Experimental investigation of the effects of injection strategies on cycle-to-cycle variations of a DISI engine fueled with ethanol and gasoline blend
Experimental investigation of the effects of injection strategies on cycle-to-cycle variations of a DISI engine fueled with ethanol and gasoline blend
复制标题
喷射策略对乙醇和汽油混合物燃料的 DISI 发动机循环变化影响的实验研究
DOI：
10.1016/j.energy.2018.09.170
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发表时间：
2018-12-15
期刊：
影响因子：
9
通讯作者：
Guan, Jinhuan
中科院分区：
文献类型：
--
作者：
Duan, Xiongbo;Liu, Jingping;Guan, Jinhuan
在这项研究中，工作的主要目的是通过分别使用单次喷射（SI）和双停滞喷射策略（TSIS）模式来评估以乙醇和汽油混合燃料为燃料的涡轮增压DISI发动机的循环变化喷射策略。采用双停滞喷油策略模式，通过改变喷油时间或二次燃油质量重分配来控制第一次喷油和后二次喷油。统计分析了缸内压力、峰值压力及其位置、最大升压率及其位置、指示平均有效压力和燃烧相位的循环变化，并对不同的喷射策略进行了综合比较。结果表明：与其他喷射方式相比，采用TSIS 3能有效缓解缸内压力波动，集中整体放热；同时，采用TSIS 3获得的COVPP最低（5.63%），峰值压力直方图的频率分布范围相对较窄。此外，10-90%燃烧持续时间的循环间变化相对较小，对喷射策略模式的变化不太敏感。最后，采用TSIS 3是获得最低COVIMEP和最高IMEP的最佳注射策略。(C) 2018 Elsevier Ltd.版权所有。
In this study, the main objective of the work was to evaluate the injection strategies on the cycle-to-cycle variations of a turbocharged DISI engine fueled with ethanol and gasoline blend by using single injection (SI) and two-stagnation injection strategy (TSIS) modes, respectively. Two-stagnation injection strategy modes were adopted to control the first injection and the later second injection by changing the injection timing or the second fuel mass repartition. The cycle-to-cycle variations of the in-cylinder pressure, peak pressure and its location, maximum rate of pressure rise and its location, indicated mean effective pressure and combustion phasing were statistically analyzed and comprehensively compared with various injection strategies. Results showed that employing TSIS 3 mitigated the in-cylinder pressure fluctuation and concentrated the integral heat release compared with other injection strategies. Meanwhile, adopting TSIS 3 obtained the lowest COVPP (5.63%) and achieved the frequency distributions of peak pressure histograms in a relatively narrow range. Furthermore, the cycle-to-cycle variations of the 10-90% combustion duration were relatively small and less sensitive to change the injection strategy modes. Finally, employing TSIS 3 was proved to be the optimal injection strategy for achieving the lowest COVIMEP while obtaining the highest IMEP. (C) 2018 Elsevier Ltd. All rights reserved.