What does adding urea in China V mean?

[DeAlyssa]

Adding urea to vehicles is mainly to meet emission standards. Only diesel vehicles require urea addition. The national regulations mandate that electronically controlled diesel engine vehicles must add urea because diesel vehicles have higher exhaust emissions. Adding urea can reduce carbon oxides in the exhaust and lower pollutant emissions, making diesel vehicles more environmentally friendly. Introduction to urea: Urea is used for diesel engines. Since diesel engines emit harmful nitrogen oxide gases during operation, these gases are damaging to the atmosphere and human health. Prolonged exposure to such gases can cause respiratory diseases. To reduce the harm of these gases to the atmosphere and humans, urea is utilized. Balancing particulate emission performance: China V SCR vehicles adjust the injection timing to be more advanced to balance particulate emission performance. If urea is not injected, nitrogen oxide emissions can be even worse than those of China III vehicles.