Numerical investigation of the effect of two-stage injection strategy on combustion and emission characteristics of a diesel engine

Hanzhengnan Yu, Xingyu Liang, Gequn Shu, Yuesen Wang, Xiuxiu Sun and Hongsheng Zhang

Applied Energy, 2018, vol. 227, issue C, 634-642

Abstract: This work assessed two types of two-stage injection strategies for the operation of a diesel engine: pilot and early injection. The effects of the two-stage injection interval and the first-stage fuel injection proportion on the combustion and emission characteristics when employing these two injection strategies were investigated by numerical modeling, dividing the in-cylinder zone into three different regions. Variations in the NOx, soot, HC and CO emissions in each region were determined at various values of two-stage injection interval and first-stage fuel injection proportion for both strategies. The results demonstrate that, considering both the engine combustion and emission characteristics, a two-stage injection strategy in conjunction with an injection interval of 30–40°CA and a first-stage fuel injection proportion of 30–60% is advisable.

Keywords: Two-stage injection; Two-stage injection interval; First-stage fuel injection proportion; Combustion characteristic; Emission characteristic (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:227:y:2018:i:c:p:634-642

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DOI: 10.1016/j.apenergy.2017.09.014

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