
Main function of the muffler
- Noise reduction: Vehicle engines produce intense exhaust noise during operation. Catalytic mufflers use special acoustic structures, such as expansion chambers, resonating chambers, and perforated tubes, to buffer and interfere with the exhaust airflow, reducing the exhaust flow rate and pressure fluctuations, thereby reducing noise generation and making vehicle operation quieter.
- Exhaust purification: In addition to noise reduction, catalytic mufflers also purify exhaust gases. They usually have a catalyst coating inside. When high-temperature exhaust gases from the engine pass through the catalytic muffler, the catalyst promotes chemical reactions of harmful gases such as carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx) in the exhaust gas, converting them into harmless or less harmful substances such as carbon dioxide (CO₂), water (H₂O), and nitrogen (N₂), reducing environmental pollution.
Key Words

Silencer
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