What are the consequences of not adding urea to diesel vehicles?

[BennettLee]

Diesel vehicles can operate normally without urea, but this will have certain impacts on the vehicle. Adding urea primarily aims to reduce carbon and nitrogen compound emissions. While omitting urea doesn't directly affect the engine, it leads to excessive emissions, causing environmental pollution. Prolonged non-use of urea will rapidly oxidize chemicals in the diesel vehicle's system and clog the urea injector, potentially rendering the entire system inoperable. Below is an introduction to automotive urea: 1. Origin: Automotive urea solution was first used in Europe under the name AdBlue, referred to as DEF (Diesel Exhaust Fluid) in North America, and known as "automotive urea solution" or "vehicle denitrification agent" domestically in China. However, it is now commonly unified as "automotive urea" in China. 2. Function: Automotive urea solution is crucial for reducing pollutant emissions from diesel vehicles. It is a urea-based chemical reactant, composed of high-purity urea mixed with deionized water, forming a 32.5% concentration solution. Applying automotive urea solution in SCR systems is key to enabling engine exhaust emissions to meet National IV and higher emission standards.