燃烧室抛光技术对汽油机经济性影响的研究  

Effects of Combustion Chamber Polishing Technology on Economic Performance of a Gasoline Engine

作　　者：叶彩霞[1] 黄昭明 王利 陈泓 潘金元[4] YE Caixia;HUANG Zhaoming;WANG Li;CHEN Hong;PAN Jinyuan(School of Mechatronical Engineering,Anqing Vocational and Technical College,Anqing 246003,Anhui,China;School of Mechanical Engineering,Wanjiang University of Technology,Ma'anshan 243031,Anhui,China;School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Automotive Engineering&Technology Research Institute,Chery Automobile Co.,Ltd.,Wuhu 241006,Anhui,China)

机构地区：[1]安庆职业技术学院机电工程学院,安徽安庆246003 [2]皖江工学院机械工程学院,安徽马鞍山243031 [3]上海理工大学机械工程学院,上海200093 [4]奇瑞汽车股份有限公司汽车工程技术研发总院,安徽芜湖241006

出　　处：《机械科学与技术》2024年第6期1000-1005,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：安徽省高校自然科学研究重点项目(KJ2019A1195,KJ2020A0837,2022AH052431)。

摘　　要：在一台单缸汽油机上,进行了燃烧室壁面抛光前后燃烧相位、燃烧持续期与平均指示热效率相互影响变化规律的试验研究。结果表明:单缸汽油机以化学计量空燃比、低负荷、低圧缩比运行时,抛光后的燃烧室传热损失减少、经济性改善,平均指示热效率从40.8%上升到了42.2%,而随着负荷的增大、压缩比的提高,抛光后燃烧室传热损失减小带来的爆震效果增强,燃烧相位推迟和燃烧持续期延长,最终导致平均指示热效率下降;当汽油机以稀薄燃烧模式运行时,平均指示热效率上升,最高热效率超过45%;当汽油机进入爆震区域以10.5 bar负荷运行时,抛光后燃烧室传热损失减少增强了爆震效果,导致平均指示热效率相比于抛光前总体下降。An experimental study of the interaction between combustion phase,combustion duration and average indicated thermal efficiency of a single-cylinder gasoline engine before and after combustion chamber wall polishing was carried out.The results show that when the single-cylinder gasoline engine operates at stoichiometric air-fuel ratio,low load and low pressure ratios,the heat transfer loss of the polished combustion chamber wall is reduced and the economic performance is improved,and the average indicated thermal efficiency increases from 40.8%to 42.2%.With the increase of load and compression ratios,the knock effect caused by the reduction of heat transfer loss of the polished combustion chamber wall is enhanced,the combustion phase is delayed and the combustion duration is prolonged,and finally the average indicated thermal efficiency decreases.When the gasoline engine operates in the lean combustion mode,the average indicated thermal efficiency increases greatly,and the maximum thermal efficiency exceeds 45%.When the gasoline engine enters into the knock area and operates at a load of 10.5 bar,the heat transfer loss after wall polishing is reduced and the knock effect is enhanced,resulting in the overall decrease of the average indicated thermal efficiency compared with that before wall polishing.

关 键 词：汽油机 燃烧室 壁面抛光 燃烧相位 燃烧持续期 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]