Effect of hydrogen proportion on lean burn performance of a dual fuel SI engine using hydrogen direct-injection
Effect of hydrogen proportion on lean burn performance of a dual fuel SI engine using hydrogen direct-injection
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氢比例对氢直喷双燃料SI发动机稀薄燃烧性能的影响
DOI：
10.1016/j.fuel.2016.09.021
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发表时间：
2016-12
期刊：
影响因子：
7.4
通讯作者：
Sun Yao
中科院分区：
文献类型：
--
作者：
Du Yaodong;Xie Hanguang;Wu Haiming;Sun Yao
氢是一种点火能量低、可燃极限宽、燃烧速度快的燃料，在内燃机中使用富氢汽油混合气是提高燃烧过程性能，特别是稀燃工况性能的有利途径。氢直接喷射允许形成分层混合物，具有防背火功能，与进气含量无关。对氢直喷氢增强型汽油发动机分层稀燃特性进行了试验研究。在发动机转速为1500转/分的情况下，在四种不同的过剩空气比（1,1.2,1.5和1.8）下使用了五种不同的氢气附加分数（3.9%,5.3%,7.2%，8.9%和10.5%）。优化了注氢时间，形成了分层混合物。结果表明，加入氢气后，火焰发展时间和燃烧持续时间缩短，发动机的缸内压力和放热率随着氢气比例的增加而提高，有效热效率也随之提高。由于燃烧速率的提高，MBT被延迟到接近上止点。减少了周期变化，延长了瘦燃极限。此外，随着氢气的加入，HC和CO的排放量减少，而NOx的排放量增加。PM排放仍然处于较低水平。
Hydrogen is a fuel that has low ignition energy, wide inflammability limit and superb combustion rate, using hydrogen-enriched gasoline mixture in SI engine is a favorable way to improve the performance of burning process, particularly in lean-burn condition. Hydrogen direct injection allows forming stratified mixture with back fire prevention and independent with intake air content. An experimental investigation was performed to analyze the stratified lean-burn characteristics of a hydrogen-enhanced gasoline engine with hydrogen direct injection. Five different hydrogen additional fractions (3.9%, 5.3%, 7.2%, 8.9%, and 10.5%) were used under four different excess air ratios (1, 1.2, 1.5, and 1.8) with 1500 rpm of engine speed. Hydrogen injection timing was optimized to form a stratified mixture. The result obtained demonstrated that flame developing duration and combustion duration were reduced after hydrogen added, the engine performed higher in-cylinder pressure and heat release rate with the increase of hydrogen proportion as well as effective thermal efficiency. Due to the improvement on combustion rate, the MBT was retarded close to the TDC. Cyclical variation was reduced and lean-burn limit was extended. In addition, HC and CO emissions were reduced while NOx emission increased with addition of hydrogen. The PM emission remains a low level.
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DOI：
10.4271/2015-01-1684
发表时间：
2015-04
期刊：
--
影响因子：
--
作者：
KV Shivaprasad;P. R. Chitragar;G. N. Kumar
通讯作者：
KV Shivaprasad;P. R. Chitragar;G. N. Kumar
影响因子：
7.2
作者：
Jeroen Vancoillie;J. Demuynck;Louis Sileghem;M. V. D. Ginste;S. Verhelst
通讯作者：
Jeroen Vancoillie;J. Demuynck;Louis Sileghem;M. V. D. Ginste;S. Verhelst
火花正时对氢汽油转子发动机性能的影响
影响因子：
10.4
作者：
Teng Su;Chang Wei JI;Shuofeng Wang;Lei Shi;Jinxin Yang;Xiaoyu Cong
通讯作者：
Xiaoyu Cong
影响因子：
1.9
作者：
J. Heywood;Fernando R. Vilchis
通讯作者：
J. Heywood;Fernando R. Vilchis
影响因子：
7.2
作者：
K. Hamada;M. Rahman;M. A. Abdullah;R. A. Bakar;A. Aziz
通讯作者：
K. Hamada;M. Rahman;M. A. Abdullah;R. A. Bakar;A. Aziz