Dongfeng Xinjiang truck spare parts muffler assembly 1201010-TBM301Y

Built as the core noise control component of the exhaust system, this muffler adopts a multi-chamber resonance and absorption structure optimized via acoustic simulation. It integrates 3 expansion chambers, 2 perforated resonance tubes, and a glass wool absorption layer (density 120kg/㎡), achieving a noise reduction effect of 35dB(A)—reducing engine exhaust noise from 115dB(A) to 80dB(A), which meets GB 7258-2017 automotive noise standards. The structure effectively attenuates low-frequency noise (100-500Hz) that causes driver fatigue, improving comfort during long-haul trips. Even at the engine’s maximum speed (2200rpm), the muffler maintains stable noise reduction performance, avoiding resonance-induced noise amplification

Engineered to endure high-temperature exhaust gases (up to 650℃) and harsh environments in Xinjiang’s mining and plateau areas, the muffler features a robust construction. The outer shell and internal chambers are made of 409L stainless steel with a tensile strength of 510MPa, resisting high-temperature oxidation and thermal fatigue. The internal glass wool is encapsulated in a stainless steel mesh to prevent fiber shedding and contamination. The assembly undergoes a high-temperature powder coating treatment (400℃ curing) on the outer surface, passing 2500-hour neutral salt spray testing (ASTM B117) to resist corrosion in saline-alkali areas. It also resists thermal shock from rapid temperature changes (650℃ to 20℃), ensuring no cracking for ≥300,000km

The muffler is designed with low exhaust back pressure to avoid compromising engine performance. Its internal flow channel uses a streamlined design with smooth transitions between chambers, minimizing exhaust resistance—back pressure is controlled below 3kPa at full engine load, 40% lower than traditional restrictive mufflers. This reduces the engine’s exhaust workload, improving power output by 3-5% and fuel efficiency by 4-6%. The optimized flow path also accelerates exhaust gas discharge, reducing carbon deposition in the exhaust manifold and catalytic converter (if equipped), extending the service life of these components by 30%. Computational fluid dynamics (CFD) simulation confirms stable flow performance across all engine operating conditions

The muffler assembly is engineered for efficient installation and low maintenance, ideal for heavy-duty truck operations in remote areas. It comes with pre-welded brackets and rubber hangers that match the truck’s chassis mounting points, requiring only 4 M16 bolts for fixation—two technicians can complete replacement in 90 minutes, 50% faster than non-OE mufflers. The flange connection uses a heat-resistant graphite gasket (operating temperature ≤800℃) to ensure a leak-proof seal without frequent tightening. The muffler’s structure avoids internal dead corners, minimizing carbon accumulation and eliminating the need for regular cleaning. Backed by a 2-year/250,000km warranty, it provides reliable performance for mining, logistics, and plateau transportation applications