中文摘要：

电控高压共轨喷油器喷油嘴内部针阀加工的表面质量,影响了喷油嘴的各项特性,从而影响到整个柴油机的使用性能与排放性能.通过数理统计分析方法与实验研究相结合,对针阀传统加工工艺存在的问题进行了分析研究,对针阀顶端密封锥面处出现划痕的现象进行了理论分析与实验验证,并通过分析对传统加工工艺的加工参数进行了修改与优化,有效的减少了针阀顶端密封锥面处磨削划痕的出现概率,保证了喷油嘴的加工质量,增强其使用性能与寿命.

英文摘要：

The surface quality of needle in the injector nozzle has a great effect on the whole diesel engine performance. Through the mathematical statistics analytical method and the experimental study, it investigates the problems of the traditional machining parameter and the scratches appear on the seat of the needle, and then optimizes the parameters to reduce the scratch on the needle surface to ensure quality and usability of the nozzle.