Journal of Applied Science and Engineering

Published by Tamkang University Press


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Hao Yang1, Xing-Hu Li This email address is being protected from spambots. You need JavaScript enabled to view it.1, Ming-Fei Mu1 and Gui-Yue Kou1

1School of Transportation Science and Engineering, Beihang University, Beijing 100191, P.R. China


Received: July 18, 2016
Accepted: December 4, 2016
Publication Date: June 1, 2017

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A comparative study of the physical and chemical properties of soybean biodiesel with China stage IV diesel fuel was presented. The effects of biodiesel on engine performance were analyzed. The excess air ratio and the heating value ratio of an engine’s cylinder mixture were proposed based on the differences of properties of two fuels. The bench tests of engine performance were carried out with an enginefuelledwithtwofuelsseparately.Theestimatedexcessairratioandtheheatingvalueratioofan engine’s cylinder mixture through the method were approximate to the experiment results. This comparison demonstrates that the estimate method can be applied to the performance analysis of an engine. Compared with China stage IV diesel, when a diesel engine was fuelled with soybean biodiesel, the torque and power declined from 0.4% to 11.6%; the brake-specific fuel consumption increased from 4% to 17.8%; CO, HC and PM emissions decreased significantly and NOx emissions increased slightly.

Keywords: Soybean Biodiesel, China Stage IV Diesel, Fuel Properties, Performance, Emissions


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