What are the basic structural components of the ABS system?

[VonReed]

ABS system mainly consists of 4 components: Wheel speed sensor, electronic control unit ECU, hydraulic unit, ABS warning light. The wheel speed sensor detects the motion state of the wheels and sends sinusoidal electronic pulse AC signals, which are then processed by the modulator to convert the pulses into digital signals and transmit them to the electronic control unit. The electronic central control unit ECU receives input signals from the wheel speed sensors, calculates the wheel speed, vehicle speed, and slip ratio based on these parameters, determines the wheel state according to the slip ratio, and issues control commands to the hydraulic unit. The hydraulic unit adjusts the pressure in the brake lines according to the control commands, with the adjustment process including pressure holding, pressure increase, and pressure decrease. The ABS warning light is used to alert the driver to system malfunctions, displaying a fault indicator light on the dashboard.