为了研究生物柴油-乙醇-水微乳化燃料在柴油机上的应用,在一台单缸直喷式柴油机上进行了燃烧特性和排放特性的对比试验,分别使用燃烧分析仪和排放分析仪,测录燃料的燃烧压力和排放浓度.研究结果表明:与生物柴油相比,随着乙醇和水的加入,微乳化燃料的压力曲线、压力升高率曲线以及放热率曲线明显后移;小负荷时,生物柴油-乙醇-水微乳化燃料峰值燃烧压力高,而峰值压力升高率和峰值瞬时燃烧放热率略低;大负荷时,微乳化燃料峰值燃烧压力、峰值压力升高率和峰值瞬时燃烧放热率均明显增加;微乳化燃料燃烧开始时放热明显滞后,燃烧结束时放热明显提前,微乳化燃料NOx和烟度排放降低.%To study the application of biodiesel-ethanol-water micro-emulsion fuel on diesel engines, the combustion and emission performances are compared on a single-cylinder diesel engine, the combustion analyzer and emission analyzer are used to test the pressure and emission concentration of fuels respectively. The results indicate that: compared with biodiesel, with the adding of ethanol and water, the combustion curves of micro-emulsion fuel will delay apparently; at small loads, the peak pressure of micro-emulsion fuel is high, while peak pressure ratio and peak heat release ratio will decrease; at high loads, the peak pressure, peak pressure ratio and peak heat release ratio of micro-emulsion fuel will increase; the start of combustion will delay, but at the end of combustion, the heat release ratio will increase obviously; NOx and smoke of the micro-emulsion fuel will decrease. 1 tab, 7 figs, 16 refs.
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