This is another scientific and technological achievement developed by BYD after patented technologies such as DM hybrid, e-platform, blade battery, CTB, Easy Sifang, etc. This technology has broken the long-standing technical barrier of China brand, filled the technical gap in this field in China, and made the active body control system no longer the exclusive configuration of overseas luxury brands. It can be said that the emergence of Yun Qi has far-reaching significance for China automobile market.
Yun Qi system is an intelligent body control system developed by BYD, including Yun Qi -C intelligent damping body control system, Yun Qi -A intelligent air body control system and Yun Qi -P intelligent hydraulic body control system, and more technical product series will be launched in the future. It is reported that the system will take the lead in looking up to U8, Tengshi N7, Korean EV and other models.
Yun Qi intelligent body control system consists of Yun Qi intelligent detection architecture, Yun Qi intelligent computing center, Yun Qi intelligent control technology and key components. Among them, the intelligent detection architecture of the cloud chariot can be perceived from five dimensions, such as driving behavior, body, road surface, cloud data and system, through more than 50 sensors of the whole vehicle, and combined with the steering wheel, accelerator/brake pedal, single/binocular camera, laser radar and other components to provide sensing data, so as to realize multi-system linkage control and improve the driving experience.
Wang Chuanfu, chairman and president of BYD, said that in terms of safety, thanks to the application of cloud technology, the overall safety of vehicles will be further improved. In the most extreme case, even if one wheel is lost, the vehicle can still keep running smoothly! ?
The cloud chariot system will integrate a single function through technology.
Yun Qi Intelligent Computing Center can be regarded as the "central nerve" of the whole system. Independently developed by BYD, it has multi-core high-performance processing capability and supports various communication and signal interfaces. To put it simply, Yun Qi Intelligent Computing Center can retrieve all the sensor data such as the external camera of the vehicle, and calculate the vehicle attitude and wheel load through the self-developed cloud algorithm, thus presenting the best control strategy in real time.
The intelligent control technology of cloud chariot includes ontology control, collaborative control and interactive control. Among them, the body control technology includes height, stiffness, damping, main power control and so on. The function can be adapted according to the performance of different vehicles and different usage scenarios to meet the different usage needs of users.
Collaborative control technology will focus on improving the pitching comfort and lateral stability of the car body. In the future, this technology will be integrated with ADAS to provide high-order intelligent driving.
Interactive control technology is based on BYD OS, covering multi-application mode, innovative function, multi-terminal intelligent interaction and OTA upgrade.
At the event site, BYD officially released Yun Qi -C intelligent damping body control system, Yun Qi -A intelligent air body control system and Yun Qi -P intelligent hydraulic body control system. These three technologies can be covered according to the characteristics of BYD brands.
Yun Qi -C intelligent damping body control system will be applied to BYD Dynasty and Ocean Series, Yun Qi -A intelligent air body control system will be applied to Tengshi brand, and Yun Qi -P intelligent hydraulic body control system will be applied to Wangwang brand.
Xiao Yun -C- Soft and hard adjustable electromagnetic suspension is actually quite common.
Yun Qi -C intelligent damping car body control system can adjust the damping of shock absorber by electronically controlled valve, which can realize stepless adaptive adjustment of damping. The system can receive thousands of signals per second, and the damping of the shock absorber can be quickly adjusted by Yun Qi Intelligent Computing Center.
When the vehicle passes through the bumpy road, the comfort of high frequency and small damping is used to control the frequency. When the vehicle speed is 60 km/h, the vibration isolation rate of Yun Qi -C can reach 96%.
When the vehicle turns, accelerates and brakes quickly, the control frequency with low frequency and large damping is adopted to improve the support force of the suspension, which can restrain the roll and pitch and improve the comfort in the car. Similarly, Yun Qi -C can help reduce the vehicle roll angular velocity by 39.7% under the condition of double lane change at speed 100km/h (what we often call elk test).
The working principle of the Yun Qi -C is very similar to that of the models that use CDC suspension in the automobile market at present, but you should know that the Yun Qi -C is independently developed by BYD. It won't take long for this technology to appear on BYD Korean EV, and it will also appear on BYD Tang, Tengshi and other models one after another.
Cloud-single/multi-cavity suspension+road feeling
Yun Qi-Intelligent air control system can control air spring intake and exhaust, stiffness conversion valve, shock absorber solenoid valve and so on. The dynamic adjustment of body control is realized by Yun Qi Intelligent Computing Center, and different suspension adjustment stroke and stiffness schemes can be adapted according to different vehicle types, in which the suspension adjustment stroke can reach 150mm, providing multiple functional modes of 10, and the active adjustment of suspension height can be realized.
When the vehicle is accelerating or braking, Yun Qi -A can automatically trigger multi-level stiffness adjustment, which can improve the anti-pitching ability of the vehicle by more than 25%. When the vehicle turns at high speed, the roll angle speed can be reduced by 23%. In addition, vehicles equipped with Yun Qi -A will check the body state thousands of times per second. When encountering continuous speed bumps and continuous potholes, they will automatically soften the suspension and keep the body stable.
It is worth noting that another major feature of this system is the intelligent wing seat. The seat and air suspension are designed with * * * air equalizing circuit, and the air volume is intelligently distributed with the vehicle speed, so the response speed is very fast. When the vehicle turns a corner at high speed, the posture of the car body changes and turns, and the system will automatically sense and control the inflation of the seat wing, so as to realize the adaptive adjustment of the lumbar support and keep the car body in a good driving posture all the time. ?
