Fast Science and Technology, November 14 news, Lei Jun today released Xiaomi intelligent chassis rehearsal technology, announced Xiaomi fully active suspension, super four motor system, Xiaomi 48V line control drive, Xiaomi 48V line control steering technology.
In the video demonstration, Xiaomi also realized the operations such as taking off and turning around in place.
Among them, the U-turn in place has attracted a lot of attention, which is mainly due to the brand-new Xiaomi super four-motor system.
Xiaomi car has also posted a detailed explanation on the official account, and even shows the actual picture and decomposition diagram of the motor, which visually shows the new motor.
The Xiaomi super four-motor system is composed of two new self-developed motors and two V8s super motors, together with a new vehicle controller to achieve high-performance, lightweight, four-wheel independent and accurate control of the car, such as in-situ U-turn, extreme cornering and other harsh scenes.
, Xiaomi said, faced with the great challenge of how to increase the power density and torque density in the limited space in the front cabin during the pre-research process.
In order to solve this problem, the engineer team through innovative design, using X-Pin windings to shorten the size of dual motors 20mm, and through planetary gear reducers to reduce the weight of 14kg electric drive, the success of electric drive lightweight and size minimization.
Thus, in the design of the front cabin space, it can not only be upgraded to place double motors, but also facilitate the arrangement of suspension system and steering system, and realize the maximum utilization of space.
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, , while the compact design, Xiaomi self-developed front motor still maintains high performance.
Single power up to 449hp, peak torque up to 380Nm, maximum speed up to 28000rpm.
At the same time, the overall power density has significantly increased to 11.
89kW/kg, with a total power of 2054 horsepower, ensuring the perfect combination of strong power and compact design to provide drivers with the acceleration experience of the world’s top supercar.
The super four-motor system has the ability of four-wheel independent control, which can accurately adjust the power of each wheel and significantly improve the control flexibility and stability.
Its typical application is the U-turn function.
Through precise control, high-precision output of motor torque and coordinated adjustment of four-wheel speed, the vehicle can quickly complete steering in a small space and rotate freely.
At the same time, the efficient three-dimensional circulation cooling system can ensure the stability of temperature and performance under long-term and frequent operation of electric drive, and ensure continuous U-turn without overheating.
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, to ensure accurate coordination of U-turn in place, the vehicle control module (VCU) cooperates with four motors, braking system, steering system, suspension system and sensing system.
The torque, speed and speed direction of the four motors are controlled by the precise algorithm to ensure the coordination of the slip speed of the four tires and produce a stable rotation torque around the center.
In addition, Xiaomi Super four Electric can achieve 500 times per second high-frequency torque cooperative control, combined with torque vector control technology, the vehicle can easily cope with the challenges of skidding and trapping, ensuring smooth driving in complex scenes.
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