Hunan Xiaomi SU7 brake failure？ Xiaomi PR admitted： It is indeed a software misidentification.

According to the client news of Southern Metropolis Daily, on May 13th, the media reported that a few days ago, Mr. Li, the owner of a Xiaomi SU7 in Hunan, reported that during the parking process of his newly purchased millet SU7, the brakes were suspected to suddenly fail, the brake pedal had no damping feeling, and an alarm sounded in the car, and four abnormal messages such as "brake system failure" appeared. In addition, Mr. Li said that after the fault occurred, he called the Xiaomi car online service hotline for nearly half an hour, then called the SOS emergency call system and was transferred to the emergency road rescue center, but no one answered.

Mr. Li said that after more than an hour, the car was dragged back to a Xiaomi car delivery center in Changsha overnight, and the staff worked overtime to check. The next day, the feedback was that the brake electronic software was misjudged. And when the car arrives at the delivery center, the fault has been automatically eliminated.

On the afternoon of May 13th, Wang Hua, general manager of the public relations department of Xiaomi Group, publicly responded to this matter in Weibo. Wang Hua admitted that after verification,"It’s really a software misrecognition.".

Wang Hua said that it was confirmed by the analysis of the engineers of the automobile department that the reason for the failure was that the vehicle was at that time.The system of the master brake controller (DPB/BCP) mistakenly identifies the degradation and triggers the backup braking strategy., the auxiliary brake controller (ESP/BCS) directly responds to the braking demand to provide braking deceleration for the vehicle; At the same time, the big screen of the vehicle also reported the fault prompt of the braking system.

The "insufficient foot feel" reflected by Mr. Li is because in the above process, the vehicle entered the standby strategy of the braking system, and ESP pumped DPB brake fluid to increase the braking pressure for the wheels and let the vehicle brake; As the brake fluid is pumped from DPB by ESP, the pressure in the master cylinder of the brake decreases rapidly. It is precisely because the brake system is switched for the first time that the pressure in the cylinder of the original master brake is 0.

However, Wang Hua said that this does not mean that all braking force is lost. At this time, ESP intervened in braking, and there was no complete failure of the braking system and the loss of control of the vehicle.

Wang Hua pointed out that the braking system of SU7 is designed by using the double backup mechanism of DPB+ESP, and Xiaomi Automobile official micro-answered the questions of netizens on May 3.

Nandu Wancaishe reporter inquired about Xiaomi Automobile official micro-understanding that Xiaomi SU7 is equipped with Brebo 4-piston fixed calipers, matching Bosch DPB, intelligent decoupling braking system, providing braking pressure on all wheels, and ESP 10.0, which is responsible for wheel braking force adjustment and pressure control to keep the car body stable. Xiaomi Automobile introduced in Guanwei that if the brake module fails, DPB and ESP are mutually backup; If DPB and ESP fail at the same time, traditional mechanical hydraulic braking can still be used to effectively slow down.

"At present, the vehicle has returned to normal, but it is still based on the attitude of being responsible to the user. The staff indicated to the user that they can support the user’s request for returning the car or changing the car, and at the same time cover the expenses incurred by returning the car. If you change cars, you will be given priority according to the original order number, and you will be compensated for the waiting period. " Wang Hua said.

In response to the problem that the customer service hotline was not connected, Wang Hua said that at that time, it was at the peak of the incoming line, and there were many busy queues, and it was not connected in time. Xiaomi Automobile apologized for this. In this incident, the user-specific service group responded to the needs of users and arranged road rescue support.

In view of the shortage of professional customer service seats, Wang Hua said that recruitment was urgently started in April, and it is expected that the online customer service pick-up rate will be greatly improved by the end of May. SOS is mainly aimed at the response channel of medical rescue for the wounded in vehicle accidents, and the professional platform institutions in the industry cooperate to provide this service; Other car scene services are mainly provided by Xiaomi after-sales service.

Shortly after the release of Wang Hua Weibo, Li Xiaoshuang, vice president of Xiaomi Automobile, forwarded the content with an article "Hope to Know".

A few days ago, a car blogger revealed that the number of locks on Xiaomi SU7 has exceeded 100,000. However, while the sales volume is rising, Xiaomi Automobile may still face the quality control challenge of the first batch of cars off the assembly line.

It is worth mentioning that shortly before the brake failure of Xiaomi SU7, on May 5, the car of Mr. Wen, the owner of SU7 in Xiamen, Fujian, also encountered a suspected quality problem, and the new car he just mentioned was prompted to fail less than 40 kilometers. According to media reports, the cause of the vehicle failure needs to be further analyzed, and it is temporarily impossible to repair.

As of May 13th, Xiaomi Group-W (1810.HK) closed at HK$ 19.36 per share, with a total market value of HK$ 483.1 billion, down slightly by 0.21%.

Original title: Hunan Xiaomi SU7 brake failure? Xiaomi PR admitted: It is indeed a software misidentification.