Therefore, when the ABS is working, the driver can feel the vibration of the pedal and hear some noise. After the car decelerates, once the ABS computer detects that the wheel locking state disappears, it will close the main control valve, so that the system will work under the normal braking state. If the pressure in the accumulator drops below a safe limit, the red brake fault light and amber ABS fault light come on. In this case, the driver needs to step on the pedal deeply with greater force to effectively brake the front and rear wheels.
In ABS, a speed sensor is installed 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 judges the motion state of each wheel according to the signals input by each wheel rotation sensor and forms corresponding control instructions. All the hydraulic solenoid valves are not energized and are in the closed state, and the electric pump is not energized to run. 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 The brake pipelines are all in a closed state, and the brake pressure of each brake wheel cylinder will change with the output pressure of the brake master cylinder. At this time, the braking process is exactly the same as that of the conventional braking system.