How often does the three-way catalytic cleaning take place? Is three-way catalytic cleaning necessary?

threeYuanCatalysis, as the most important component in the exhaust gas purification system of gasoline vehicles, is responsible for the catalytic reduction of harmful gases such as carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides NOx in the exhaust gas: the three components of CO, HC and NOx The main harmful gases are catalytically reduced into non-toxic and harmless water (H₂O), carbon dioxide (CO2), nitrogen (N2) and oxygen (O2) and discharged.

Is it necessary to clean the three-way catalysis? How often is it appropriate to clean?

Normally, the three-way catalyst can be cleaned once every 40,000-50,000 kilometers, but frequent cleaning may be counterproductive. When the three-way catalysis is used for a long time, there is no lack of carbon deposits in the exhaust gas of vehicles attached to the porous ceramic carrier, and there is a great risk of clogging in the long run. If the three-way catalysis is blocked, it must be cleaned to restore the best redox effect.

Don't be deceived by the 4s shop anymore, the three-way catalytic converter is not washed like this

The mainstream cleaning methods of three-way catalysis are as follows:

1, Additive cleaning:

Additive cleaning is to add a special three-way catalytic cleaning agent to the fuel tank. When the vehicle is started, the cleaning agent will enter the combustion chamber along with the gasoline, and finally be discharged through the exhaust pipe and exhaust gas. The cleaning agent will perform a certain cleaning effect on it.

Advantages of this method: affordable and easy to operate; disadvantages: the cleaning effect is very limited.

2, Bottle cleaning:

Slinging is currently the most mainstream, and it is also a cleaning method strongly promoted by 4S shops and repair shops. In this way, a hose is connected to the engine vacuum tube, and the cleaning agent in the suspension bottle is sucked into the engine by the negative pressure in the hollow tube, and the three-way catalyst is cleaned when it is discharged with the exhaust pipe.

Advantages of this method: easy to use, better cleaning ability; disadvantages: more expensive.

3. Disassembly and cleaning:

Disassembly and cleaning need to completely disassemble the three-way catalyst and soak and clean with oxalic acid. This method has the best cleaning effect, but the operation is troublesome, time-consuming and laborious, and many 4S shops and repair shops are unwilling to provide disassembly and washing services.