Description
Product Overview
The injector is assembled on the engine cylinder head and receives signals from the electronic control unit to precisely control the timing and amount of high-pressure fuel injection, ensuring complete fuel combustion. Under conditions of long-term high cabin temperature, thousands of bar oil pressure impact, and impurities from diesel washing, the valve core sealing surface may wear, the sealing rubber ring may age, and the electromagnetic valve may have a delayed response. This may result in imbalance in single-cylinder power output, power loss, dilution of engine oil by fuel, and constant illumination of the fault indicator. This product is an integrated finished injector, with standardized dimensions for the outer diameter, return oil interface, and electronic control terminals. The injection curve is uniformly calibrated at the factory, and maintenance and replacement do not require additional debugging. It is suitable for maintenance of medium-sized excavators, loaders, medium-sized freight trucks, and stationary diesel generators.
Core Advantages of the Single Product
Segmented composite oxide valve body, resistant to high temperature and high pressure deformation
The upper section is a mirror-finished precision-machined metal cylinder, combined with the middle section of a high-temperature oxidized brown copper shell structure. The surface is treated for high-temperature oxidation resistance, capable of withstanding long-term cabin high temperature and extremely high oil pressure impact, and is not prone to corrosion and deformation, preventing high-pressure oil leakage from the valve body.
The top single needle is reinforced with an electric control wiring column, ensuring stable signal transmission.
The top single metal conductive wiring column, with a reinforced locking structure, combined with an insulation protection structure, isolates diesel oil, water vapor, and oxidation corrosion, ensuring no delay in the response of the electronic control signal, smooth pre-injection and main injection switching, and elimination of power jolts.
The lateral return oil branch pipe is equipped with a white dust-proof plug, providing full protection of the oil circuit.
The lateral independent low-pressure return oil channel quickly discharges excess reflux fuel, stabilizing the common rail system oil pressure; the end port of the branch pipe is equipped with a white plastic plug, preventing dust and impurities from entering the internal valve core during storage, transportation, and disassembly, avoiding jamming and blockage.
The middle multi-layer ring-shaped sealing component, layer-by-layer isolates gas leakage and seepage
Multiple sealing positions are distributed along the rod body, combined with oil-resistant high-pressure O-rings, layer-by-layer blocking the upward leakage of high-temperature gas in the combustion chamber and the outward leakage of high-pressure fuel, stabilizing the cylinder head sealing environment, and preventing oil dilution faults.
The front end is a high-precision multi-micro-hole injector nozzle, with fully atomized fuel combustion efficiency high
The injector nozzle is made of mirror-finished hard alloy material, with multiple pairs of symmetrical fine spray holes, high-pressure fuel is atomized uniformly and delicately, matching the combustion chamber of medium-sized engines, reducing carbon buildup, lowering exhaust black smoke, and optimizing fuel economy.
The entire machine is completed with a full set of flow calibration at the factory, and after replacement, the power can be quickly restored
The factory completes the detection of high-pressure injection flow, opening pressure, and atomization effect under all working conditions of high and low pressure, and the parameters of the same batch of injectors are highly consistent. After replacement, the idle speed is stable, the power output is linear, and the maintenance and debugging time is significantly reduced. Applicable scenarios
This product is suitable for medium-sized mining excavators, wheeled loaders, medium-sized long-distance freight trucks, and fixed diesel generator sets that are equipped with high-pressure common rail fuel supply systems. It is applicable for the replacement of the injection components of medium-sized electronically controlled common rail diesel engines under conditions of medium-load continuous operation, alternating temperatures in the engine compartment, and dusty and impure diesel environments.
Product Basic Parameters
Product Name: 2645A746 Electronic Control Common Rail Injector Assembly
Part Number: 2645A746
Main Material: Quenched alloy steel valve body, high-temperature oxidized alloy middle section, hard alloy injector nozzle, fluorine rubber sealing ring, insulated electronic control component
Structural Feature: Segmented composite metal valve body, top single-pole electronic control terminal, lateral return oil branch pipe with dust-proof plug, middle multi-layer sealing ring, front end precision atomizing injector nozzle
Application Conditions: Medium-high pressure continuous injection, engine compartment alternating high and low temperatures, vibration and dusty impure diesel environment
Product Status: New and complete injector assembly, factory completed with full set of machine calibration and testing for atomization accuracy, high-pressure sealingity, and electronic control opening and closing response
Packaging: Single independent shock-proof hard cardboard box packaging, injector nozzle and return oil port pre-installed with dust-proof protection plugs, buffer foam to isolate transportation impacts and scratches on the precise spray holes and conductive terminals, supporting single-piece retail, bulk purchase in boxes, and compatibility with cross-border small items and full-box logistics.
