Why is urea added to the car?
2 Answers
Urea is added to the car to meet emission standards. The following are the effects of not using urea in a car: 1. Excessive emissions, causing environmental pollution; 2. Chemicals in the car's system may oxidize, leading to clogging of the urea nozzle and rendering the entire system useless; 3. Reduced vehicle power. Additional information: Below is more about adding urea to a car: 1. Reasons for the urea warning light: 1. Low urea pressure, high urea consumption; 2. Insufficient power, urea consumption too high or too low; dashboard malfunction. 2. Methods to eliminate the urea warning light: 1. Replace the urea solution; 2. Replace the water heating valve; replace the urea pump and power supply module connector. 3. The role of urea is: to treat exhaust gases, reduce pollutants in the exhaust, and optimize engine performance and fuel consumption.
I've been driving a diesel vehicle for several years, and adding urea is mainly to reduce exhaust pollution. Nowadays, automotive emission standards are becoming increasingly stringent, especially with the China VI regulations requiring control of nitrogen oxides, where urea plays a key role. It's a liquid called AdBlue, which is added to a dedicated tank in the vehicle and then injected into the exhaust system. At high temperatures, it reacts with the catalytic converter to convert harmful NOx gases into nitrogen and water vapor, which are then expelled. This makes the vehicle more environmentally friendly and helps it pass annual inspections. If you don't add it, the system will trigger a warning and limit engine power, and prolonged neglect may even damage the DPF. I usually top it up every two to three months, costing just a few dozen yuan per canister, which can last for thousands of kilometers. Once you get into the habit, it feels very worthwhile—protecting the air and keeping things hassle-free.
