What is a Catalytic Converter?
1 Answers
A three-way catalytic converter is the most important external purification device installed in a vehicle's exhaust system. It converts harmful gases in vehicle exhaust, such as CO, HC, and NOx, into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. Essentially, it is a device that transforms these toxic substances into non-toxic, harmless emissions. Common symptoms of catalytic converter failure include: 1. Increased engine fuel consumption: When the catalytic converter begins to clog, it affects the normal operation of the oxygen sensor, leading to inaccurate control of fuel injection, air intake, and ignition, resulting in higher fuel consumption. 2. Reduced vehicle power: When high-pressure exhaust is required, clogging causes poor exhaust flow, which affects air intake, leading to decreased engine power, reduced acceleration, and sluggish performance. 3. Engine stalling and shaking: In cases where the catalytic converter is completely blocked, the inability to expel exhaust gases promptly causes backpressure and reverse flow, leading to engine shaking, stuttering, and eventual stalling. 4. Catalytic converter warning light: This is essentially the engine malfunction indicator light. When engine-related sensors detect abnormal exhaust emissions, they send signals to the ECU, which then alerts the driver via the warning light. 5. Engine noise and foul exhaust odor: A faulty catalytic converter can lead to other engine issues, such as overheating, premature wear, loss of power, unusual noises (e.g., backfiring), and unpleasant exhaust smells. Cleaning cycle for catalytic converters: The condition of the catalytic converter affects engine power, idle stability, and fuel consumption. Its service life under domestic standards is approximately 80,000–100,000 kilometers, while international standards typically range from 160,000–200,000 kilometers. Generally, the catalytic converter should be cleaned every 30,000 kilometers. Of course, if symptoms of failure appear, cleaning can be performed earlier.
