Routine maintenance:

1. Diesel and urea solutions produced by regular manufacturers must be added. Excessive impurities and other component problems may damage the catalytic converter;

2. Regularly replace the urea filter element. The air-driven urea pump and air-assisted urea pump also need to regularly replace the air filter element;

3. Impurity sediments and crystals are easy to accumulate inside the urea tank, so it must be cleaned regularly. , at the same time, pay attention to cleaning the outside of the urea tank, especially around the tank lid, and do not let stolen goods fall into the tank when filling urea;

4. Urea nozzles, pipelines, etc. may also be blocked by crystals , it is recommended that users go to the service station for inspection and maintenance according to the manufacturer's recommended maintenance intervals.

Extended information

The purity of vehicle urea solution is an important indicator to distinguish the quality of urea solution. Although the vehicle urea solution looks like a transparent liquid, it contains a lot of insoluble substances, such as biuret, triuret, etc. If the content of these colloidal substances is too high, cyanuric acid crystals will occur.

In a stable state, the urea solution will crystallize when the water evaporates. Therefore, as long as the urea tank cover is tightly sealed, the urea in the tank will crystallize very slowly. Secondly, a small amount of crystallization in the tank will not be a big problem. Because the urea filter element can filter out impurities.

When the accelerator is not stepped on, the engine speed is low, and the exhaust temperature is low, urea will not be injected into the exhaust pipe, so there is no need to worry about stalling at idle speed. The urea does not have time to react and accumulates in the exhaust pipe. If the engine is shut down suddenly and the engine is turned off, urea may accumulate in the exhaust pipe.

Baidu Encyclopedia - Urea solution for vehicles