Ultra-lean limit extension for gasoline direct injection engine application via high energy ignition and flash boiling atomization
Ultra-lean limit extension for gasoline direct injection engine application via high energy ignition and flash boiling atomization
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通过高能点火和闪蒸雾化延长汽油直喷发动机应用的超稀薄极限
DOI：
10.1016/j.proci.2020.07.104
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发表时间：
2020-10
影响因子：
3.4
通讯作者：
Min Xu
中科院分区：
文献类型：
--
作者：
Chang Ye;Zhe Sun;Mingli Cui;Xuesong Li;David Hung;Min Xu
为了进一步提高汽油直喷发动机的热效率和减少有害气体的排放，人们在实现更低燃烧方面做出了广泛的努力。在这些技术中，提高点火能量已被证明是实现稀薄燃烧的有效方法。很少有人针对燃料的雾化过程，以产生更均匀的燃料-空气混合物，这被认为能够延长发动机的低可燃性极限。本研究探讨了利用闪蒸雾化技术，一种通过提高燃油温度来改善喷雾雾化的技术，与高能点火技术相结合，以提高稀燃条件下GDI发动机的性能。为此，单缸光学GDI发动机与高速成像技术以及其他测量仪器一起使用。燃料通过加热元件预热，并通过定制的点火系统产生高能点火。在过冷和闪沸条件下，使用不同的过量空气比，研究了不同初始电流（晶体管线圈点火（TCI）， 250 mA和500 mA）的点火情况。研究发现，在500 mA的初始点火电流下，采用闪蒸雾化可将精益极限从1.95提高到2.10。其他关键参数，如指示平均有效压力（IMEP），排放如CO， NOx， THC也进行了分析，以证明高能点火和闪蒸雾化的影响。
Extensive efforts have been made in achieving leaner combustion for gasoline direct injection (GDI) engines to further improve the thermal efficiency and reduce harmful emissions. Among these techniques, increasing ignition energy has been proven to be an effective method to achieve lean combustion. Few targets the atomization process of the fuel in generating a more homogenous fuel-air mixture, which is believed to be able to extend the lean flammability limit of the engine. This investigation explores the use of flash boiling atomization, a technique to improve spray atomization via elevating the fuel temperature, in combination with high energy ignition technique for better GDI engine performance under lean-burn conditions. For such purposes, a single-cylinder, optical GDI engine was used with high-speed imaging techniques, along with other measurement instruments. The fuel was preheated by a heating element and high energy ignitions were generated by a customized ignition system. ignitions with various initial currents (transistor coil ignition (TCI), 250 mA, and 500 mA) under both sub-cooled and flash boiling conditions were examined using different excess air ratios. It was found that using flash boiling atomization has extended the lean limit from 1.95 to 2.10 under the 500 mA initial current ignition. Other critical parameters such as indicative mean effective pressure (IMEP), emissions such as CO, NOx, THC were also analyzed to demonstrate the impacts of high energy ignition and flash boiling atomization.
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影响因子：
7.4
作者：
Shangze Yang;Xuesong Li;D. Hung;M. Arai;Min Xu
通讯作者：
Shangze Yang;Xuesong Li;D. Hung;M. Arai;Min Xu
影响因子：
4.4
作者：
Hao Zhao;Ningbo Zhao;Tianhan Zhang;Shuqun Wu;Guoming Ma;Chao Yan;Y. Ju
通讯作者：
Hao Zhao;Ningbo Zhao;Tianhan Zhang;Shuqun Wu;Guoming Ma;Chao Yan;Y. Ju
影响因子：
6.4
作者：
Carlos Eduardo Castilla Alvarez;Giselle Elias Couto;V. Roso;Arthur Braga Thiriet;R. M. Valle
通讯作者：
Carlos Eduardo Castilla Alvarez;Giselle Elias Couto;V. Roso;Arthur Braga Thiriet;R. M. Valle
DOI：
10.4271/2017-01-0679
发表时间：
2017-03
期刊：
--
影响因子：
--
作者：
K. Xie;Shui Yu;Xiao Yu;G. Bryden;M. Zheng;Mengzhu Liu
通讯作者：
K. Xie;Shui Yu;Xiao Yu;G. Bryden;M. Zheng;Mengzhu Liu
氢比例对氢直喷双燃料SI发动机稀薄燃烧性能的影响
影响因子：
7.4
作者：
Du Yaodong;Xie Hanguang;Wu Haiming;Sun Yao
通讯作者：
Sun Yao