What are the indicators for China VI vehicle diesel standards?
4 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.
I have been working in environmental protection for ten years. The most critical aspect of the China VI diesel vehicle standards is the significant tightening of pollutant limits. Nitrogen oxides have been reduced from 180 milligrams per kilometer under China V to 60 milligrams, and particulate matter has been cut from 4.5 milligrams to 1 milligram. A new control on the number of fine particulate particles has been added, with a standard of 6x10^11 per kilometer. Ammonia emission limits prevent excessive use of urea, which could lead to new pollution. The testing standards have been expanded from laboratory conditions to real-world driving, requiring stable emissions under actual road conditions. Additionally, round-the-clock monitoring of fuel tank evaporation emissions has been introduced, which is crucial for improving smog issues.
When purchasing a China VI diesel vehicle, the salesperson mentioned several key indicators: the nitrogen oxide emission limit has been reduced to 60 milligrams, and particulate matter must not exceed 1 milligram. A new particulate number (PN) indicator has been added to control the total amount of fine particles in the exhaust. There's also an ammonia emission limit to prevent secondary pollution. These standards are much stricter than China V, even requiring measurement of fuel tank vapor emissions. Vehicles must also pass real-world driving emission tests to meet compliance. When choosing a vehicle, pay attention to these indicators. Additionally, using certified urea is essential during operation; otherwise, you may encounter issues during annual inspections.
