What is the use of urea in a car? Why do you add urea to the car?

Since our domestic vehicles are mainly gasoline vehicles, and diesel vehicles are mostly large trucks and trucks, many people know very little about vehicle urea. So, what is the use of car urea? Why add urea to diesel vehicles?

What is the use of car urea?

Vehicle urea can catalytically reduce nitrogen oxides (NOx) in exhaust gas into harmless nitrogen (N2) and water (H₂O) in the selective catalytic reduction (SCR) system of diesel vehicle exhaust.

Why add urea to diesel vehicles?

1. Unlike gasoline engines, the exhaust pollution of diesel engines is mainly composed of NOx and carbon particles (carbon particles are generally filtered by a particulate trap installed in the exhaust system).

2. Among them, the NOx of diesel engine exhaust is mainly nitric oxide (NO). If the NO concentration is too high, it will affect the body's chest and lung functions, causing central nervous system disorders and other hazards. At the same time, it will slowly convert into nitrogen dioxide (NO2) in the air. NO2 has a strong pungent odor. Inhalation can cause diseases of the human respiratory system. At the same time, it is also one of the main causes of acid rain.

3. It is extremely harmful to people and the environment. Therefore, in the National Fourth Standards implemented in my country in 2008, it is stipulated that automotive urea must be used in the emission reduction system of diesel vehicles.

Consequences of not adding urea to diesel vehicles

① During the annual inspection, if the staff isdiscoverFailure to add urea will not only fail the trial, but will also face corresponding penalties.

② Exhaust gas emission is not up to standard, polluting the environment, harming the environment of future generations, and becoming a sinner through the ages.

③ If there is no circulation of urea solution for a long time, the nozzle will be blocked, the urea pump will be damaged by dry burning, the pipeline will crystallize, etc., and finally the entire SCR system will be scrapped.

④ The ECU detects that the owner has not added urea, which will limit the torque and the car will not be able to perform well. For this reason, some car owners will brush the program to avoid restrictions, and this approach will also become a sinner through the ages.