What is the purpose of adding urea to trucks?

[DelRachel]

Truck adding automotive urea can catalyze the reduction of nitrogen oxides in the exhaust gas into harmless nitrogen and water in the selective catalytic reduction system of diesel vehicle exhaust. The following are the specific impacts of not adding urea: 1. Unable to pass annual inspection: If the staff finds that no urea has been added during the annual inspection, not only will the inspection fail, but corresponding penalties will also be imposed. 2. Excessive emissions: The exhaust emissions do not meet the standards, polluting the environment. 3. SCR system scrapped: Long-term absence of urea solution circulation will cause nozzle clogging, dry burning damage to the urea pump, pipeline crystallization, etc., eventually leading to the scrapping of the entire SCR system. 4. Power reduction: When the ECU detects that the owner has not added urea, it will limit the torque, making the vehicle lose power.