Abstract: Fault tree is a kind of graph in which the events have reverse logic relationship.In this paper, a FTA model of gasoline faults is set up. The different combinatorial pattern of the events that can cause electronic-control injection petrol engine faults and probability of the faults are confirmed ,which will lead a feasible way of further research on a practical fault diagnosis expert system.

Key words: electronic-control injection petrol engine , reliability analysis, fault diagnosis, fault tree (FTA)

摘要： 故障树是一种倒置的图形演绎分析方法.笔者在文中建立了电喷汽油发动机燃烧故障树模型,确定出引 发系统故障原因的各种可能的组合方式和系统发生故障的概率.为进一步研究实用的电喷汽油机故障自诊断 系统提供了一种可行方法.

关键词: 电喷汽油机, 可靠性分析, 故障诊断, 故障树