汽车LPG燃料燃烧特性

基金项目:

陕西省科学技术厅资助项目 98K09-G3

Combustion characteristics of LPG fueled vehicle

1.
Institute of Internal Combustion Engine, Shanghai Jiaotong University, Shanghai 200030, China
2.
School of Automobile, Chang'an University, Xi'an 710064, China

摘要: 为了对LPG发动机燃烧系统的设计、开发提供理论支持, 研究测试了不同转速、负荷下LPG燃烧的示功图, 计算分析了LPG燃烧过程中压力、压力升高率、累计放热量、放热速率等影响燃烧的主要参数, 并与汽油相应工况下的燃烧特性进行了对比分析。结果表明, LPG在燃烧性能上与汽油存在较大差异, LPG燃烧速度慢, 燃烧持续时间长, 而且在小负荷区域LPG的燃烧完全程度较差, 随着负荷的增加燃烧情况改善。
- 汽车 /
- 燃料 /
- 液化石油气 /
- 燃烧特性
Abstract: The work diagrams in different speeds and loads were measured, and the main parameters such as pressure, rise rate of pressure, heat release quantity and heat release rate were analyzed. The results show that there are great differences between LPG and gasoline on the combustion characteristics; the combustion velocity of LPG is slower, and the combustion duration is longer than gasoline; the combustion of LPG is imperfect when load is light, but it is improved with load increasing.
- vehicle /
- fuel /
- LPG /
- combustion characteristics
注释:

1) LIU Sheng-quan, male, professor, 86-29-2334466, jtxny@chd.edu.cn

图 1 试验仪器布置

Figure 1. Test system

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图 2 转速对示功图的影响

Figure 2. Work diagrams in different speeds

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图 3 转速对压力升高率的影响

Figure 3. Rise rate of pressure in different speeds

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图 4 转速对累计放热量曲线的影响

Figure 4. Heat release quantity in different speeds

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图 5 转速对放热率曲线的影响

Figure 5. Heat release rate in different speeds

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图 6 负荷对示功图的影响

Figure 6. Work diagrams in different loads

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图 7 负荷对压升率的影响

Figure 7. Rise rate of pressure in different loads

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图 8 负荷对累计放热量影响

Figure 8. Heat release quantity in different loads

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图 9 负荷对放热率影响

Figure 9. Heat release rate in different loads

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表 1 发动机技术参数

Table 1. Parameters of test engine

发动机型号 HH368Q 压缩比 8.7

缸径/mm 68.5 排量/L 0.796

行程/mm 72 标定功率/kW 26.2

连杆长/mm 112 标定转速/r·min^-1 5500

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[1]	孙济美. 天然气和液化石油气汽车[M]. 北京: 北京理工大学出版社, 1999.
[2]	谢晓敏. 车用气体燃料燃烧机理研究[D]. 西安: 长安大学, 2002.
[3]	刘永长. 内燃机工作过程模拟[M]. 武汉: 华中理工大学出版社, 1996.
[4]	熊树生. JV481Q发动机燃用液化石油气的燃烧特性与功率恢复[J]. 内燃机工程, 2001, 22 (1): 82—85. https://www.cnki.com.cn/Article/CJFDTOTAL-NRJG200101018.htm XIONG Shu-sheng. Combustion characteristics and power recovery of JV481Q engine running on LPG[J]. Chinese Internal Combustion Engine Engineering, 2001, 22(1): 82- 85. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-NRJG200101018.htm
[5]	RameshB Poola. The effectof oxygen-enriched intake air onFFV exhaust emissions using M85[J]. SAE961177.
[6]	StoneC R. Cycle-to-cycle variations in spark ignition engine[J]. SAE960612.
[7]	HU ANG Zuo-Hua. Influence of fuel injection tim ing oncombustion and emission in direct injection natural gas engine[J]. Transactions ofCsice, 2001, 19 (5): 417—423.