What does the ABS system in a car mean?
1 Answers
ABS, short for Antilock Brake System, functions by automatically controlling the braking force during car braking to prevent wheel lock-up. It keeps the wheels in a state of rolling and sliding (with a slip ratio around 20%), ensuring maximum traction between the wheels and the road. Classification of ABS: ABS is primarily classified based on channels. In ABS, the brake pipelines capable of independently adjusting brake pressure are referred to as control channels. ABS systems are categorized into four-channel, three-channel, two-channel, and one-channel configurations. One-channel ABS: Also known as single-channel ABS, it features a single brake pressure regulator in the rear wheel brake assembly and a wheel speed sensor installed on the rear axle differential (some versions have one sensor on each rear wheel). Two-channel ABS: This configuration struggles to balance directional stability, steering control, and braking efficiency, making it rarely used today. Three-channel ABS: It independently controls the two front wheels while jointly controlling the two rear wheels based on the low-select principle (i.e., both wheels are controlled by one channel to ensure the wheel with less traction does not lock), also known as hybrid control. Four-channel ABS: Equipped with four wheel speed sensors, it includes a separate brake pressure regulator in the pipeline to each wheel's brake cylinder, enabling independent control for a four-channel configuration.
