| 螺旋气门的结构优化及对无节气门汽油机燃烧性能的影响 |
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| 引用本文： | 韩康,常英杰,谢宗法,房佩鸽,张晋群,张坤.螺旋气门的结构优化及对无节气门汽油机燃烧性能的影响[J].汽车工程,2021,43(1):27-33,26. |
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| 作者姓名： | 韩康 常英杰 谢宗法 房佩鸽 张晋群 张坤 |
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| 作者单位： | 山东大学机械工程学院,济南 250061;山东大学,高效洁净机械制造教育部重点试验室,济南 250061;山东大学机械工程学院,济南 250061;山东大学,高效洁净机械制造教育部重点试验室,济南 250061;山东大学机械工程学院,济南 250061;山东大学,高效洁净机械制造教育部重点试验室,济南 250061;山东大学机械工程学院,济南 250061;山东大学,高效洁净机械制造教育部重点试验室,济南 250061;山东大学机械工程学院,济南 250061;山东大学,高效洁净机械制造教育部重点试验室,济南 250061;山东大学机械工程学院,济南 250061;山东大学,高效洁净机械制造教育部重点试验室,济南 250061 |
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| 基金项目： | 山东省重点研发计划项目(2019JZZY010914);国家重点研发计划项目(SQ2020YFF0416411)资助。 |
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| 摘 要： | 由于进气方式的改变,气道喷射式无节气门汽油机中小负荷时泵气损失显著降低,但燃烧性能却明显恶化.为改善其燃烧性能,本文中设计了一种在进气过程中能产生较强进气涡流的螺旋气门,并使用仿真软件STAR-CCM+对螺旋气门的主要结构参数进行了优化.在稳流气道试验台上测量其进气涡流比和流量系数,证明该螺旋气门在开启升程较小时能产生...
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| 关 键 词： | 无节气门汽油机 螺旋气门 涡流比 仿真计算 燃烧性能 |
Structure Optimization of Helical Valve and Its Influence on Combustion Performance of an Unthrottled SI Engine |
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| Han Kang,Chang Yingjie,Xie Zongfa,Fang Peige,Zhang Jinqun,Zhang Kun.Structure Optimization of Helical Valve and Its Influence on Combustion Performance of an Unthrottled SI Engine[J].Automotive Engineering,2021,43(1):27-33,26. |
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| Authors: | Han Kang Chang Yingjie Xie Zongfa Fang Peige Zhang Jinqun Zhang Kun |
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| Institution: | (School of Mechanical Engineering,Shandong University,Jinan 250061;Shandong University,Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education,Jinan 250061) |
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| Abstract: | Due to the change of air intake mode,the pumping loss of port injection(PI)unthrottled SI en?gine at medium and low loads is significantly reduced but its combustion performance is obviously deteriorated.In order to improve the combustion performance,a helical valve which can generate strong swirl in the intake process is designed,and the main structural parameters of the helical valve are optimized with the simulation software STAR-CCM+.The intake swirl ratio and the flow coefficient are measured on the steady flow test bench,which proves that the helical valve can generate strong intake swirl at small lift and improve the air intake flow state and fu?el air mixing in the cylinder of the unthrottled SI engine.The helical valves are installed in an unthrottled SI engine with fully variable hydraulic valve system.The test results show that the intake swirl generated by the helical valve significantly improves the combustion rate of the unthrottled SI engine under low and medium load conditions and re?duces cycle fluctuations,so that the fuel economy performance has been significantly improved. |
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| Keywords: | unthrottled SI engine helical valve swirl ratio simulation calculation combustion performance |
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