Description
Product Overview
The fuel injector is assembled at the front end of the electronic control 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 dense oil mist. The electronic control unit precisely controls the injection timing and fuel quantity based on the rail pressure signal. Under long-term 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 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 features an integrated precision fuel injector that undergoes high-pressure and full-condition flow balance testing upon leaving the factory. The size and position are standardized, and disassembly and assembly do not require grinding for adaptation. It is suitable for maintenance of light commercial vehicles, pickups, and small and medium-sized construction machinery with common rail fuel injectors.
Unique Core Advantages of the Individual Product
Multi-level stepped and elongated mirror guide rods, no unilateral wear during reciprocating motion
The rod body has multiple arc-shaped smooth stepped transitions, and the outer wall is polished with a mirror finish. It provides stable guidance within the fuel injector housing, without any inclination or unilateral wear. It maintains a micrometer-level sealing gap between the needle valve and the valve seat, preventing high-pressure fuel leakage and pressure loss, and stabilizing the common rail system oil pressure.
Front conical multi-micro-hole mirror spray holes, 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 mixture of oil and gas in the cylinder is fully formed, significantly reducing the accumulation of carbon deposits in the cylinder and lowering exhaust black smoke emissions, improving fuel utilization efficiency.
Top integrated widened limit flange, secure assembly and sealing
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, and after being paired with a sealing gasket, multiple layers of barriers prevent high-pressure fuel leakage and avoid pressure loss, ensuring the stability of the injection pressure throughout the process.
The outer wall is permanently engraved with the part number, making it easy to verify inventory without misplacing parts.
The outer side of the flange is etched with the model code L221PBC. It is resistant to diesel soaking, wiping wear, and is intuitive and clear for maintenance inventory, parts matching, and reducing model confusion, resulting in reduced rework and loss.
Overall nitrided and hardened alloy steel, wear-resistant and suitable for harsh conditions
The fuel injector housing is processed by a high-hardness alloy steel unit, with surface nitrided hardening treatment. The sealing surface of the needle valve is wear-resistant and scratch-resistant. It has a longer service life in urban freight, construction site high dust and impure diesel environments, reducing frequent replacement and maintenance costs. Applicable scenarios
This product is suitable for light-duty freight trucks, diesel pickups, small wheeled loaders, and small to medium-sized fixed diesel generators equipped with electronic fuel injection systems. It is applicable for short-distance urban transportation, light-load construction sites, and outdoor environments with varying temperatures and light-duty electronic fuel injection diesel engines. The product is suitable for major overhauls of the fuel injectors.
Product Basic Parameters
Product Name: Electronic Fuel Injection Nozzle Assembly
Part Number: L221PBC
Main Material: Integral Nitrided Hardened Alloy Steel
Structural Feature: Multi-stage stepped and extended mirror guide rod, widened top limit flange, conical multi-hole atomization end, engraved model code on the outer wall
Application Conditions: Continuous light to medium load, engine compartment alternating cold and hot, outdoor dusty environment for light-duty electronic fuel injection diesel engines
Product Status: New precision fuel injectors, factory completed with full calibration and testing of atomization effect, high-pressure sealing, and injection flow
Packaging: Each unit is separately packaged in a transparent hard protective tube, with plastic plugs at both ends for protection against transportation impacts and scratches on the front micro-holes. Supports single-piece, multi-box, and bulk purchase in cartons, and is compatible with cross-border small package / full-box logistics.
