The evolution of chassis technology is the key to promote intelligent driving and intelligent module to a higher level.
it provides a bearing platform for autopilot and intelligent interaction, and is called the “third floor” of automobile intelligence.
In the face of the profound changes in the automobile chassis from traditional to intelligent, more and more Chinese car companies have opened the “governor’s pulse” of the intelligent chassis, increased the degree of R & D investment, and launched a challenge to foreign brands represented by BBA to seize the land of technology.
In recent years, many domestic OEM have made efforts in the field of smart chassis to build their own technology research and development moat, such as SAIC Zhiji’s telepathic chassis, Huawei’s Turing chassis and Weilai Tianlai chassis, etc.
Last week, on Chery Innovation Day, Qirui Guanxuan, together with Huawei, released the cloud platform intelligent chassis 2.
0 technology, which uses a new generation of electrical architecture, 1000 TOPS computing power, and the vehicle OTA upgrade time can be less than 25 minutes.
Last week, the Weilai Institute of Automobile and Automobile Evaluation also held a seminar on intelligent chassis.
At the forum, university intelligent chassis technical experts and technical representatives of automobile enterprises and parts enterprises focused on the development trend of automotive chassis technology under the background of intelligence.
the importance of intelligent development to the technological innovation of automobile chassis is discussed together.
On the other hand, in the intelligent field of Huawei’s automotive business, following the intelligent cockpit, intelligent driving and Hongmeng operating system, the Turing smart chassis has gradually entered the industry vision and become the technical highlight promoted by Huawei.
Zhijie S7 has become the first car.
How to understand the intelligence of the chassis, said Li Liang, a professor at the School of vehicle Transportation of Tsinghua University, the traditional chassis faces many difficulties.
Taking the electronic control architecture as an example, there are mainly the following four bottlenecks– first, the spare parts supply chain is dispersed and the matching cost is expensive.
second, each sensor forms an information island.
third, each sub-function optimization goal is different.
fourth, the chassis executive parts are independently controlled.
The intelligent chassis is composed of five subsystems: wire-controlled dynamic, wire-controlled steering, wire-controlled suspension, wire-controlled drive and wire-controlled shift, in which wire-controlled braking and wire-controlled steering are important links in tackling key technical problems, which directly affect the overall intelligent process of the chassis.
Li Liang believes that the essence of intelligent on-line chassis is to integrate the intelligent driving domain as the “brain” and the chassis domain of the “cerebellum”.
The former does a good job of perceptual fusion, positioning and navigation, intelligent decision-making and trajectory planning, while the latter does a good job of information fusion, unified model solving, motion coordination planning and collaborative execution planning.
Xiao Baihong, head of the vehicle application software department of Weilai, told Automotive Commune It is necessary to understand the intelligence of the chassis from four dimensions, namely, cloud data layer (layer data fusion algorithm, multi-sensor fusion, swarm intelligent decision-making), operating system (full scene function, recognition and control algorithm), computing platform (sensor, controller and computing platform) and mechanical structure (shock absorber and steering system, etc.
), in the field of intelligent chassis Through the integration of various electric control units, sensors and actuators, domestic manufacturers realize the intelligent control and optimal management of the chassis system.
This includes the technology of on-line braking system, electric brake stabilization program, electric brake steering and so on, which improves the braking response speed and accuracy of the car.
Recently, Weilai has completed the technological advance from the construction of the intelligent chassis by NT1 to the AI enabling of NT2, and then to the skylight chassis of NT3, leading the further technical exploration of the intelligent chassis through all-line-controlled active suspension.
The Zhijie S7 was the first model to be equipped with Huawei Turing chassis which was warmed up by Huawei’s key publicity as one of the bright spots in the pre-sale stage of the new car.
In the field of intelligent vehicles, the intelligent S7 not only upgraded the intelligent driving ADS 3.
0 and Hongmeng cockpit 4.
0, but also the Turing chassis and DriveONE electric drive were born in Huawei.
The Turing chassis of the subsequently released Hangjie S9 is built for the D-class car, with a front double fork arm + rear multi-link four-wheel independent suspension, with a continuous variable damping damper and a five-gear height air spring.
and the use of an integrated design, the structure has been further deepened.
To subdivide the domestic opportunities of the track, referring to the development status and future of the intelligent chassis, Xiao Bohong, head of the vehicle application software department of Xilai, believes that the general direction must be smarter, more autonomous, safer and more comfortable.
“in terms of chassis hardware, the reserves of all car companies seem to be the same, but from the point of view of the space for innovation, the culmination has not yet arrived.
” Taking the on-line chassis as an example, experts at the meeting told the Automobile Commune that 2026 is the key node for the landing of the intelligent on-line chassis industry, but the industry is now concerned about the introduction of relevant regulations and standards, and how to weigh costs and benefits in small batch production.
Air suspension is also faced with cost problems.
In the past, the price of air suspension was higher, mainly equipped with luxury cars above 500000 yuan, especially joint ventures or imported luxury cars.
With the decline in the cost of empty suspension products, experts at the meeting believe that in recent years, the model will gradually infiltrate to about 200000 yuan, and the price of the domestic Qirui era ES is in the range of 20-300000 yuan.
From a global point of view, overseas air suspension suppliers start early and their technology is mature.
Overseas luxury brands such as BBA generally purchase air suspension parts from Weibak, Continental Group, AMK and other companies, but the development cycle of domestic air suspension manufacturing products has been reduced from more than two years to 18 months, which has the advantage of fast response.
There is “intelligence” on one side and “localization” on the other, and the investment and financing related to smart chassis has also been quite hot in the past two years.
The track of brake by wire, steering by wire and active suspension has attracted much attention from capital, and there is more room for domestic substitution and infiltration.
According to the incomplete statistics of domestic media, there are 20 financing projects in the field of smart chassis in 2023, double the number in 2022.
No matter whether it is brake by wire, steering by wire, suspension by wire or chassis controller, the domestic supply chain has market space, among which the development of brake by wire and steering by wire is more difficult, but with the narrowing of the gap between independent and foreign suppliers, the potential of domestic substitution is still great.
” An expert from the domestic production line control Tier 1 told the Automobile Commune that there is a lot of room for the domestic camp in the supply chain and the domestic OEM smart chassis also has its own technical moat.
Xiao Bohong, head of the vehicle application software department of Weilai, believes that taking Weilai as an example, at least the following capabilities can lay a good foundation for the research and development of intelligent chassis technology.
First, the computing power is free.
The Ulai NT2.
0 platform model uses four Orin chips, and the computing power reaches 1016Tops.
Second, the whole stack is self-developed.
Especially at the NT2.
0 stage, NIO has independently developed the SKYOS·Tianshu system and the ICC computing platform, making it easier to promote cross-domain integration and open up the driving domain and chassis domain.
Self-development of the algorithm is also more conducive to road identification algorithms and suspension control algorithms.
Third, the bump comfort layer, crowd-sourced map application, crowd-sourced layers are dynamically updated daily, and data memory is not easily affected by external environments such as weather.
At present, whether it is vehicle manufacturers like NIO and BYD, or technology companies like Huawei, they are all rapidly deploying smart chassis layouts.
On the other hand, domestic parts suppliers looking for business opportunities in fields such as wire-controlled chassis and air suspension are also sharpening their knives and trying to seize the blue ocean of domestic alternatives to smart chassis tracks.
Welcoming the spring of localization of smart chassis, more and more players have found their own unique positioning and technical moat.
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