What is the standard code for National VI?

1 Answers
JakeLee
07/29/25 1:56pm
National VI is the code for the National 6 emission standard. Below are the specific details about the National 6 emission standard: 1. Identification: The identifier for the National 6 emission standard is "VI", represented by Roman numerals. National I corresponds to National 1, National II to National 2, National III to National 3, National IV to National 4, and National V to National 5. 2. Emission levels: The National 6 standard sets the carbon monoxide emission limit at 700 milligrams per kilometer. The National 6 standard is more stringent than National 5, reducing nitrogen oxides by 77%, particulate matter by 67%, introducing limits on particulate number, and tightening requirements for the durability of emission control devices and on-board diagnostic systems.
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