Description
Product Overview
The fuel injector is assembled at the front end of the mechanical fuel injector. Under high pressure, the fuel pushes the internal needle valve to open, and through the front micro-hole, a fine oil mist is formed, completing the fuel injection work for the cylinder. Under long-term conditions such as high-temperature and heavy-load farming, construction sites, and diesel fuel contaminated with impurities, the injector holes may get clogged, the sealing surface of the needle valve may wear out, and the sealing gap may expand. This will result in uneven atomization, engine shutdown 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 pressure retention and full-condition flow rate balance testing upon leaving the factory. The size specifications are standardized, and disassembly and assembly do not require grinding for adaptation. It is suitable for maintenance and repair of fuel injectors for agricultural machinery, light trucks, small-scale construction machinery, and other diesel engines.
Unique Core Advantages of Each Product
Multi-level stepped short guide rod, coaxial sliding without eccentric wear
The rod body has multiple smooth stepped transitions, the outer wall is finely ground to a mirror finish, and it guides the fuel reciprocally within the fuel injector housing stably without 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 fuel injection output pressure.
Conical sharp tip flow and atomization end, sufficient oil-gas mixture
The conical gradual transition flow structure guides the fuel to spread evenly, the inner wall of the front micro-hole has a smooth mirror finish polishing without burrs, the fuel is cut into concentrated and fine oil mist, the combustion of the mixture in the cylinder is sufficient, reducing the accumulation of carbon deposits in the cylinder and reducing black smoke emissions and fuel consumption.
Top integrated widened limit flange, assembly positioning and sealing are firm
The upper end of the valve body has a widened limit step, during assembly, it precisely fits the installation position of the fuel injector housing, combined with a sealing copper pad, multiple layers of barriers prevent high-pressure fuel leakage and avoid pressure loss, ensuring the fuel injection pressure is stable throughout the process.
The outer wall is permanently engraved with the part number, making it easy to check inventory without misplacing parts.
The side wall of the flange is etched with the DLLA160P50 model code, resistant to diesel soaking, wiping wear, making maintenance, inventory, and component matching intuitive and clear, reducing the cost of rework due to model confusion.
Overall nitrided hardened alloy steel, wear-resistant and suitable for harsh conditions
The entire fuel injector is processed by high-hardness alloy steel, with surface nitrided hardening treatment, the sealing surfaces of the needle valve and valve seat are wear-resistant and scratch-resistant, providing a longer service life in fields with high dust and impurities from diesel, reducing the frequency of disassembly, repair, and replacement.
Application Scenarios
Suitable for agricultural tractors with mechanical direct injection fuel supply systems, light-duty diesel trucks, small wheeled loaders, fixed diesel generator sets, and diesel engine fuel injectors of small-scale mechanical diesel engines used in fields, construction sites, and outdoor environments with high temperatures, low temperatures, and high dust.
Product Basic Parameters
Product Name: Mechanical Direct Injection Fuel Injector Assembly
Part Number: DLLA160P50
Main Material: Overall Nitrided Hardened Alloy Steel
Structural Characteristics: Multi-level stepped short guide rod, conical sharp tip atomization end, top widened limit flange, outer wall engraved with model code
Application Conditions: Continuous light to heavy loads, engine compartment alternating cold and hot temperatures, outdoor high dust and small-scale mechanical diesel engine fuel injectors
Product Status: New precision fuel injector, factory completed with full calibration and testing of atomization effect, high-pressure sealing, and fuel injection opening pressure
Packaging: Each unit is independently packaged in a transparent hard protective tube, with plastic plugs at both ends for protection against transportation impacts and scratches to the front micro-holes. It supports single-piece, multi-box, and bulk purchasing in cartons, suitable for cross-border small package logistics.
