What is the purpose of adding urea to large buses?

[OwenFitz]

The role of adding urea to large buses is as follows: 1. Urea is used for diesel engines because they emit nitrogen oxide pollutants during operation. To reduce the harm of these gases to the atmosphere and humans, urea is employed. When urea encounters nitrogen oxides emitted by diesel engines, 2. it converts them into nitrogen and water, both of which are harmless to the atmosphere and human health. Below is additional information about automotive urea: 1. In vehicles, it primarily serves to purify exhaust gases by reacting with nitrogen oxides in the exhaust to reduce their emissions. With increasingly stringent emission testing for heavy-duty trucks and buses, failure to use automotive urea results in non-compliance. 2. Automotive urea also optimizes engine performance and fuel consumption, reducing diesel consumption by up to 5-7%. 3. Urea is added to treat NOx (nitrogen oxides). Without urea, exhaust emissions cannot meet standards. 4. It is used in cars, trucks, buses, and heavy-duty non-road diesel engine vehicles equipped with SCR systems to purify exhaust gases, reduce nitrogen oxide emissions, optimize engine performance and fuel consumption, and cut diesel consumption by up to 6%, significantly lowering costs.

[KeiraMarie]

Adding urea to large buses is mainly to reduce exhaust pollution. Modern diesel vehicles emit excessive nitrogen oxides, which can affect air quality and even cause diseases. I often pay attention to environmental issues. After adding urea, it acts like a "cleaner" to neutralize harmful gases, converting them into harmless water and nitrogen. This system is called SCR, and many local regulations require its use; otherwise, the vehicle may face fines or driving restrictions. In the long run, protecting the environment means protecting health, benefiting everyone. Don’t forget to regularly check the urea level to avoid system failures that could limit engine power and affect safety. Simple maintenance can keep the air clean and make driving on the road more reassuring.

[Sophie]

I discovered that the role of urea in automobiles is to reduce harmful emissions through chemical reactions. The specific principle is that the urea solution is sprayed into the exhaust pipe, where it decomposes into ammonia under high temperatures, which then combines with nitrogen oxides to form non-polluting substances. This makes the exhaust much cleaner, reducing problems like acid rain and smog. Through my experience with cars, I found that after adding urea, the engine runs more smoothly without sudden error reports, and fuel consumption doesn’t increase much. Nowadays, large buses are all equipped with this system as standard, making daily use convenient. However, it’s important to use genuine products to avoid blockages from counterfeit ones. Before each trip, check the urea tank to prevent the vehicle from 'striking' due to a lack of fluid. Once you develop this habit, driving becomes stress-free, and the environment benefits as well.

[EvaAnn]

As a frequent driver, I'm telling you that not adding urea will cause engine problems. If the urea tank is empty, the system automatically reduces power, making it hard to gain speed, resulting in high repair costs and potential fines. Environmental laws are strict—excessive nitrogen oxides damage the catalyst, and replacement is very expensive. When I drive long distances, I need to refill every five to six thousand kilometers. If the level is too low, the dashboard alarm goes off, which can easily lead to accidents. I remind everyone to use standard urea solution to avoid trouble—it's actually low-cost and makes maintenance easier.