Dongfeng LoongGine engine parts fuel injection pump assembly 1111BF11-010

Built as the core of the engine’s fuel supply system, this injection pump features an electronically controlled common-rail design to deliver ultra-precise fuel injection. Equipped with a high-response solenoid valve (response time ≤0.1ms), it adjusts fuel injection quantity (0.5-20mm³/stroke) and timing (0-60° CA) in real-time based on engine load and speed signals. The 1800bar high injection pressure atomizes fuel into 5-10μm droplets, increasing fuel-air mixing efficiency by 40% and improving combustion completeness. For the DD11 engine, this translates to a 6-8% reduction in fuel consumption (saving 2-3L/100km for long-haul trucks) and a 5% boost in power output, while minimizing unburned fuel emissions

Engineered to endure the extreme pressure and mechanical stress of heavy-duty operation, the pump features a rugged construction. The pump body is precision-cast from A380 aluminum alloy with internal reinforcement ribs, resisting deformation under 1800bar injection pressure. The plunger and barrel assembly—critical for pressure generation—are made of high-carbon chromium bearing steel (SUJ2) with a surface hardness of HRC 60-65, ensuring wear resistance and a service life of ≥300,000km. A dual-layer oil seal (nitrile rubber + PTFE) prevents fuel leakage and protects internal components from dust and moisture, with a leakage rate tested to ≤0.01mL/h

Designed to adapt to diverse operating conditions—from cold plateaus to hot deserts—the injection pump exhibits exceptional environmental resistance. The pump’s internal components are coated with a wear-resistant and corrosion-resistant ceramic film (CrN), resisting degradation from low-quality diesel fuel and sulfur-containing additives. The solenoid valve operates stably at temperatures ranging from -40℃ to 120℃, ensuring reliable cold starts in frigid regions and consistent performance in high-temperature engine compartments. The pump body’s electrophoretic coating (80μm thickness) passes 1500-hour neutral salt spray testing (ASTM B117), preventing rust in coastal or saline-alkali environments

The injection pump is engineered to ensure Dongfeng LoongGine engines meet strict emission standards, including China’s National VI and Euro VI. Its precise injection control minimizes NOx and particulate matter (PM) emissions by 90% and 95% respectively, supporting the SCR and DPF aftertreatment systems. Maintenance is simplified by the pump’s modular design—key components like the solenoid valve and pressure sensor can be replaced individually, reducing repair costs by 40% compared to full pump replacement. The pump’s built-in self-diagnostic function communicates with the engine ECU, providing real-time fault codes to minimize troubleshooting time. Backed by a 2-year/250,000km warranty, it offers long-term reliability and cost-effectiveness for fleet operators