In recent years, many new cars of China brand have used air suspension, and BYD even played tricks, which brought Yunnian -A to consumers. Different from our common ones, this is a complete set of active air suspension, which can intelligently adjust the height of the vehicle during driving, including ultra-high lift, speed adjustment (the body automatically lowers when driving at high speed), intelligent welcome and loading mode (the body automatically lowers when loading and unloading items in the trunk).
It is understood that Yun Qi -A will be the first to appear on Tengshi N7. According to the information obtained so far, Tengshi N7 adopts single-cavity suspension, and Yun Qi -A series will also have double-cavity and multi-cavity suspension in the future.
Yunnian -P —— An off-road weapon with four suspension and independent adjustment.
Yun Qi -P intelligent hydraulic body control system is more complicated than just introduced. In addition to the intelligent computing center and front and rear shock absorbers, many control modules have been added, such as continuous damping control module, multi-stage stiffness control module, attitude control module, four-wheel linkage module, suspension electric pump module, suspension control accumulator and multi-stage buffer accumulator. It is a body control system integrating three core technologies: mechanical, hydraulic and electronic control.
With the blessing of these functions, the performance is more powerful, and the vehicle can easily cope with more complex off-road environments. The adjustment stroke of the suspension can reach 200mm, which can not only realize four-wheel synchronous lifting ability, but also realize one-wheel independent lifting.
Under extreme conditions, such as when the vehicle falls off a steep slope in high-intensity off-road, it can trigger the three-level stiffness urgently, effectively reducing the impact load by 50%, and making the passengers in the car more comfortable.
It is worth noting that Yun Qi -P can also achieve two unique functions, namely four-wheel linkage and camping leveling.
Four-wheel linkage is the function of four-wheel linkage, which can transport oil for the suspended wheel shock absorber, prolong the suspension stroke, improve the contact between the wheel and the ground and the sense of balance of the vehicle, and ensure the effective output of four-wheel power.
This function can make the maximum wheel difference of the vehicle reach 620mm, and the RTI value of the whole vehicle on the ramp can reach above 600. The RTI index of 600 is not large for off-road vehicles with hard axle and non-independent suspension, but it is also quite powerful for Yun Qi -P four-wheel independent suspension vehicles.
The function of camping leveling is to make the car body vertical to the plane in the direction of gravity by adjusting the height of the single wheel at rest, so as to reach the level inside the car. In other words, when camping in the wild, you don't have to level the ground, just turn on the camping leveling button to keep the car level!
Yun Qi -P intelligent hydraulic body control system will be installed on U8 and F brands. With the opening of Shanghai Auto Show, I believe this consumer will soon be attracted by the unique charm of U8!
Will dance and look up at U9.
At the end of the conference, BYD also brought a small egg-Yun Qi -X, as the flagship model of the cloud chariot system, which will be mounted on the super-running model Lookup U9.
Yun Qi -X integrates the technical essence of three C/A/P systems, and can use binocular cameras or lidar to identify the road undulations ahead, and actively adjust the suspension system status in anticipation. The car seems to have realized the function of "watching the road", which can control the body dynamics more actively and intelligently.
At the scene, a car carrying Yunnian -X made a magnificent appearance with the rhythm of music. At the climax of the music, it even has a four-wheel vertical bounce off the ground. Although the official did not explain the specific principle, such an exaggerated "Sao operation" did show Yunnian -X's powerful chassis adjustment ability and four-wheel suspension control ability!
It is worth noting that Yun Qi system is not the first core technology independently developed by BYD. According to relevant information, BYD has invested 1000 billion in R&D in the past 20 years, with a team of 69,000 people and 28,000 patents authorized. The cloud system released this time is another scientific and technological achievement independently developed by BYD after key technologies such as DM hybrid, e-platform, blade battery, CTB, and Easy Sifang!
1995 BYD brand has been founded for 27 years, and now BYD has become one of the top 500 in the world. BYD can be said to be the first batch of domestic car companies to enter the field of new energy vehicles. Over the years, we have made great achievements in the fields of batteries, motors, electronic control and even logo chips of new energy vehicles.
In 2020, BYD introduced the blade battery. Compared with the traditional lithium iron phosphate battery, the blade battery has the advantages of long life and long battery life. At the same time, the blade battery also passed the "acupuncture test", which also means extremely high safety performance.
CTB battery car body integration technology is based on the design concept of "battery car body integration", which integrates the blade battery with the car body to realize the annular car body structure, which not only balances the center of gravity of the whole car, but also greatly improves the strength of the whole car. CTB technology is also combined with the rectangular structure of blade battery, which leads to the "honeycomb aluminum" structure, which brings great innovation in battery grouping technology.
"Easy Sifang" released not long ago is the first mass-produced four-motor drive technology in China. Through the four-motor independent vector control technology, the body posture can be better controlled and better safety can be provided for users. Unlike Wei Xiaoli who likes to promote PPT, BYD has always been very low-key in the layout of major technologies. Even on the eve of the introduction of the intelligent body control system in Yun Qi, many people didn't know what Yun Qi was.
It is undeniable that BYD has reached unprecedented heights in the three technical fields of battery, electric drive and electronic control through years of technical research and development. In addition to excellent sales performance, it has also attracted international veteran car companies such as Toyota and Daimler to cooperate with them in the field of new energy.
Not long ago, at BYD's performance conference, Wang Chuanfu made an admirable statement.
This article comes from a report by 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.