Comparative Performance and Emissions Study of a Direct Injection Diesel Engine Using Diesel Fuel and Soybean Biodiesel

Hao Yang ； Xing-Hu Li ； Ming-Fei Mu ； Gui-Yue Kou

《淡江理工學刊》 20卷2期 (2017/06) Pp. 201-210

https://doi.org/10.6180/jase.2017.20.2.08

摘要

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 engine fuelled with two fuels separately. The estimated excess air ratio and the heating value ratio of an 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.

關鍵字

Soybean Biodiesel ； China Stage IV Diesel ； Fuel Properties ； Performance ； Emissions