造成曲轴烧蚀的直接原因是,曲轴轴颈与轴瓦之间未能形成有效的润滑油膜,两者之间形成干摩擦。造成此现象的原因是:(1)机油品质差。选用的机油质量和黏度等级较低,或不同牌号的机油混用,从而使机油的性能达不到要求;机油在使用过程中混入了大量的灰尘,或柴油机工作温度过高使机油氧化变质; The direct cause of the crankshaft ablation is the failure to form an effective lubricant film between the journal of the crankshaft and the bush, resulting in dry friction between the two. The reasons for this phenomenon are: (1) Poor oil quality. Oil quality and viscosity of the selected level is lower, or mixed with different grades of oil, so that the performance of oil failed to meet the requirements; oil mixed with a lot of dust during use, or diesel engine operating temperature is too high to oxidize the oil deterioration;