Since the official release of the Zhijie S7 at the end of last month, various publicity and tests have been overwhelming.
About HarmonyOS Cockpit and Huawei ADS 20, Huawei has reached the ceiling level of the industry, and this time the Zhijie S7 highlighted the "Tuling intelligent chassis", which is particularly eye-catching.
In the author's memory, the independent models that take "chassis" as the focus of publicity can be traced back to the launch of Qoros 3, the 11th Guangzhou Auto Show exactly ten years ago. However, since then, until the launch of the Zhijie S7, the chassis has long been ignored by independent brands, intentionally or unintentionally.
What is the reason why domestic car companies have died down on the issue of "chassis" since then?There are two main reasons for this.
First of all, the feeling of the "chassis" itself, a large part of which can be felt personally, but it is difficult to accurately describe through words, and it is not easy to quantify. And there are a lot of terms and concepts involved, which are not easy to understand for non-specialists, or if you don't have enough car culture immersion. In particular, there are a bunch of professional concepts and vocabulary such as "push", "understeer", "oversteer", ......Most people don't understand it.
FigThe quality of the chassis is actually very critical to a car, because it is one of the "premium" aspects of the vehicle.
So in the context of that era, it was a thankless task for independent brands to talk about "chassis".
But on the other hand, joint venture brands and imported cars can rely on decades or even centuries of history to endorse, so that consumers can directly understand slogans such as "chassis texture" as "black boxes" - although they can't understand it, they are always very "awesome".
Secondly, the value orientation of Chinese people for automobiles has long pointed to the orientation of "tools". That is, it exists as a travel tool and an identity label, and it is important to be able to use and sufficient, but it is required to look as high-end as possible. Under the above premise, except for a very small number of people who love and play with cars, most people actually don't care much about the driving texture, directionality and so on.
FigThe good "refrigerator color TV sofa" is recognized and followed up by BMW.
In the past, for most people, the benefits of "large front axle roll stiffness" were not as real as "refrigerator color TV sofa".The precise and clear road feeling is not as good as the benefits of adding 100mm to the rear clearance.
However, the perception of the market and the demand of consumers are not stable. In fact, there is a dynamic that changes in the direction of the timeline according to the overall economic situation of the society.
At the end of last month, Huawei broke the taboo of ten years from the main brand without scruples at the Zhijie S7 press conference, and talked about its own chassis technology, which reflects this dynamic after the baptism of time, and reached a new stage.
In-depth understanding of the Turing intelligent chassis
The power system of the Zhijie S7 is based on the new generation of Huawei DriveOne 800V silicon carbide high-voltage power platform, and is equipped with the new Huawei "Giant Whale" 800V high-voltage battery system. The battery system is the first horizontal high-voltage box, with a highly integrated minimalist circuit design, with a thickness of only 117mm, which is the thinnest 800V high-voltage battery in the industry, providing users with more cabin space.
A 150kw AC asynchronous motor is installed on the front axle, matched with a set of virtual kingpin double-wishbone cantileverThe rear axle is equipped with a 215kW permanent magnet synchronous motor with a five-link independent cantilever. Both the front and rear axles are equipped with gas springs.
365kw total motor power, 98% of the highest efficiency motor, with 0The ultra-low wind resistance of 203CD makes the 000 acceleration of the Zhijie S7 only 33 seconds, successfully entered the ranks of the "3 second club".
Although he runs fast, he can also brake. With the perfect combination of IPB intelligent integrated braking system and Brembo high-performance calipers, combined with the industry's first FNC perforated brake disc and the blessing of high-performance tires, the "1000" braking distance of Zhijie S7 is only 335 meters.
The low center of gravity design, the efficient cantilever support brought by the air suspension, and the precise steering control have made the "elk" score of the Zhijie S7 reach an astonishing 831km/h。
Speaking of this, some people may be tempted to ask - are you here to repeat the content of the press conference and "report the name of the dish"?"Elk" results, braking distance, these are not enough, zero hundred 3The acceleration capability in 3 seconds, and even the Huawei DriveOne 800V silicon carbide high-voltage power platform, Huawei's "Giant Whale" battery, are these related to the "Tuling Intelligent Chassis"?
