The fuel injector consists of five core components, namely the solenoid assembly, the armature assembly, the valve assembly, the fuel injector body and the nozzle matching parts.
Firstly, the solenoid assembly includes multiple parts such as the coil, the core, the chamber, the electrical connector and the tightening cap. When electrified, it can generate electromagnetic force to drive the armature disc to move, thus realizing the control of the nozzle needle valve.
Secondly, the armature assembly is composed of components like the armature core, the armature disc, the guiding mechanism, the buffer gasket, the valve ball and the supporting seat. Under the action of electromagnetic force, the armature assembly can move up and down and is one of the key components for the injection control of the fuel injector.
Next, the valve assembly consists of two closely matched parts, the valve seat and the ball valve. The fitting clearance between them is only 3 to 6 micrometers. The valve assembly plays an important role in the fuel return control of the fuel injector.
In addition, the fuel injector body is the main structure of the fuel injector. It contains high and low pressure oil passages and is responsible for withstanding the pressure generated when the fuel injector is working.
Finally, the nozzle matching parts are composed of the needle valve and the needle valve body, and its structure is similar to that of the traditional mechanical nozzle. The nozzle matching parts are responsible for accurately injecting fuel into the combustion chamber and are the key components for forming the fuel mist and achieving precise injection.
