The driver perceives the action of the ABS as a slight vibration of the brake pedal. In modern ABS systems such as those employed in all SEAT models, this process takes place several times a second. The car remains stable and steerability is maintained. If one of them threatens to lock, a solenoid valve in the control unit of the ABS reduces brake pressure for the respective wheel until it runs freely again, then the pressure is again increased up to the locking limit. To prevent this from happening, the ABS control unit monitors the rotational speed of all wheels of the car by means of wheel speed sensors. Locked wheels can no longer transmit cornering forces, the car does not respond to steering commands. Under emergency braking conditions or slippery road surfaces, the anti-lock brake system (ABS) prevents the wheels from locking and maintains the car's steerability.
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