What is the difference between Yunqi system and standard luxury suspension system？

When I looked up at U9 and walked out of the stage in a dancing posture, I knew it was unusual. On April 10th, BYD released the cloud chariot system for new energy vehicles, which was specially created for new energy vehicles to improve driving quality. Among them, there are four sets of body control systems with different characteristics, including Yunqi -C, Yunqi -A, Yunqi -P and Yunqi -X, and different systems will be set for different models.

In terms of interpretation, the term "chariot" means a multi-person assisted push cart, which describes the state of the emperor’s trip in that year. However, in BYD’s technical system, Yunchariot represents different functional contents under the same platform structure, so it has different classifications. This setting is similar to luxury brands that pay attention to driving, such as Mercedes-Benz magic carpet, Audi’s intelligent attitude stabilization system, Land Rover all-terrain feedback system and Porsche PDCC system. Today, I will share their differences with you.

In the new energy era, vehicles will pay more attention to the functional applications such as three-electric technology and assisted driving, and the demand point for driving itself will become weaker. Therefore, for vehicles with higher overall load than traditional fuel, efforts in body control system are the place to open the gap between brands.

Pure electric vehicles can better achieve the 50:50 gold counterweight because the batteries are evenly distributed at the bottom of the vehicle. However, due to the high quality of the overall equipment, the inertia generated during driving will be greater, and the requirements for suspension damping will be higher. At the same time, according to the characteristics of different vehicles, the differences in control systems also make the vehicles have different performances.

The four systems have special targeted uses.

First of all, Yunxiao -C, which can be simply considered as a suspension system with variable damping adjustment, can adjust the hardness and damping effect of the suspension according to the feedback of road conditions by means of electronic dampers. This system is relatively rudimentary, and many models with torsion beam dependent suspensions will have similar systems to adjust the comfort of the suspension. At present, BYD Han is equipped with it, which can provide better damping effect.

Yunqi -A adds an air suspension, which can realize the soft and hard adjustment of the suspension and adjust it according to the actual demand, which is also the common point of air suspension. However, one thing is special. In the process of high-speed steering, an airbag is added to the flank positions on both sides of the bucket seat, which can be inflated according to the change of speed and steering angle, so that passengers can effectively offset the lateral thrust during the shift of center of gravity, and the direct effect is to make passengers sit on the seat more stably.

The cloud chariot -P is set for looking up to the U8 hard-core SUV. It is mainly divided into three contents, the first is the adjustment range of up and down height of 200mm, which makes the vehicle have stronger passability. Secondly, it is able to have stronger compression resistance and cushion the specific impact caused by the height difference. Finally, the most important thing is to have a longer suspension stroke, which can make it closer to the road surface when passing through the undulating road surface to avoid suspension. At the same time, it can realize the dynamic balance of the vehicle by four-wheel linkage and achieve the same height of the four wheels.

Finally, it is the strongest cloud -X, just like looking up at U9 at the beginning. As a super-running model, more attention is paid to handling, especially in high-speed dynamic driving texture. The active anti-roll bar can be adjusted moderately by combining with the road surface perception software, so that the included angle between the vehicle and the ground can be tracked more perfectly and the vehicle can be driven closer to the ground.

As mentioned above, Yunqi system can adjust different driving dynamics around cars, SUVs and even sports cars. It is targeted and differentiated, and it can be adjusted and adapted according to the driving conditions of different models. What are the differences from the familiar Mercedes-Benz magic carpet, Audi intelligent attitude stabilization system, Land Rover all-terrain feedback system and Porsche PDCC system? What I have concluded is that, on the one hand, the hardware is diversified and has different configurations according to different models, and it will not go all over the world like other systems. On the other hand, according to the computing power of the cloud, we can combine the road conditions and the data collected by the algorithm to simulate the suspension damping effect that changes according to driving habits. This is a process of continuous learning and optimization.

Say, where are the system characteristics of other brands?

First of all, the magic carpet of Mercedes-Benz is called the magic body control system. Through the "road scanning camera" located at the windshield, the road conditions within 15 meters in front of the vehicle and above 3 mm in ground height can be pre-scanned. When the road surface in front is monitored to be undulating, the magic body control system will automatically change the hydraulic oil quantity of the hydraulic tappet in suspension, and at the same time, it will be integrated with many sensors, calculation actuators and air suspension.

The core of this is predictability, which can perceive the road condition in advance and adjust it, instead of passively reacting when the vehicle drives to the corresponding road section. This configuration is unique to luxury models on Mercedes-Benz S-Class models.

Audi’s intelligent attitude stabilization system, as its name implies, can provide a more stable body driving posture. This system can increase or decrease the load of each wheel through the motor according to the road condition, so it can actively adjust the chassis position no matter what driving situation. In comfort+mode, the intelligent attitude stabilization system can use the tilting function when driving in corners, and can adjust the body posture to reduce the lateral acceleration of passengers.

When entering the curve, the intelligent attitude stabilization system will raise the car body on the outside of the curve and lower the car body on the other side, so that the deviation between the vehicle and the curve is controlled within 3. When driving in a straight line, the intelligent attitude stabilization system can provide buffer compensation for the pitching motion of the chassis, which makes the car body more trackable during driving.

In the field of cars, what Yunqi -C and Yunqi -A have in common with Mercedes-Benz magic carpet and Audi intelligent posture stabilization is that they can adjust the damping adaptively to improve the comfort, but Mercedes-Benz has better foresight and can simulate the road conditions in advance, which Yunqi can’t compare with.

Compared with Audi’s intelligent posture stabilization, Yunqi did not adjust the posture of the whole vehicle, but only simulated the corresponding feelings on the seat, which is a fundamental difference. After all, it has nothing to do with the dynamics of the whole vehicle.

In addition, for luxury models, Land Rover ATF system needs to manually select the corresponding mode system for proper allocation. The changes are the response speed of the engine, the acceleration slip regulation and the difference of the dynamic stability system of the car body, which can have more obvious effects on fuel vehicles.

However, compared with BYD’s Yunqi -P, it is developed around new energy vehicles, which can achieve a more accurate ratio of power output and four-wheel independent operation, which perfectly solves the problem that pure electric vehicles have no mechanical differential, can achieve four-wheel different speed differences, and has better effects on the ability to get rid of difficulties and the adjustment of suspension stroke.

Finally, Porsche’s PDCC, whose core is the active anti-roll bar, can actively adjust the speed between different wheels when cornering, improve the grip of the inner wheel, and compensate for the difference, so that the vehicle has better tracking performance during cornering, and will not be out of control because of the influence of speed and corner angle, thus restraining the roll and improving the cornering speed.

From this technical point of view, BYD’s Yunqi -X system imitates such functionality, which can monitor the dynamics of wheels from time to time. At the same time, it is more evolved than Porsche PDCC in that it is equipped with a laser radar and can realize four-wheel independent operation at the same time. This is the reason for the frog jump.

Conclusion:

The different module functions of the cloud-chariot system can be used for different vehicles and different scenes, which can be said to be very targeted. Compared with the system provided by luxury brands to improve driving quality, it is very similar in functional attributes and effects, and the only difference is that it is aimed at new energy vehicles.

The value of luxury brands lies in providing luxury experience and more comfortable riding experience, which is the ultimate goal of all research and development of advanced suspension systems. However, Yunqi has mastered the core contents of luxury brands at present, and at the same time, it can be said that the innovation in the field of new energy is more advanced.

When others are still thinking about how to improve their sense of science and technology, BYD still returns to the original point and focuses on the driving quality itself. This consideration shows that BYD has begun to understand cars.