Hot Sale Common Rail Nozzle C7 for C7 Injector Injection Nozzle Diesel Engine Part

Structural design and working principle
Axis needle injector nozzle: When injecting fuel, the armature drives the needle valve to rise about 0.1mm from its seat surface, and the fuel is sprayed out from the precision gap. The injection shaft needle at the front end of the needle valve can fully atomize the fuel. The shaft needle moves up and down in the spray hole, which can play a certain self-cleaning role and is not easily completely blocked by impurities. It is beneficial to extend the service life under some working conditions.
Hole injector nozzle: The multi-spray hole design can fully atomize the fuel and meet the engine's high requirements for fuel injection quality. However, the spray hole diameter of the hole injector is small, which is easily blocked by impurities, carbon deposits, etc. in the fuel. Once blocked, it will affect the injection effect and even cause damage to the injector. From this perspective, its service life may be affected to a certain extent.

Use environment and working conditions
Fuel quality: If the fuel used is of poor quality and contains more impurities, colloids, etc., it will affect the life of both nozzles. However, due to its structural characteristics, the shaft needle nozzle is relatively difficult to be blocked. In the case of poor fuel quality, it may have certain advantages and its service life is relatively more guaranteed.
Engine operating conditions: Under high-speed and high-load engine conditions, the hole-type injector needs to complete a large amount of fuel injection in a short period of time. The injection frequency is high, and the nozzle is subjected to greater pressure and impact, which is easy to cause wear and tear, and may shorten the service life. Under this condition, although the shaft needle injector will also be worn, due to its relatively simple structure and small needle valve movement, the degree of wear may be relatively light. However, if the engine operating conditions are relatively stable, the hole-type injector can also adapt well, and its service life can also be guaranteed.

Maintenance and maintenance conditions
Regular cleaning: Whether it is a shaft needle or a hole-type injector nozzle, regular cleaning is the key to extending the service life. Regular cleaning can remove carbon deposits, impurities, etc. on the surface of the nozzle and keep the injector in normal working condition. If cleaning and maintenance can be carried out according to the prescribed maintenance cycle, both nozzles can have a longer service life.
Correct installation and debugging: When installing the injector, if it is improperly installed, such as the shaft needle injector is installed too tight or too loose, it may cause the needle valve to move poorly or seal poorly; if the hole injector is not installed properly, the spray hole angle may deviate, affecting the injection effect, which will shorten the service life of the nozzle. Therefore, correct installation and debugging are crucial to the life of both.
Generally speaking, under the same use environment and maintenance conditions, the shaft needle injector nozzle is slightly better in anti-clogging and adaptability to harsh working conditions due to its structural characteristics, and its service life may be relatively longer. However, if the hole injector nozzle can be well maintained to ensure the fuel quality and stable engine working conditions, its service life can also be effectively extended, which is equivalent to the shaft needle injector nozzle.