When did China 4 start?

[Zoey]

China 4 emission standards started in 2011 and lasted until 2018 when China 5 standards were implemented. Vehicles produced between 2011 and 2017 all complied with China 4 standards. The China 4 standard required approximately 50% lower emissions of various pollutants compared to China 3. Below is extended information about China 4 emission standards: China 4 emission standards represent the fourth phase of national motor vehicle pollutant emission standards in China. Major automotive emissions include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). Through technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, these standards control and reduce vehicle emissions to below specified limits.

[AthenaLee]

I remember that China's National IV emission standards were implemented starting from July 1, 2011, mainly targeting light-duty vehicles such as private cars. At that time, the government introduced this measure to address urban smog problems, requiring new vehicles to significantly reduce pollutant emissions like nitrogen oxides and particulate matter. Automakers had to upgrade engine and exhaust purification technologies. I think this timeline is important because air quality did improve somewhat afterwards. Later in 2013, the standards were extended to heavy-duty vehicles, making overall emissions regulations stricter. As someone who follows automotive news regularly, I observed that National IV promoted environmental protection across the industry and encouraged more people to purchase clean energy vehicles. Looking back now, it seems quite meaningful.

[LuciaMarie]

I learned from my own driving experience that the China 4 emission standard officially came into effect in July 2011. At that time, I had just bought a new car, and the 4S store salesperson emphasized that it had to meet the China 4 standard, otherwise it couldn't be registered. I felt that the new car was more fuel-efficient, had lower emissions, and was a bit quieter. Later, by 2013, this standard was extended to trucks and buses, significantly reducing the number of dirty, smoky vehicles on the road. Personally, I think the timing was well chosen, coinciding with the peak of rising environmental awareness, helping to control PM2.5 pollution. Even on hot summer days, going outside wasn't as irritating to the nose. Nowadays, when people talk about cars, they occasionally mention China 4 because it marked the beginning of a new era, but let's not forget the subsequent, even stricter China 5 and China 6 standards.

[Venus]

The China IV emission standard was implemented around July 1, 2011. It requires vehicles to reduce exhaust pollutants and improve fuel efficiency. After the standard took effect, newly registered vehicles must comply. Personally, I think this is beneficial for the environment.

[LaCooper]

I remember the China IV emission standard was implemented in July 2011, mainly targeting light-duty vehicles. As someone concerned about air quality, I consider that a turning point - vehicle emissions dropped by about a quarter, urban haze decreased, and we smelled less pungent odors while driving. The standard advanced catalytic converter and electronic control system technologies, which automakers still use in similar solutions today. The subsequent China V standard introduced stricter requirements starting in 2017. This entire process helped achieve China's environmental protection goals. The timing of China IV was precise, coinciding perfectly with industrial upgrades to make our daily lives cleaner.