When will the China IV standard for diesel engines be implemented?
3 Answers
The China IV emission standard for diesel engines was originally scheduled to be implemented on January 1, 2010. Here is a brief introduction to the China IV emission standard: 1. Pollutant emission standards: The China IV emission standard is the national fourth-stage motor vehicle pollutant emission standard. The main pollutants emitted by vehicles include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), PM (particulate matter), etc. The China IV emission standard for diesel engines was originally scheduled to be implemented on January 1, 2010. However, the China IV standard for diesel vehicles over 3.5 tons was postponed for two years, while diesel vehicles under 3.5 tons were delayed for three years, with the China IV standard being implemented on July 1, 2013. 2. Recirculation system: Through the application of technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, the standard aims to control and reduce vehicle pollutant emissions below specified levels.
As a long-time diesel vehicle user, I remember that the China IV emission standards were fully implemented nationwide on January 1, 2015, with some cities piloting them earlier. My old diesel vehicle at that time faced challenges because non-compliant vehicles would be subject to traffic restrictions or fines, requiring urgent system upgrades. After the standards took effect, tailpipe pollution significantly decreased, especially sulfur and particulate emissions, making urban air noticeably fresher. Later in 2017, the standards advanced to China V, accelerating technological updates. As a vehicle owner, I recommend checking the registration date—pre-China IV used cars may now face more restricted zones, so verify policies before travel. Although emission upgrades are costly, they benefit the environment, improve long-term fuel efficiency, and enhance reliability. Regular maintenance, especially of the EGR valve and DPF filter, is crucial as these small components often cause compliance issues. Ultimately, adhering to standards is every driver’s responsibility—for public health, compliance should never be delayed.
As someone quite interested in automotive technology, I know that the China IV emission standards for diesel engines became mandatory in 2015. These standards require stricter emission controls, such as using advanced aftertreatment systems to reduce harmful substances. According to my research, China IV represents significant improvements over China III, pushing manufacturers to adopt high-pressure common rail technology for more stable performance. Then in 2017, China V followed with even tighter emission limits. For older vehicles, especially those manufactured before 2013, they might not comply and may require part replacements or even scrapping. In practice, the new standards also improve fuel efficiency, making driving more economical and eco-friendly. I recommend checking your vehicle's certification documents and taking action before facing penalties. Upgrades are inevitable, and I expect even stricter regulations when China VI becomes widespread. Understanding these details is very helpful for car purchasing and maintenance.
