The braking system works most effectively when the tire has maximum friction on the road surface. To brake, the tire must transfer a certain amount of friction to the ground, causing it to slide on the road surface. Thus, the circumferential speed of the wheel remains less than the speed of the vehicle.
In a certain braking mode, the braking force transmitted by the wheel is of the greatest importance. However, when going beyond its limits, the wheel locks up and the friction force with the ground decreases.
The role of ABS is to immediately limit and maintain the braking action of each wheel within the optimal braking mode when the road surface changes.
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