ABS anti-lock braking system principles and tips

â–  The importance of ABS

From the name point of view, the function of the ABS anti-lock braking system is obvious and simple, which is to prevent the tire from deadlocking during braking. But why prevent tire deadlock? A deadlocked, non-scrolling wheel is simply not able to turn away from danger, so use ABS to prevent this from happening.

Many drivers often reflexively apply pressure to the brakes when they are in an urgent state of deceleration. The driving state of the car is only in contact with the ground with four wheels. As long as the brakes are sharply decelerated, it may be possible to make the brakes. Tire grip is affected, so that the steering function is weakened, which in turn leads to control errors, and more serious will cause the tire to deadlock and even cause the vehicle to run out of control.

There are several situations in which the emergency brake causes the tire to be deadlocked. If the front wheel is deadlocked, it will cause the driver to control the steering wheel and the steering system will not be able to properly control the travel route; if the rear wheel is deadlocked, the vehicle will fall into two poles. In the state of transition, it is not the case that a sudden flick of a tail throw is a serious shortage of steering. As for all four deadlocks, the car will only slide straight in the direction of its original progress. At this time, the steering wheel is completely inactive. After a long period of research, automotive design engineers hope to maximize tire grip so that braking efficiency can be maximized while maintaining steering capability. This is the origin of the ABS invention.

ABS is mainly the use of electronic control technology and hydraulic components combination to control the braking force action, so as to avoid the above-mentioned wheel deadlock situation. The operation process of the system itself is controlled by an electronic control system (ECU) and can receive signals from different sensors in various parts of the vehicle itself.

Vehicles equipped with ABS systems can steer and move safely along the track even if they brake. Without ABS, it is easy to slip out of the lane due to braking, especially on slippery roads.

• Vehicles that are not equipped with ABS are liable to deadlock the wheels during emergency braking and the vehicle will run straight out of the runway, with no ability to avoid danger.

â– The principle of ABS

The function of the ECU is to control the ABS actuators to increase, maintain or reduce the brake fluid pressure on each wheel. Each wheel is equipped with a speed (vehicle speed) sensor, which transmits the wheel's speed signal to the ECU. Once the braking force is too large and the wheel may be deadlocked, the ECU will send a signal to the ABS actuator to lower the brake. The amount of oil pressure, when the soon-to-be-dead tyre is braked and released, naturally restores grip control.

If the ECU senses that the vehicle speed continues to increase during braking, if the ECU immediately senses that the vehicle speed continues to increase, the brake fluid pressure will be immediately applied and the wheel will decelerate and then let go. This continues the deadlock and then releases the action. Within a second, it can be continuously pressurized and released for several dozen times, so that the vehicle can be quickly decelerated without the tire deadlock being able to dodge obstacles.

â–  Bigfoot in the end but many people think that with ABS, light on the brakes on the line, anyway, ABS will help brake it! This is definitely a big mistake! First of all, the main function of ABS is not to shorten the braking distance; although in some cases, this effect, but the main function of ABS is to provide the maximum braking force, but also to maintain the steering ability of the front wheel, you can dodge the danger .

In the wet road, it can highlight the importance of ABS.

Second, in light braking, ABS does not work at all unless there is a tire slip on a slippery surface. In other words, in the event of an emergency, the Bigfoot brakes can be used in order to really play the role of ABS. At this time, the driver should not be shocked by the sudden powerful braking force, and he must calmly avoid the immediate danger.

In addition, in order to prevent the electronic system from malfunctioning, when the ECU control system detects that the ABS is unable to operate normally, the instrument panel warning light will light up. At this time, the ABS brake system will return to the traditional brake system operation mode. In other words, the ABS signal light on the instrument panel will not be on. When the light signal is on during driving, it is best to promptly enter the factory for repair. This will allow this advanced strain system to protect our lives in the event of an accident. Safety.

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