What is the equivalent national emission standard for Euro IV?

[VanDiana]

Euro IV is equivalent to the National IV emission standard, which is the abbreviation for the fourth phase of China's motor vehicle pollutant emission standards. Below is a partial introduction to automotive emission standards: Introduction: Automotive emission standards refer to regulations on the content of harmful gases emitted from vehicle exhaust, such as CO (carbon monoxide), HC+NOx (hydrocarbons and nitrogen oxides), and PM (particulate matter, soot). Development Background: With the increasing severity of vehicle exhaust pollution, legislation on vehicle emissions became imperative. Countries around the world established corresponding regulatory systems for vehicle emissions as early as the 1960s and 1970s. Strict regulations have driven advancements in vehicle emission control technologies, and as these technologies continue to improve, the formulation of higher standards has become possible.