Through advanced filtration technology and high - quality materials, we ensure that our DPFs meet the most stringent environmental standards helping to improve air quality and protect the environment.
Through advanced filtration technology and high - quality materials, we ensure that our DPFs meet the most stringent environmental standards helping to improve air quality and protect the environment.
National VI emissions are currently the most concerning topic for everyone, and from buying a car to using it, the entire commercial vehicle market is paying attention to the country's every move. But what are the differences between engines with National VI emissions? For many cardholders, they may not know much about it. Taking advantage of the popularity of the internal combustion engine exhibition, let's take a look at what makes National VI so impressive!
What is National VI A/B
At present, there are actually two standards for National VI emissions, namely National VI A and National VI B. Some car enthusiasts may ask, what is the difference between National VI A and National VI B for diesel engines? Here's a brief introduction. The National VI A emission standard requires that gasoline and diesel vehicles emit 0.5g of carbon monoxide per kilometer, and the overall National VI A standard adopts the minimum limit of the National V standard.
And National VI B is the true National VI emission standard, which strictly controls nitrogen oxide emissions. The data has been reduced from 180g/km to 35g/km, which is less than 20% of the former. It also imposes limits on nitrogen dioxide emissions, which have not been encountered in the National V stage.
In order to meet the National VI B emission standards, major engine manufacturers have also made every effort to continuously carry out technological innovations, from the engine itself to post-treatment. All demonstrate the highest precision technology from major manufacturers, ensuring that the technology route they use can fully match their own engines.
At present, there are two main types of processing methods for National VI B engines:
1 EGR+DOC+DPF+SCR， This is also a commonly used processing method by major domestic host manufacturers, which is relatively mainstream and widely used.
2. It is a post-processing route used by a small number of manufacturers. In order to achieve high efficiency SCR+DOC+DPF, the presence of EGR is eliminated throughout the entire processing process, and the urea injection amount in the SCR section is increased, which can also achieve the effect of reducing nitrogen oxides.
