It has been 23 years since the implementation of the "National One" standard in July 2001. At present, the emission standard being implemented in the mainland is "China VIB". Along the way, the continental emission standards have been benchmarked against the European Union for a long time. For example, on the basis of "Euro One", the "National One" was born after adjustment according to the national conditions of the mainland, and the "National Six" was based on the "Euro Six......
Now it is basically certain that if nothing else, the "Euro VII" standard will be launched in 2025, and it will not be far off to meet the "National VII". In fact, the relevant departments mentioned the "National Seven" a few years ago, intentionally or unintentionally. At present, it can be met that the life of oil vehicles will be even more difficult at that time, especially diesel cars.
Euro VII emission standards are coming
10 times harsher than China VIB
Because at present, the "National VI B-PN11" stage requires that the number of exhaust particulate matter particles does not exceed 600 billion per kilometer, while the "Euro VII" stipulates that it does not exceed 60 billion particles per kilometer, and the requirements are suddenly 10 times stricter!
According to the objective fact that the current hydrogen fuel cell technology is relatively imperfect, the system cost remains high, and it is difficult to popularize, assuming that the "Euro VII" will really be launched on time in 2025, it is expected that after 2026, gasoline hybrid + electric vehicles will dominate the market, and the gradual withdrawal of pure fuel vehicles will be the general trend.
Euro 7 has increased the dust control index
Brakes and tires included
This is not the end of the matter, because the "Euro VII" has several special requirements compared to previous emission standards, namely: tire wear, brake particulate emission limit (PM10) and minimum performance requirements for battery durability of pure electric and hybrid vehicles (no less than 80% capacity for 5 years; and no less than 70% capacity for 7 years).
Battery durability is well understood, so I won't elaborate on it. In terms of brake system, reducing the dust of the brake system is mainly achieved by adjusting and changing the composition of the brake pads, such as ceramic fiber brake pads, and the amount of dust released is much lower than that of other types of brake pads, which is bound to become the mainstream in the future. And some old-fashioned high-carbon brake pads can make your wheels dirty in a week, which is an excess of brake dust!
And what most people don't understand is to talk about tires. In fact, the micron-level dust generated by the friction between the tire and the ground cannot be seen by the naked eye, and is generally suspended in the range of 2 meters above the ground, and it is easy to enter the human body with breathing. Authoritative reports say that tire particulates have become the second largest source of particulate air pollution, with about 6.1 million tons of tire particulate matter entering our atmosphere and oceans every year, which can cause huge damage to humans and the environment.
Tire dust control schemes
Absorber & Tire Improvements
At present, there are two ways to control tire dust: adding absorbers to the vehicle and improving the wear resistance of tires. The former, a special device developed based on the principle of electrostatic adsorption, is currently in the testing stage, for example, Volvo is involved in this project, but it is not yet known whether it will be installed in batches.
As a tire company, what we are thinking about is how to improve the wear resistance of tires. Because the more wear-resistant the tire, the lower the wear and tear for the same mileage, which means the less dust is released. But it's too easy to simply improve the wear resistance! Add carbon black to the dead and you're done. Just like the "TAXI tires", anyway, only wear resistance is sought, as for the rest of the quiet, grippy, and safe...... I AM SORRY？？？
Therefore, the real difficulty is that on the basis of improving the wear-resistant performance, the performance of other aspects has also been enhanced, which depends on the strength of the tire company itself. In reality, is there a case where the wear resistance can be improved at the same time, and other performance is also improved? Yes, the following Bear brand US2 tires may be a typical case.
Improve wear resistance and reduce dust
What about other aspects of performance?
The Bear US2 adopts a new low glass transition temperature rubber formula, with a new generation of additives, with the blessing of the unique "paper dart" pattern, compared with the previous US1 tire, the wear resistance has been increased by 10%, and the rolling resistance has been reduced by 8%. So what kind of answer did SU2 deliver?
Compared with the US1, the performance of the US2 in wet braking has been improved by 6%, which is very remarkable! It shows that the grip stability of the tires and the ground has been significantly improved! In addition, the handling and waterproof drift have also been improved. What is Total Evolution?US2 may be a textbook existence!
In the near future, US2 will undergo another upgrade, evolving in a safer, quieter, and more powerful direction. Perhaps this is a microcosm of the efforts of auto parts companies before the world enters the "seven eras"!