Description
Product Overview
The mechanical fuel injector relies on the oil pump to deliver high-pressure fuel to push open the internal needle valve, thereby achieving atomized injection. It has no electromagnetic structure and is controlled by oil pressure to open and close. After long-term operation in mining sites with 24-hour full-load operation, continuous high-pressure fuel flushing, and exposure to poor-quality impure diesel, the sealing surfaces of the needle valve and nozzle become worn, the sealing gasket ages and fails. This may result in imbalance in fuel supply for a single cylinder, reduction in overall engine power, difficulty in cold start, thick black exhaust smoke, and leakage of diesel into the oil pan to dilute the lubricating oil. The valve body, needle valve, and nozzle are precisely matched and ground together. The installation dimensions and opening pressure are standardized. Maintenance can be carried out by directly replacing the entire unit, suitable for heavy-duty freight trucks, large mining excavators, and large-power diesel generators for maintenance and repair.
Core advantages of this product
Segmented quenched and tempered alloy steel valve body, resistant to pressure, wear, and high-temperature deformation
The front section is a black anti-high-temperature shell + the middle section is a metal pressure-bearing sleeve in a split composite structure. The overall quenched and tempered treatment strengthens it, with precise grinding of the inner and outer walls, capable of withstanding extremely high oil pressure for continuous impact. The engine compartment and road bumpy conditions are not prone to deformation or cracking, blocking the internal leakage of high-pressure fuel.
The outer wall is clearly marked with multiple sets of codes for quick identification of the model during inventory and maintenance.
The outer wall of the valve body is marked with multiple sets of part numbers. The characters are resistant to diesel soaking and wiping and do not fall off. When storing and maintaining, it can quickly identify the model to avoid incorrect installation and ensure that the fuel injection pressure matches and the power is sufficient.
The front end has a hard alloy multi-micro-hole nozzle, which fully reduces carbon deposits under heavy load.
The nozzle adopts a hard alloy mirror surface grinding process, with multiple pairs of symmetrical small holes. The high-pressure fuel is atomized evenly and delicately, matching the large-displacement combustion chamber for complete combustion, significantly reducing the accumulation of carbon deposits in the cylinder, exhaust black smoke, and fuel loss.
A thickened copper seal ring is provided as a secondary barrier to prevent gas backflow and leakage.
A thickened copper gasket is separately equipped and assembled between the nozzle and the cylinder head to buffer the high-temperature impact inside the cylinder. It divides and blocks the high-temperature gas in the combustion chamber from backflowing and the outward leakage of high-pressure fuel, stabilizing the fuel supply pressure.
An internal high-precision needle valve pair is provided, with smooth opening and closing without sticking or pressure relief.
The internal needle valve and nozzle are ultra-precisely ground in pairs, and the sealing gap is strictly calibrated. Under high-pressure conditions, they close tightly without fuel reflux and pressure relief, completely solving the problem of pressure leakage in the fuel circuit after engine shutdown and difficulty in secondary startup.
The factory bench set calibration is completed, and no secondary adjustment is required when installing.
Each fuel injector is independently tested for opening pressure, fuel injection volume, and atomization effect. The parameters are unified and standard, and after replacement, the engine can be restored to a stable operating condition, significantly reducing maintenance and debugging time.
Parts list
0432191266 Complete mechanical fuel injector body 1 unit
Thickened copper seal gasket 1 sheet Applicable scenarios
This product is suitable for heavy-duty long-distance freight trucks with mechanical direct injection systems, large mining excavators, heavy-duty wheeled loaders, high-power stationary diesel generators, and heavy-duty diesel engines operating in harsh environments such as 24-hour continuous heavy-duty operations in mines, long-distance freight transportation, high-intensity farming operations, and dusty and contaminated diesel environments with high cabin temperatures and vibrations. It is used for replacing the injection components of heavy-duty diesel engines in these types of machinery.
Product Basic Parameters
Product Name: 0432191266 Mechanical Injector Assembly
Part Number: 0432191266
Main Material: Tempered and hardened alloy steel valve body, tungsten carbide needle valve nozzle, copper sealing gasket, oil-resistant built-in sealing component
Structural Feature: Segmented black and gray composite valve body, external wall engraved identification code, front-end precision atomizing nozzle, matching copper sealing gasket
Application Conditions: Ultra-high pressure reciprocating injection, continuous high-temperature vibration in the cabin, heavy-duty diesel engine corrosion by impurities
Product Status: New and complete injector assembly, factory completed with all sets of bench tests for atomization accuracy, high-pressure sealing, and opening pressure
Packaging: Single independent shock-proof hard tube packaging, nozzle ends equipped with transparent plastic dust protection covers, foam buffer protection to avoid scratches and damages to the precise needle valve during transportation, supports single-piece retail, bulk purchase in cases, and is compatible with cross-border small items and full-case logistics.