Strong power only determines the basic acceleration experience, and a really good handling experience depends more on the performance of the chassis. Therefore, if many of the above numbers have real meaning, then they must rely on the existence of the "Turing Intelligent Chassis".
Let's get to the point - what exactly is the "Turing Intelligent Chassis"?The official standard formulation of the intellectual community is this:
Huawei's self-developed intelligent chassis technology, based on the Huawei iDVP intelligent vehicle digital platform, is equipped with a multi-modal fusion perception system, HUAWEI DATS dynamic adaptive torque system, and HUAWEI XMOTION intelligent body collaborative control system.
Compared with the traditional chassis, especially the German kind that is famous for the chassis, relying on the operation of stacking hardware and working tuning, the advantage of "Tuling Intelligent Chassis" is that it not only uses top-level hardware and master-level tuning, but also realizes the digitalization and intelligence of the chassis.
Compared with those competing products, whether it is a traditional fuel vehicle or an opponent in the new energy track, the advantage of "Tuling Intelligent Chassis" lies in the ultimate control of the whole domain and all temporal states of the vehicle - intelligent perception, intelligent control, and intelligent response. In short, this time the chassis of the car has a brain that can think and respond actively.
Only an intelligent and cerebral chassis can ensure that the vehicle adopts the optimal strategy at any time in the face of various unexpected situations on the rapidly changing road, so as to provide drivers with an easy-to-operate, safer and more comfortable driving experience.
Now let's end the empty narrative and introduce the two tricks of the "Turing Intelligent Chassis" that can shake the industry
First of all, there is the ability to preview the road. The camera and lidar of the intelligent driving system can scan the road conditions within 150 meters in front of the vehicle in real time, and once it detects that there are obvious ups and downs on the ground in front of it, such as speed bumps, etc., the system can activate the CDC function according to the real-time determined road conditions, and can adjust the damping of the shock absorber up to 100 times per second.
When you have the opportunity to drive the Zhijie S7 through the speed bump at a fast speed, you will find that although the wheels will inevitably rise and fall, the road conditions can still be clearly perceived by the driver, but the body can basically maintain a relatively stable trajectory, and the passenger will definitely not be bounced up from the seat cushion because of the sudden ups and downs. Because most of the vibrations are sensed by the system in advance, they are accurately resolved through CDC electromagnetic adjustment.
Comfort is a major feature of the "Turing Intelligent Chassis". But in addition to comfort, it also offers better security.
As we all know, the fast response ability of the motor is one of the biggest advantages of electric vehicles. The configuration of dual motors on the front and rear axles also makes it easy for the vehicle to output different power to the front and rear wheels to achieve more accurate torque control of the front and rear wheels.
This means that when the Zhijie S7 needs to turn, once there may be a "push head" or "tail flicking" problem, the system can detect the abnormality through the sensor for the first time, and respond to the current abnormal vehicle attitude of the vehicle through torque vectoring adjustment within the millisecond response time, and correct the yaw by redistributing the torque of the front and rear wheels, so that the body can recover stability faster.
According to official data, in the same environment, the skidding amplitude of the Zhijie S7 can be reduced by 35% compared with ordinary vehicles, the impact degree can be reduced by 30%, and the risk of tail flicking is reduced by about 25%.
In other words, HUAWEI DATS not only ensures the safety of the Zhijie S7 on various slippery roads, but also gives it the ability to turn faster than ordinary vehicles. At the same time, the negative experience such as "jumping feeling", which has been plaguing electric vehicles, has also been fundamentally solved.
Finally, as a "brainy" intelligent chassis that can be adaptive, with the blessing of the air spring system, the chassis height can also be adaptive according to the vehicle speed.
