What does the ABS warning light on the car dashboard indicate?
1 Answers
The ABS display on the dashboard indicates a malfunction in the vehicle's Anti-lock Braking System. ABS, fully known as the Antilock Brake System, functions by automatically controlling the braking force during vehicle deceleration to prevent wheel lock-up. It maintains the wheels in a rolling-sliding state (with a slip ratio of approximately 20%) to ensure maximum traction between the tires and the road surface. Components of the ABS system: The ABS system primarily consists of four components: wheel speed sensors, the electronic control unit (ECU), the hydraulic unit, and the ABS warning light. The wheel speed sensors detect the motion state of the wheels and generate sinusoidal electronic pulse signals. These signals are then processed by a modulator, converted into digital signals, and transmitted to the electronic control unit. The electronic central control unit (ECU) receives input signals from the wheel speed sensors and uses these parameters to calculate the wheel speed, overall vehicle speed, and slip ratio. Based on the slip ratio, it determines the wheel's condition and issues control commands to the hydraulic unit. The hydraulic unit adjusts the pressure in the braking lines according to the control commands, with the adjustment process including pressure maintenance, pressure increase, and pressure decrease. The ABS warning light alerts the driver to any system malfunctions.
