What does ABS mean?
1 Answers
ABS, the full name is Anti-lock Braking System, its function is to automatically control the braking force of the brake during vehicle braking, preventing the wheels from locking up and maintaining a state of rolling and sliding (with a slip ratio of about 20%), ensuring maximum adhesion between the wheels and the road surface. The ABS sensor is located on the inner side of the car tire and can be seen by lifting the vehicle. The ABS system mainly consists of four parts: wheel speed sensor, electronic control unit (ECU), hydraulic unit, and ABS warning light. The wheel speed sensor detects the motion state of the wheel, emits a sinusoidal electronic pulse AC signal, which is then processed by the modulator to convert the pulse into a digital signal and transmitted to the electronic control unit. The electronic central control unit (ECU) receives the input signal from the wheel speed sensor, calculates the wheel speed, vehicle speed, and slip ratio based on this parameter, judges the wheel state according to the slip ratio, and issues control commands to the hydraulic unit. The hydraulic unit adjusts the pressure of the brake pipeline according to the control commands, with the adjustment process including pressure holding, pressure increasing, and pressure reducing. The ABS warning light is used to alert the driver whether the system has a fault. If the ABS warning light is on, it is recommended not to continue driving, because the ABS light indicates a fault in the vehicle's anti-lock braking system. During emergency braking, if the wheels lock up, the vehicle may lose control and skid, making it impossible for the driver to slow down or adjust the vehicle's trajectory, posing significant safety hazards.
