Under the framework of the original definition of a car, it was difficult for the Chinese auto industry to build an engine and gearbox well, and it was difficult to sell a car at a good price.
Missed the first and middle stages of development, it is indeed difficult to catch up with the leaders of Europe, America, Japan and South Korea in this regard. So basically, the independent brand manufacturers you can name are insisting on independent research and development, and at the same time, they are also using the ** chain or joint venture partners of automobile globalization to fill the weakness in this regard.
At that time, when I opened the hood of a self-owned brand car, there was at least a ZF or Aisin gearbox hidden underneath. This is all competitive, and even the engine may be Mitsubishi's.
The so-called "autonomy" can only be based on the premise that the technology is controllable and the product is controllable. In addition to trying to overtake in corners on the new energy track, there are still some independent brands that are trying to catch up on the straights.
For example, Chery has completed the self-development, verification, mass production and implementation of the 8AT gearbox, named Fuzhen Power FA840 transmission, and won the honor of the world's top ten transmissions. That's where we talk.
In fact, while new energy and intelligent technology are advancing rapidly, the development of engine technology has not stagnated, but has a tendency to accelerate progress. Thermal efficiency is at a rate of almost 1 percentage point per year.
From the perspective of fuel consumption of the whole vehicle, it is not enough to improve the thermal efficiency of the engine, but also need a gearbox with more gears to adjust the speed and torque, so as to keep the engine running in the efficient range as much as possible and improve the level of fuel economy. Compared with the CVT of continuously variable transmission, compared with the 4AT and 6AT transmissions, which are also AT transmissions, the 8AT transmission is superior in terms of matching, energy saving level, reliability, and shift smoothness.
This is also the reason why Chery chose 8AT for a breakthrough.
For transverse 8AT gearboxes, the layout should be considered first and foremost in the design. Fuzhen Power FA840 only uses two sets of planetary rows (one of which is a Ravena planetary gear set, and the other group is a single-row two-stage planetary gear train), and the arrangement of 8 gears has been completed, and the overall structure is more compact after the reuse rate of the planetary mechanism is improved. The weight of the whole box is 3-5kg lighter than that of the imported 8AT gearbox of the same level.
In addition to being able to adapt to the size of the engine compartment of more class models, the lower dead weight can also reduce the fuel consumption level of the whole vehicle.
In terms of specific components, Fuzhen Power FA840 adopts the latest generation of FCC friction plate material and the design of toothed oil pump rotor. In addition to maintaining high efficiency at low temperatures, the drag torque can be reduced by up to 50-70%. To further reduce the power loss of the engine output, the power is transmitted to the output end of the gearbox as much as possible, and the final drive is transmitted to the mechanical efficiency of up to 96%.
In addition to size and weight, Fuzhen Power FA840 also has excellent performance in terms of speed ratio range and torque.
The ratio range represents the range of speeds that can be allowed in a gearbox. The speed ratio range is too small, and the gears are too dense, which cannot play the role of multi-gear gearbox to improve economy. Fuzhen Power FA840 gearbox ratio range is 78. The energy-saving effect will be more excellent, and the power will be more direct in the initial stage.
In recent years, the engine power performance has been rising, and it is also forcing a breakthrough in transmission performance. Chery Kunpeng Power 2The maximum torque of the 0TGDI engine has reached 400N·m, which cannot be carried by ordinary 8AT gearbox.
In contrast, the FA840 gearbox of Fuzhen Power can fully play the power advantages of the Kunpeng Power engine. Its maximum torque from the input shaft is 440Nm, and the theoretical torque to the wheel end is up to 7690Nm, combined with 7The speed ratio range of 8 can significantly improve the driving experience.
In terms of reliability, Chery, whose products are going abroad, is more aware of the impact of climate and road conditions in different countries and regions on the powertrain. In the testing phase alone, Chery prepared 17 test benches for this 8AT gearbox, and simultaneously carried out 25 tests on the performance and durability of the individual gearbox. At the same time, it is equipped with more than 200+ experimental vehicles, with a cumulative verification mileage of more than 4 million+ kilometers, covering multiple working conditions and all regions at home and abroad. The software has also received the highest level of safety certificate from DNV.
Such a high level of reliability verification is only to ensure that consumers around the world can enjoy a consistent power experience.
In general, at the turn of the new energy era and the era of fuel vehicles, fuel vehicles are still at the core in the vast land of China and in the broader overseas market. Proudly, independent brands that go abroad need to be independent and controllable, without the trouble of running out of stock, lower procurement costs, and a power combination with stronger performance. Chery's ** power combination, represented by the Kunpeng power engine and 8AT gearbox, was born at the right time. This pair of first-class power combinations is also taking advantage of Chery's platform-based car manufacturing capabilities to quickly complete the implementation of new cars of different levels and go global.
Today, when you see a Tiggo 8 Pro Champion Edition on the street, you may not notice that the car waiting for the traffic light is loaded with a power combination whose intellectual property is completely controlled by its own brand, and it is ready to go. And this symbolizes a legend of Chinese car brands catching up on the straights.