If a truck operates without urea, its nitrogen oxide emissions can be even worse than those of a National III standard vehicle. Prolonged operation without urea can easily lead to crystallization blockages or high-temperature damage in components such as the urea pump nozzle, pipelines, and the urea pump itself. Repairing these parts can be very expensive. Additionally, without urea, the emission light on the dashboard will illuminate, restricting torque and resulting in insufficient power, making the vehicle feel particularly sluggish. This, in turn, leads to increased fuel consumption. Adding urea helps reduce nitrogen oxides in the exhaust, lowering emission pollution and making the vehicle more environmentally friendly. Most modern diesel engines utilize Selective Catalytic Reduction (SCR) technology. The SCR solution offers significant advantages in National IV diesel vehicle exhaust emission treatment systems, with urea being an essential additive for this system. The principle involves the engine exhaust gases exiting the turbocharger and entering the exhaust pipe, where they pass through a catalytic converter. The urea nozzle on the exhaust pipe, controlled by the computer, sprays a urea aqueous solution. This solution reacts with the nitrogen oxides in the exhaust, ultimately converting the harmful gases into nitrogen and water, which are then released.
