How does the ABS in a car work?

[McZachary]

The working principle of the ABS in a car is: during emergency braking, the highly sensitive wheel speed sensors installed on each wheel detect wheel lock-up. The computer then immediately controls the pressure regulator to release pressure from the wheel's brake cylinder, preventing wheel lock-up. The ABS system consists of an ABS pump, wheel speed sensors, and a brake switch. The functions of the ABS system are: 1. To prevent loss of vehicle control, increase braking distance, and improve vehicle safety; 2. To enhance the overall braking performance of the vehicle; 3. To prevent wheel lock-up during braking; 4. To ensure the driver can control the direction during braking and prevent rear axle skidding.

[LeilaniLee]

The working principle of ABS is actually quite straightforward, like having a smart assistant helping you manage braking. When you slam on the brakes while driving, the wheels can easily lock up, causing loss of control. However, ABS uses sensors on the wheels to monitor speed changes multiple times per second. If a wheel slows down too quickly and is about to stop rotating, the ABS computer immediately commands the hydraulic unit to reduce the brake pressure on that wheel, allowing it to regain rotation. Then, it quickly reapplies pressure to continue braking. This process repeats multiple times, resembling rapid pumping of the brake pedal, preventing lock-up. This way, the car can stop smoothly, and you can still steer to avoid danger. Once, during heavy rain on the highway, ABS saved me from a rear-end collision by enabling an emergency stop. So, the key is maintaining traction and steering capability, especially on slippery roads, significantly reducing accident risks.

[LeLandon]

The ABS system primarily operates through the collaboration of several components: sensors monitor wheel speed, the electronic control unit analyzes data, and if an abnormal drop in wheel speed (indicating impending lock-up) is detected, it sends signals to the hydraulic module. The hydraulic module uses solenoid valves to rapidly open and close, modulating brake pressure in pulses to prevent wheel lock-up while maintaining effective braking. Though it sounds highly technical, in actual driving it's quite simple – during hard braking, the pedal will vibrate slightly; don't release it, let the system work automatically. The benefits of ABS extend beyond just shortening braking distances; it also maintains stability during cornering or on icy surfaces. I often remind friends to regularly check the ABS warning light and keep sensors clean to ensure safety.

[RyderFitz]

The ABS (Anti-lock Braking System) works simply by preventing the wheels from completely stopping during braking. The system monitors the speed of each wheel using sensors. When it detects that a wheel is about to lock up, it automatically reduces the braking force on that wheel, allowing it to continue rolling slightly before reapplying the force. By repeating this process, the wheels avoid locking up, preventing skidding or loss of control. In an emergency, firmly press and hold the brake pedal—the ABS will handle the fine adjustments. It's particularly useful in rainy or snowy conditions, helping you stop steadily and steer around obstacles. As a common feature, remember that ABS relies on sensors and circuits, so pay attention to these components during maintenance.