On the basis of the standard 180mm chassis ground clearance, Zhijie S7 can flexibly adjust the chassis height by sensing the speed, and can take into account stability and passability in the standard state.
When the speed reaches 110 km/h, the chassis is automatically lowered by 10 mm to improve stability. When the speed is increased to 150km/h, it will be lowered by 20mm to improve the grip of the body and ensure that the body does not flutter at high speeds.
At the same time, the ground clearance of Zhijie S7 also supports manual adjustment of 30mm to reach a maximum of 220mm to obtain better passability of the sedan.
Penetrate the last barrier of a century-old car company
Chassis tuning, written in English as tuning, refers to the performance of the suspension by adjusting the damping of the shock absorber, the soft and hard of the spring and the maximum stroke, the hinged position of the stabilizer bar and the frame, the fixed point, the maximum steering parameters of the tire, etc., on the basis of the original design of the vehicle chassis structure, so as to achieve different handling stability, comfort and smoothness requirements.
For a long time, the chassis and its tuning, together with the engine and gearbox, constituted the top enterprises in first-mover countries such as Germany, and the high walls and deep barriers in technology in late-developing countries such as China. In today's era of comprehensive new energy vehicles, the barriers between engines and gearboxes have been gradually shattered with the rise of electric vehicles. But the chassis is still the trump card firmly held by German car companies.
FigTo this day, when it comes to German cars, the words "solid chassis" are labels that do not need to be deliberately emphasized.
In recent years, with the rise of new energy vehicles, intelligent driving and intelligent cockpit have become popular, and at the same time, many strange theories have also been born. There is a widely circulated opinion that since cars have developed into the era of "new four modernizations", car companies are still tossing a chassis and picking out the handling performanceIn the new era, machinery is not important, and the car only needs to focus on the development of "intelligent cabin driving".
This logic is exactly the kind of logic that seems reasonable, but in fact it is absurd. Because the essence of the car is still an extension of the human legs, it is an important means of transportation, and it cannot completely get rid of the human driver in the foreseeable time. So as long as the car has to be driven by humans, the importance of the chassis can never be ignored.
In the past, independent brands would avoid talking about chassis because this piece did have solid technical barriers, and the overall market atmosphere did not give independent brands this opportunity. As for now, the intellectual world began to talk about the chassis, on the one hand, because of the real market needs, and on the other hand, because we have this strength.
FigChassis tuning used to be a "miraculous skill" for Chinese people
In the era of pure mechanics, since the parameters of the springs and shock absorbers are fixed at the factory, the handling feeling of a car is also fixed. In this case, how to adjust and make trade-offs in terms of handling and comfort is the so-called barrier.
The reason why BBA can achieve such a high level in the industry is that BMW, which focuses on sports, can ensure precise direction, excellent road feeling and excellent handling while ensuring the minimum ride comfort. Mercedes-Benz, which also focuses on luxury, relies on its excellent tuning to bring the driving experience to the driver.
The so-called chassis tuning is how to make a car operate as accurately as the driver wants, and its ingenuity can be described as "the use of wonder, in one mind", belongs to the professional field of professionals know-how. However, in this era of intelligence, the birth of electronic control and electric drive enables new energy vehicles to provide a unique way for Chinese companies to catch up and surpass in addition to traditional engines and gearboxes, even in the field of chassis.
After entering the 80s of the last century, the era of automobiles began to be electronic. The advent of CDC and gas springs, as well as the digitalization of all-wheel drive systems, have enabled a new generation of combustion vehicles that have upgraded their electrical and electronic architecture to use CDC to improve the comfort experience on washboards, as well as to enhance driving safety on low-damping roads by adjusting the torque of the front and rear wheels.
