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Effect of alcohol-gasoline blends optimization on fuel properties, performance and emissions of a SI engine

机译:酒精汽油混合气优化对SI发动机燃油特性,性能和排放的影响

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摘要

This study, as an observation, put its utmost effort to emphasize on the development of various physicochemical properties using multiple alcohols (C-2 to C-6) at different ratios compared to that of the conventional ethanol gasoline blend. To optimize the properties of multiple alcohol-gasoline blends, properties of each fuel were measured first. An optimization tool of Microsoft Excel "Solver" was used for obtaining the optimum blend. Using optimizing tool, three optimum blend ratios were selected which possessed maximum heating value (MaxH), maximum research octane number (MaxR) and maximum petroleum displacement (MaxD). These blends were used for testing in a four cylinder gasoline engine at the wide open throttle condition with varying speeds and compared obtained outcomes with that of E15 (15 ethanol and 85 gasoline) as well as gasoline. Optimized blends have shown higher brake torque and brake thermal efficiency (BTE) but lower brake specific fuel consumption (BSFC) than E15. MaxR, MaxD and MaxH blends produced mean 4.4, 1.8 and 0.4 increased BTE and mean 4.39, 1.8 and 2.27 lower BSFC than that of E15. On the other hand, MaxR, MaxD, MaxH and E15 reduced 4.46, 8.37, 12.4 and 17.2, mean CO emission and 4.5, 11.81, 8.19 and 16 mean HC emission respectively than that of gasoline. NOx emission of optimized blends was higher than gasoline. However, MaxR, MaxD, MaxH reduced 4, 14.57 and 20.76 NOx than that of E15. (C) 2014 Elsevier Ltd. All rights reserved.
机译:作为一项观察,这项研究竭尽全力强调使用多种醇(C-2至C-6)以与常规乙醇汽油共混物相比不同的比例开发各种理化性质。为了优化多种醇汽油混合物的性能,首先测量每种燃料的性能。使用Microsoft Excel“ Solver”的优化工具来获得最佳混合。使用优化工具,选择了三个最佳混合比,它们具有最大热值(MaxH),最大研究辛烷值(MaxR)和最大石油置换量(MaxD)。这些混合物用于在全开节气门条件下以可变速度在四缸汽油发动机中进行测试,并将所得结果与E15(15种乙醇和85种汽油)以及汽油的结果进行比较。与E15相比,经过优化的混合油具有更高的制动扭矩和制动热效率(BTE),但制动油耗比(BSFC)更低。与E15相比,MaxR,MaxD和MaxH混合物产生的BTE平均增加4.4、1.8和0.4,平均BSFC降低4.39、1.8和2.27。另一方面,与汽油相比,MaxR,MaxD,MaxH和E15的平均CO排放量分别降低了4.46、8.37、12.4和17.2,平均HC排放量降低了4.5、11.81、8.19和16。优化混合物的NOx排放量高于汽油。但是,MaxR,MaxD,MaxH比E15减少了4、14.57和20.76 NOx。 (C)2014 Elsevier Ltd.保留所有权利。

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