Shulou(Shulou.com)11/24 Report--

In January this year, BYD officially launched its high-end new energy vehicle brand-- look up, while bringing a new ESifang technology platform and the first production car based on this platform-- U8. It demonstrated for the first time the extreme safety performance of the eSifang technology platform in the extreme cross-country scene.

Look up to the brand as the product of BYD's R & D accumulation and technological innovation in the automotive industry in the past 20 years, the whole brand logo comes from the word "electricity" of Oracle, indicating the technology and product route of relying on the brand's new energy.

In view of the core technical characteristics of U8, the brand also makes a comprehensive interpretation of the underlying technical logic of the easy Sifang technology platform, the ultimate technical scene capabilities and the experience advantages in the urban life scene.

Yi Sifang technology platform: reconstructing automobile driving force from three dimensions: perception, control and execution.

Yi Sifang technology platform is a set of power system with four-motor independent drive as the core, which makes a comprehensive reconstruction around the characteristics of new energy vehicles from the three dimensions of perception, control and execution, and completely subverts the power system capability system of previous fuel vehicles.

In terms of perception, Yi Sifang took the lead in giving full play to the strong perception ability of the wheel side motor, realizing the uninterrupted omni-directional perception of the vehicle motion state, and combining intelligent driving sensing data such as camera, lidar, millimeter wave radar, etc., so as to provide perceptual data basis for subsequent decision-making and execution.

In the control link, the easy Sifang technology platform is equipped with a highly collaborative electronic and electrical architecture of the central computing platform and domain control architecture. The central controller and each domain control realize the accurate and diversified control of the four motors through the real-time exchange of sensing information and control strategy through the high-bandwidth, low-delay and high-security vehicle Ethernet, and through the high coordination between the controller and sensors.

At the executive level, the four-wheel side motors installed in the easy Sifang technology platform can achieve pure four-wheel independent drive, and independently and accurately control the power of the four wheels according to the needs of the driving scene.

According to CTOnews.com 's understanding of the public information of looking up to U8, the electric drive assembly system equipped with easy Sifang technology platform has a maximum horsepower of more than 1100 horses and a maximum speed of 20500rpm. At the same time, all models of Yi Sifang technology platform will be equipped with 800V high voltage SiC electric control, with a maximum efficiency of 99.5%.

With the comprehensive innovation of the three links of perception, control and execution, Yi Sifang has three core control technologies: four-motor independent control, limit anti-skid control and body stability control, thus creating more abundant driving possibilities. In the desert slope challenge that is most popular for cross-country enthusiasts, the combination of Yi Sifang core control technology and its super power can make the vehicle finish dry pull-out slope easily.

In winter ice and snow road driving, through the core control technology of Yi Sifang, the vehicle can also make full use of the best adhesion on the ground and improve the vehicle stability limit. Looking up to the technology research and development team, looking up to the U8 with easy Sifang technology platform, the ice and snow fixed circle limit speed can be increased by 10% compared with the standard model, and the ice acceleration can reach the industry-leading level.

Yi Sifang technology platform can not only maintain good cross-country performance in these common scenarios. When the vehicle accidentally falls into deep water, the user can choose to activate the emergency floating mode, relying on the accurate four-wheel torque vector distribution ability to keep the driving force of the vehicle and obtain the ability to float for a short time.

You also need to go home safely when you travel to the landscape, and Yi Sifang brings a new travel experience for users.

Yi Sifang technology platform, as an important technology of BYD's long-term technology accumulation and research and development in the past 20 years, has experienced a large number of tests and verification. Through a large number of tests, the Yi Sifang technical team has also discovered the various scenarios faced by the real needs of users. Cross-country is only an extreme challenge scene that is open with looking up to U8 at this stage. Yi Sifang must also be able to solve the practical problems encountered by users in daily travel, such as the traditional large-scale hard off-road vehicles are inflexible in the city, and the stability of high-speed driving is low.

The R & D team of the Yi Sifang technology platform believes that the DNA of the Yi Sifang technology platform is a four-motor drive technology, and one of the best ways to present the user value of this technology is to turn around in place, because it shows the fundamental technological advantages of Yi Sifang to enhance the daily travel experience.

Through the reverse rotation of the wheels on the left and right sides, Yi Sifang can make the vehicle turn in place. The wheels on both sides rotating in the same direction can also shorten the turning radius of the vehicle and pass through the narrow bend through the differential torque output on both sides.

In order to improve the availability of this function, the research and development team of Yi Sifang technology platform has greatly improved the performance of the four-motor system, so that the in-situ U-turn and agile steering function can be used on high adhesion urban roads such as asphalt roads and epoxy floors. Whether you need to park quickly in a narrow parking lot, meet a car on a country road, or encounter a 90 °right-angle bend, the vehicle can adjust its direction through a U-turn or agile steering function, giving the large SUV excellent mobility in similar scenarios.

The excellent perception, control and execution efficiency of the easy Sifang technology platform enables vehicles to solve another major safety risk of traditional cars-high-speed flat tires. Just like driving on ice and snow, a flat tire can cause the vehicle's driving dynamics to lose balance. The high-speed tire burst control ability of the easy Sifang technology platform can continuously adjust the four-wheel torque at a very high frequency after the single-wheel tire burst occurs at the highest 120km / h speed, so that the remaining driving wheels of the vehicle maintain grip and control the body posture to avoid getting out of control, so that the vehicle with a single-wheel tire burst can stop stably and controllably to avoid secondary accidents to the maximum extent.

Finally, the addition of the easy Sifang technology platform to the vehicle safety capability is not only reflected in the performance of the power system itself, but also integrated with the vehicle protection capability. Looking up to the easy Sifang technology platform carried by U8, the protection capability of the core components reaches the IP68 level, and the emergency floating function can avoid the water intake failure of the core parts of the vehicle when floating in a short time. In typhoons, torrential rains and other weather that can easily lead to urban waterlogging, users can safely pass through the urban wading roads.

Ensuring the safety of drivers and passengers is the foundation of all technologies in the automobile industry, and this is also the core value that the easy Sifang technology platform brings to users, through the powerful electric drive assembly system and innovative application functions of the easy Sifang technology platform. what's more, the vehicle is endowed with extreme performance and driving experience.

The three key words of safety, performance and experience prove that the Yi Sifang technology platform is not only a high-performance powertrain with thousands of horsepower, but also changes the control mode of the vehicle logically from the bottom, and controls the vehicle more efficiently and safely. In the future, the easy Sifang technology platform will be carried on the new energy hardliners looking up to the U8 and the pure electric performance supercar looking up to the U9, and try to use the four-motor technology to bring innovative driving experience to users in more mainstream models in the market.

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