What should I do if the annual inspection of automobile environmental protection fails? What should I do if the three-three-three-way catalytic converter is replaced?

We should find out the reason why the exhaust gas exceeds the standard. Generally speaking, the main reason why the annual inspection of automobile exhaust exceeds the standard is the poisoning of three-way catalyst or the failure of three-way catalyst. But it could also be the throttle. You can clean the throttle.

Throttle is a controllable valve that controls air to enter the engine. There are two kinds of traditional cable and electronic throttle. After the gas enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, which will be burned to do work. It connects the air filter and the engine block, and is called the throat of the automobile engine.

Clean three-way catalyst. Because there are too many impurities such as sulfur, phosphorus, MMT/ manganese and colloid in gasoline in China, these harmful substances gather on the surface of three-way catalytic converter to form chemical complexes, which will lead to the decline of catalytic converter performance, excessive exhaust gas, serious blockage of exhaust pipe and even spontaneous combustion of vehicles.

There are two ways to clean the three-way catalytic converter. One way is to directly remove it and clean it with oxalic acid, which is time-consuming and laborious, and improper operation is easy to cause damage to the catalyst. Another way is a simple cleaning method, commonly known as "infusion bottle", similar to hospital infusion. The cleaning liquid is input into the vacuum tube of the air inlet through a special tool (or medical infusion set) for cleaning. In terms of cleaning effect, cleaning the three-way catalytic converter can effectively reduce exhaust emissions, which can reduce emissions by more than 50% at the highest, and greatly improve the qualified rate of motor vehicle emissions.