Description
Product Overview
The valve assembly is the core component for controlling oil pressure within the electronic fuel injector. It uses an electromagnetic valve to drive the needle valve to open and close, precisely controlling the timing and amount of high-pressure fuel injection. Under conditions of long-term impurities in diesel fuel, continuous high-temperature and high-pressure erosion, the inner wall of the valve body gets scratched, the sealing surface of the needle valve wears out, and the control oil hole gets clogged. This can lead to poor fuel injection closure, engine shutdown dripping, imbalance in the performance of each cylinder, soaring engine fuel consumption, and excessive black smoke in the exhaust. This product features an integrated precision valve assembly that has completed high-pressure sealing and flow linearity testing upon leaving the factory. The dimensions are standardized, and disassembly and assembly do not require grinding for compatibility. It is suitable for maintenance and repair of electric fuel injectors in medium and heavy-duty trucks and large construction machinery.
Unique core advantages of this product
The cylindrical integral nitrided black valve body is wear-resistant and resistant to high pressure, and is not prone to scratching.
The valve body is made of high-hardness alloy steel and is formed as a whole. Its surface is treated with nitriding for wear resistance, and the inner wall is finely ground to a mirror finish. It maintains a micrometer-level sealing gap with the needle valve disc. Under long-term high-pressure fuel and hard impurities erosion, it is not prone to scratches or deformation, and thus avoids internal oil pressure leakage and fuel dripping.
Multiple standardized precise oil control holes on the valve body, with linear and uniform fuel injection response.
The valve body side surface is equipped with standardized oil control and pressure relief holes. The hole positions and diameters have high precision. Under high and low loads, the oil pressure is relieved and the opening and closing response is not delayed, balancing the fuel injection volume of each cylinder, and improving acceleration jolts, idle jitter, and obvious exhaust color differences.
The integrated precision needle valve disc is matched with the original assembly needle valve disc. The valve head and valve seat have a high degree of fit, and the fuel injection is completely cut off at the moment of completion, avoiding continuous fuel dripping into the cylinder during engine shutdown and accumulation of carbon. This improves the difficulty of cold start, black smoke during idle, and other faults.
The permanent laser-etched part number and traceability QR code on the valve body side wall, which are resistant to diesel soaking, wiping wear, and intuitive for maintenance stock and accessory matching, effectively avoiding incorrect installation and rework.
The non-scratch micro-hole grinding process prevents oil from accumulating and getting stuck in the valve path.
The inner wall of the control oil hole is mirror-polished without machining burrs, making it difficult for diesel gums and fine impurities to adhere and accumulate, reducing the frequency of valve component sticking and fuel injection interruption, and prolonging the overall service life of the fuel injector. Applicable scenarios
Compatible part number: 0445120303. This part is designed to be used with electronic control common rail fuel injectors. It is suitable for medium and heavy-duty long-distance freight trucks, large mining excavators, heavy-duty wheeled loaders, and high-power stationary diesel generators. It is applicable to heavy-duty electric control diesel engines in mining areas and construction sites, suitable for 24-hour full-load operation under high temperature and high dust conditions. This product is for major overhaul of fuel injectors.
Product basic parameters:
Product name: Electronic control fuel injector valve assembly
Part number: 0445120303
Main material: Integral nitrided hardened alloy steel
Structural features: One-piece cylindrical valve body, end face porous oil control structure, matching precision needle valve disc, outer wall engraved model code
Operating conditions: 24-hour continuous full-load operation, long-term high-temperature in the engine compartment, outdoor high-dust heavy-duty electric control common rail diesel engine fuel injector
Product status: New precision valve assembly, factory completed with calibration and testing for clearance, high-pressure sealing, and fuel injection flow
Packaging: Independent transparent hard protective tube packaging. Valve body ends equipped with plastic protective plugs to isolate the precision oil control end face from transportation impacts and scratches, supporting single-piece and batch purchase for multiple units, and suitable for cross-border small package logistics.
