Description
Product Overview
The fuel injector is assembled at the front end of the electronic fuel injector. Under high pressure, the fuel is cut into uniform oil mist by the internal needle valve and end face micro-holes, and is combined with the precise control of the electronic control unit for the timing and volume of fuel injection. Under the long-term conditions of high cabin temperature and continuous impingement of diesel containing impurities, the injection holes may get clogged, the sealing surface of the needle valve may wear out, and the clearance between the mating parts may increase. This may result in uneven atomization, engine shutdown with dripping oil, imbalance of power among cylinders, weak acceleration of the engine, excessive black smoke emissions, and a significant increase in fuel consumption. This product features an integrated precision fuel injector that has undergone high-pressure and high-flow performance testing upon leaving the factory. The size and hole positions are standardized, and disassembly and assembly do not require grinding to fit. It is suitable for maintenance of medium and heavy-duty trucks, mining construction machinery, diesel generator sets, and common rail fuel injectors of medium and heavy-duty trucks.
Unique Core Advantages of the Single Product
The straight and elongated smooth guide rod ensures no eccentric wear during reciprocating motion.
The overall straight and elongated rod body is mirror-finished on the outer wall, providing stable guidance within the fuel injector housing during reciprocation, without any unilateral inclination wear. It maintains a micrometer-level sealing gap between the needle valve and the valve seat for a long time, preventing internal leakage of high-pressure fuel and pressure relief, and stabilizing the rail pressure of the system.
The three uniformly arranged end face holes for the fuel injection port ensure thorough atomization and efficient combustion.
The fuel injection port is arranged in three equal parts on the end face, with the hole walls polished without burrs. The high-pressure fuel is divided into fine and uniform oil mist, ensuring adequate mixing of gas and oil in the cylinder, reducing carbon deposits in the cylinder, lowering black smoke emissions, and optimizing fuel utilization.
The central integrated limit flange platform ensures secure assembly and sealing.
The middle section of the valve body is widened to form a limit step for assembly, which precisely fits the installation position of the fuel injector housing during assembly. Combined with a sealing gasket, it completely prevents the leakage of high-pressure fuel and avoids loss of pressure, ensuring stable injection pressure.
The permanent laser engraving of the model number on the outer wall makes it easy to verify the inventory without confusion.
The flange side is etched with the part number DLLA145P574, which is resistant to diesel immersion and wear. This facilitates maintenance, inventory matching, and intuitive clarity for cross-border small package / full-box logistics, reducing the cost of rework due to model confusion.
Overall Nitrogenized Hardened Alloy Steel, Wear-resistant and Compatible with Harsh Conditions
The entire fuel injector is made of high-hardness alloy steel, with a surface nitrogenized hardening treatment. The sealing surface of the needle valve is wear-resistant and scratch-resistant. It has a longer service life in harsh conditions such as mining areas, construction sites with high dust and impurities, and is less prone to frequent replacement.
Application Scenarios
Suitable for medium and heavy-duty long-distance freight trucks, large mining excavators, heavy-duty wheeled loaders, and high-power stationary diesel generators that are equipped with electronic common rail fuel supply systems. It is applicable to heavy-duty electric control diesel engines with fuel injectors that operate continuously at full load in mining areas and construction sites, under high temperature and high dust conditions.
Product Basic Parameters
Product Name: Electronic Common Rail Fuel Injector Assembly
Part Number: DLLA145P574
Main Material: Overall Nitrogenized Hardened Alloy Steel
Structural Characteristics: Straight and elongated guide rod, end face three-hole fuel injection port, central limit flange platform, model number engraved on the outer wall
Application Conditions: 24-hour continuous full-load operation, long-term high cabin temperature, outdoor high-dust heavy-duty electric control diesel engine fuel injectors
Product Status: New precision fuel injector, completed with full calibration and testing for atomization effect, high-pressure sealing, and injection flow upon leaving the factory
Packaging: Each unit is packed in an independent transparent hard protective tube, with plastic plugs at both ends for protection against transportation impacts and scratches to the front fuel injection holes. It supports single-piece, multi-box, and bulk purchasing in cartons, and is compatible with cross-border small package / full-box logistics.
