某轻型柴油机机油消耗异常成因排查及改进研究

Causeinvestigate and Optimization of High Engine Oil Consumption Fault of A Diesel Engine

本文根据柴油机机油消耗的原理,采用故障树排查方法,对某轻型柴油机机油消耗过高的风险点进行详细的排查,确认了活塞环组的异常运动及磨损的主要原因。通过实施改变环组的顺气、增加一环底面的氮化镀层、保证进气清洁度等改进方案,并经过耐久试验,验证了以上方案可以解决该柴油机机油消耗过高以及活塞环组异常运动和磨损的问题。该故障分析可为柴油机机油消耗异常故障的排查及处理提供一种参考性的技术方案。

According to the principle of diesel engine oil consumption,this paper uses of the Fault Tree Analysis to conduct a detailed investigation on the risk points that will cause excessive oil consumption,and identifies the main causes for abnormal movement and wear of piston ring group.Through the implementation of improvement schemes such as changing the smoothness of the ring group,adding a nitride coating on the bottom of the ring,ensuring the cleanliness of the intake air,and passing endurance tests,it is verified that the problem of high oil consumption of the diesel engine is no longer existed and the abnormal problem of piston ring group is solved.The fault analysis can provide a reference for the treatment of abnormal oil consumption of diesel engine.