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Common Rail Diesel Fuel Injector 4903455 for Cu-mmins Scania Engine Qsx15 Isx15
| MOQ: | 1 pieces |
| Price: | US $265.32-285.32 |
| Payment Method: | L/C,D/A,D/P,T/T,Western Union |
| OE No. | 4903455 |
| Type | Fuel Injector |
| Car Make | Diesel Car |
| Packing | Neutral Packing or Customize Packing |
| Warranty | 1 Year |
| MOQ | 1PC |
<Product Description> This high-pressure electronically controlled nozzle unit (standard part number: 4903455, common cross-references and interchangeable numbers include 4903455PX, 4088665, 4902827, etc.) is precision-engineered for heavy-duty, large-displacement diesel power platforms (such as the ISX15 and QSX15 series high-power engines). As the core control and execution component of the fuel supply and combustion control system, it bears the heavy responsibility of precisely metering and atomizing high-pressure diesel fuel into ultra-fine particles within microseconds. It is widely used in long-haul trucks, large-tonnage engineering dump trucks, special excavation equipment, and backup diesel generator sets.
Adhering to the R&D standard of "ultra-fine particle high-pressure injection, millisecond-level precise response," the internal needle valve assembly and armature valve core are both subjected to ultra-high precision grinding and ultra-low friction polishing. The surface is covered with a high-density anti-coking hardened coating, which can effectively resist early erosion caused by impurities in inferior diesel fuel. After the equipment is upgraded, drivers and machine operators will experience noticeable performance improvements: cold starts are quick and smooth, and the severe shaking and vibration at low idling speeds are completely eliminated; under heavy loads climbing steep slopes or high-intensity continuous tunneling conditions, the accelerator pedal feedback is crisp and smooth, providing a continuous and stable supply of power, while significantly reducing exhaust smoke and resulting in superior fuel economy for the vehicle and machinery.
Advantages: Direct supply from our self-operated modern production base.
Problems Solved: Traditional OEM procurement models involve complex processes that can lead to excessive tolerances in parts, uneven fuel supply to cylinders, and high-pressure leaks, while also significantly increasing procurement costs.
Value Brought: Our self-built standardized production base implements precision manufacturing throughout the entire process, eliminating layers of intermediaries and ensuring consistent injection height across cylinders. This reduces maintenance costs and provides a robust and reliable power guarantee for the long-term operation of the equipment.
Advantages: 100% fully simulated digital bench rigorous quality inspection.
Promotional Features: Problems Solved: Addressing quality issues such as delayed solenoid valve response, internal pressure leakage, and needle valve jamming common with low-quality parts, leading to unstable power after installation and wasted time and money on repeated disassembly and debugging.
Value Brought: Each injector undergoes fully automated testing before leaving the factory. Under simulated high temperature and ultra-high pressure conditions, the injection volume and return oil sealing are precisely calibrated for different pressure ranges, ensuring immediate usability after installation and significantly saving time and costs associated with equipment disassembly and debugging.
Advantages: A large, readily available inventory and rapid warehousing and distribution.
Problems Solved: Addressing the costly delays and lost work time caused by fuel system failures affecting commercial vehicles and construction machinery, resulting in downtime and material shortages.
Value Brought: The warehousing center maintains a sufficient stock of best-selling specifications year-round. Orders are responded to quickly, with priority packing and shipping within 24-48 hours, significantly shortening the logistics and delivery cycle. This helps fleets and owners quickly restore equipment availability and effectively avoids downtime losses.
Advantages: Made of special hardened alloy wear-resistant and corrosion-resistant material.
Problem Solved: Addressing the issue of premature wear and valve core seizure caused by variations in diesel lubricity and sulfur content across different regions.
Benefits: The core valve assembly utilizes high-strength special bearing steel and undergoes a surface anti-corrosion hardening treatment, significantly improving fatigue resistance and wear resistance. It maintains stable performance even under harsh environments and prolonged high-load operation, avoiding the additional costs associated with frequent disassembly and repairs.
</Product Advantages>
| Parameter Name | Parameter Value |
|---|---|
| Product Name | Heavy-Duty Diesel Engine High-Pressure Electronic Common Rail Injector |
| Standard OE Part Number | 4903455 |
| Common Interchange Numbers | 4903455PX / 4088665 / 4902827 |
| Applicable Engine Models | ISX15 / QSX15 Series Heavy-Duty Diesel Engines |
| Fuel Supply System | High-Pressure Electronic Common Rail/Unit Injection System |
| Core Valve Core Material | Aerospace-Grade Quenched Bearing Steel, Corrosion-Resistant High-Hardness Special Alloy Steel |
| Needle Valve Coating Process | High-Density Ultra-Wear-Resistant DLC Hardened Coating |
| Nozzle Machining Technology | EDM High-Precision Electrical Discharge Micro-Needle Machining |
| Operating Temperature Range | -40°C to +125°C |
| Internal Sealing Components | Original Equipment Manufacturer (OEM) High-Temperature Resistant and Anti-Swelling Special Fluororubber (FKM O-Rings) |
| Net Weight per Unit | Approx. 0.91 kg / piece |
| Testing Standard | 100% Automated Bench Flow and Pressure Testing |
</Parameter Table>
<Application Scenarios> Long-Distance Logistics and Mountainous Steep Slope Climbing: In cross-regional logistics transportation, trucks fully loaded with heavy cargo face long-term high-speed cruising and continuous steep slope climbing. By replacing their fuel injectors with this high-pressure injector, drivers can clearly feel that the vehicle's upshifts are crisper, the power output is full and does not diminish when the accelerator is pressed, and the diesel fuel is fully combusted, improving climbing torque while effectively reducing overall fuel consumption.
Construction Engineering and Continuous Operation of Large Heavy-Duty Machinery: In construction sites with high dust and harsh terrain, heavy equipment frequently operates under heavy loads. This injector, with its microsecond-level electronic control response and ultra-high-pressure atomization capability, ensures that the engine can still output continuous high torque even when facing sudden fluctuations in engine speed. The combined action is smooth and continuous, completely avoiding engine stalling and misfires, ensuring efficient progress in construction.
