Do China V Diesel Vehicles Require Urea?

[VonVictoria]

First, according to the requirements of the Ministry of Environmental Protection's China V standard implementation announcement, starting from January 1, 2018, all domestically manufactured, imported, sold, and registered light-duty diesel vehicles nationwide must comply with the China V standard requirements. In other words, in the market, you simply cannot purchase a new vehicle that is not China V compliant (although there may be exceptions, illegal activities are strongly discouraged). Secondly, if urea is not added or emissions exceed the standard, during the annual vehicle inspection, the management authorities can use specialized testing equipment to detect violations and impose corresponding penalties according to regulations. This means that for China V vehicles, failing to add urea or not meeting standards will result in penalties. Additionally, not adding urea to China V vehicles can lead to the following consequences: 1. Environmental pollution: China V SCR vehicles are calibrated with advanced timing to balance particulate emissions. If urea is not injected, nitrogen oxide emissions can be even worse than those of China III vehicles, harming future generations—something best avoided. 2. Long-term absence of urea circulation can cause crystallization blockages or high-temperature damage to the injector, pipelines, and urea pump, leading to very expensive repairs. 3. If following regulations, not adding urea, using water, or diluting urea with water will trigger the emissions warning light and limit engine torque, making the vehicle significantly underpowered. Of course, if the manufacturer itself violates regulations, no warning will appear. 4. There is no impact on the engine's lifespan and performance, the catalyst carrier, or the exhaust temperature and NOx sensors. A China V engine is not simply a China IV engine with an SCR aftertreatment system. After corresponding improvements, a China V SCR engine, due to more complete combustion, can be more fuel-efficient than a China IV engine.