In which year did China's National IV emission standard come into effect?
2 Answers
China's National IV emission standard was implemented in 2011 and remained in effect until the introduction of the National V standard in 2018. Therefore, vehicles produced between 2011 and 2017 comply with the National IV standard. The National IV standard requires a reduction of approximately 50% in various pollutant emissions compared to the National III standard. Here are some relevant details: 1. National IV Standard: The National IV emission standard is the fourth stage of China's motor vehicle pollutant emission standards. The main pollutants from vehicle emissions include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). The standard aims to control and reduce these emissions below specified limits through technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices. 2. Reference for Emission Standards: The frequent updates to emission standards are due to the increasing number of vehicles, which has led to worsening environmental pollution from vehicle exhaust. Vehicle exhaust contains harmful gases such as carbon monoxide and hydrocarbons, and the emission standards set limits on the discharge of these gases. China's emission standards are primarily based on European Union standards, with some adaptive modifications made to suit local conditions.
I remember the China IV emission standards were fully implemented starting from 2011, specifically taking effect on July 1st of that year. Having driven older vehicles before, the pollution under the China III standards was severe, making hazy days particularly uncomfortable. When the new regulations came into effect in 2011, all new vehicles had to meet stricter standards, such as being equipped with better three-way catalytic converters, which significantly reduced harmful gas emissions. As a veteran driver with decades of experience, I've witnessed the improvement in air quality. From that year onward, annual vehicle inspections also placed greater emphasis on emission testing, requiring annual checks of the OBD system to ensure compliance. Although heavy-duty vehicles didn't follow suit until 2013, 2011 marked a critical turning point for light-duty vehicles, driving automotive manufacturers to innovate. Nowadays, checking the emission label has become a common practice when purchasing cars. After implementation, cities saw more blue skies, making daily commutes much more reassuring.
