This year is the outbreak year of Great Wall Technology. Recently, Jin Shu media have interpreted the advantages of the latest tank platform of the Great Wall, such as expansibility, durability and modularity. This article has been widely discussed on many platforms, which shows that the research and development of the Great Wall in the technical field has attracted the attention of domestic consumers. The day before Guangzhou Auto Show, Great Wall released a new generation powertrain independently developed. So far, the Great Wall has tenable capital in chassis, gearbox and engine.
Why do you say that? Let's briefly talk about the new generation powertrain of the Great Wall with data.
1: The world's first 9DCT gearbox goes offline. This gearbox is the world's first 9-speed wet dual-clutch gearbox. Compared with the 7DCT gearbox, the comprehensive efficiency is increased by 3.5%, the load torque is increased by 54%, the weight is reduced by nearly 10%, and the load-bearing length is shortened by nearly 10%, which means that Great Wall has reached the forefront of the market in the field of dual-clutch gearboxes.
2. The maximum power of off-line code GW4N20 engine can reach 180kW, 385N? M, the thermal efficiency reaches 38.3%, which means that Great Wall Engine is in the same echelon as the joint venture brand in power and fuel economy.
3. Off-line three-in-one electric drive assembly, which integrates motor, controller and reducer, has high system efficiency and compact size, and can be applied to different levels of new energy vehicles, which means that Great Wall has technical support for its future development in the field of pure electric vehicles.
Why did Great Wall develop 9DCT gearbox?
According to common sense, key information comes first. The heavy information of the Great Wall before Guangzhou Auto Show is the world's first 9-speed wet dual clutch off-line.
Great wall tank platform
China's automobile industry started late, but in order to establish its own core technology, most independent brands focus on the research and development of dual-clutch gearboxes, because AT gearbox patents are basically concentrated in the hands of Aisin and ZF, and there are technical barriers, while the core components of CVT gearboxes, such as transmission steel belts, also have technical barriers.
However, the dual clutch gearbox appeared early and applied late, and its principle and structure are basically the same. The underlying technology is not in the hands of a few companies, which is somewhat similar to the "open source" of Android. It is more difficult for independent brands to develop dual-clutch gearboxes. For example, in order to avoid patent barriers, Volkswagen also started from the field of dual-clutch gearboxes.
Why didn't Great Wall purchase gearboxes of other brands, but chose to invest huge sums of money to independently develop 9DCT gearboxes?
In fact, most brands have the behavior of purchasing gearboxes of other brands, including brands with core technologies. But when building a car, you must master your own core technology, and you can't have the idea of "making it is better than buying it". They need to maintain their technological competitiveness, but also be wary of being stuck by suppliers. Especially in the current international society, independent brands must pay special attention to this.
What are the advantages of 9DCT gearbox of Great Wall?
Knowing the above two problems, we can understand why the Great Wall should make efforts in the field of dual-clutch gearboxes. In fact, at present, the 7-speed dual-clutch gearbox is the main one, and the 7-speed wet dual-clutch gearbox is the top product. For example, Audi A6L/Q5L under Volkswagen Group, Volkswagen Huiang and other high-end models all adopt 7-speed wet dual-clutch gearbox, and the 9-speed wet dual-clutch gearbox developed by Great Wall this time can also be simply understood as the strongest in the field of dual-clutch gearbox.
GW4N20 Engine +9DCT Transmission
Specifically, this 9DCT gearbox adopts the built-in integrated TCU (Automatic Transmission Control Unit) technology. Compared with the 7DCT gearbox, the comprehensive efficiency is improved by 3.5%, the load torque is increased by 54%, the weight is reduced by 10%, the bearing length is shortened by 10%, and the fuel consumption per 100 kilometers can be reduced by 7%. Although the improvement of these values does not seem to be great, it is actually commendable that the gearbox field can have such an improvement after such a long period of development.
The significance of these values is that the Great Wall 9DCT gearbox is smaller and will not take up too much space. Low-profile models can also be equipped with this gearbox, while high-profile models can improve the interior space. In addition, the improvement of comprehensive efficiency can make the dynamic response more direct and the fuel consumption per 100 kilometers can also be reduced. A 54% increase in load torque means that it can adapt to high-power engines, such as the 3.0T engine independently developed by Great Wall, and has its own gearbox for adaptation.
There are more possibilities for autonomous gearboxes.
GW4N20 engine +9HDCT transmission
Another advantage of the self-developed gearbox and power system is that it is more convenient to adjust, upgrade, adapt and install ..... because they are all their own technologies. For example, the Great Wall combines 4N20 engine with +9HDCT gearbox to build a hybrid system, which can reduce fuel consumption by 70% compared with 7DCT. In addition, P2 module is matched on the basis of 9DCT gearbox. The motor is placed behind the engine and in front of the gearbox, and the peak power reaches 120kW and the peak torque reaches 330 N m.
The key point is that the control software related to the engine and gearbox of the above powertrain is independently developed by Great Wall, which lays the foundation for the matching and optimization with the power and chassis of automatic driving in the later stage and paves the way for higher-level automatic driving.
Three-in-one motor is beneficial to the development of Euler brand
Through the frequent introduction of new cars by Great Wall Euler this year and the naming and integration of old products, it can be seen that Great Wall will continue to exert its strength in the field of pure electric vehicles, and the three-in-one electric drive assembly that will be off the assembly line this time will improve the models under the Euler brand.
Three-in-one electric drive assembly
Because this assembly integrates motor, controller and reducer, it is more compact than the previous assembly, and has the advantages of low motor noise, high effective specific power and so on. The power range is 35kW—200kW. The cars currently produced by the Euler brand will further enhance its internal space, and higher motor power will also enhance the driving pleasure of the models, which will also help the Euler brand to launch higher-level models in the future.
Jin Shu said:
It should be noted that these technologies have not stayed on paper, but have been off-line production, with a planned annual production capacity of 2.5 million units. It is expected that they will meet with consumers at the end of this year and early next year. Great Wall's new generation powertrain has made Great Wall take another step forward in its core technology. Although the 9DCT gearbox has not been installed and tested, it has already taken the lead in data.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.