Which vehicles use urea?
2 Answers
Diesel vehicles use urea, which refers to the diesel engine exhaust treatment fluid. It is a liquid used with SCR technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. To meet annual inspection emission standards, diesel vehicles need to install an SCR system in their exhaust treatment, and urea solution is used in the SCR system to treat nitrogen oxides in the exhaust. The impacts of not using urea in vehicles are: 1. Excessive emissions, causing environmental pollution; 2. Chemicals in the vehicle system may oxidize, the urea nozzle may become blocked, rendering the entire system useless; 3. Decreased vehicle power. The role of urea is: to treat exhaust and reduce pollutants in the exhaust, optimize engine performance and fuel consumption.
As a veteran diesel truck driver with over a decade of experience, I can tell you that urea is primarily used in vehicles with diesel engines, like the common 18-wheel long-haul trucks, city transit buses, and even some luxury SUVs such as the diesel version of the Audi Q7. These vehicles are equipped with a system called SCR (Selective Catalytic Reduction), where the urea solution is added to reduce harmful emissions. I remember the first time I drove without paying attention to the urea level—the system immediately triggered an alarm and limited the speed, almost causing a serious delay. When refueling, don’t just focus on the diesel; you also need to regularly top up the urea in its dedicated tank to keep it clean and prevent nozzle clogging. Modern diesel technology has improved significantly, and using urea not only helps save fuel but also extends the driving range, which is especially crucial for high-speed driving in complex road conditions.
