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某国有大型企业一辆EQ1108G6D4型汽车,配置康明斯6BT5.9涡轮增压型发动机,在一次常规维护中,仅换了一组活塞环,没过几天便出现发动机动力不如维护前,同时有耗机油现象。据初步分析可能是在装配过程中错将活塞环装成对口,导致动力下降和烧机油现象的产生。经拆检发现第3缸的活塞顶部严重烧蚀(图1),第1、2道活塞环被卡死在活塞环槽内,在气缸的上止口处粘结有
A state-owned large enterprises an EQ1108G6D4-type cars, equipped with Cummins 6BT5.9 turbocharged engine, in a routine maintenance, only changed a group of piston rings, a few days there will be less than before the engine power maintenance, while consumption Oil phenomenon. According to the preliminary analysis, it may be that the piston rings are mistakenly assembled in the assembly process, resulting in the decline of power and the phenomenon of burning oil. After dismantling found that the top of the third cylinder piston ablation (Figure 1), the first and second piston ring was stuck in the piston ring groove, the top of the cylinder at the top of the bond