There are four main types of fuel injectors for trucks. Spindle needle types electromagnetic injector, ball valve type electromagnetic injector, disc valve type electromagnetic injector, and lower fuel inlet injector.
When injecting oil, the armature drives the needle valve to rise from its seating surface, and fuel is ejected from the precision clearance. In order to fully atomize the fuel, a section of the fuel injection shaft needle is ground at the front end of the needle valve.
The valve needle of the ball valve is light, and the spring preload is large, which can obtain a wider dynamic flow range. The ball valve has an automatic centering function and good sealing performance. At the same time, the ball valve simplifies the structure of the metering part, which is helpful to improve the accuracy of fuel injection.
The combination of a light valve plate and hole valve seat with the magnetically optimized injector assembly makes the injector not only have a large dynamic flow range but also a strong anti-clogging ability.
The bottom fuel supply mode is adopted, which has a very obvious cooling effect on the metering part of the injector, so it can effectively prevent air lock and improve the reliability of the hot start of the vehicle. In addition, the fuel injector with bottom injection can save the fuel manifold and reduce the cost.
In fact, the truck injector is very reliable. If you maintain it regularly, you should have nothing to worry about. However, in some cases, you may have no choice but to replace the complete injector: