Depending on how the vehicle is driven, cars can be divided into two-wheel drive, four-wheel drive, and even six-wheel drive. The most common is two-wheel drive, but with the rise of off-road vehicles and SUVs, four-wheel drive has gradually won the favor of major automobile manufacturers with its excellent performance, and has begun to be widely used in related models.

Compared with two-wheel drive, four-wheel drive refers to the vehicle throughout the driving process, has maintained the form of four-wheel drive, the torque output of the engine is distributed to the front and rear wheels in a fixed proportion, although the fuel consumption is higher, but this drive form has better off-road type and handling stability, so it has been widely used in off-road vehicles and SUVs.

If the four-wheel drive is subdivided, it can be divided into timely four-wheel drive, time-sharing four-wheel drive and full-time four-wheel drive.

Shared four-wheel drive has been used for the longest time, so it is more stable in terms of performance. The so-called time-sharing four-wheel drive, refers to the driver can be according to the different road conditions, manually switch to two-wheel drive or four-wheel drive mode, this switching is achieved through the transfer case, the use of time-sharing four-wheel drive SUV, generally have these gears, respectively, corresponding to two-wheel drive, high-speed four-wheel drive and low-speed four-wheel drive.

Although the stability of time-sharing four-wheel drive is the best, but because there is no central differential in the transfer case, when from the two-wheel drive to the four-wheel drive mode, the front and rear axles are rigidly connected, and the power is distributed in a fixed proportion, if the turning is carried out on the paved road, the turning radius of the front wheel is larger than the rear wheel on the same side, the speed of the front wheel is faster than that of the rear wheel, and the speed of the front and rear axles is different, and the phenomenon of "turning brake" will occur, causing damage to the transfer case, differential and other components.

The common hard-core four-wheel drive Pajero, Cherokee, as well as the city, Roewe W5 and other models, use this kind of time-sharing four-wheel drive.

Compared with time-sharing four-wheel drive, the structure of timely four-wheel drive is the simplest, but the driving effect is also the worst, this four-wheel drive form is the vehicle according to the driving road conditions, automatically switch to two-wheel drive or four-wheel drive mode, although the action of manual operation is omitted, but it is easy to cause damage to the four-wheel drive system, the initiative is not as good as the time-sharing four-wheel drive, and the off-road performance can not meet the corresponding requirements.

However, because it is more convenient to drive a car equipped with timely four-wheel drive, it is widely used in urban SUV models, such as Honda's CR-V, Toyota's RAV4, X-Trail, Koleos and other models, all of which are equipped with such a four-wheel drive system.

The full-time four-wheel drive that Zhou Jingming just proposed is the most complex structure and the most powerful form of four-wheel drive in the four-wheel drive system.

The word "AWD" that often appears on the rear of some SUV cars refers to the English abbreviation of "e" for full-time all-wheel drive.

Compared with the time-sharing four-wheel drive, the full-time four-wheel drive transmission system is equipped with a central differential, because the four-wheel drive mode has been maintained, so there is no response time for two-wheel drive and four-wheel drive switching, the active safety is better, and the traction can be more stable, even if it encounters extreme road conditions, the full-time four-wheel drive vehicle also has a high passability and stability.

However, because the cost of full-time four-wheel drive is expensive, it is generally used in mid-to-high-end SUVs, such as Mercedes-Benz's 4MATTC, BMW's Xdrive, Audi's QUattro and Acura's SH-AWD, etc., are all famous full-time four-wheel drive systems.

And what Zhou Jingming wants to exchange with Audi is Audi's world-renowned Quattro full-time four-wheel drive system!

Immediately after the presentation of the first Quattro sedan at the Geneva Motor Show in 1980, the technology was an instant sensation and ushered in an immortal era of mythology, with which Audi won numerous awards in various motor racing competitions, such as the WRC World Rally Championship and the 24 Hours of Le Mans.

It can be said that this technology has almost become the synonym of full-time four-wheel drive technology, although BMW, Mercedes-Benz and other car manufacturers also have corresponding full-time four-wheel drive systems, but in terms of fame, it is far inferior to Audi's Quattro system.

Quattro all-wheel drive technology has established an unshakable position for Audi AG in the field of motorsport and civil vehicles, and the system not only represents the full-time all-wheel drive, but also represents the technical concept of extraordinary power and driving safety, which has become an important part of Audi's subsequent model design, as if it has become a corporate culture.

Because of these, Zhou Jingming will want to exchange this technology with Audi, four-wheel drive can be said to be the standard configuration of SUV, ordinary four-wheel drive technology, Zhou Jingming thinks that it is not complicated, as long as Tianming company is willing to invest energy, at most one year, Zhou Jingming can develop his own four-wheel drive technology, but the Quattro system is different from the conventional four-wheel drive, if you simply rely on Tianming company itself, the cycle on the support will be very long, Zhou Jingming does not want to wait, so there will be ESP system to exchange the proposal of the Quattro system。

Of course, from the perspective of reciprocity, the ESP system is far from being comparable to the Quattro system, but Zhou Jingming is not in a hurry, because he still has the rest of his hole cards.

"Mr. Zhou, I'm afraid we can't agree to this proposal. Sure enough, when Zhou Jingming made this proposal, Brant didn't think about it, and directly shook his head and refused.

The Quattro all-wheel drive system is so important to Audi that an ESP system is not enough for them to bring this core technology to life.

Zhou Jingming was not surprised by Brandt's refusal, "Does Mr. Brandt want to make a decision after listening to me?"

Brant looked at Zhou Jingming suspiciously, not knowing what Zhou Jingming was selling.

"Although the full-time four-wheel drive technology is very precious, but it is not to the point of difficulty, the major car manufacturers have their own full-time four-wheel drive system, our Tianming Automobile Company is not to say that there is no ability to develop this technology, I just think, since you already have this technology, I put into research and development, a bit of useless work, so it will be proposed to use the way of technology exchange to take what you need. ”

"There are indeed a lot of full-time four-wheel drive technologies, and the difficulty of research and development is not very great, and I believe that with Mr. Zhou's ability, he will definitely be able to complete the development of this technology in a short period of time, which I have no doubt. Brant paused, and his tone became proud, "However, there is only one Quattro full-time four-wheel drive system in the world!"

The meaning of Brandt's words is very simple, there are many full-time four-wheel drive, but if you want to achieve this technology like the Audi Quattro, there is only Audi in the world!

Zhou Jingming smiled, "I admit that what Mr. Brandt said is true, which is why I insist on working with Audi instead of other companies." ”

"Mr. Brandt, though, can take a look at this first, and perhaps you might change your mind. With that, Zhou Jingming took out a prepared document and handed it over.

This is also the last hole card prepared by Zhou Jingming.

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