Chassis wire control of the "spring" one, two,

The chassis wire control market is ushering in the spring.

This month, Great Wall Motor Coffee Intelligence 2.0 announced that it will soon introduce a new electronic and electrical architecture and intelligent wire control chassis for mass production, upgrading intelligent cockpit, intelligent driving, and intelligent services, and bringing users a more humanized intelligent experience.

With the upgrade of the intelligent remote control chassis to meet the requirements of higher level autonomous driving.

Great Wall Motors claims that the intelligent wire control chassis is an epoch-making intelligent chassis technology platform, and it is also a subversive chassis technology revolution.

At the same time, in the primary market, a number of domestic wire control chassis suppliers have received a new round of financing this year.

, exclusively invested by Shunwei Capital (behind which is Xiaomi Auto). The company's cumulative financing amount reached 123 million yuan, and its core products include electronic vacuum pumps, intelligent boosters and wire control sensors.

At the same time, the company completed the 60,000th EHB off the production line. This round of financing will enrich the product line and deepen the research and development and industrialization layout of the key technologies of the next generation of wire control chassis.

The funds will be used to expand the company's ESC production capacity, establish an eBooster production line, and promote mass production of new products such as ADAS, L3-EPS, and IBC.

With the increase in the scale of financing, it means that local suppliers in China's chassis-by-wire control market are breaking down the market barriers of key core components for intelligent driving that have been monopolized by foreign giants such as Bosch, Continental, and ZF for many years.

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With the innovation of intelligent driving and chassis architecture, the growing demand for safety, comfort and experience of end users, including the requirement for lightweight body, is driving the chassis-by-wire market into a new round of high-speed growth cycle.

Over the past few years, the IPB intelligent integrated brake control system for new energy vehicles is driving the growth of a new round of linear control dynamics market. Taking BYD Han as an example, under the background of IPB intelligent integrated brake control system, the ESP response time has been shortened from 600ms to 150ms, and the performance has been greatly improved.

As Bosch's first mass-produced customer in China, according to the data calculation, the IPB intelligent integrated brake control system can enhance the functional experience of the traditional AEB (emergency braking) system and greatly improve the response time redundancy of the system.

But by-wire technology faces a tough road, including high incremental costs, the risk of electronic equipment failure, and the need for consumers to adapt to different driving experiences. Among them, the redundancy requirement has increased with the improvement of intelligent driving level, and the proportion of cost has increased a lot.

In the case of Bosch's IPB, in addition to its conventional high-dynamic pressure building capability, it can realize energy recovery and provide redundant braking required for automatic driving. At the same time, it supports remote diagnosis and refresh, and can realize big data analysis monitoring through the cloud.

For example, Dynametal introduced invalid backups in EBS. Since there is no direct contact between the simulator and the electronic control unit, under normal circumstances, it is controlled by the line, but if the system fails, the system will automatically enter the direct connection mode, and the driver can still apply force to the brake pedal to achieve braking, further ensuring the safety and reliability of the system.

In fact, from the current situation of the industry, non-first-line models have begun to accept the solutions of domestic suppliers, and there have been projects in market segments such as unmanned cars and automatic driving, and the current breakthrough lies in the volume models of first-line passenger car brands.

Behind this, whether it is Qingdu Technology with SAIC background, or Yingchuang Huizhi invested by BAIC and SAIC, And Cun yichuang under the Great Wall, etc., all have natural OEM background advantages.

"Basic performance is no longer a problem, just like the localization of many sensors, it is only a matter of time before it is accepted by the market." In the eyes of industry insiders, the difficulty lies in how to ensure safety. For example, the risk of electronic ECU failure, as well as the problem of failure of redundant backup, etc., which requires in-depth cooperation between the in-line solution provider and the vehicle, Tier1, and intelligent driving solution providers.

For example, Great Wall Motors has carried out independent research and development of line control and steering by wire control and steering through two subsidiaries of Seiko Chassis and Honeycomb Yichuang, respectively, coupled with its breakthrough self-research in the field of intelligent driving (through the ultimate wisdom), and the independent integration development of algorithm + chassis control + application layer has completely broken the past supplier "black box" model.

The strongly coupled business model is also regarded as an excellent opportunity to break through on China's local wire control chassis scheme.

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Before domestic suppliers entered the core track, the traditional foreign Tier1 has also sharpened its knife.

In addition to the market share advantage that Bosch has accumulated,

Taking the Beijing Polar Fox Alpha S Huawei Customized Edition as an example, according to the official disclosure information, the vehicle safety system sets up a dual redundant system in terms of brake, battery, sensor, CPU, steering and architecture, etc., and if the main system fails, it will immediately switch to the redundant system.

Among them, dual brake redundancy (millisecond switching emergency braking system) became the highlight of the car, and for the first time in the Chinese market, continental's redundant braking solution (MK C1+ MK100HBE) was equipped, thus cooperating with Huawei's urban + high-speed navigation intelligent driving mass production plan.

Officially disclosed that when the MK C1 main braking system fails, the HBE redundant braking system will switch to the HBE system within milliseconds and provide 60% of the main system braking effect, providing emergency braking function.

As the first to realize large-scale mass production of electronic braking systems

In addition, Bosch has another system of switch-by-wire redundancy: the Servolectric® power steering system with faulty operation function, in which the power supply, electronic circuits, control unit and servo unit are double redundant. One of the components fails and the other takes over.

Another low-cost solution is brake-steering redundancy technology.

This is a low-cost innovation from CNXMotion, a joint venture between Continental and Nexteer, which is based on a traditional electronic braking system that provides safe steering while controlling the speed of the vehicle, providing an additional layer of safety and redundancy for the vehicle.

This feature takes over the lateral control of the vehicle by selectively applying brake brakes to individual wheels while maintaining speed through the powertrain control. At the same time, as another layer of redundancy, the lateral control of the vehicle is maintained without adding additional hardware costs.

Among them, the landing of autonomous vehicles that cancel the steering wheel is regarded as the main factor driving the large-scale mass production of the steering-by-wire system.

However, in the past, there was basically no industry norm for chassis control by wire, in addition to the functional safety and other related vehicle specification standards that other electronic systems need to have, which is one of the reasons why the industry did not have large-scale steering of wire control technology, more is the change carried out by car companies themselves according to the needs of models and functions.

At present, the domestic market has launched the commercial vehicle in-line control chassis interface protocol, passenger car automatic driving by-wire chassis performance requirements and test methods and other related industry standards, for the relevant enterprises, is a big positive.

In addition, starting with L2, the demand for simultaneous control of horizontal and vertical directions has also driven automakers to accelerate the commercialization of steer-by-wire systems. For example, last year Tesla disclosed that it was considering forming a steer-by-wire R&D team, while also taking into account the research and development of brake/motor integration, which is also crucial for the functional safety of FSD.

Previously, Tesla used the Bosch iBooster, which was still the mainstream of the market, in terms of braking, and the steering system was still a traditional mechanical connection structure. It is reported that Tesla's new generation Model S and Cyberruck pickup truck may be the first to be equipped with a self-developed steer-by-wire steering system.