“由表及里,由简到繁”是我们熟知的故障分析与排除故障的基本原则之一。但是,当在现场排除故障时却往往把这一原则置于脑后。现举两个实例如下。有一台汽油发动机的两相邻气缸不工作,排除故障的人首先怀疑是由于气缸垫冲坏所致。拆下气缸盖后,发现气缸垫密封良好。重新装回的过程中才发现原来是两缸的高压线互相接错了。 “From the table and in, from Jane to Fan ” is one of the basic principles of failure analysis and troubleshooting we are familiar with. However, this principle is often left behind when troubleshooting problems on the ground. Now give two examples as follows. Two adjacent cylinders with a gasoline engine do not work. The first people who troubleshoot are suspected to be due to a cylinder head crash. After removing the cylinder head, the gasket was found to seal well. In the process of reloading it was found that the two high-voltage lines are connected to each other wrong.