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1 问题的提出 东风4Ｄ型机车自 1997年于我段投入运用至今已有 4年之久 ,无论是定检还是碎修情况调查 ,自动过渡故障问题均较为突出。另外 ,由于检修工作在库内进行 ,很难提供一个稳定的 85ｋｍ/ｈ速度信号对机车进行测试 ,从而造成检修电工仅仅是凭借经验进行相关电器元件
1 PROBLEM PROBLEMS Dongfeng 4D locomotive has been in operation for 4 years since I was put into operation in 1997. No matter it is a survey of fixed inspection or broken repair, problems of automatic transition failure are all outstanding. In addition, due to maintenance work carried out in the library, it is difficult to provide a stable 85km / h speed signal to test the locomotive, resulting in the maintenance electricians only by virtue of experience related to electrical components