| 天然气发动机空燃比控制与试验研究 |
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| 引用本文： | 赵春生,刘江伟,顾维东,黄波吉,李双旭.天然气发动机空燃比控制与试验研究[J].内燃机与配件,2021(4). |
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| 作者姓名： | 赵春生 刘江伟 顾维东 黄波吉 李双旭 |
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| 作者单位： | 中国北方发动机研究所;无锡动力工程股份有限公司 |
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| 摘 要： | 分析了精确控制天然气发动机过量空气系数控制策略,进行了过量空气系数对发动机经济性、动力性和排放性影响的试验,标定出发动机理想过量空气系数控制Map。对开、闭环进行了对比试验,试验结果表明,闭环控制精度和稳定性优于开环控制;过量空气系数对于发动机经济性的影响非常明显,经济性最好时的过量空气系数大于NOx排放量最大时对应的过量空气系数,HC排放随着过量空气系数增大而增大。通过优化,该发动机综合性能达到较理想状态。
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| 关 键 词： | 闭环控制 过量空气系数 性能 排放 |
Analyses Study on Mixer Structure of CNG Engine |
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| ZHAO Chun-sheng,LIU Jiang-wei,GU Wei-dong,HUANG Bo-ji,LI Shuang-xu.Analyses Study on Mixer Structure of CNG Engine[J].Internal Combustion Engine & Parts,2021(4). |
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| Authors: | ZHAO Chun-sheng LIU Jiang-wei GU Wei-dong HUANG Bo-ji LI Shuang-xu |
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| Affiliation: | (China North Engine Research Institute,Tianjin 300400,China;Wuxi Power Engineering Co.,Ltd.,Wuxi 214105,China) |
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| Abstract: | The effect of mixer structure on sufficient mixing and appropriate scale between compressed natural gas and air are very important.Academic calculation and analysis result show the equation of mixer throat pipe and natural gas intake diameter in engine normal work process.Based relation between Air excess/CNG ratio and mean effective pressure,structure of mixer pipe is improved and designed for a 3.7 liter displacement engine.Rationality of mixer design is validated by air excess ratio test with the engine experiment. |
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| Keywords: | feedback system air fuel ratio correspond hole diameter air excess/CNG ratio |
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