What is Vehicle Urea?
1 Answers
Vehicle urea is primarily used to reduce harmful nitrogen oxides in exhaust gases into nitrogen and water. It is generally used in diesel vehicles. The main harmful substances in diesel vehicle exhaust are nitrogen oxides and particulate matter. While particulate emissions can be reduced through technical means within the engine, the exhaust primarily contains nitrogen oxides. By injecting urea into the exhaust after-treatment device, the urea 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 (Selective Catalytic Reduction) after-treatment system. Below are detailed explanations of related content: 1. Vehicles have a dedicated urea tank where urea is stored. As long as the vehicle is running, urea will be consumed, so it needs to be replenished promptly. Generally, about 4 liters of urea are consumed per 100 liters of diesel, though this varies depending on engine displacement, model, manufacturer, etc. Different road conditions and loads can also affect urea consumption. 2. If diesel exhaust fluid (DEF) is not used, or if its purity is insufficient or its quality is substandard, the vehicle's engine may automatically reduce its speed. Additionally, substandard DEF can contaminate the catalyst in the SCR catalytic reaction tank, leading to serious consequences.