Dongfeng Cummins ISZ14 engine spare parts fuel injector C5571980

Built as a core component for ISZ14’s performance, this fuel injector adopts piezoelectric actuation technology to deliver ultra-precise fuel control. It achieves an injection quantity accuracy of ±1% and a minimum injection volume of 0.5mm³, enabling multi-stage injection (pilot, main, post-injection) to optimize combustion. At 1600 bar injection pressure, the 8-hole nozzle (0.12mm orifice diameter) atomizes fuel into 5μm droplets—ensuring 98% combustion efficiency, which boosts engine power output by 5% and reduces fuel consumption by 7-9% compared to aging injectors. The piezoelectric actuator’s response time of ≤0.1ms adjusts injection timing in real-time, matching load changes to avoid unburned fuel and minimize hydrocarbon emissions (≤0.1g/kWh)

Engineered to endure the extreme conditions of ISZ14’s combustion chamber, the injector features a durable, high-pressure-resistant structure. The nozzle body is made of heat-treated H13 tool steel (hardness HRC58-62), resisting erosion from high-pressure fuel and thermal fatigue (operating temperature up to 350℃). The fuel control valve uses a tungsten carbide valve seat with a surface finish of Ra ≤0.02μm, ensuring leak-proof performance even at 1600 bar. The injector’s housing is made of 42CrMo alloy steel, with a nitrided surface layer (0.5mm thickness) that enhances wear resistance. Finite element analysis confirms it withstands 100 million injection cycles (equivalent to 1.2 million km) without structural failure, matching the engine’s service life

Designed to support the ISZ14 engine’s National VI emission compliance, the injector integrates advanced combustion control features. Post-injection (2-3ms delay after main injection) reduces NOx emissions by 30% by regenerating the SCR system, while pilot injection (pre-injection of 10% fuel volume) lowers combustion noise by 15dB. The injector maintains stable performance across extreme environments: it operates normally at -40℃ (northeast China winters) with a built-in heater that thaws diesel wax, and at 50℃ ambient temperature (Xinjiang deserts) without injection pressure loss. It is compatible with low-sulfur diesel (≤10ppm), resisting fuel system corrosion and ensuring consistent performance in regions with strict fuel quality requirements

Optimized for efficient fleet maintenance, the fuel injector features a user-friendly plug-and-play design. The 12-pin connector plugs directly into the engine wiring harness, and the injector secures to the cylinder head via a M14×1.5 mounting bolt (torque 55-60N·m)—no specialized tools needed. A single technician can replace one injector in 30 minutes, 40% faster than non-OE units. The injector undergoes 100% factory testing (injection quantity, atomization, leak tightness) and comes pre-calibrated with a unique QR code—scanning it links to Cummins’ diagnostic system for ECU parameter matching. With a service life of ≥150,000km and a 1-year warranty, it minimizes maintenance frequency. The injector’s high-precision design also reduces carbon deposit formation, eliminating the need for regular cleaning and lowering long-term operational costs