What is the basis for the 2021 vehicle exhaust emission test standard values?
4 Answers
2021 vehicle exhaust emission test standard values are implemented according to the China VI standard. The following is an introduction to vehicle exhaust emission testing: Introduction to the China VI standard: The National VI standard for motor vehicle pollutant emissions refers to the standard formulated to implement the "Environmental Protection Law of the People's Republic of China" and the "Air Pollution Prevention and Control Law of the People's Republic of China," aiming to prevent pollution from the exhaust of compression-ignition and gas-fueled ignition engine vehicles, protect the ecological environment, and safeguard human health. It includes two parts: "Limits and Measurement Methods for Emissions from Light-duty Vehicles (China VI)" and "Limits and Measurement Methods for Emissions from Heavy-duty Diesel Vehicles (China VI)." The China VI emission standard is the National VI standard for motor vehicle pollutant emissions, formulated to prevent pollution from the exhaust of compression-ignition and gas-fueled ignition engine vehicles, protect the ecological environment, and safeguard human health. Emission standards of China VI: Carbon monoxide emission content is 700mg; non-methane hydrocarbon emission content is 68mg; nitrogen oxide emission content is 60mg; particulate matter emission content is 4.5mg.
I usually enjoy studying automotive technology. I noticed that the 2021 exhaust emission standard values are primarily based on vehicle emission control system performance, specifically setting limits for different pollutants such as carbon monoxide (CO) and nitrogen oxides (NOx), with reference to China's National VI Emission Standard GB 18352. This standard is based on laboratory test results, ensuring that engines maintain low pollution output under various operating conditions, while also considering hardware optimizations like catalytic converters to prevent air quality deterioration. The promotion aims to encourage automakers to adopt cleaner technologies and help vehicle owners understand the necessity of regular maintenance. For example, timely replacement of air filters can effectively reduce emissions and ensure smooth passage of annual inspections, which is crucial for urban environmental improvement.
As an environmentally conscious individual, I believe the 2021 exhaust emission standards were established based on environmental protection regulations, with the core objective of safeguarding human health and atmospheric quality. The standard values are set through scientific assessment of pollutant hazards, such as referencing WHO health guidelines, aiming to reduce respiratory harm caused by vehicle emissions. China's policies have reinforced this approach to address air pollution issues like smog, requiring vehicles to meet specific thresholds during testing, such as CO not exceeding 0.1g/km. This practice encourages manufacturers to produce energy-efficient models and reminds us vehicle owners of the importance of regular maintenance—for instance, choosing high-quality fuel can help meet standards. In the long run, this contributes to cleaner urban air.
From a policy perspective, the 2021 exhaust emission testing values are based on the National Environmental Protection Law and related standard documents, such as GB 18352.6-2016. These regulations take into account industry technical feasibility and ecological balance requirements. The standard values set strict limits, which are determined based on the average emission levels of tested vehicles under various driving conditions. The purpose is to ensure that both new and old vehicles meet environmental protection thresholds. After implementation, it has improved testing efficiency, encouraged vehicle owners to promptly repair faulty components, prevented pollution spread, and maintained road safety and harmony.
