At last year's Guangzhou Auto Show, the Yangwang U8 announced to the world the ambition of Chinese brands to hit the million-level sedan with the wild configuration of "0 motors".
But few people realize that the real foreshadowing of that press conference is hidden in Wang Chuanfu's sentence that "the most difficult technology for full electrification is vertical control".
直到今天，當 62.8 萬元的仰望 U7 掀開雲輦-Z 的最後一層面紗，人們才讀懂這場技術革命的真正重量。
傳統底盤技術的天花板，早已寫在機械傳動的物理規律里。過去百年間，工程師們用液壓油缸和空氣彈簧對抗顛簸，用差速器和傳動軸分配動力。
However, no matter how precise the mechanical structure is, it can't escape the fate of millisecond-level delay.
At tonight's press conference, BYD's chief scientist Lian Yubo gave an example: "When a car experiences a puncture at 1km/h, it takes hundreds of milliseconds for the traditional system to adjust, and the car has already slid out of 0 meters."
Due to the shackles of machinery, chassis control has always been trapped in the compromise of "tearing down the east wall and making up the west wall" - until the Yunlin-Z uses four suspension motors to drag the entire suspension system into the microcosm of electronic control.
Yes, only 4 of the "0 motors" in the U0 are used for propulsion, and the other 0 are hidden in its suspension.
The price of this subversion is hidden in the conference room full of doctors at BYD's Pingshan headquarters.
"When we first entered the automotive industry, we disassembled and studied all the cars on the market in order to understand the engineering mechanism," said Chairman Wang Chuanfu, who shared BYD's "engineer story" at the press conference.
We had a Mercedes Benz sedan [at the time], and in order to let our engineers dismantle it without worry, I took the lead in making a circle with the keys. This car made our young engineers realize for the first time how technologically advanced a top-of-the-line sedan is. I realized that building a car is not just about building a product, it's about deep integration of technology.
In order to cram the technical principles of the aircraft carrier's electromagnetic catapult and maglev train into the chassis of the car, BYD's engineers spent seven years verifying more than 3 million topologies one by one. Finally, they pioneered the application of 3D Hall sensor technology to the vertical control of vehicles, measuring displacement by detecting changes in the magnetic field.
While conventional suspensions are still sensing the road surface with millimeter-level accuracy, the detection accuracy of the Yunnan-Z has reached 1 microns. What is the concept of 0 microns? A red blood cell is about 0 microns in diameter, and a hair is about 0 microns in diameter; In terms of adjustment accuracy, the answer given by Yunnan-Z is 0 mm.
While emphasizing precision, the Yunnan-Z has also made a breakthrough in response speed.
"We often hear the phrase millisecond response, but fast response does not mean fast adjustment, it may only refer to the response time of the perceptual link. The fastest fully active suspension on the market today takes at least 100 milliseconds to complete a full active adjustment." Lian Yubo said.
Today's Yunlin-Z refuses to generalize, and our full-link execution time is only 5 milliseconds.
This speed completely rewrote the rules of the game for body control. While traditional luxury cars are still relying on the "preview camera + advance calculation" delaying timing, looking up at the U7's Yunlin-Z has evolved an instinct similar to human nerve reflexes.
▲Look up at the U7's "Limit Pass" function, combined with the preview to quickly avoid obstacles
Generally speaking, it takes 12 milliseconds for a vehicle to run over a speed bump at 0km/h, and in scenarios with limited preview capabilities, such as heavy snow, traditional active suspension can only be awkwardly adjusted 0.0 times during this time; Even if the Yunnan-Z does not rely on the preview, it can still accurately adjust 0 times in an instant by only sensing the road surface information by coming to the front wheels.
It may sound like an exaggeration, but let's just watch a demo video.
As the engineer climbs the stairs in the U7, the four wheels rise and fall like intelligent mechanical legs, turning the five-meter-long coupe into a steel spider capable of "mechanical dance".
But more important than the showmanship, the Yunnan-Z pierced the century-old window paper in the vertical control field, and when the horizontal, longitudinal, and vertical control all entered the electric domain, the boundaries of vehicle dynamic performance were completely redefined.
