Vehicle exhaust is an important source of air pollution. CO, HC and NOx in vehicle exhaust are the most serious substances that pollute the atmosphere. The three-way catalytic converter is the main component of the automobile exhaust gas purification device, which can greatly reduce the pollution degree of the exhaust gas to the atmosphere.inquiry
3 universal catalytic converter refers to a special catalytic device in the exhaust system of the engine, which can oxidize hydrocarbons (HC) and carbon monoxide (CO) in the exhaust gas, and can also oxidize the carbon monoxide (CO) in the exhaust gas. Nitrogen oxides (NOx) are reduced to harmless nitrogen and oxygen.
A three-way catalytic converter is generally composed of four parts: shield, damping layer, honeycomb catalyst substrate and a catalyst coating.
The catalytic converter must have a large enough surface area to ensure that enough exhaust gas is in contact with the active catalytic material (mainly platinum, rhodium, palladium, or rare-earth active material) on the surface of the converter for a long enough time, generally using honeycomb ceramic or Metal catalyst substrate with catalyst coated on the surface.
◆ Maximum coating area.
◆ Minimum back pressure.
◆ Maintain a simple discharge system.
◆ Adapt to the existing system with little hardware change.
◆ Reduced overall volume and catalyst usage.
◆ Passed 80,000km durability test.
◆ Passed European and American emission standards.
◆ Suitable for various types of vehicles.
1. The fuel used in the vehicle must be unleaded clean fuel. Because lead-containing oil is burned, it will greatly reduce the conversion efficiency of the catalyst. Low-quality fuel is also one of the main reasons for the shrinkage, sintering and blockage of the three-way catalytic converter.
2. The use requires that the three-way catalytic converter must be used with the closed-loop electronic fuel injection control engine at the same time. In order to maintain a relatively high conversion efficiency, that is, the theoretical air-fuel ratio of the engine is 14.7:1.
3. Temperature requirements The optimal working temperature of the three-way catalyst is between 500-8500. If the temperature is too low, the conversion efficiency of the three-way catalyst is low. If the temperature is too high, the catalyst will lose its activity and the catalyst carrier will be sintered.