In which year was the China IV diesel standard implemented?
2 Answers
Starting from January 1, 2015, the China IV emission standard was fully implemented for diesel vehicles. Automobile emission standards refer to the harmful gases emitted from exhaust, such as CO (carbon monoxide), HC + NOx (hydrocarbons and nitrogen oxides), and PM (particulate matter, soot). Below is more detailed information: 1. Automobile emissions refer to harmful gases discharged from exhaust, including CO (carbon monoxide), HC + NOx (hydrocarbons and nitrogen oxides), and PM (particulate matter, soot). These are all harmful gases produced during the engine's combustion process. 2. The China IV emission standard is the fourth-stage national standard for motor vehicle pollutant emissions. The main pollutants from vehicle emissions include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). 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 emissions to below specified levels.
The National IV emission standard for diesel vehicles was officially implemented in July 2013. However, I remember it was rolled out in phases, with pilot programs starting in some cities as early as 2011. What worried us drivers most was whether fuel quality could keep up. Sure enough, in the beginning many gas stations had diesel with sulfur content exceeding standards, causing black smoke from vehicle exhaust pipes and getting pulled over by traffic police—we could only blame our bad luck. Looking back now, the implementation of this standard forced oil refineries to upgrade their equipment, which can be considered a good thing.
