What does China 5+OBD mean?

[LaEdward]

Vobd can be understood as: vehicles with the "China 5" emission standard self-diagnosis system, mainly designed for environmental protection issues. China V refers to the automobile emission standard, which should meet the specified fifth level (mainly some requirements for exhaust gas components). OBD is the acronym for On-Board-Diagnostics in English, and the Chinese translation is "on-board automatic diagnosis system". It is a system that monitors engine emissions and working conditions. More details are as follows: 1. Meaning of emission standards: Automobile emission standards refer to the regulations on the content of harmful gases such as CO (carbon monoxide), HC+NOx (hydrocarbons and nitrogen oxides), and PM (particulates, carbon smoke) emitted from automobile exhaust. Starting from January 1, 2004, Beijing will change the current European I standard for motor vehicle exhaust emissions to European II standard, and by 2008, the European III standard will be officially implemented. 2. Meaning of China V: The National Fifth Stage Motor Vehicle Pollutant Emission Standard, also known as the "China 5 standard", has an emission control level equivalent to the fifth stage emission standard currently implemented in Europe. The European Union has been implementing it since 2009, with stricter limits on motor vehicle emissions such as nitrogen oxides, hydrocarbons, carbon monoxide, and suspended particles. From China I to China IV, each upgrade in the standard reduces single-vehicle pollution by 30% to 50%.