What is the purpose of adding urea to a car?
1 Answers
Adding urea to a car primarily serves the function of reducing vehicle pollution and purifying exhaust emissions. The need to add urea applies to diesel-engine vehicles, as diesel engines emit harmful nitrogen oxide compounds that contribute to environmental pollution. Below are the functions of urea and the hazards of not using it: Functions of automotive urea: The role of automotive urea is to convert nitrogen oxides in vehicle exhaust into harmless nitrogen and water, achieving energy savings and environmental protection, enabling the vehicle to meet the national exhaust emission standards. It is generally used in diesel vehicles. Urea has a catalytic function that facilitates a chemical reaction with nitrogen oxide compounds, converting them into non-toxic and harmless nitrogen and water, thereby purifying the exhaust. Compared to agricultural fertilizer urea, automotive urea has higher purity. The SCR (Selective Catalytic Reduction) solution has significant advantages in the exhaust emission treatment systems of National VI diesel vehicles, and automotive urea is an essential additive for the SCR solution. Hazards of not using it: 1. During annual inspections, if the staff discovers that urea has not been added, the vehicle will not only fail the inspection but also face corresponding penalties. 2. Without the circulation of urea solution over time, the injector may become clogged, the urea pump may burn out due to dry operation, and the pipelines may crystallize, ultimately leading to the complete failure of the SCR system. 3. If the ECU detects that the owner has not added urea, it will limit the torque, resulting in insufficient vehicle power.
