What is the function of special urea for diesel vehicles?
2 Answers
The function of special urea for diesel vehicles is to reduce nitrogen oxides in vehicle exhaust, lower emission pollution, and improve the environmental friendliness of the vehicle. Urea solution is mainly used in cars, trucks, buses, and heavy-duty non-road diesel engine vehicles equipped with SCR exhaust treatment systems. It can purify vehicle exhaust, reduce nitrogen oxide emissions in the exhaust, while optimizing engine performance and reducing fuel consumption. The harmful substances in diesel vehicle exhaust are mainly nitrogen oxides and particulates. Technical measures can be applied within the engine to reduce particulate emissions, leaving mainly nitrogen oxides in the exhaust. Urea is injected into the exhaust after-treatment device, where it decomposes into ammonia at high temperatures. Under the action of a catalyst, the ammonia reacts with nitrogen oxides to produce harmless nitrogen and water. This device is called the SCR after-treatment system.
I've been driving diesel vehicles for over a decade. Diesel exhaust fluid (DEF) is primarily used to treat exhaust pollution. It works in conjunction with the vehicle's SCR system to convert harmful nitrogen oxides into water and nitrogen, causing minimal environmental damage. In the past when DEF wasn't used, vehicles emitted thick black smoke and the air was heavily polluted. Now with DEF, the emissions feel much cleaner while driving, reducing environmental pollution and avoiding fines. If you don't add DEF, the dashboard will show a warning light, the vehicle will enter limp mode with speed restrictions, and it may even clog the catalytic system - leading to expensive repairs. I recommend fellow drivers to refill it regularly, checking the fluid level every two to three months. You can easily buy bottled DEF at gas stations and refill it yourself - it's convenient and cost-effective. From a practical perspective, this small modification brings significant benefits.
