High Quality New Common Rail Injector Control Valve F00VC01509 Valve Assembly for Fuel Injector Engine Spare Parts

In the process of bench verification, the power and fuel consumption of a diesel engine were continuously reduced. After testing, the oil quantity of the injector was reduced, and it was found that the sealing seat of the nozzle needle valve body was seriously worn. According to the test data, the wear of the sealing seat surface of the needle valve body is caused by the excessive impact force on the sealing seat surface when the injector needle valve is set. By improving the injector control valve and reducing the diameter of the needle valve, the impact force of the needle valve on the sealing seat surface is reduced. The improved injector has been verified by the engine durability. During the durability test, the power and fuel consumption are stable, and the wear of the pin valve body seal seat is still within the limit value. The problem is solved. The solution of this problem provides experience and reference for the design of injector control valve, and provides data support for the impact force that the sealing seat of the needle valve body can withstand.The wear of the needle valve body seat of diesel injector seriously affects the shape of fuel spray and fuel injection characteristics. Aiming at the damage caused by the needle valve coupling under the action of high frequency and high stress impact cycle, Contact fatigue test, metallographic microscope (OM) with image analysis system and thermal field scanning electron microscope were used to study the wear failure of the coating layer of the needle valve seat and the deformation behavior of the needle valve seat under different stress and loading modes. The results show that the main fatigue damage mode of the needle valve coupling under different loading modes is the contact fatigue damage of the end coating of the needle valve base. Among them, the surface contact stress distribution of the top loading clockwise valve body is uniform, and the fatigue limit is high (228 MPa), while the step surface loading is prone to uneven loading force, resulting in fatigue damage first concentrated in a half circle area, fatigue damage and damage are uneven, and the fatigue limit is small, only 74.6% of the top loading.