Why Do Diesel Vehicles Need to Add Urea?

[MacRiver]

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.

[ClaytonLynn]

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.

[OTucker]

I'm interested in automotive mechanics. Adding urea to diesel vehicles is a crucial part of the SCR system, which converts nitrogen oxides in the exhaust into harmless water and nitrogen. Without urea, the chemical reaction lacks raw materials, not only causing the system to fail but also potentially leading to engine overheating or damage. The principle is that urea is injected into the catalytic converter, where it decomposes into ammonia to neutralize pollutants. Simply doing this can slightly reduce fuel consumption and make a significant contribution to the environment. I recommend learning some basic knowledge and ensuring not to overfill or mix impurities when adding urea. It's cost-effective and helps avoid malfunctions.

[Angel]

To reduce air pollution, diesel vehicles must use urea. It helps clean nitrogen oxides from the exhaust, which are harmful pollutants causing smog and respiratory issues. As someone who cares about the environment, I feel like I'm contributing to eco-protection every time I refill the urea. It's affordable and easy to operate—just a two-minute job to replace the tank fluid. The direct consequence of not using it is exceeding emission standards, possibly leading to fines. Considering the cleaner air in our cities, this minor maintenance is totally worth it. Let's all take action!