What is the working process of the ABS system?

[EllaRose]

Here is the relevant information about the working process of the ABS system: 1. ABS stands for Anti-lock Braking System, which uses wheel speed sensors to monitor the rotational speed of each wheel. When one of the wheels is about to lock up, the system reduces the brake pressure on that wheel. When the wheel is about to rotate again, the system increases the brake pressure, effectively simulating a pumping action. The ABS system can operate 60 to 120 times per second. 2. The ABS system was developed to allow drivers to maintain control of the vehicle's trajectory via the steering wheel even during emergency braking. If hard braking causes all four wheels to lock up, the vehicle may skid uncontrollably, and the driver will lose the ability to steer. ABS enables the driver to steer while braking hard, allowing the vehicle to slow down and avoid obstacles. 3. The ABS system has become a standard safety feature in modern vehicles and often works in conjunction with the EBD system. EBD stands for Electronic Brakeforce Distribution. EBD can distribute braking force to each wheel. If a wheel is rotating too quickly, EBD can detect this through the wheel speed sensor and apply braking force to that wheel. EBD also plays a role during cornering, ensuring stability. The presence of the EBD system significantly improves braking balance.

[JudahMarie]

I've been driving for over a decade and have encountered ABS activation many times. Simply put, when the wheels are about to lock up during braking, the system takes over. Each wheel has a sensor monitoring its speed. When the computer detects that a wheel is rotating too slowly and is about to lock, it immediately commands the solenoid valve to release some brake fluid pressure, allowing the wheel to continue rotating briefly before reapplying pressure to continue braking. This cycle repeats over a dozen times per second, preventing the tires from completely locking up and skidding while maintaining steering control. It's like a professional race car driver's technique of pumping the brakes, except the machine reacts faster and more precisely. You can feel the brake pedal pulsating during emergency braking on rainy days—that's the ABS at work. Remember, don't release the pedal when it pulsates; keep pressing firmly to let the system do its job.