Dongfeng KL truck parts Purification muffler assembly 1201510-T77X0

Built as a key component for reducing exhaust pollutants, this assembly integrates a three-stage purification system to meet strict emission regulations. The primary stage is a diesel oxidation catalyst (DOC) that converts 95% of carbon monoxide (CO) and hydrocarbons (HC) into CO₂ and water. The secondary diesel particulate filter (DPF) captures 99% of particulate matter (PM) with a filtration efficiency of ≥99.5%, while the built-in regeneration system (passive + active) burns off accumulated soot at 550-600℃. A selective catalytic reduction (SCR) catalyst in the tertiary stage reduces nitrogen oxides (NOₓ) by 90% via urea injection, ensuring exhaust emissions meet China VI limits (NOₓ ≤0.08g/kWh, PM ≤0.01g/kWh)

Engineered to minimize exhaust noise, the 1201510-T77X0 assembly adopts a multi-chamber resonance and absorption design for exceptional sound attenuation. It features three expansion chambers and a glass wool sound-absorbing layer (50mm thickness, density 120kg/m³), reducing exhaust noise from 110dB to 75dB—meeting GB 7258-2017 noise standards for heavy-duty trucks. The airflow channel is optimized with smooth curved surfaces to minimize pressure loss (≤3kPa at full load), avoiding power reduction caused by excessive exhaust backpressure. For long-haul drivers, this noise reduction creates a quieter cab environment, reducing fatigue during extended trips and improving overall driving comfort

Optimized to endure the extreme conditions of truck exhaust systems, the purification muffler features a rugged, heat-resistant construction. The outer shell is made of 409L stainless steel (1.5mm thickness) with a high-temperature resistant coating, achieving a melting point of 1450℃ and resisting corrosion from exhaust acids. The internal catalyst substrates (cordierite material) have a thermal shock resistance of 800℃, maintaining structural integrity during rapid temperature changes (e.g., cold starts to full load). The flange connections use high-temperature graphite gaskets (operating temperature up to 800℃) to prevent exhaust leaks, while the mounting brackets are made of Q345B steel with hot-dip galvanization, ensuring stability under vibration (10-500Hz)

This assembly is designed for low maintenance and long-term cost savings for Dongfeng KL fleet operators. The DPF’s passive regeneration system (triggered by exhaust heat during normal operation) reduces active regeneration frequency by 60%, lowering fuel consumption associated with forced regeneration. The 409L stainless steel shell and corrosion-resistant components extend the assembly’s service life to ≥300,000km—twice that of carbon steel mufflers—reducing replacement frequency. By ensuring emission compliance, it avoids fines for non-compliance (up to $1,000 per violation) and prevents engine derating (power reduction by 50%) caused by faulty purification systems. The plug-and-play design cuts installation time to 2 hours (two technicians), lowering labor costs. Backed by a 2-year/200,000km Dongfeng warranty, it provides reliable performance and predictable maintenance expenses