Dongfeng Renault Engine parts Fuel injector assembly D5010224535

The D5010224535 assembly features a precision-machined injector nozzle with ultra-fine spray holes (typically 6-8 holes, each 0.15-0.2mm in diameter) and a high-response solenoid valve. This design enables it to atomize fuel into micron-sized droplets (5-10 μm) with uniform distribution, ensuring complete combustion in the engine’s cylinders. The optimized spray pattern (tailored to Dongfeng Renault’s combustion chamber geometry) minimizes unburned fuel, reducing fuel consumption by up to 3-5% compared to worn or low-quality injectors. Additionally, the fast-acting solenoid valve supports precise fuel injection timing (controlled by the ECU), adapting to dynamic engine loads (e.g., acceleration, heavy hauling) to maintain optimal power while lowering exhaust emissions (e.g., NOx, particulate matter)

Crafted from high-performance materials to withstand the extreme conditions of diesel fuel systems, the injector assembly delivers exceptional durability. The nozzle tip is made of heat-resistant stainless steel (e.g., 17-4 PH) with a wear-resistant coating (such as chromium nitride), protecting against corrosion from low-sulfur diesel fuel and erosion from high-pressure fuel flow (up to 2,500 bar, the operating pressure of Dongfeng Renault’s common rail systems). The solenoid valve core uses high-grade magnetic alloy to ensure consistent electrical response over time, while the injector body is constructed from forged aluminum alloy for lightweight strength and effective heat dissipation. This material selection ensures a service life of 300,000+ km under normal maintenance, avoiding premature failures caused by fuel contamination or thermal stress

Every D5010224535 fuel injector undergoes rigorous factory calibration to match Dongfeng Renault’s strict performance standards. Using specialized test benches, each injector is calibrated for fuel flow rate (e.g., 180-220 cc/min at rated pressure), spray angle (typically 15-20 degrees), and leakage rate (less than 0.1 cc/min under pressure). This ensures that all injectors in an engine operate uniformly, preventing issues like cylinder-to-cylinder power imbalance, rough idling, or excessive exhaust smoke. The calibration data is also stored in the injector’s internal memory (where applicable), allowing the ECU to recognize and optimize its performance—ensuring consistent fuel delivery even as the engine ages. Post-calibration, each injector is sealed with a Dongfeng Renault quality label to confirm compliance with OEM specifications

The assembly incorporates multiple sealing technologies to ensure leak-proof operation and long-term reliability. The fuel inlet connection features a high-temperature resistant O-ring (made of fluororubber, operating range: -40°C to 200°C) that creates a tight seal with the fuel rail, preventing fuel leakage under high pressure. The injector body’s mating surface with the cylinder head is precision-machined to a smooth finish (Ra 0.4 μm or lower) and paired with a copper crush washer, ensuring a secure seal that withstands thermal expansion and contraction. Additionally, the internal fuel passages are honed to remove burrs, preventing fuel flow restrictions or debris buildup that could clog the nozzle. These design features eliminate common injector-related issues (e.g., fuel leaks, nozzle clogging) and ensure stable performance in harsh operating environments (e.g., dusty construction sites, long-haul high-temperature routes)