Effects of direct injection timing and premixed ratio on combustion and emissions characteristics of RCCI (Reactivity Controlled Compression Ignition) with N-heptane/gasoline-like fuels
Effects of direct injection timing and premixed ratio on combustion and emissions characteristics of RCCI (Reactivity Controlled Compression Ignition) with N-heptane/gasoline-like fuels
复制标题
直喷正时和预混比对正庚烷/类汽油燃料RCCI（反应性控制压缩点火）燃烧和排放特性的影响
DOI：
10.1016/j.energy.2015.09.069
复制
发表时间：
2015-12
期刊：
影响因子：
9
通讯作者：
Lifeng Zhu, Yong Qian, Xiaole Wang, Xingcai Lu*
中科院分区：
文献类型：
--
作者：
Lifeng Zhu, Yong Qian, Xiaole Wang, Xingcai Lu*
本文在单缸发动机上对正庚烷/类汽油燃料的反应性控制压缩点火（RCCI）燃烧和排放特性进行了实验研究。研究了喷射时机和预混比对喷射效果的影响。实验结果表明，随着直喷时间的提高，三种燃料的点火延迟时间都有所增加，其中乙醇的点火延迟时间最长。三种燃料的CO（一氧化碳）和烟尘排放量逐渐减少，而NOx排放量逐渐增加。HC（碳氢化合物）排放在汽油中单调下降，在酒精燃料中先上升后下降。在相同预混比和直喷时间的汽油和乙醇对比中，以乙醇为端燃料的燃烧阶段比汽油晚，特别是当预混比较高时。此外，乙醇的NOx和烟尘排放量低于汽油，这表明乙醇作为替代燃料可以改善RCCI燃烧模式下的排放。
This paper presents an experimental study on the combustion and emissions characteristics of Reactivity Controlled Compression Ignition (RCCI) combustion with n-heptane/gasoline-like fuels are researched on a single-cylinder engine. The effects of injection timing and premixed ratio are investigated. The experimental results indicate that with the advance of the direct injection timing, the ignition delay increases for all three fuels and ethanol has the longest ignition delay. The CO (carbon monoxide) and soot emissions gradually decrease while the NOx emissions increase for the three different fuels. However, HC (hydrocarbon) emissions monotonically decrease with gasoline but initially increase and then decrease with the alcohol fuels. When comparing gasoline and ethanol with the same premixed ratio and direct injection timing, the combustion phase with ethanol as port fuel occurs later than that of gasoline, especially with a higher premixed ratio. Moreover, ethanol has lower NOx and soot emissions than those of gasoline, indicating that ethanol as an alternative fuel can improve emissions in the RCCI combustion mode.
登录
查看更多内容
影响因子：
1.2
作者：
Kokjohn, Sage L.;Hanson, Reed M.;Reitz, Rolf D.
通讯作者：
Reitz, Rolf D.
影响因子：
7.4
作者：
Rakopoulos, Dimitrios C.;Rakopoulos, Constantine D.;Giakoumis, Evangelos G.
通讯作者：
Giakoumis, Evangelos G.
影响因子：
4.6
作者：
F. N. Alasfour
通讯作者：
F. N. Alasfour
影响因子：
10.4
作者：
Rakopoulos, D. C.;Rakopoulos, C. D.;Kyritsis, D. C.
通讯作者：
Kyritsis, D. C.
影响因子：
9
作者：
D. Rakopoulos;C. D. Rakopoulos;E. G. Giakoumis;R. G. Papagiannakis;D. Kyritsis
通讯作者：
D. Rakopoulos;C. D. Rakopoulos;E. G. Giakoumis;R. G. Papagiannakis;D. Kyritsis