Dongfeng LoongGine Engine part Intake connection pipe 1119021-E9C01

Engineered to maximize intake airflow efficiency, this connection pipe features a smooth, seamless internal bore with a precision-machined finish (surface roughness Ra ≤0.8 μm). The aerodynamic design eliminates sharp bends, ridges, or internal protrusions that cause airflow turbulence—reducing air resistance by 15-20% compared to generic intake pipes with irregular inner surfaces. Computational Fluid Dynamics (CFD) testing confirms the pipe maintains a uniform airflow velocity (30-40 m/s at rated engine speed) from the air filter to the intake manifold, ensuring consistent air delivery to each cylinder. This optimized airflow enhances the engine’s air-fuel mixing ratio, improving combustion efficiency by 3-5%, boosting maximum power output by 2-3%, and reducing fuel consumption under heavy-load conditions (e.g., long-haul transportation, construction site operations)

The 1119021-E9C01 intake connection pipe is constructed from high-grade glass fiber-reinforced nylon (PA66+30% GF), a material selected for its exceptional mechanical strength, heat resistance, and chemical stability. This composite material withstands continuous operating temperatures up to 120°C (common in engine bay environments near the exhaust manifold) and intermittent temperatures up to 150°C without deformation or material degradation. It also exhibits high impact resistance (Izod notched impact strength ≥50 kJ/m² at 23°C), preventing cracking from accidental impacts during maintenance or engine vibration (up to 50 Hz). Additionally, the material is resistant to oil mist, fuel vapors, and engine coolants—avoiding swelling, discoloration, or structural weakening from long-term exposure to these contaminants, ensuring a service life of 100,000+ kilometers under normal use

To maintain the integrity of the engine’s intake system (critical for preventing unfiltered air from entering the combustion chamber), the pipe integrates a dual-seal system at both end flanges. Each flange is equipped with a pre-installed nitrile rubber (NBR) O-ring (or optional fluoroelastomer/FKM O-ring for high-temperature applications) that creates a tight, compression-based seal against the air filter housing and intake manifold. The O-rings are designed with a trapezoidal cross-section to maximize contact area and ensure uniform pressure distribution when the flange bolts are tightened to the OEM-specified torque (25-30 N·m). Additionally, the flange mating surfaces are precision-ground to a flatness tolerance of ≤0.1 mm, eliminating micro-gaps that could allow unfiltered air (containing dust, dirt, or debris) to bypass the air filter—preventing premature wear of piston rings, cylinder liners, and valves

Designed for user convenience, the 1119021-E9C01 intake connection pipe supports straightforward, low-maintenance installation that aligns with Dongfeng LoongGine’s original engine layout. The pipe’s flanges feature molded alignment pins that mate with corresponding holes in the air filter housing and intake manifold, ensuring quick, tool-free positioning during assembly—reducing installation time by 40% compared to generic pipes without alignment features. The flange bolt holes are pre-threaded (or compatible with standard M8/M10 bolts, depending on engine model) and marked with torque indicators, guiding mechanics to apply the correct tightening force without specialized tools. For long-term maintenance, the pipe requires no periodic inspection or cleaning beyond routine air filter replacements; its smooth external surface resists dust buildup, and the durable composite material is easy to wipe clean with a dry cloth. The part is laser-marked with the part number, material grade, and manufacturing date for easy identification and traceability, simplifying inventory management for fleet workshops