The brake system of a Xiaomi Yu7 caught fire after a session on the circuit. A phenomenon that may seem worrying, but the brand is reassuring about the safety of its new electric car.
The frenzy around the launch of the Xiaomi Yu7, including with an insane number of commands, can be transformed into a catalyst for the slightest anicer around the brand’s new electric car.
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Which did not fail, since the local media Dongchedi relayed on Weibo The video of a YU7 with a fire braking system after a track session. Let’s dig the subject.
619,5°C
Context: a Yu7 Max, the most efficient version of the electric SUV, participated in a track session on the Tianjin circuit. The car returned to the stands with one of the flames emanating from the front left brake caliper – a thermal camera recorded a temperature of 619.5 ° C.
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The subject seemed important enough for Xiaomi for her to approach the subject during a question/answer session, always on Weibo. The brand specifies the circumstances, and declares that the yu7 “Made a heating lap and a quick tour on the Tianjin V1 circuit, then parked directly without performing cooling tours”thing generally recommended for any car that has made the track.
Moreover, “The test vehicle did not use the” Energy Recovery Enhancement “function of the ‘Master Mode'” ” increasing “The intensity of regeneration under the circuit conditions”what “Reduce the load on the mechanical braking system” And therefore its rise in temperature. Xiaomi still promises that, despite the flames, “The braking system did not present any failure, and its functions were intact and operated normally”.
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In short, a way to turn off the media fire, while Xiaomi is barely recovered from a scandal around the SU7, in which three students had perished in an accident involving the brand’s autonomous driving system.
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The laws of physics
Concretely, what happened? Xiaomi details: “Resins and other organic materials [contenus dans les plaquettes de frein] […] generate certain gases [qui] Can produce short -lasting naked flames at high temperatures (generally when the brake disk temperature is greater than 600 ° C) and in a sufficiently oxygenated environment ”before clarifying that he “This is a normal physical phenomenon, but braking performance is not altered”.
Add to this that the YU7 Max, even if it announces leading performance (0 to 100 km/h in 3.23 s, 253 km/h of top speed, etc.), remains a 2,405 kg SUV. Under these conditions, the laws of physics remain mistresses.
Xiaomi recognizes this without problem: if the car braking system is calibrated for maximum safety in road conditions, the use on the circuit (especially when the optimal conditions are not met) requires “To improve tires, the braking system and thermal dissipation of the vehicle” -This may be the case with a future ultra version which, if it is modeled on the Ultra SU7, promises high-flying performance.
