What does the China 6b emission standard mean?

[CooperRose]

The China 6b emission standard refers to the second phase of the implementation of the China 6 emission standard, which includes two phases: China 6a and China 6b. It requires a 50% reduction in carbon monoxide emissions from gasoline vehicles, a 50% decrease in the emission limits for total hydrocarbons and non-methane hydrocarbons, and a 42% stricter limit on nitrogen oxide emissions. Compared to China 6a, China 6b imposes more stringent requirements on emissions of carbon monoxide, non-methane hydrocarbons, nitrogen oxides, and PM fine particulate matter. The China 6b emission standard specifies the requirements for the sixth-stage type inspection of light-duty vehicle pollutant emissions, production conformity, and in-use compliance checks and determination methods. Manufacturers are obligated to ensure that the vehicles they produce and sell meet the requirements stipulated by the 6b emission standard.