The mass-produced version of Xiaomi SU7 Ultra was launched on October 29. The official Xiaomi Auto released the 76th episode of Xiaomi Auto Answers Netizens' Questions last night, answering questions about the relationship between the Xiaomi SU7 Ultra prototype and the mass-produced car, NOA intelligent driving assistance, carbon ceramic brake discs, etc.

各自选 summarizes the key points of this Q&A as follows:

The relationship between "prototype car" and "mass production car"
Prototype cars are mainly used to test and verify design concepts, performance, technology, etc. They are usually produced in small batches and are expensive, and do not need to fully comply with relevant regulations and standards.

Mass production cars are used for large-scale production and sales, and need to undergo more stringent durability and safety tests. Large-scale production needs to consider economy and durability more, and must comply with all applicable standards and regulations.

Take Xiaomi Auto as an example. Xiaomi SU7 Ultra Prototype is a prototype car, and Xiaomi SU7 Ultra is a mass production car. We will fully transfer the core technologies of Xiaomi Super Triple Motor System, Track Version High-Power Battery Pack, Track Version Cooling System, etc. on the prototype car to the mass production car after long-term testing and verification on the Nürburgring Nordschleife. At the same time, the Xiaomi SU7 Ultra mass production car itself will also be tested and verified on the Nürburgring Nordschleife. This process also makes Xiaomi SU7 Ultra a four-door sports car with pure track genes.

The difference between the closed double-chamber air spring of Xiaomi SU7 Ultra and the Max air spring
Both Xiaomi SU7 Ultra and Max are equipped with an integrated closed air spring control system. Compared with the traditional open air spring, the adjustment speed is faster, with a speed increase of 100%; the adjustment stroke is longer, with a maximum adjustment stroke of up to 50mm; the operation is also quieter, with a noise reduction of 7dB, taking into account both sports performance and luxurious comfort experience.

In order to meet the ultimate track driving experience, Xiaomi SU7 Ultra is equipped with a closed double-chamber air spring. The advantage is that it can be switched intelligently according to the driving mode, road conditions, and body response, and the stiffness and height can be adjusted separately. It can also have ultra-high stiffness support when the body posture is the lowest, and of course the cost is higher.

Xiaomi SU7 Max meets the needs of personalized urban vehicles and is equipped with a closed single-chamber air spring. Compared with the traditional open air spring, it has a faster adjustment speed and higher reliability, and can obtain a better daily driving experience.

"Crack" of carbon ceramic brake disc
The "crack" pattern on the surface of carbon ceramic brake disc is an inherent characteristic of coated carbon ceramic disc. All coated carbon ceramic discs on the market using the same process have this characteristic.

The coating with silicon carbide as the main component is conducive to maintaining the uniformity of the friction surface and protecting the internal matrix material of the disc body. After the coating has been subjected to high temperature during the production process, fine surface "crack" patterns will naturally form. It has been verified that the performance of coated carbon ceramic discs is better than that of uncoated carbon ceramic discs, and it will not affect the strength and performance of the brake disc.

The maximum operating temperature of the racing carbon ceramic brake disc equipped with Xiaomi SU7 Ultra exceeds 1300 degrees, and the normal service life can exceed 500,000 kilometers. Normal use can be almost maintenance-free for life.

Usage instructions for city pilot assistance NOA
We have started to push the city pilot assistance that can be opened nationwide this morning, realizing that smart driving can reach places where the car navigation can reach.

To ensure the normal use of the function, please confirm:

1. Your car has been upgraded to Xiaomi HyperOS 1.4.0.
2. Log in to your account and the account's safe intelligent driving mileage has reached 1000km.

The intelligent driving mileage can be queried through the "Xiaomi Auto App-My-Intelligent Driving Zone" for the "Intelligent Driving Data" of the bound vehicle.

The unlocking status of the city NOA function can be queried through the "Intelligent Driving School-Pilot Assist Global Function Teaching", and the intelligent driving mileage displayed there is the safe intelligent driving mileage of the personal account.

Considering the situation that multiple drivers share the same car, for safety reasons, the driver's personal Xiaomi Auto App account safe intelligent driving mileage must reach 1000km, and complete the intelligent driving school learning before the city pilot assisted driving function can be turned on.

3. Set the destination on the car navigation and ensure that the vehicle is in motion.

After meeting the above requirements, press the intelligent driving button on the left side of the steering wheel to start the city pilot assistance function that can be opened nationwide.

The city NOA function provides car owners with city navigation assistance from the starting point to the end point in complex urban scenes. Unlike highway NOA, city NOA faces a more complex driving environment. Based on safety considerations, we set a threshold of 1,000 kilometers of intelligent driving safety mileage, hoping to help intelligent driving novices familiarize themselves with the function and better deal with complex road conditions. In addition, the current intelligent driving is not automatic driving, and drivers still need to pay attention to road conditions at all times and intervene in time when necessary to ensure safety first.

Optimization of intelligent driving in version 1.4.0
After 2 months of optimization and upgrade, we have updated more scenes in version 1.4.0, making the experience smoother and more practical.

To realize the city NOA function that can be used nationwide, four major capabilities need to be realized: intersection traffic, flexible detour, small road traffic, and intersection U-turn. These scenes are the key experiences of version 1.4.0.

Intersection traffic: If you want your vehicle to drive on roads large and small across the country, you need intelligent driving to accurately follow the navigation to drive, analyze the road topology, and plan the traffic trajectory at the intersection.

Flexible detour: During driving, it is inevitable to encounter obstacles ahead. Intelligent driving is required to avoid obstacles in time and overtake at the right time when encountering construction, pedestrians, two-wheeled vehicles or temporarily parked or slow vehicles, accurately identify the driving intentions and obstacles of various traffic participants, and implement corresponding solutions.

Small road traffic: Among many driving conditions, small roads are the most complex. Intelligent driving is required to deal with complex scenes such as stationary vehicles, queued vehicles, and oncoming vehicles in extremely narrow spaces. After accurately restoring the real road conditions, various driving behaviors such as cross-line avoidance, lane avoidance, lane avoidance, overtaking and lane change are achieved through game theory.

U-turn at intersection: Version 1.4.0 adds a U-turn function, which can automatically change lanes to the U-turn lane in advance according to the navigation. The vehicle will comprehensively analyze the lane topology, traffic light information and oncoming vehicles, plan the U-turn path and timing, and observe the positions of pedestrians, two-wheeled vehicles and other traffic participants in real time during the U-turn process, and avoid them in time. At present, there are not many manufacturers in the industry that can realize this function. We will continue to optimize and improve our capabilities to meet the needs of more travel scenarios.

End-to-end version of intelligent driving launch time
At the end of November, we will start the targeted invitation experience of end-to-end full-scenario navigation assistance, and start the push of the pioneer version at the end of December. Please wait patiently, car owners and users, we will push it to everyone after fully verifying the function.