一、问题的提出 390柴油机作为我国自行设计的第一代中、小马力柴油机已诞生多年。经过十几年来生产实践的考验,证明390柴油机在设计、制造及其他主要性能方面的情况是良好的,深受山西人民的喜爱。但事物总是“一分为二”的。在长期的生产使用过程中,390柴油机也暴露出一些急待解决的技术问题。例如,在一段时期内由于连杆断裂造成的戳缸 First, the issue put forward 390 diesel engine as our own design of the first generation of small horsepower diesel engine has been born for many years. After more than 10 years of production practice test, that 390 diesel engine in the design, manufacture and other major performance is good, by the Shanxi people’s favorite. But things are always “split in two.” In the long-term production and use process, 390 diesel engine also exposed some urgent technical problems to be solved. For example, a poking cylinder due to a broken connecting rod for a period of time