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How to Identify China 6a or China 6b?

1 Answers

MacVivienne

07/29/25 10:02am

China 6b has not been officially implemented yet. Currently, vehicles on the market that comply with the China 6 standard generally meet the China 6a specifications. 1. The China 6a standard specifies the following: The carbon monoxide emissions per kilometer driven by a gasoline vehicle must not exceed 700 milligrams. The non-methane hydrocarbon emissions per kilometer driven by a gasoline vehicle must not exceed 68 milligrams. The nitrogen oxide emissions per kilometer driven by a gasoline vehicle must not exceed 60 milligrams. The PM (particulate matter) emissions per kilometer driven by a gasoline vehicle must not exceed 4.5 milligrams. 2. The China 6b standard specifies the following: The carbon monoxide emissions per kilometer driven by a gasoline vehicle must not exceed 500 milligrams. The non-methane hydrocarbon emissions per kilometer driven by a gasoline vehicle must not exceed 35 milligrams. The nitrogen oxide emissions per kilometer driven by a gasoline vehicle must not exceed 35 milligrams. The PM (particulate matter) emissions per kilometer driven by a gasoline vehicle must not exceed 3 milligrams.

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