The need for mobility is increasing and the traffic on the road is becoming heavier and heavier. Critical traffic situations, such as sudden traffic jams or obstacles on the road, are becoming more and more common. In some cases, only emergency braking can save the day here. In such situations the ABS active safety system intervenes to help.
In an emergency braking situation the braking force created by the driver may be greater than the tyre can handle: the wheel locks. The tyre can now no longer transfer any lateral traction forces. The vehicle becomes unstable and unsteerable. The stopping distance increases.
In a vehicle equipped with an Antilock Braking System, the ABS control unit constantly evaluates the speed of all wheels. If the ABS wheel-speed sensors placed at each wheel detect a lock-up, ABS intervenes within milliseconds by modulating the braking pressure at each individual wheel. In this way ABS prevents the wheels from locking during braking, thus ensuring steerability and stability combined with the shortest possible braking distance.
ABS also prevents tyre damage. Locked wheels on dry asphalt can create flat spots. The tyres can then no longer ensure optimal braking.
To understand How ABS works see this: