After the car decelerates, once the ABS computer detects that the wheel lock state disappears, it will let the main control valve close, so that the system will work in a normal braking state. If the pressure in the accumulator falls below the safe limit, the red brake fault indicator light and the amber ABS fault indicator light come on. In this case, the driver needs to perform a deep pedal-type braking method with greater force to effectively brake the front and rear wheels.
In ABS, a speed sensor is placed on each wheel, and the signal about the speed of each wheel is input to the electronic control device. The electronic control device monitors and determines the motion state of each wheel according to the signal input by each wheel rotation sensor, and forms corresponding control instructions. The hydraulic solenoid valves are not energized and are in a closed state, and the electric pump is not energized. The brake pipelines from the brake master cylinder to each brake wheel cylinder are in a communication state, and each brake wheel cylinder to the fluid reservoir is in a state of communication. The brake pipelines are in a closed state, and the braking pressure of each wheel cylinder will change with the output pressure of the brake master cylinder. The braking process at this time is exactly the same as that of the conventional braking system.