What is the National Emission Standard?

[DelChristian]

Emission national standards refer to the national regulations that limit the harmful gases emitted from vehicle exhaust, such as CO (carbon monoxide), HC+NOx (hydrocarbons and nitrogen oxides), and PM (particulates, soot). China 6 Emission Standard: The China 6 Emission Standard, also known as the National Sixth Stage Vehicle Pollutant Emission Standard, is established to control vehicle pollutant emissions and improve ambient air quality. Under the China 6a standard, the CO emission limit for gasoline and diesel vehicles is set at 0.5g per kilometer. China 6a adopts the lower limits of the China 5 standard, while China 6b represents the true implementation of the China 6 standard, imposing stricter controls on nitrogen oxide emissions. Introduction to China 6 Emission Standard: The China 6 Emission Standard is an upgraded version of the current China 5 standard. It imposes more stringent limits on emissions of CO (carbon monoxide), THC (total hydrocarbons), NMHC (non-methane hydrocarbons), NOX (nitrogen oxides), and PM (particulate matter) compared to the China 5 standard. Additionally, it introduces new regulations on PN (particulate number) emissions.