Under what circumstances does ABS trigger?

[Jonathan]

ABS system activates during emergency braking, and it will also trigger when braking hard on wet, icy, or snowy roads. Additional information is as follows: 1. Advantages of ABS system: When the wheel is about to reach the next lock-up point, the brake fluid pressure causes the system to repeatedly engage, acting 60~120 times per second, equivalent to continuous braking and releasing—similar to mechanical 'cadence braking.' Therefore, the ABS anti-lock braking system prevents loss of steering control and wheel skidding during emergency braking, ensuring the wheels do not lock up. This prevents the tires from rubbing against the ground at a single point, thereby increasing friction, improving braking efficiency, reducing brake wear, and extending the service life of brake drums, discs, and tires by up to twice as long. 2. Limitations of ABS system: ABS itself has limitations and cannot overcome certain physical laws. In two scenarios, ABS does not provide the shortest braking distance: one is on smooth, dry roads when braking is performed by an experienced driver, and the other is on loose gravel, dirt, or deep snow-covered roads.