ABS is the English abbreviation of “Brake Anti-lock Brake System”. In the absence of ABS, if emergency braking will cause the tires to lock up (the wheels cannot turn), the braking distance will become longer, and it will be easy to run off or flick the tail. ABS controls the locking of the wheels by controlling the retraction and release of the brake oil pressure, so that the vehicle is always in a critically locked gap rolling state.
Most cars now have ABS (anti-lock braking system) as standard configuration, but if you really understand the main function of ABS, know what ABS can do, there are not many such people, so there are some Misunderstanding.
Everyone who has driven a car without ABS knows that if you step on the brake pedal to the end in an emergency, you can hear the tires screaming, so two black tire marks are left on the road. This is because of the wheels. Can not rotate (called “wheel lock” in technical terms) and left by sliding friction with the road surface.
In fact, the wear of the tires is of secondary importance. Once the wheels are locked, the car can easily lose control, resulting in dangerous situations. If the front wheel locks up, the most direct thing is the loss of steering ability. At this time, turning the steering wheel will not help at all. You can only pray that the car will stop as soon as possible!
If the rear wheel locks up, the steering ability does exist, but it is very likely that the rear wheel will slip, and in severe cases, there will be a tail flick. Once the car slips or flicks, especially at high speeds, the body will completely lose control and can only be resigned!
Based on the lock of the wheels during braking, the driver will lose control of the car, thus causing the drivers and passengers The safety of life is seriously threatened, so how can we effectively solve the situation of wheel lock during braking? ABS (Anti-lock Brake System) was born from this.
As the name implies, the anti-lock braking system means that the wheels will not lock when braking.
It is conceivable that when the driver quickly depresses the brake pedal during emergency braking, the front wheels will not lock up and the steering ability still exists, so measures can be taken to avoid the danger ahead when braking. If the rear wheels will not lock up, side slips and tail flicks will not occur, and the control of the body is still in the hands of the driver.
After a simple analysis in front, it can be concluded that the most important function of ABS is not to shorten the braking distance, but to maintain the directional stability of the car when braking.
When the anti-lock braking system is working, the friction between the wheels and the road is rolling friction, which will make full use of the maximum adhesion between the wheels and the road to brake, thereby increasing the braking deceleration and shortening the braking distance. The important thing is to ensure the directional stability of the car.
When ABS is working, it is equivalent to braking at a very high frequency. Therefore, if you step on the brake pedal in an emergency, you will definitely feel the brake pedal trembling, and you will also hear the “click” sound from the master cylinder. , This is the ABS is working normally. Since the master cylinder is constantly adjusting the brake pressure, there is a continuous feedback force to the brake pedal. Therefore, in this case, we must “unswervingly” step on the brake pedal and take active measures to avoid danger.
In short, ABS is only an auxiliary safety system, and its role is very limited. Therefore, you must not rely on these systems 100%. Only safe driving is the most important.
