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[YesAuto four-wheel drive detailed explanation] SUV has always been the mainstay of Great Wall Motors. Haval, which has become an independent brand, is also getting bigger and bigger. Except for the Haval H4, the numbers 1-9 have been used all over. I believe that many consumers who plan to buy a Chinese brand SUV will first think of Haval. For SUVs, the performance of the four-wheel drive system is one of the important indicators to measure vehicle performance, so today we are mainly talking about the four-wheel drive performance of these representative models under the Haval brand.

Haval H5 four-wheel drive test

Haval H5 2015 2.0T manual four-wheel drive distinguished type

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Manufacturer's guide price

12.58 million

As one of the veterans of the Haval family, Haval H5 has a rich combination of power and drive systems in order to meet the needs of more consumers. The most powerful four-wheel drive model is the four-wheel drive premium model equipped with Eaton differential on the rear axle. This car will also accept today's four-wheel drive performance test as a representative model of Haval H5.

Four-wheel drive structure introduction:

The four-wheel drive structure of the Haval H5 is relatively simple. The center is the transfer case structure commonly seen in hardcore SUVs, with a low-speed four-wheel drive gear, and its transmission ratio is 2:1. There is an open differential between the front axle wheels and there is no inter-wheel limited slip capability. The Eaton self-locking limited-slip differential is equipped between the rear axle and wheels, which is a powerful tool to improve the performance of the Haval H5 four-wheel drive.

The control method of the four-wheel drive system is also not difficult. The three buttons on the center console correspond to the three drive modes. Switching from 2H (rear drive mode) to 4H (high-speed four-wheel drive) needs to be completed at low speed, and if you want to switch to 4L (low-speed four-wheel drive), you need to stop and put in neutral, press the 4L button after depressing the clutch, and wait for a few minutes. After seconds, the system switches to 4L mode.

Four-wheel drive performance:

Power distribution between shafts:

After the Haval H5 is switched to four-wheel drive mode, the transfer case is actually hard-wired. At this time, the power distribution of the front and rear axles is 50:50, so it is easy to deal with the situation of the front and rear axles slipping separately.

Cross axis test:

When facing a cross-axis obstacle with one wheel slipping on the front and rear axles, the Haval H5 switched to the four-wheel drive mode can also pass, but it is not easy at this time, because there is no limited slip capability between the front axle wheels, so all you need to escape Counting on the rear wheels, after the Eaton differential takes effect, the rear wheels can push the vehicle out of trouble to pass the cross-axis obstacles.

Single-round landing test:

If only one front wheel has adhesion, because there is an open differential between the front axle wheels, all the power will be lost from the three slipping wheels, and the vehicle cannot get out of the trap at this time. And if there is only one rear wheel with adhesion, after a period of slippage, the Eaton limited slip differential locks, and the Haval H5 can get out of trouble with the driving force of one rear wheel, but because the Eaton limited slip differential locks suddenly and automatically , The process feels very abrupt and requires the driver to be mentally prepared in advance.

Four-wheel drive advantages of Haval H5:

Because it uses a purely mechanical four-wheel drive system, Haval H5 is very reliable in terms of reliability. In the face of continuous high-intensity off-road conditions, the performance of the four-wheel drive will be relatively more stable. When driving on paved roads, it can also be switched to rear-drive mode to save fuel consumption.

Four-wheel drive disadvantages of Haval H5:

There are three main dissatisfactions. The first is that there is no electronic assistance system that can help improve the performance of the four-wheel drive. The second is that there is an open differential between the front axle and wheels without any limited slip capability. The third is that Eaton’s self-locking limited-slip differential works more suddenly, which makes the power of the rear wheels at the moment of action easily unexpected, which requires the driver to be more vigilant.

Haval H8 four-wheel drive test:

Haval H8 2015 2.0T four-wheel drive luxury

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Manufacturer's guide price

236,800

The Haval H8 is one of the most popular models of the Haval family in recent years. The Haval H8, which has been advertised as a leapfrog luxury SUV, has a four-wheel drive system that is completely different from the Haval H5. Today we are going to test the performance of its four-wheel drive through actual tests.

