Combustion characteristics of engine fueled by gasoline/hydrogenated biodiesel blend

被引：0

作者：

Leng X. ^{[1
]}

Li M. ^{[2
]}

He Z. ^{[1
]}

Zhang Y. ^{[1
]}

Zhong W. ^{[3
]}

Xuan T. ^{[3
]}

Duan L. ^{[1
]}

Wang P. ^{[1
]}

机构：

[1] Institute for Energy Research, Jiangsu University, Zhenjiang

[2] School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang

[3] School of Energy and Power Engineering, Jiangsu University, Zhenjiang

来源：

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2020年 / 41卷 / 08期

关键词：

Combustion characteristics; Compression ignition; Engine; Gasoline; Hydrogenated catalytic biodiesel; NO[!sub] x [!/sub] emissions; Split injection strategies;

D O I：

10.11990/jheu.201903027

中图分类号：

学科分类号：

摘要：

To investigate the effects of split injection strategies on the combustion characteristics of engines fueled by gasoline/hydrogenated biodiesel, a computational fluid dynamics (CFD) study was performed to calculate the in-cylinder combustion process. The effects of the pre-injection timing, fuel mass ratio, and the main injection timing for the split injection strategies on the combustion characteristics and NO x emissions were numerically assessed. A blended fuel of gasoline and hydrogenated biodiesel with a mass ratio of 70%:30% was used. The results show that compared with single injection, the split injection can significantly reduce the peak pressure rising rate and thereby decrease the combustion noise. With an increase in the pre-injection timing, the heat release rates in the premixed combustion stage reduces, which is beneficial to reducing the combustion noise. However, extremely increasing the pre-injection timing will result in high hydrocarbon emissions. By retarding the main injection timing and decreasing the pre-injection fuel mass ratio, the premixed combustion heat release rate, the maximum pressure rising rate, and the NO x emissions will decrease, while the fuel economy will deteriorate to a certain extent. Considering both engine performance and emissions, the proper values of the pre-injection and main injection timings and the pre-injection mass ratio are -60℃A~-20℃A ATDC, -10℃A~-6℃A ATDC, and 5%~15%, respectively. Copyright ©2020 Journal of Harbin Engineering University.

引用

页码：1196 / 1202

页数：6

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