Common Rail Nozzle DLLA152SM400/105025-4000 Fuel Injector Nozzle

The valve line of the injector nozzle plays the role of controlling the fuel injection volume, maintaining a certain injection pressure and ensuring good pulverization of the fuel injection. If there are signs of damage, it is not sealed during use, and the pulverization of the fuel injection is poor or cannot be atomized. At the same time, there is dripping on the surface of the nozzle hole of the injector nozzle. There are signs of unevenness and damage on the joint plane of the large end of the injector nozzle, which proves that it is not used well. If the defect is on the outer ring, the fuel will leak out during use; if the defect is on the inner ring, the fuel will leak to the oil return hole. The cooperation between the injection hole of the injector nozzle body and the small head of the injector nozzle should not be too loose or too tight. If it is too loose, the pulverization quality will decrease, the pulverization will be less and the oil particles will be thicker, and the sound will not be crisp. If it is too tight, the fuel injection will form a line, the fuel injection will be silent, and if the fuel injection lasts to Repair Technology of Fuel Injection Nozzle Assembly The precision of the cylindrical guide surface of the needle valve is very high, and the assembly gap between it and the needle valve hole is 0.002~0.006mm, and the needle valve must be able to slide freely up and down in the nozzle body hole. The cylindrical guide surface of the needle valve is black, and if the fit is too loose, it is necessary to select a needle valve with a more suitable tightness. If the needle valve and injector body are too tight, you can generally apply engine oil to the cylindrical guide surface of the needle valve first, and then grind the needle valve. If it is very tight, it can be ground with chromium oxide.