However, for traditional automobiles, and even most of the current new energy vehicles, the internal data interaction of the vehicle is still based on the controller LAN bus (CAN) and the local mutual line (LIN). Security and reliability are unquestionable, but bandwidth has long been unavailable. In particular, a new generation of smart cars such as the Zhijie S7, which has an advanced chassis with multi-domain joint control, will continue to use CAN to transmit Huawei ADS20 pavement data, to the Huawei XMoMotion collaborative control CDC work, 100% data congestion will occur.
To this end, Huawei has developed a dedicated Ethernet ring network for vehicles to process data from various sensors. Keep your system safe while maintaining speed and reducing latency.
The significance of the high-speed ethernet ring car is, to some extent, like the myelin sheath of the nervous system evolved for the first time in the history of biological evolution. Thanks to the exponential increase in the communication data bandwidth in the car, the Zhijie S7 has become the world's first fully serviced E E electronic and electrical architecture smart car based on the SDV standard.
It is also with the blessing of the powerful intelligent architecture that the "Tuling Intelligent Chassis" realizes the all-round perception of road conditions and driving conditions, and at the same time relies on low-latency transmission, powerful computing power and advanced algorithms for intelligent decision-making and control, achieving a three-fold increase in the number of co-control devices compared with the traditional chassis, which is the most intelligent digital chassis so far.
There is no doubt that Huawei's strong technical capabilities in the ICT field are the key to the emergence of the Zhijie S7 and the "Tuling Intelligent Chassis" in this era. With digital technology, it broke through the solid barriers of German century-old accumulation and casting in one fell swoop. However, this does not mean that Huawei or Zhijie do not have the strength of chassis mechanical tuning.
However, when it comes to this, we have to mention Huawei's chassis team. Don't think that Huawei will only engage in "corner overtaking" or "lane change overtaking", and launching a "frontal attack" against the industry's peak technology is also what it is good at.
Ever since Huawei decided to get involved in the automotive industry, it has been trying to recruit chassis-related talents from all over the world. In recent years, it has not only established a German research institute to recruit global talents to form a chassis team in the "hometown" of automobiles, but also developed and cultivated chassis talents in China.
At present, Huawei has a large number of professional teams from various countries, including chassis experts from Germany, Italy, and the United Kingdom, as well as a considerable number of local talents. Among them, many of them have worked for Lamborghini, Mercedes-Benz, BMW, Bosch and other top car companies in the industry, and participated in the chassis tuning engineering of well-known luxury models such as Mercedes-Benz S-Class Maybach, BMW 5 Series and 7 Series, Lamborghini's Hurracan, Sterrato and Revuelto.
FigYes, Huawei also know-how
It is the team from this institution that undertook the important task of tuning the Tuling intelligent chassis for the Zhijie S7, and with its excellent performance, it consolidated the "base" of the Zhijie S7 in terms of machinery. With well-deserved master tuning, the driving quality and ride comfort of Zhijie S7 have reached a new height of domestic cars.
As early as 2021, after the 19th Shanghai International Expo, the author and a group of peers reached an agreement when discussing the trend of new energy in automobiles
The wave of smart cars sweeping the industry has begun to reshape the ecology of upstream parts (at that time), and sooner or later it will also sweep into the chassis field, the last technical barrier of traditional fuel vehicles.
The advent of the era of smart electric vehicles has completely subverted the rules of the game in the automotive industry
The engine in the traditional three parts has collapsed with the rise of pure electric models. Although there is still a place for the engine in the hybrid model, its position has been significantly weakened.
As for the gearbox problem that has plagued Chinese car companies for more than 20 years, it is also self-defeating in the era of electric motors.
As for the chassis, the technical accumulation of traditional car companies in the chassis, especially the barriers accumulated by the German system in the past hundred years, although there will be a moment of collapse, but with the cognition at that time, it is generally believed that it may take about five years from the node where this subversion occurs.
FigChina *** keep going!
Judging from the current results, it is indeed a little too conservative. The emergence of the Tuling intelligent chassis is precisely with the blessing of electrification and intelligence, and Chinese enterprises have achieved the last bit of pride in traditional car companies "lane change overtaking".