What is the formula for automotive urea?

1 Answers
DelFinn
07/29/25 4:11pm
Automotive urea formula is: composed of 32.5% high-purity urea and 67.5% ultra-pure water. Automotive urea needs to be replenished approximately every 2,000 kilometers, with 3 to 5 liters of urea used per 100 liters of diesel. The usage amount of urea is equivalent to 3% to 5% of the fuel consumption. The reason for adding automotive urea is: the harmful substances in diesel vehicle exhaust are mainly nitrogen oxides and particulates. While particulate emissions can be reduced through technical means inside 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, which then reacts with nitrogen oxides in the presence of a catalyst to produce harmless nitrogen and water.
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