摘要
In order to study the effect of fuel injection strategies and EGR rate on diesel engine low temperature combustion performance and emissions, experimental study was carried out on an electronically controlled common rail diesel engine. The result shows that raised EGR rate makes specific heat capacity increase, peak pressure and average temperature in cylinder decrease and ignition delay extend, which leads to lower NOx emissions; but smoke emission rises due to reduced intake oxygen density and oxidation process. At medium and small EGR rates, increasing fuel injection pressure can accelerate the mixing of fuel and air and decrease smoke emission. When the combustion phase CA50 is retarded to after 7° crank angle (ATDC), smoke emission increases because of decreased combustion efficiency and enlarged diffusion combustion period.
源语言 | 英语 |
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页(从-至) | 45-49 and 55 |
期刊 | Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering |
卷 | 37 |
期 | 5 |
DOI | |
出版状态 | 已出版 - 15 10月 2016 |