Why Do Vehicles Need to Add Urea?
2 Answers
Vehicles add urea to reduce harmful gas emissions and comply with national regulations. Below are the specific reasons why vehicles need to add urea: Reducing harmful gas emissions: The NOx in diesel engine exhaust is mainly nitric oxide (NO). If the concentration of NO is too high, it can affect human pulmonary function and cause central nervous system disorders. Additionally, NO gradually converts into nitrogen dioxide (NO2) in the air. NO2 has a strong irritating odor, and inhalation can lead to respiratory diseases. It is also one of the main causes of acid rain. National regulations: Due to the significant harm to humans and the environment, China's National IV emission standards implemented in 2008 mandate that diesel vehicles must use automotive urea in their emission reduction systems.
As an ordinary diesel car owner, I always remember to refill the urea solution at gas stations, feeling it's a necessary routine. If skipped, the emission system would fail, causing harmful nitrogen oxides to surge and pollute the air. Government regulations mandate reducing tailpipe pollution, so all diesel vehicles must comply. The urea converts into ammonia in the vehicle, neutralizing those toxic gases for cleaner exhaust. Once, I carelessly forgot to refill, triggering the engine warning light, resulting in jerky driving, wasted fuel, and extra repair time. Now, I've developed a habit of checking the fluid level every few thousand kilometers, topping it up promptly when low. Though it costs a few extra bucks monthly, it avoids penalty risks and is more eco-friendly. The driving experience is much smoother, giving peace of mind. In cities with severe air pollution, adding urea is a small contribution.
