汽油直接喷射系统故障因素发生率求权与分析  

Incidence of Failure Factors for Gasoline Direct Injection System

作　　者：柳炽伟[1] 景玉军[1] 

机构地区：[1]中山职业技术学院机电工程系,广东中山528404

出　　处：《重庆交通大学学报（自然科学版）》2014年第3期155-160,共6页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：中山市2012年工业攻关计划项目(20123A360)

摘　　要：结合汽车故障诊断专家经验,构建了汽油直接喷射系统失效的故障树,分析了4种主要故障形式的最小割集,依此建立层次模型。利用层次分析法,定量计算出系统各底层事件发生概率的权值,通过排序找出影响系统可靠性的薄弱环节。对燃油泵、喷油器、高压油泵与油压调节器、燃油泵控制单元、进气翻板位置传感器等高重要度部件进行可靠性分析,为系统优化改进、使用维护、故障诊断的效率提升提出建议。The gasoline direct injection system fault tree was established combining with the experience of automobile fault diagnosis expert. The minimal cut sets of 4 essential fault models were analyzed,and then a three-level structure model was established. The weight of each basic event occurrence probability in the fault tree was obtained by analytic hierarchy process,and the weak link of the system reliability was found out by sorting. The reliability of the high importance components including fuel pump,fuel injector,high pressure fuel pump,and fuel pump control unit were analyzed. Useful recommendations for system optimization and maintenance are proposed and the efficiency of fault diagnosis is improved.

关 键 词：车辆工程 发动机 汽油直接喷射 可靠性分析 

分 类 号：U464.12[机械工程—车辆工程]