What are the two methods for CO exhaust treatment?
3 Answers
There are two methods for CO exhaust treatment as follows: Cleaning or replacing the three-way catalytic converter: The function of the three-way catalytic converter is to oxidize CH and CO in the exhaust into CO2 and H2O and reduce NOx to N2, making it crucial for passing exhaust emission tests. During use, the three-way catalytic converter is prone to issues such as carbon buildup blockage, poisoning, or failure, which can reduce or even eliminate its conversion capability, thereby affecting the vehicle's annual inspection results. Carbon buildup blockage is reversible and can be restored through cleaning, whereas poisoning, failure, or damage requires replacement. Cleaning the engine system: If the vehicle has been in use for a long time and the above three components have been inspected without resolving the exhaust emission issue, a deep cleaning of the engine system is necessary. This includes the fuel system, intake pipes, throttle body, etc.
In my experience of car maintenance and modification, there are two main approaches to addressing CO exhaust issues. The three-way catalytic converter is the key device, installed on the exhaust pipe, containing catalysts such as platinum and rhodium. At high temperatures, it oxidizes harmful CO into carbon dioxide and water. Another method involves active optimization by the engine control system, where oxygen sensors continuously monitor exhaust oxygen levels and transmit signals to the ECU to adjust fuel injection, ensuring the air-fuel mixture doesn't become too rich and thereby reducing CO production. Modern vehicles rely on these methods to minimize pollution, but it's essential to regularly check for catalytic converter clogging or sensor failure, as these can cause inspection failures and harm air quality. It's advisable to use high-quality gasoline to prevent catalytic converter poisoning, as this practice extends component lifespan and enhances driving health.
As an experienced driver, I have deep practical insights: CO emission control relies on catalytic converters to transform gases, coupled with combustion optimization to reduce CO at the source. The catalytic converter needs to heat up to work effectively, so avoid high-speed driving immediately after cold starts in winter. Combustion control depends on oxygen sensors and ECU-managed fuel injection; otherwise, overly rich fuel mixtures will increase CO. During maintenance, pay extra attention to the exhaust system for any abnormal noises or black smoke, and schedule regular inspections of these components. This is crucial for environmental protection, helps save fuel, and avoids fines. Simply put, these two major methods ensure clean and safe exhaust emissions.
