稀燃模式下直喷氢气发动机性能试验

doi:10.13733/j.jcam.issn.2095‑5553.2024.11.020

中国农机化学报 ›› 2024, Vol. 45 ›› Issue (11): 125-130.DOI: 10.13733/j.jcam.issn.2095‑5553.2024.11.020

稀燃模式下直喷氢气发动机性能试验

王雷1，李海玉2，栾阔3，赵妞3，陈广源4

1. 潍坊职业学院汽车工程学院，山东潍坊，262737； 2. 潍坊职业学院机电工程学院，山东潍坊，262737；
3. 皖江工学院机械工程学院，安徽马鞍山，243031； 4. 盛瑞传动股份有限公司电控技术研究院，
山东潍坊，261000

出版日期:2024-11-15 发布日期:2024-10-31
基金资助:
安徽省高校自然科学研究重点项目(KJ2021A1210，2022AH052431)；潍坊市科学技术发展计划项目(2021GX024)

Performance experiment of direct injection hydrogen engine under lean combustion mode

Wang Lei1, Li Haiyu2, Luan Kuo3, Zhao Niu3, Chen Guangyuan4

1. School of Automotive Engineering, Weifang Vocational College, Weifang, 262737, China; 2. School of Mechanical and Electrical Engineering, Weifang Vocational College, Weifang, 262737, China; 3. School of Mechanical Engineering, Wanjiang University of Technology, Ma'anshan, 243031, China; 4. Electric Control Technology Research Institute, Shengrui Transmission Co., Ltd., Weifang, 261000, China

Online:2024-11-15 Published:2024-10-31

摘要/Abstract

摘要： 为研究氢气直喷发动机在稀薄燃烧下的燃油经济性、环保性和动力性，进行不同混合气浓度和不同负荷下的氢气直喷发动机燃烧特性研究。结果显示稀薄燃烧可以降低燃烧率和缸内压力升高率，并通过提高工质多变系数降低传热损失，从而显著提高热效率。混合气变稀对火焰传播的影响较大，负荷对燃烧持续期的影响较小。过量空气系数λ在1.1~1.6范围时，NOX排放最高，但加浓和稀释混合气均可降低排放。负荷增加也会显著增加NOX排放。在小负荷下(平均有效制动压力BMEP=0.2 MPa)，当λ>1.8时，NOX排放低于10-5；而在负荷较大(BMEP=1.2 MPa)时，即使λ=2.0，NOX排放仍超过0.002。

关键词: 氢气直喷发动机, 稀薄燃烧, 燃烧特性, 混合气稀释, NOX排放

Abstract: In order to investigate the fuel economy, environmental impact and power performance of hydrogen direct injection engine under lean combustion, a study on the combustion characteristics of hydrogen direct injection engines under different mixture concentration and different load was conducted.The results revealed that lean combustion could reduce the combustion rate and the rate of cylinder pressure rise, while improving thermal efficiency by reducing heat transfer losses through an increased working fluid specific heat ratio. The influence of mixture dilution on flame propagation was significant, whereas the impact of load on combustion duration was relatively minor. The highest NOX emissions were observed within the excess air ratio λ range of 1.1-1.6, but both mixture enrichment and dilution were effective in reducing emissions. Increasing the load also resulted in a significant increase in NOX emissions. At low loads (the mean effective brake pressure (BMEP) is 0.2 MPa), NOX emissions remained below 10-5 when λ exceeded 1.8. However, at higher loads (BMEP=1.2 MPa), even at λ=2.0, NOX emissions still exceeded 0.002.

Key words: hydrogen direct injection engine, lean combustion, combustion characteristics, mixture dilution, NOX emissions

中图分类号:

TK421+.5

王雷, 李海玉, 栾阔, 赵妞, 陈广源. 稀燃模式下直喷氢气发动机性能试验[J]. 中国农机化学报, 2024, 45(11): 125-130.

Wang Lei, Li Haiyu, Luan Kuo, Zhao Niu, Chen Guangyuan. Performance experiment of direct injection hydrogen engine under lean combustion mode[J]. Journal of Chinese Agricultural Mechanization, 2024, 45(11): 125-130.

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[1]	李宇航, 庄继晖, 陈振斌. 数据驱动下农用车辆柴油机NOX排放预测模型[J]. 中国农机化学报, 2023, 44(4): 128-136.
[2]	陈欢欢, 姜戌雅, 刘建彪, 蔡红珍, , 高锋. 牦牛粪生物质燃烧特性及动力学研究[J]. 中国农机化学报, 2023, 44(12): 162-167.
[3]	张美娟, 李游, 吴旭东, 王忠. 柴油机燃用F-T柴油/生物柴油混合燃料的燃烧及排放特性[J]. 中国农机化学报, 2022, 43(9): 109-115.

稀燃模式下直喷氢气发动机性能试验

Performance experiment of direct injection hydrogen engine under lean combustion mode

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