Description
Product Overview
The fuel injector is assembled at the front end of the electronic fuel injector. The high-pressure fuel flows through the internal needle valve and is cut into uniform oil mist by the fine spray holes at the front end. The electronic control unit precisely controls the injection timing and fuel quantity based on the rail pressure signal. Under the long-term working conditions of high cabin temperature and continuous impingement of impure diesel, the spray holes may get clogged, the sealing surface of the needle valve may be worn, and the clearance between the mating parts may expand. This may result in poor atomization, engine shutdown with dripping oil, imbalance in power output of each cylinder, weak engine acceleration, excessive black smoke emission, 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 common rail fuel injectors of medium and heavy-duty trucks, mining machinery, construction machinery, and diesel generator sets.
Unique Core Advantages of the Individual Product
Segmented stepped and lengthened guide rod, no unilateral wear during reciprocating motion
The rod body adopts multi-segment circular arc smooth step transition, with a mirror finish on the outer wall, which is precisely guided in the internal of the fuel injector shell and does not have 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, and stabilizing the common rail system oil pressure.
Integrated widened limit flange in the middle, secure assembly and sealing
The middle section of the valve body is widened with limit steps, which precisely fits the installation position of the fuel injector shell during assembly. Combined with a sealing gasket, multiple layers of barriers prevent high-pressure fuel leakage and avoid oil pressure loss, ensuring the stability of the injection pressure throughout the process.
Fine multi-hole mirror polished spray holes, fine atomization and complete combustion
The inner wall of the front spray hole is finely ground without burrs, and the high-pressure fuel is uniformly cut into fine oil mist. The mixture of gas and oil in the cylinder is fully formed, significantly reducing the accumulation of carbon deposits in the cylinder and lowering the black smoke emissions. It improves the fuel utilization efficiency.
The outer wall is permanently engraved with the part number, making it easy to verify the inventory without misplacing the parts.
The outer side of the flange is etched with the DLLA146P768 model code, which is resistant to diesel soaking, wiping, and wear. The maintenance inventory, parts matching, and logistics are intuitive and clear, reducing the confusion caused by model mismatches and reducing rework and losses.
The entire set of fuel injectors is made of high-hardness alloy steel that is nitrogenized and hardened. The surface is treated with nitrogenization hardening, and the sealing surface of the needle valve is wear-resistant and scratch-resistant. It has a longer service life in harsh environments such as mining areas and construction sites with high dust and impure diesel, reducing the frequency of replacement and maintenance costs.
Application Scenarios
Suitable for medium and heavy-duty long-distance freight trucks, large mining excavators, heavy-duty wheel loaders, and high-power fixed diesel generator sets equipped with electronic common rail fuel supply systems. Suitable for large-scale 24-hour continuous full-load, high cabin temperature, and high-dust heavy-duty electronic control diesel engine fuel injectors for maintenance.
Product Basic Parameters
Product Name: Electronic Common Rail Fuel Injector Assembly
Part Number: DLLA146P768
Main Material: Overall Nitrogenized Hardened Alloy Steel
Structural Characteristics: Segmented stepped and lengthened guide rod, integrated widened limit flange in the middle, front multi-hole atomization end, outer wall engraved with model number
Application Conditions: 24-hour continuous full-load, cabin long-term high temperature, outdoor high-dust heavy-duty electronic control common rail 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 individual transparent hard protective tube is separately packaged, with plastic plugs at both ends for protection against磕碰划伤 the front micro holes during transportation， supporting single-piece， multi-box， and bulk purchase in cartons， and suitable for cross-border small package / full-box logistics.
