The correct operation of the ABS system is that when braking suddenly, the system will automatically start and adjust the braking force, and the driver will feel the regular vibration of the brake pedal, which is the feedback of ABS activation. If the ABS light comes on, it may be due to a self check program or a malfunction, and it should be checked as soon as possible. Although the ABS system can significantly improve driving safety, it is not omnipotent and may not fully prevent slipping in extreme road conditions. Therefore, improving driving skills and safety awareness are equally important. With the development of technology, the future ABS system may become more intelligent and precise, automatically adjusting its working mode based on road conditions, vehicle speed, and other information, providing more personalized safety protection.
Anti lock braking system (ABS)
This is a new technology that only emerged and applied in the late 1980s, but has developed rapidly and has become a must-have for many sedans. According to statistics, when a car suddenly encounters a situation of braking, more than 90% of drivers often press the brake pedal all the way to make a sudden brake. At this time, the car is very prone to pure slip and side slip, commonly known as "tailspin", which is a phenomenon that is very easy to cause accidents. There are many reasons that can cause car sideslip, such as driving speed, ground conditions, tire structure, etc. However, the fundamental reason is that during emergency braking, the rolling friction between the wheels and tires and the ground suddenly turns into sliding friction, and the tire's grip is almost lost. At this moment, even if the driver turns the steering wheel, it will be of no use. As early as the 1960s, automotive experts developed a set of anti slip braking devices for vehicles, such as ABS, to address the root cause of this phenomenon of sideslip
Mainly composed of speed sensors, pumps, solenoid valves, and controllers.
Vehicle speed sensor
The anti lock braking system needs to use some means to understand when the tires will lock up. The speed sensor installed on each tire (in some cases in the differential) can provide this information.
Solenoid valve
Each brake system controlled by ABS has a solenoid valve in the brake line. For some braking systems, solenoid valves can be in three positions:
At position 1, the solenoid valve is in an open state; The pressure from the master cylinder is directly transmitted to the braking system.
At position 2, the solenoid valve blocks the pipeline, isolating the braking system from the master cylinder. If the driver forcefully presses the brake pedal, this will prevent the pressure from continuing to rise.
At position 3, the solenoid valve releases some of the pressure from the braking system.
pump
Since the solenoid valve can release the pressure of the braking system, there must be a way to restore the pressure. The pump is working at this moment. If the solenoid valve reduces the pressure in the pipeline, the pump can restore pressure.
controller
The controller is a computer in a car. It can monitor the speed sensor and control the solenoid valve.
