What is the method to distinguish between China 6a and 6b?

1 Answers
RuthLee
07/29/25 2:22am
The methods to distinguish between China 6a and 6b are: 1. Different carbon monoxide emission levels; 2. Different non-methane hydrocarbon content; 3. Different nitrogen oxide content; 4. Different PM (particulate matter) content. The China 6a emission standard stipulates that carbon monoxide emissions must not exceed 700 mg per kilometer, non-methane hydrocarbons must not exceed 68 mg per kilometer, nitrogen oxides must not exceed 60 mg per kilometer, and PM must not exceed 4.5 mg per kilometer. The China 6b emission standard stipulates that carbon monoxide emissions must not exceed 500 mg per kilometer, non-methane hydrocarbons must not exceed 35 mg per kilometer, nitrogen oxides must not exceed 35 mg per kilometer, and PM must not exceed 3 mg per kilometer.
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