Analysis of HI4 hybrid technology of Great Wall: two-wheel drive to four-wheel drive, performance experience, energy consumption of two-wheel drive.

Tell a joke and buy a new energy vehicle with joint venture brand. Ten years ago, this joke would have been interpreted differently. However, with the efforts of local brands, local brand new energy vehicles have become the mainstream of the market. Aside from traditional energy products, the sales of new energy vehicles, BYD's performance last year was 654.38+0.86 million, Geely was 328.727, and Chery was 232.8 14. In contrast, Great Wall Motor, which sold only 654.38+0.3/kloc-0.8 million, has fallen far behind its former friends.

It's never too late to mend. The Great Wall has finally made a big move, that is, HI4 hybrid technology. What are the advantages and disadvantages of this system? Can it beat BYD, Geely, Chery and other friends? Let's discuss this problem.

The Great Wall HI4. As the name implies, H(Hybrid) stands for hybrid power, i(intelligent) stands for intelligence, and 4 stands for (4WD) four-wheel drive system. The highlights of this system can be simply summarized in these words: the performance experience of four-wheel drive and the price and energy consumption of two-wheel drive. Then the most important question is: How does the Great Wall HI4 change from two-wheel drive to four-wheel drive without increasing the cost?

In the common two-drive hybrid structure, we take BYD's classic DM-i as an example, and its structure is P1+P3 (what does P1P3 mean? The above picture is for reference). Among them, P 1 motor will not participate in the driving, P3 motor is the driving motor, and if DM-i wants to become a DM-P four-wheel drive structure, it only needs to add another motor to the rear axle, that is, it will become a P 1+P3+P4 structure, and the whole system has three motors.

How did HI4 of Great Wall realize the hybrid four-wheel drive with only two motors? Their engineers really have a lot of ideas. They combined P 1+P3 motors into one motor and changed it into P2 structure. The position of P4 motor remains unchanged, so that the P 1 motor that was not involved in driving before is now merged into P2. It not only participates in driving, but also has the function of recovering kinetic energy to generate electricity. Finally, the hybrid four-wheel drive is realized on the premise that the number of motors remains unchanged.

Compared with the traditional P 1+P3+P4 structure, P2 motor can cut off the connection with the engine when recovering kinetic energy, and will not drive the crankshaft to lose kinetic energy like P0 and P 1. On the other hand, as mentioned above, P2 frame motor is more mature, which can effectively reduce the cost.

It must be said that compared with the previous lemon hybrid, the HI4 of Great Wall is not only as simple as adding a multi-speed transmission, but actually has an innovation in structure. According to the official statement, this HI4 system can realize nine different working modes, and the most efficient range of the engine covers almost all vehicle working conditions. Attached is a form for your reference.

Are there any shortcomings in this system? There are two more intuitive ones. First of all, the vehicle performance is not as good as the traditional 3-motor architecture. The official data of the Great Wall is within 6.4S of 100km (202 1 BYD Tang DM-p has reached 4.3S). Due to the need to reduce costs, manufacturers are likely to carry small-capacity batteries. When high output is needed continuously, the battery is likely to hold back the Great Wall HI4. In addition, it is also a great test in control logic for the Great Wall HI4 to realize so many working modes. In the end, for users, how long this system can make them cool and whether it will produce fuel-saving effect remains to be seen from the products.

From this point of view, the innovation of the Great Wall HI4 mainly focuses on the motor and electronic control. Perhaps this system can really achieve the price of two-wheel drive and the performance of four-wheel drive, thus establishing some technical advantages compared with brands such as BYD, Geely and Chery. For two-wheel drive hybrid vehicles such as BYD headed by DM-i, can motor innovation offset its disadvantages in battery?

Also, the Great Wall HI4 cannot be attributed to the existing models for the time being. Although this system will be installed on A07 Ruge and B07 Snapdragon models, and new models will come out soon. According to the love and messy naming of Great Wall Motor in recent years, it is also a very big problem whether the new model can survive. In this case, wouldn't it be better if Great Wall Motor could tell us when to transfer the technology to the main sales models by the way?

This article comes from the car review of MYAUTO, the author of Easy Car Number. The copyright belongs to the author. Please contact the author for any form of reprint. The content only represents the author's point of view and has nothing to do with the car reform.