Description
Product Overview
The fuel injector is assembled at the front end of the electronic fuel injector. The high-pressure fuel passes through the internal needle valve and the front micro-hole for atomization, and is precisely controlled by the electronic signal to form the fuel injection pattern. Under the long-term working conditions of high cabin temperature and continuous impingement of impure diesel, the fuel injection holes may get clogged, and the sealing surface of the needle valve may wear out. This may result in uneven atomization, engine shutdown dripping oil, imbalance in the work of each cylinder, reduction in engine power, excessive black smoke emission, and a significant increase in fuel consumption. This product features an integrated precision fuel injector that is completed with high-pressure resistance and full-condition flow detection upon leaving the factory. The size specifications are standardized, and disassembly and assembly do not require grinding for adaptation. It is suitable for maintenance of medium and heavy-duty trucks, construction machinery, and generator sets with common rail fuel injectors.
Unique Core Advantages of the Individual Product
Segmented stepped elongated guide rod, coaxial movement without eccentric wear
The long rod adopts a multi-level smooth stepped transition structure, which guides stably within the fuel injector housing and has no unilateral inclination wear. It maintains a micrometer-level sealing gap between the needle valve and the valve seat for a long time, preventing high-pressure fuel leakage and depressurization.
Integrated limit flange in the middle, secure assembly and sealing
The middle section of the valve body is widened with a limit step, which fits precisely with the fuel injector housing during assembly. After being combined with a sealing gasket, it completely prevents the leakage of high-pressure fuel and stabilizes the fuel injection pressure, avoiding fluctuations in the rail pressure.
Multiple micro-holes on the front end with polished mirror surface for fine atomization, thorough combustion
The inner walls of the multiple groups of fine spray holes at the end are finely ground with a mirror finish without burrs. The high-pressure fuel is cut into fine and uniform oil droplets, and the mixture of oil and gas in the cylinder is fully formed, reducing carbon deposits in the cylinder and lowering black smoke emissions and fuel consumption.
Permanent engraving of the model code on the outer wall, making it easy to check inventory without misplacing parts
The outer side of the flange is laser-etched with the DLLA142P221 part number, resistant to diesel soaking, wiping, and wear. This facilitates maintenance, inventory matching, and reduces the cost of incorrect installation and rework.
Overall nitrided and hardened alloy steel, wear-resistant and suitable for harsh conditions
The entire fuel injector is processed with high-hardness alloy steel, undergoes surface nitriding hardening treatment, and the sealing surface of the needle valve is wear-resistant and scratch-resistant. It has a longer service life in areas with high impurity diesel in mining and construction environments, reducing the frequency of replacement. Applicable scenarios
This product is suitable for medium and heavy-duty long-distance freight trucks with electronic control common rail fuel supply system, large mining excavators, heavy-duty wheeled loaders, and high-power fixed diesel generators. It is applicable to mining areas and construction sites for 24-hour continuous full-load operation under high temperature and high dust conditions. It is suitable for the overhaul of large electronic control diesel engine fuel injectors.
Product basic parameters
Product name: Electronic Control Common Rail Fuel Injector Assembly
Part number: DLLA142P221
Main material: Integral nitrided hardened alloy steel
Structural features: Segmented stepped elongated guide rod, central limiting flange, front multi-hole spray end, outer wall engraved model code
Application conditions: 24-hour continuous full-load operation, long-term high-temperature in the engine compartment, outdoor high-dust heavy-duty electronic control common rail diesel engine fuel injector
Product status: New precision fuel injector, factory completed with full calibration and testing of atomization effect, high-pressure sealingity, and spray flow rate
Packaging: Each unit is separately packaged in an independent transparent hard protective tube, with plastic plugs at both ends for protection, preventing damage to the front micro-holes during transportation, supporting single-piece, multi-box, and bulk purchase in cartons, and compatible with cross-border small package / full-box logistics.
