What are the differences between China 5 and China 6 emission standards for passenger cars?
2 Answers
The differences between China 5 and China 6 emission standards for passenger cars lie in their control levels, release dates, and issuing authorities. Below are the specific distinctions between China 5 and China 6 emission standards for passenger cars: 1. Different control levels: The China 5 standard's emission control level is equivalent to the European Union's Stage 5 emission standards currently in effect. The China 6 standard for motor vehicle pollutant emissions is designed to prevent environmental pollution caused by exhaust emissions from compression-ignition and gas-fueled spark-ignition engines, protect the ecological environment, and safeguard human health. 2. Different release dates: The China 5 standard was released on September 17, 2013. The China 6 standard for motor vehicle pollutant emissions was released on June 22, 2018 (for heavy-duty diesel vehicles). 3. Different issuing authorities: The China 5 standard was issued by the Ministry of Environmental Protection. The China 6 standard for motor vehicle pollutant emissions was jointly issued by the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine.
I've just researched this, the main difference between China 5 and China 6 lies in the emission standards. China 6 is much stricter - for example, the nitrogen oxide emission limits are nearly halved compared to China 5, and particulate matter is significantly reduced too. The testing method has also changed from China 5's NEDC to the WLTC test cycle, which better reflects real-world driving conditions instead of being as idealized as before. Additionally, China 6 vehicles must be equipped with OBD real-time monitoring systems that can automatically detect emission failures, making them more reliable to drive. This means new cars might cost a bit more, but they're more fuel-efficient and environmentally friendly in the long run, helping reduce urban smog. I think this upgrade is quite worthwhile - many cities now restrict new China 5 vehicles from being registered, so buying a China 6 car avoids that hassle.
