The Q5 part that Xu Fufang is responsible for has also been completed. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ

In fact, if it weren't for the time and space before the historical process was changed, Q5 sales in the Chinese market were very strong. Wanting to maximize the increase in double point BUFF with sales, as well as the cooperation between this product launch and biodiesel wall-breaking plan, Li Fanyu didn't want to make this car out at all.

Why?

Because the impression of this car on Li Fanyu is really bad.

Let's just say that in the time and space before history changed, the Q5 can be said to be the most distinctive and the most uncharacteristic car under Audi.

This car, in fact, is also a newcomer in the Audi family. Not as long as A4 and A6. This car was first launched in '07 and launched in China in '08.

At the beginning of product design, it was to come to the Chinese market.

Therefore, it can be seen that this SUV model is developed on the A4 sedan platform and adopts the design style of the third-generation Q7.

This may or may not be the biggest highlight. It is said that it is unique because this guy has all the shadows of the two generals in the Audi family at that time, the A4 and Q7, and it is said that he is not distinctive because the Q5 does not have even a little other advantages other than these shadows.

At the beginning of the launch, the only thing that the Q5 was praised was that it was equipped with the quattro full-time four-wheel drive system that had been dominant in the field at that time, as well as the so-called "sensitive form structure", but the immature seven-speed dual-clutch transmission was installed on the car, because of its limited bearing capacity, the performance of the vehicle power when the electronic control unit was involved in the control power was quite weak, and even helpless. And while Audi claims it to be a "sporty and all-round SUV," it doesn't feature some features such as differential locks and inter-wheel slip limits, which makes the "all-round" SUV less capable of off-road.

After 2008, it went through three facelifts in time, and this problem has not been solved until the big replacement before Li Fanyu got Xapp.

Therefore, in Li Fanyu's heart, if the Q5 car is driven as a sedan, it is absolutely okay. The ride feel is basically the same as that of the A4. But if you want to go off-road, then hurry up and rest.

In a word, this is a good car without talking about off-roading.

But in other words, if we don't talk about off-road, let's buy a cheaper A4, okay?

With the R&D level of Audi in that time and space, Li Fanyu said that this problem could not be solved, and Li Fanyu did not believe it.

It can only be said that Audi is lazy to change; after all, the sales are there, and the good or bad ones are not delayed in selling, so change it to find that trouble to do a wool?

But since Li Fanyu wants to put this car on the market, then he will definitely not do anything to cheat. The Germans can go to the Chinese market to make money, but Li Fanyu makes cars, but he has to sell them to his parents and fellow villagers!

Money, it's definitely going to be earned. Things must be done. However, conscience must be spoken.

So, after redeeming this car in the first place. Li Fanyu made certain modifications to this model.

In addition to the original ZGX888 series gasoline 2.0TFSI and 2.0FSI gasoline engines, a 3.0TDI turbodiesel engine with enhanced off-road performance has been added.

Needless to say, this change is an important part of the biodiesel wall-breaking program. So even if you don't think about improving the performance of Q5, it's a must.

And the strong power has to be matched by an excellent gearbox. That's why it's always said that the engine and gearbox are a powertrain.

In addition to the upgraded and enhanced seven-speed dual-clutch transmission on the RS to the flagship version, it improves the speed of shifting and road performance. Li Fanyu also paired an 8AT automatic transmission derived from Cadillac with the diesel-powered version to further improve the stability of the vehicle and the power output under ground torque.

In terms of drive, he and Xu Fufang's team worked together to configure the manual mechanical differential lock that has passed the patent period in this time and space to all Q5 models.

This technology, while not new, is still a must-have tool for most off-road bike dealers on the market.

Why?

This has to be compared with the differential lock, a good friend who has fallen in love and killed for half a century - the differential;

Today's cars are equipped with differentials in order to get better driving power.

In the past, the wheels on both sides of the carriage were connected by a hard axle, so the rotational speed of the wheels on both sides was always the same. Because there is no differential, the inner wheel has sliding friction in addition to rolling friction when cornering.

Fortunately, the wheels of the carriage are made of wood and are wear-resistant...... And the horse was stupid, not knowing that the difference in speed between the two wheels would make it so tired......

But to be reasonable, cars have the same problem when turning. If a hard shaft is still used, the tires and other parts of the car will be seriously damaged when cornering.

In order to solve this problem, the car is designed with two half shafts, and the two half shafts are linked together by a differential, which also allows the two wheels to have a speed difference. When cornering, four tires get better driving performance.

It sounds lofty, but this technique is actually a set of star gears to achieve different rotational speeds on both sides of the wheel;

A set of planetary gears in the differential housing can be abstracted as a "gear" with only one tooth, that is, a stick that can connect the two half-shafts on both sides and drive the two half-shafts to rotate.

But in addition to rotating with the propeller shaft, this stick can also rotate on its own.

If the friction force on both sides of the vehicle is the same, then the stick will not have rotation, that is, the speed of the wheels on both sides is also the same; if the friction force on one side of the wheel is greater than that of the other side, then the stick itself will rotate, so that without changing the rotation speed and rotation, the purpose of the rotation on both sides can be achieved.

In other words, if one wheel is stuck and can't turn, that's fine, although the power is still there, but the stick that rotates will drive the wheel that isn't stuck to turn.

If more sticks are added, a gear, a planetary gear, is also the core of the differential.

But the car is equipped with this thing, then the problem arises.

With this, the tires on both sides can have different revolutions, so in bad road conditions, it is particularly troublesome.

For example, if the car is stuck in the sand or mud, one wheel is stuck, and the other wheel is slippery. This is where the differential comes into play, because the mission and purpose of the differential is to allow for a speed difference between the two wheels.

In this way, the stuck side of the wheel remains stationary, while the other wheel spins wildly due to the action of the differential.

One side is stuck, and the other side is spinning. Not to mention moving forward, the car is likely to sink deeper and deeper.

And the differential lock, in fact, is a thing that is meant to prevent this differential from working.

The same is true in the case of one wheel getting stuck and one wheel slipping. If you lock the differential with a differential lock and make the two half-axles hard-linked, you can transfer power to the "stationary" wheel.

The differential lock will make use of the tooth inlay structure, so that the two half shafts are rigidly connected to make it a single unit.

This way both wheels can get the same power, so that the vehicle can get out of trouble.

That's where the differential lock comes in!

The differential lock that Li Fanyu is equipped with for the Q5 is actually a particularly old thing. The production cost is only more than 200 yuan, and such a low cost means that the structure of this thing is not complicated.

This differential lock cannot be opened in normal times, but if it is opened during normal driving, it will cause damage to the wheel axle, so it needs to be opened manually at a speed of less than 5KM/h.

You could say that he is not advanced and inhumane.

But!

In the case of the vehicle in a desperate situation, it can be reversed by relying on this thing worth more than two hundred yuan!

It's such a simple and crude thing, but it can greatly improve the Q5's ability to get out of trouble on unpaved roads and even extreme roads!

The two changes to the gearbox and differential lock, coupled with the strong power output of the TDI diesel engine under low torque, Li Fanyu has a bottom in his heart about the off-road performance of the Zhengxin Q5.

This also allows him to explain with peace of mind to the group's marketing department and operation department, and promote the Q5 as "Zhengxin Audi's new generation of all-round sports SUV"!