Rain Technology reported on June 28 that a certain media tested Xiaomi YU7 on the track and saw a fire in the brake pads, which attracted widespread attention.
Xiaomi Auto’s official Weibo account quickly explained this matter. The statement pointed out that the Xiaomi YU7 Max in the video stopped directly in the extreme state without the heat dissipation cycle after a brief bead and flight ring at the Tianjin V1 Racing Stadium, causing the brake pads to catch fire due to high temperatures. Xiaomi officially emphasized that the brake system itself did not have any failure problems and all functions were operating normally.
It is particularly noteworthy that the test vehicle did not use the “Energy Recovery Enhancement” function in the Xiaomi YU7 Max Master mode at that time. Xiaomi emphasized that this function is designed to enhance the energy recovery intensity under track conditions, thereby reducing the burden on the mechanical braking system. Even in the case of ABS locking, this function can still provide braking energy recovery up to 0.2G, effectively reducing the possibility of extreme situations where the brake system temperature exceeds 600°C.
Xiaomi official explanation: In track driving environments, vehicles often need to perform emergency braking at super-high speed, which makes the brake system bear a load far higher than daily driving. Under such extreme operating conditions, the temperature of the brake disc will rise rapidly, and if effective heat dissipation measures are not taken, it may cause a fire in the material. This is similar to what any high-performance vehicle is in the track and is not a problem unique to Xiaomi.
In addition, as a medium and large SUV, Xiaomi YU7 has higher weight and high power performance brings higher track tail speed than smaller SUVs. These factors all mean that during the violent braking process, the brake system generates more heat. Therefore, effective cooling is a crucial and basic common sense in track driving. Good braking performance is closely related to cooling capabilities, and no vehicle can ignore this when challenging the limits of the track.
Xiaomi YU7 Max uses low metal brake pads, and its materials include metal fibers, abrasives, resins and other organic matters. Under high temperature environments (usually above 300°C), resins and other organic matters will undergo polymer branched cleavage reactions, producing moisture, carbon monoxide, carbon dioxide, alkyl, aromatic gases, etc. Among them, some combustible gases may produce brief open flames under high temperatures (usually the brake disc temperature is > 600ºC) and sufficient oxygen. Xiaomi officially pointed out that this is a normal physical phenomenon and will not cause braking performance to fail.
Xiaomi YU7 is positioned as an urban luxury high-performance SUV. Xiaomi official also strongly recommends that you should not try the track easily without professional upgrades and preparations. We must learn driving skills step by step on the premise of fully understanding the boundaries of product performance and mastering professional driving knowledge. For ordinary consumers, safe driving is always the first priority.
If you really want to drive professionally, you need to upgrade the vehicle’s tires, braking systems, and heat dissipation key components, and use Master mode and turn on the energy recovery enhancement function to avoid safety hazards in extreme operating conditions. This reflects Xiaomi’s rigorous attitude towards safety.
