典型磨损情况下的内燃机性能退化预测  

Analysis of Internal Combustion Engine Performance Degradation at Classic Wear Situations

作　　者：孟祥慧[1] 谢友柏[1] 戴旭东[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《摩擦学学报》2009年第5期469-474,共6页Tribology

基　　金：国家自然科学基金资助项目(50805091;50705055);国家重点基础研究发展计划973资助项目(2006CB705402);中国博士后基金资助项目(20070410720)

摘　　要：通过内燃机热力学建模,考察了两类典型的磨损情况对整机性能的影响:一类是由于磨损和变形而引起的气门间隙变化(进而导致气门升程变化),另一类是由于缸套-活塞组件之间的磨损而引起的漏气间隙变化.通过分析可知,发动机在运行中的磨损等结构退化现象使发动机的性能大幅下降.因此,应当在设计阶段通过抗磨损的摩擦学设计等手段,延长关键部件的正常工作寿命.The effects of two classic wear situations on the engine performance were studied by building a thermodynamic model of internal combustion engines. The first situation was the variation of valve clearance resulting from the wear and distortion of the distribution mechanism. The second situation was the variation of blow by clearance results from the wear of cylinder liner - piston assembly. It was shown from the simulation that the engine performance declined markedly in the two wear situations. Therefore, proper tribological measurements should be adopted to prolong the no -failure lifetime of key parts at design stage.

关 键 词：性能退化 磨损 热力学模型 内燃机 

分 类 号：TK42[动力工程及工程热物理—动力机械及工程] TH12[机械工程—机械设计及理论]