What is the composition of the urea added to trucks?
2 Answers
Automotive urea is composed of 32.5% high-purity urea and 67.5% ultra-pure water. Function of automotive urea: The harmful substances in diesel vehicle exhaust are mainly nitrogen oxides and particulate matter. Technical means can be used inside the engine to reduce particulate emissions, leaving mainly nitrogen oxides in the exhaust. By injecting urea into the exhaust after-treatment device, the urea decomposes into ammonia at high temperatures, which reacts with nitrogen oxides under the action of a catalyst to produce harmless nitrogen and water. This device is called the SCR after-treatment system. Meaning of automotive urea: "Urea solution," as the name suggests, is urea dissolved in a liquid, and this liquid is water. To put it simply, it is no different from dissolving sugar or salt in water in your kitchen.
I've researched this. The urea added to trucks usually refers to the urea solution used in SCR systems, primarily composed of 32.5% high-purity urea (a chemical compound) dissolved in 67.5% deionized water. This formulation isn't arbitrary—it undergoes rigorous testing to effectively react with harmful nitrogen oxides in exhaust gases, converting them into harmless nitrogen and water vapor, thereby reducing air pollution. Specifically, the urea concentration must be precise, as excessive impurities can damage the catalyst. The water must be pure and deionized to prevent scale buildup that could clog the nozzles. Using incorrect ordinary urea or water may lead to system failures and increased maintenance costs. I recommend regularly checking the fluid level, avoiding storage under high temperatures, and ensuring the quality meets standards, as this is crucial for engine performance and regulatory compliance.
