喷油器经长期使用后,喷油器体的密封平面受针阀上台肩的撞击而磨损呈深坑,使针阀的工作升程增大,从而使发动机的动力性能和经济性严重恶化,特别是对采用Z S 15 S 15型针阀偶件的喷油器更为严重。为了修复喷油器体平面的磨损,传统的方法是将密封平面的磨损凹坑磨平。它需要昂贵的精密平面磨床,而且当磨损深坑过大时,硬化热处理层将会在加工中被磨去,使喷油器体的使用寿命大大降低。经过试验研究,我校采用了一种新方法,它不需对磨损的喷油器体进行任何加工,必要时也只需对平面稍加研磨,在喷油器体及针阀偶件 After long-term use of the injector, the sealing plane of the injector body is deeply pitted and worn by the impact on the shoulder of the needle valve, so that the working lift of the needle valve is increased, so that the dynamic performance and economy of the engine are seriously deteriorated, In particular, injectors using the ZS 15 S 15 needle valve coupling are more critical. In order to repair the injector body surface wear, the traditional method is to seal the wear flat surface wear flat. It requires expensive precision surface grinder, and when the wear pit is too large, the hardened heat treatment layer will be worn in the process, so that injector body life greatly reduced. After the experimental study, our school adopted a new method, which does not need to wear any body of the injector body, if necessary, only a little grinding on the plane, the injector body and needle valve parts