Why is urea placed in vehicles?

[LailaDella]

The reasons for placing urea in vehicles are as follows: 1. Reduce carbon oxides: Only diesel vehicles require urea. National regulations mandate that electronically controlled diesel engine vehicles must add urea because diesel vehicles emit higher levels of exhaust gases. Adding urea can reduce carbon oxides in the exhaust, thereby lowering pollutant emissions and making diesel vehicles more environmentally friendly. 2. Catalytic effect: Most diesel engines currently use Selective Catalytic Reduction (SCR) technology. This means that after the engine exhaust is discharged from the turbine, it needs to pass through a catalytic converter before entering the vehicle's exhaust pipe. The urea nozzle on the exhaust pipe sprays urea under the control of the vehicle's computer. 3. Redox reaction: Urea and nitrogen oxides in the vehicle's exhaust undergo a redox reaction in the catalytic converter, ultimately converting the exhaust gases produced by the vehicle into nitrogen and water before being discharged.