我段配属的东风4B型内燃货运机车,经常出现柴油机启动困难和低转速走车停机的故障。尤其在夏季,环境气温高时,该故障更是大量出现,影响了机车的上常运行。由于引起该故障的原因很多,如果未彻底处理,一旦在途中出现此类故障,轻者影响机车的正点运行,重者构成机破。因此,很有必要找出引起此类故障的各种原因,加以归纳、总结,并进行处理。 I section of the Dongfeng 4B-type internal combustion freight locomotives, diesel engine often start difficulties and low-speed car downtime fault. Especially in summer, the ambient temperature is high, the failure is a large number of occurrences, affecting the locomotive on the regular operation. As a result of the failure of many reasons, if not thoroughly dealt with once on the way such failures, the light affect the locomotive’s punctual operation, heavy machine broken. Therefore, it is necessary to find out the causes of such failures, to sum up, summarize and deal with.