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The 4327072 fuel injector is a high-precision electronically controlled common rail component specifically engineered for c-ummins QSL series diesel engines, with full compatibility with QSC8.3, QSL9.3, ISL9.5 and 6C8.3 engines—core models in c-ummins’ medium-duty diesel engine lineup. It features seamless interchangeability with OEM cross reference numbers 4327072, 2897414, 4928421, 4921827, 4307414, fully adhering to c-ummins’ strict quality standards and technical specific-ations for high-pressure common rail systems. As a direct OEM replacement part, it perfectly matches the QSL series’ displacement range and power output, integrating smoothly with the engine’s high-pressure common rail fuel system and optimal structural layout, and it is widely recognized as a reliable replacement for c-ummins ISL Euro IV engine fuel injectors. This injector is a key component for medium-duty engine performance, widely applied in various working scenarios such as commercial vehicles (including Dongfeng), heavy-duty construction machinery, industrial equipment, light-duty mining machinery, agricultural machinery and marine equipment, which are typical applic-ation fields of QSL, QSC8.3, QSL9.3, ISL9.5 and 6C8.3 engines. Functioning as a high-precision electronically controlled solenoid valve, it operates as a normally closed valve—remaining closed without control signals and opening when the ECU sends an injection command, ensuring precise fuel delivery. Capable of withstanding the fuel system’s high-pressure requirement of up to 1600-1800 bar, it ensures stable and efficient fuel delivery even under long-term full-load operation in harsh environments with dust, high humidity, or extreme temperature fluctuations. It responds accurately to signals from the engine’s ECU (Electronic Control Unit) with an ultra-fast response time of <0.1ms, ensuring precise fuel metering (with an error of no more than ±2%) and optimal combustion efficiency, which is critical for meeting strict emission standards such as Euro IV. It boasts high-pressure fuel delivery up to 1800 bar, combined with ultra-fine atomization via precision-machined 0.12mm spray holes and a 2μm plunger clearance—equivalent to 1/50 of a human hair—cooperating with the engine’s cylinder design to ensure uniform fuel-air mixing. This not only reduces exhaust emissions to meet relevant environmental standards but also improves fuel economy and reduces engine noise and vibration. Equipped with advanced multi-stage injection technology (pre-injection, main injection, post-injection), it optimizes the combustion process, enhances idle stability, and significantly extends the engine’s service life. Its enhanced anti-wear and corrosion-resistant design, featuring a precision-ground anti-wear alloy plunger and hardened stainless steel nozzle tip, effectively resists abrasion, corrosion from harsh fuels, and high-pressure impact. Constructed with premium heavy-duty materials through strict screening, including high-strength iron for the body, high-temperature resistant copper solenoid coil, and high-seal O-rings for effective oil-fuel separation and leakage prevention, this injector boasts excellent adaptability to extreme temperatures (-40°C to 180°C) and harsh working conditions, adhering to c-ummins’ strict production standards for reliable performance and longer service life. Every unit undergoes rigorous factory testing, including pressure calibration, flow measurement, spray pattern validation, and leakage checks, and has obtained relevant certific-ations such as ISO 9001, CE, RoHS, and TS 16949, ensuring reliable performance and consistent quality. With a comprehensive set of OEM cross reference numbers, it offers ready-to-ship inventory, customizable neutral carton packaging options, a 6-month warranty, and reliable after-sales support, with delivery available within 3-5 working days via DHL, FedEx, TNT or UPS, making it the ideal choice for maintaining the performance, efficiency, and longevity of c-ummins QSL series engines in various demanding commercial, industrial, agricultural and construction scenarios.

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