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 by the fine spray holes at the front end to form uniform and fine oil mist. 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 impurities from diesel fuel, the spray holes may get clogged, the sealing surface of the needle valve may wear out, 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 emissions, and a significant increase in fuel consumption. This product is an integrated precision fuel injector that has undergone high-pressure and high-voltage testing, as well as full-scale flow balance testing at all working conditions upon leaving the factory. The size and position of the holes 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 construction machinery, diesel generator sets, and other vehicles.
Unique Core Advantages of the Single Product
Straight and elongated mirror-guided rod with no unilateral wear during reciprocating motion
The outer wall of the entire straight and long rod is finely ground to mirror finish, ensuring stable guidance within the fuel injector housing and no inclination or unilateral 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.
Conical multi-hole mirror spray holes at the front end, with fine atomization and complete combustion
The conical guide end is combined with multiple groups of fine spray holes. The hole walls are mirror-polished without burrs. The high-pressure fuel is evenly divided into fine oil mist, and the gas and oil in the cylinder are fully mixed, significantly reducing carbon deposits in the cylinder and reducing tail gas black smoke emissions, improving fuel utilization efficiency.
The middle part has an integrated widened limit flange, with a widened limit step in the valve body. During assembly, it precisely fits the installation position of the fuel injector housing, and is combined with a sealing gasket for multiple layers of barrier against high-pressure fuel leakage, preventing pressure loss and ensuring the stability of the injection pressure throughout the process.
The outer wall is permanently engraved with the part number for easy verification during stock preparation and to avoid incorrect parts.
The flange side is etched with the DLLA155P180 model code, resistant to diesel soaking, wiping, and wear. This facilitates cross-border small package / full-box logistics, reducing model confusion and associated rework and losses.
The entire fuel injector is made of high-hardness alloy steel that has been 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 conditions such as mining areas and construction sites with high dust and impurities, reducing frequent replacement and maintenance costs.
Application Scenarios
Suitable for medium and heavy-duty long-distance freight trucks, large mining excavators, heavy-duty wheeled loaders, and high-power fixed diesel generator sets equipped with electronic common rail fuel supply systems. Suitable for large-scale 24-hour full-load, high cabin temperature, and high-dust heavy-duty electronic control diesel engine fuel injectors in mining areas and construction sites.
Product Basic Parameters
Product Name: Electronic Common Rail Fuel Injector Assembly
Part Number: DLLA155P180
Main Material: Overall Nitrogenized Hardened Alloy Steel
Structural Features: Straight and elongated mirror-guided rod, middle widened limit flange, conical multi-hole spray end, outer wall engraved with model number
Application Conditions: 24-hour continuous full-load, long cabin 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 unit is separately packaged in a transparent hard protective tube, 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 purchasing in cartons， and suitable for cross-border small package / full-box logistics.
