50% and 11.84% respectively.Compared with D100,the average PN emission factor of B5 increases by 13.15% while the average PM emission factor decreases by 14.74%.The recorded data of fuel consumption shows that the fuel economy of B5 is equivalent to that of D100,but the annual average fuel consumption of B5 per hundred kilometers is 1.54% higher than that of D100 based on heating value.The diesel engine endoscope test shows that there is no obvious carbon deposition on the key components of the engine,such as the piston head,the combustion chamber,the fuel injector,and the site between valve and valve seat,which indicates the reliability of the engine.
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Received: 24 November 2016
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