classification

(1) Needle type electromagnetic injector

When fuel injection, the armature drives the needle valve to rise about 0.1 mm from its seat surface, and the fuel is ejected from the precise clearance. In order to make the fuel atomized sufficiently, a section of injection shaft needle was grinded out at the front end of needle valve. The suction and falling time of the injector is about 1 ~ 1.5ms.

(2) Ball valve type electromagnetic injector

Ball valve needle weight is light, spring preload is large, can obtain a wider dynamic flow range. The ball valve has the function of automatic centering and good sealing. At the same time, the ball valve simplifies the structure of the metering part, which helps to improve the accuracy of fuel injection.

(3) Disc valve type electromagnetic injector

The combination of light weight valve plate and hole seat with magnetic optimized injector assembly not only has a large dynamic flow range, but also has a strong anti clogging ability.

(4) Lower fuel injector

With the bottom fuel supply mode, the fuel can flow out from the upper part through the injector cavity around the valve seat area, which has a very obvious cooling effect on the metering part of the injector, so it can effectively prevent the generation of air resistance and improve the reliability of hot start of automobile.

In addition, the bottom injection injector can save the fuel manifold and reduce the cost. The fuel injector should be checked and adjusted once when it works for about 700h. If the opening pressure is more than 1MPa lower than the specified value or the carbon deposit on the head of the needle valve is serious, the needle valve should be unloaded and put into the clean diesel oil. The carbon deposit should be scraped off with wood chips, and the injection hole should be dredged with fine steel wire. After installation, the injection pressure difference of each cylinder of the same machine must be less than 1MPa.