Four-wheel drive structure introduction:

First, the Haval H8 is completely different from the Haval H5 in the form of four-wheel drive. The four-wheel drive model of the Haval H8 adopts a timely four-wheel drive form. The central transfer mechanism is an electronically controlled multi-disc clutch. The entire four-wheel drive structure is completely automated by the system. control. Under normal circumstances, the vehicle is rear-wheel drive. In the event of slippage, the multi-disc clutch will transmit power to the front axle. Theoretically, a torque distribution of up to 50:50 can be achieved. At the same time, this system also has electronic auxiliary limited slip.

Four-wheel drive performance:

Power distribution between shafts:

There is no difficulty in the test of power distribution between axles for Haval H8. Regardless of whether the two front wheels or the two rear wheels slip, the four-wheel drive system will automatically distribute the power to the axles with adhesion, and the vehicle can easily get out of trouble.

Cross axis test:

The cross-shaft project is also difficult to defeat the Haval H8. After the wheels slip slightly, the electronic assisted limited-slip system restricts the loss of power. There is an adhesive wheel on the front and rear to easily drive the H8 out of the predicament.

Single-round landing test :

The single-wheel landing test was a false alarm. At the beginning, I really thought that the Haval H8 was incapable of getting out of the trap, but about 5 seconds after the skid, the electronic assistance function was quite obvious, and the vehicle was pushed out of the pulley block cleanly. The performance of a front wheel or a rear wheel is similar when it touches the ground. The driver does not need to intervene at all, just hold the throttle and wait for the four-wheel drive system to adjust its working mode.

Four-wheel drive advantages of Haval H8 :

The fully automatic working mode does not require driver intervention, which minimizes the difficulty of driving. And enough to deal with some difficult off-road conditions, the four-wheel drive performance is satisfactory.

Four-wheel drive disadvantages of Haval H8 :

In the extreme state, the reaction speed of the four-wheel drive system is not fast, and the central multi-disc clutch type transfer mechanism may overheat after continuous high-intensity work.

Haval H6 Coupe four-wheel drive test:

Haval H6 Coupe 2015 2.0T manual four-wheel drive premium type

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Manufacturer's guide price

16.98 million

The Haval H6 Coupe is a new model launched at the Shanghai Auto Show in April this year. As a product to seize the market segment, the H6 Coupe is also available in a four-wheel drive version, but for the time being it can only be paired with a manual gearbox, and we have to test it today. How is its four-wheel drive performance.

Four-wheel drive structure introduction:

The four-wheel drive system of the Haval H6 Coupe is also provided by BorgWarner. Its central transfer mechanism is an electronically controlled multi-disc clutch, which is the same as the Haval H8. The four-wheel drive system can automatically adjust the front and rear axles according to the driving situation. Power distribution between the four wheels, while the four wheels with electronic auxiliary limited slip.

Four-wheel drive performance test:

Power distribution between shafts :

There is no difficulty in testing the power distribution between the axles, and the Haval H6 Coupe can easily handle it. The four-wheel drive system reacts relatively quickly to the slip of the single-sided axle, and can quickly distribute the power to the non-slip axle.

Cross axis test:

In the face of the cross-axis challenge, the electronic assisted limited slip of the Haval H6 Coupe is the most critical role, but its performance is not as good as expected. After a long period of slippage, the electronic assistance brakes the wheels calmly. The two wheels with adhesion can push the Haval H6 Coupe out of trouble after the power output is restored, but the whole process is really not neat.

Single-round landing test:

The Haval H6 Coupe, which struggled to pass the cross-axis project, finally stopped at the ultimate test. Regardless of whether it is a front wheel or a rear wheel landing, the power that the wheels with adhesion can get is really limited, which is not enough to drive the body out of trouble, so the two tests of the single-wheel landing Haval H6 Coupe all ended in failure.

Advantages of Haval H6 Coupe four-wheel drive :

The degree of automation is high, and the driver does not need to bother. It can be explained by the cross axis that it can cope with simple non-paved road conditions, and there is no problem with urban use and general outings.