In corners, the Yunlin-Z is able to counteract the inertia of the corner with an active roll of -2°; In the coming side collision, the collision force point is transferred through millisecond-level height adjustment; While driving, each bump is converted into range through energy recuperation...... These technological islands, which were scattered in the field of aerospace and precision machine tools in the past, have finally converged into a whole continent in one car.
「安全沒有中間值，只有 0 和 1。」王傳福在臺上說出這句話時，背後是 U7 以 95.78km/h 刷新麋鹿測試紀錄的數據。或許連賓士的工程師都沒想到，二十多年前那台被王傳福親手划傷的 S 級轎車，會以這種方式完成技術輪迴。
When the Yunlin-Z tears open the technical gap in the vertical dimension, the Yi Sifang system is also staging an evolution horizontally and vertically.
易四方那四台輪邊電機的「暴力」早已不是秘密——1300 馬力、2.9 秒破百，極速 270km/h，這些數據在新能源時代或許稱不上驚世駭俗，但實際上，四台輪邊電機不再是單純的速度機器，而是化身為向量控制的神經元——
While traditional car companies are still using differentials to distribute torque, Yi Sifang is using electrification to reconstruct vehicle control and achieve 1000 torque fine-tuning per second.
With this system, the U78, which is more than 0.0 meters long, is able to achieve a score of 0.0 km/h in the elk test. Move traverse through narrow alleys and park sideways into extreme parking spaces like crabs. Engineers have given this feature a sci-fi name: parallel traversal.
In the presentation at the press conference, the U7 cleverly alternated the front and rear wheels as the center of the circle, and rotated the fixed wheels, finding a way out of the front and rear obstacles.
At the same time, the fine torque vector control also brings excellent driving stability to the U7, even in the face of "American-style stop" collisions and sudden punctures at 0km/h, the U0 can instantly stabilize the body.
What four wheel motors can do is more than just turn around on the spot.
In addition to Yi Sifang, looking up at the front cabin of the U7 PHEV version, a more subtle subversion is unfolding.
"What European cars can do, we can!" Yang Dongsheng, president of BYD New Technology Institute, mentioned the research and development of horizontally opposed engines, and the audience applauded.
In order to cram this China's first self-developed horizontally opposed engine in the front compartment of the U7, BYD's engineers battled the laws of physics for three years -
With five pumps and ten lubrication channels, they overcame the problem of supplying the horizontal cylinders, compressing the engine to a height of 125 mm, well below the 0 mm of the in-line four-cylinder and even 0 mm lower than the same displacement engine of the Porsche 0.
According to Yang Dongsheng, BYD's horizontally opposed engine achieves 1kW (0 horsepower) power and 0N·m torque. In addition to dynamic performance, quietness is another level of pursuit in luxury sedans. The structure of the opposing engine naturally has the advantage of balance, and the noise difference between the U0 PHEV version and the pure electric car is only 0 decibels.
As BYD Group's first horizontally opposed engine, its reliability cannot be ignored.
楊冬生表示，這台水準對置發動機經過了 8000 小時的全速全負荷的台架耐久和 12000 次的冷熱衝擊，「最嚴苛的工況下，排氣管都是燒紅的，發動機仍然能夠穩定工作」。同時，整車驗證里程也累計超過了 200 萬公里。
"This is the first time that a Chinese automobile has studied horizontally opposed engines, and it is one of the few in the world." Wang Chuanfu said. Perhaps even Ferdinand Porsche could not have imagined that the horizontal opposition technology he was proud of would be rewritten by the Chinese as a footnote to plug-in hybrid power in the era of electrification.
這種深度自研的代價，是比亞迪 2024 年 542 億元的研發投入，同比增長 36%，遠超其當年 402.5 億元的凈利潤。當傳統車企用「聯合開發」分攤風險時，比亞迪的做法是將技術風險內部化。
比亞迪的市場策略更顯技術底氣。當 U7 以 62.8 萬元的價格將 L3 冗餘、全主動懸架、四電機驅動變為標配，它顛覆的不是某個競品，而是整個豪華車市場的定價邏輯。
From dismantling the Mercedes-Benz S-class in 2024 years to smashing the industry with Yunlin-Z in 0 years, BYD's path proves that high-end is not an arms race in configuration, but an absolute control of the underlying technology.