6P125ZQ型柴油机研制中拉缸问题分析

６Ｐ１２５ＺＱ型柴油机研制中拉缸问题分析秦司闵吕继汉（大连理工大学内燃机研究所１１６０２４）关键词：卧式柴油机；加工；工艺／拉缸分类号：ＴＫ４２６６Ｐ１２５ＺＱ型柴油机是在６１２５ＷＱ型柴油机的基础上由多单位联合研制的卧式车用发动机．经增压强化后，...

Analyses of scuffing of cylinder bore in 6P125ZQ diesel engine

The principle of the generation of the early scuffing of cylinder bore in a diesel engine, 6P125ZQ, is introduced. Having analyzed all the scuffing, the authors point out that an incorrect cylinder process may cause scuffing, especially a milling machine with heavy vibration can't be used in the milling cylinder bore. Another factor of the scuffing occurrence is the unsuitable cleanrance between the piston top and the cylinder. For the engine in our investigation, its cylinders are indirectly coaled, the scuffing is also related to the deformation of the engine block. So that, it is necessary to improve the casting technique of the engine block.