Harvard H6 Coupe four-wheel drive disadvantages :

Electronically assisted limited slip is weaker and slower in response speed, which results in low overall four-wheel drive performance, making it difficult to challenge difficult road conditions.

Haval H9 four-wheel drive test:

Haval H9 2015 2.0T Luxury 7 Seats

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Manufacturer's guide price

249,800

    After launching a large number of SUV products to meet the low-end consumer groups, Haval released the Haval H9 at the end of last year, a product that takes the high-end route thoroughly. It can be said that the Haval H9, which integrates various high-tech configurations in itself, represents The Chinese brand SUV has reached a new level. The Haval H9 is defined by the manufacturer as a “luxury all-terrain off-road vehicle”. With its appearance similar to the Toyota Prado, we have high expectations for its four-wheel drive performance.

Four-wheel drive structure:

From the structural point of view, the four-wheel drive system of Haval H9 can be said to be a version that combines the strengths of the four-wheel drive of Haval H5 and Haval H8, and then further strengthens it. Like the Haval H5, it has a low-speed four-wheel drive mode, and like the Haval H8, it can automatically control the power distribution between the front and rear axles. At the same time, the four wheels have electronic auxiliary limited slip. The so-called enhancement is the installation between the rear axle wheels. A multi-disc clutch type limited slip differential. From the structural point of view, the four-wheel drive system of Haval H9 is better than Haval H5 and Haval H8.

Haval H9 comes with a set of all-terrain feedback system operated by the knob, but only low-speed four-wheel drive and automatic mode are directly related to four-wheel drive control. The automatic mode is used for daily driving. The system will automatically control the power distribution of the front and rear axles, so the driver does not need to worry about it. The low-speed four-wheel drive mode is used in difficult off-road sections.

Four-wheel drive performance:

Power distribution between shafts:

The power distribution test between the front and rear axles is not challenging for the Haval H9. Whether it is the loss of adhesion of the two front wheels or the two rear wheels, there is no difficulty for it, and it can successfully get out of trouble.

Cross axis test:

When faced with cross-axis obstacles, the multi-disc clutch-type limited-slip differential between the rear axle wheels of the Haval H9 played a role. With the assistance of the electronic auxiliary system, the power will be output through the wheels with adhesion to push the body out of the trap.

Single-round landing test:

During the single-wheel landing test, the Haval H9 equipped with a powerful four-wheel drive system was a bit embarrassed. When only one front wheel has adhesion, it can be seen that the three slippery wheels have wasted all the power, and the role of electronic assisted limited slip is not obvious. Only one front wheel cannot make the Haval H9 get out of trouble. But when one rear wheel is shifted and landed on the ground, the powerful rear axle multi-disc clutch limited slip differential once again reflects its own value, and it is quite easy to get out of trouble, and it does not have the abrupt feeling of the Haval H5.

Advantages of Haval H9 four-wheel drive:

The fully automatic mode saves the driver from being distracted by the four-wheel drive system most of the time. Equipped with a limited-slip differential between the rear axle wheels, it is very easy to deal with the slip of the rear wheels.

Disadvantages of Haval H9 four-wheel drive:

The four-wheel drive system, which seems to be more powerful than its fellow brothers, has not been able to bring more powerful performance. In the face of a situation where there is only one front wheel with adhesion, the Haval H9 still cannot get out of the trouble, which is really embarrassing. In addition, the multi-disc clutch limited-slip differential between the rear axle wheels may overheat after a long time of operation, so it is not suitable for continuous high-intensity off-road conditions.

to sum up:

The results of the test are somewhat unexpected. The four-wheel drive performance of the Haval H8 is the best. In the most difficult single-wheel landing test, either a front wheel or a rear wheel can drive the body out of trouble. From the structural point of view, the more powerful Haval H9 failed to achieve the same level. The performance of the Haval H5 is in line with expectations, and its four-wheel drive system is also the most reliable one, but driving it requires more human operations and higher driving skills. (Photo/Zheng Yu from the car home)