What is the Three-Way Catalytic Converter?
2 Answers
The three-way catalytic converter is located at the front end of the engine exhaust pipe, between the front and rear oxygen sensors. Here is some relevant information: 1. Function of the three-way catalytic converter: As the most important component in the exhaust gas purification system of gasoline vehicles, it is responsible for the catalytic reduction of harmful gases in the exhaust, such as carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx). It converts these three main harmful gases into non-toxic and harmless substances: water (H₂O), carbon dioxide (CO₂), nitrogen (N₂), and oxygen (O₂), which are then discharged. 2. Lifespan of the three-way catalytic converter: The condition of the three-way catalytic converter affects the engine's power, idle stability, and fuel consumption. Its lifespan is approximately 80,000–100,000 kilometers for domestic standards, while it is generally 160,000–200,000 kilometers for international standards. Typically, the three-way catalytic converter should be cleaned every 30,000 kilometers. Of course, if any malfunction symptoms appear, cleaning can be performed in advance.
The three-way catalytic converter is that component in the middle of the vehicle's exhaust pipe, specifically designed to treat the dirty substances in the exhaust. I've encountered many cases in auto repair - it's located behind the engine, shaped like a metal box filled with precious metal catalysts. When the engine runs, high-temperature exhaust gases pass through it, converting harmful gases like carbon monoxide, hydrocarbons, and nitrogen oxides into carbon dioxide and water, making the emitted smoke cleaner. If the catalytic converter gets clogged or damaged, the car will feel sluggish, have poor acceleration, increased fuel consumption, and the exhaust pipe may emit black smoke or produce a buzzing sound. Common issues include using low-quality fuel, engine oil leakage into it, or severe carbon buildup. For maintenance, it's recommended to check emission values during annual inspections, avoid frequent short trips to allow the converter to heat up and work more efficiently. Replacement costs around 1,000-2,000 yuan, so early detection of faults can save money. Experienced drivers know that when this part fails, it not only wastes fuel but also causes emission test failures, delaying annual inspections. Regular cleaning with professional tools or highway driving to blow out carbon deposits proves effective.
