What are the indicators for China VI vehicle diesel standards?
2 Answers
The indicators for China VI vehicle diesel standards are: sulfur content reduced to no more than 0.035%, removal of acidity index requirements, fuel index requirements for automotive lubricity and methyl esters, polycyclic aromatic hydrocarbons (PAH) index reduced to 7%, and cetane number further increased to a standard of 49. The role of reducing polycyclic aromatic hydrocarbons: Lowering PAH can effectively reduce vehicle pollutant emissions. Therefore, for diesel vehicles, the standard for PAH mass fraction has significantly decreased from 11% to 7%. Additionally, the technology for detecting total pollutant content has been improved, and the flash point index limit for diesel vehicles has been raised. China VI fuel standards: After a series of indicator adjustments, China VI fuel can reduce carbon monoxide emissions by approximately 59% and hydrocarbon emissions by about 42%, significantly mitigating the negative impact of vehicle emissions on the atmospheric environment.
I've been driving diesel vehicles for over a decade. The China VI emission standards are indeed much stricter, with key indicators including nitrogen oxide emissions needing to be at least 77% lower than China V standards, and particulate matter emissions reduced by about 67%. There are also two new indicators - particle number limits to control those tiny particles, and ammonia emissions must not exceed 3 milligrams per kilometer. Real Driving Emissions (RDE) testing is now mandatory, so you can't just pass tests in the lab. These standards don't just limit exhaust emissions; they even regulate fuel tank vapor emissions, with evaporation emission tests now including summer air conditioning conditions. After adopting these standards, you'll need to frequently add qualified urea, otherwise the DPF (Diesel Particulate Filter) will clog up and cause bigger problems.
