Diesel Injector Fuel Injector 0445120455 compatible with injector Cummins QSB4.5 / QSB6.7 Dodge/ Dongfeng/Komatsu

Reasons for the decrease in service life of common rail injectors

(1) During the repair process of the fuel injector, the oil inlet filter at the position of the oil inlet joint has not been replaced, and it is difficult to clean the impurities and dirt accumulated here, and the carbon deposit inside the nozzle is also difficult to clean. During the repair and use, these impurities and dirt are easy to come out to block the small holes and accelerate the wear of the internal moving parts of the injector (as shown in Figure 3). When the particles block the oil inlet hole of the valve seat, when the valve ball is closed, the high-pressure fuel cannot enter the control chamber smoothly, resulting in the failure of the valve stem to fall, resulting in direct injection of the injector. When the particles are stuck in the guide part of the needle valve of the nozzle, the needle valve of the nozzle is stuck, and the direct injection of the fuel injector or the phenomenon of no fuel injection of the fuel injector will occur.

(2) The car owner added inferior diesel (containing sulfur and water) to affect the service life of the fuel injector. The sulfur in the oil is easy to oxidize when the temperature is high, which greatly increases the corrosion of diesel and accelerates the internal moving parts of the fuel injector. Wear and tear, and the water in the oil has more dissolved gas inside. During the high-low pressure conversion process, the dissolved gas will be precipitated in large quantities and cause gas explosion, resulting in the risk of cracking of the valve sleeve. At the same time, the water in the oil will also cause Parts are rusted.