Why Do Diesel Vehicles Need to Add Urea?
2 Answers
Diesel vehicles add urea to reduce exhaust emissions and protect the atmospheric environment. Urea is used to convert harmful nitrogen oxides in the exhaust into nitrogen and water. The exhaust emitted by diesel engines is highly polluting to the atmosphere. With increasingly stringent environmental regulations, exhaust treatment systems are required to ensure compliance. The primary harmful substances in diesel exhaust are nitrogen oxides and particulate matter. The exhaust treatment system helps reduce particulate emissions. Once urea is used in the vehicle, it is injected into the exhaust treatment system whenever the engine is running. Under high temperatures, urea decomposes into ammonia gas.
Diesel vehicles need to add urea mainly to treat harmful gases in the exhaust. I'm an experienced driver who has been driving diesel vehicles for over a decade. If you don't add urea, the vehicle's emissions will exceed standards, the dashboard will show a warning light, and even limit the speed, making the drive very uncomfortable. Before every long trip, I always check the urea level and top it up. A canister costs just a few dozen yuan, which saves a lot of hassle. If you don't add it, nitrogen oxides will pollute the air, which is bad for health, and may even damage the exhaust system, leading to high repair costs. After developing this habit, the vehicle runs more smoothly, and the exhaust is much cleaner—a win-win situation. I think all diesel vehicle drivers should pay attention to this and not overlook this small detail.