What Does Excessive Emissions Mean?
1 Answers
Introduction to the Causes of Excessive Vehicle Emissions: Vehicle Aging: If the vehicle's mileage has exceeded 450,000 kilometers or it has been in use for more than 15 years, various components of the car will show significant signs of aging, poor contact, poor sealing, and insufficient pressure. Failure of the Three-Way Catalytic Converter: The failure of the three-way catalytic converter is the primary cause of excessive vehicle emissions. The three-way catalytic converter, installed as the most important external purification device in the vehicle's exhaust system, converts harmful gases such as CO, HC, and NOx emitted from the vehicle's exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. When high-temperature exhaust gases pass through the purification device, the catalyst in the three-way catalytic converter enhances the activity of CO, HC, and NOx, promoting specific oxidation-reduction chemical reactions. CO oxidizes at high temperatures into colorless, non-toxic CO2 gas; HC compounds oxidize into water (H2O) and CO2; and NOx reduces into nitrogen and oxygen. These three harmful gases are transformed into harmless gases, thereby purifying the vehicle's exhaust. Abnormal Engine Operation: The engine may experience issues such as misfiring, spark plug oil leakage, or oil blow-by. When the throttle is increased, the engine does not run smoothly and powerfully.
