What does the antilock brake system monitor to prevent skidding and lock-up?

The antilock brake system (ABS) is designed to enhance vehicle safety by preventing wheel lock-up during braking, which can lead to skidding and loss of steering control. To achieve this, the system continuously monitors wheel speed, brake pedal position, and brake pressure.

Monitoring wheel speed is crucial because it allows the system to detect when a wheel is about to lock up. If a wheel's speed decreases more rapidly than others during braking, the ABS can intervene by modulating brake pressure. The monitoring of brake pedal position helps the system determine how hard the driver is attempting to stop the vehicle, enabling it to respond appropriately. Finally, monitoring brake pressure ensures that the ABS can maintain optimal braking force by releasing and reapplying pressure to the brakes as needed to prevent skidding.

By integrating these three factors, the antilock brake system effectively manages braking force, improving vehicle control during hard stops or in slippery conditions. This comprehensive monitoring allows the system to react quickly to changing conditions and driver inputs, which helps maintain traction and stability.