What is the equivalent national emission standard for Euro 4?

[StJosie]

Euro 4 is equivalent to China's National IV emission standard. Below are relevant details about the National IV emission standard: 1. It represents the fourth stage of national motor vehicle pollutant emission standards. 2. Achieved through technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices. 3. Controls and reduces vehicle emissions to levels below specified limits. Here are details about the Euro 4 emission standard: 1. Technically, the Euro V emission standard requirements are equivalent to China's National IV standard. 2. The Euro V standard (also known as Euro 4V) was implemented in late 2005 as a crucial vehicle exhaust emission benchmark. 3. Limits nitrogen oxide (NOx) emissions to 250 mg/km for diesel passenger cars and 390 mg/km for vans and SUVs. 4. China's National IV standard targets four major vehicle pollutants: HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). 5. Utilizes technologies including catalytic converter active layers, secondary air injection, and cooled exhaust gas recirculation systems to control emissions below mandated thresholds.