What happens if a truck does not use urea?
1 Answers
When a truck does not add urea, the nitrogen oxides in the exhaust cannot undergo catalytic reduction, and the released exhaust will have a negative impact on the ecological environment. Below is a detailed introduction to the use of urea in trucks: 1. The primary purpose of using urea in vehicles is to reduce harmful nitrogen oxides in the exhaust into nitrogen and water. 2. The main harmful substances in truck exhaust are nitrogen oxides and particulate matter. While particulate emissions can be reduced through technological means inside the engine, nitrogen oxides remain the primary component of the exhaust. 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. 3. Trucks have a dedicated urea tank, and urea is consumed as long as the vehicle is running. Therefore, it is necessary to replenish urea in a timely manner. Generally, about 4 liters of urea are consumed per 100 liters of diesel. The exact consumption depends on factors such as engine displacement, model, manufacturer, etc. Different road conditions and varying loads can also affect urea consumption.
