IN SPEED

Anti-lock braking system ABS is one of the active safety systems, vehicle. Its function is to avoid blocking the wheels under braking, and thus the loss of adhesion between and around the ground. The aim of a benefit to the ABS braking system is that the vehicle is operable even with a sharp braking.

Anti-lock braking system ABS is one of the active safety systems, vehicle. ABS prevents the wheels blocking during braking wheel is still odvaluje thereby avoiding a loss of adhesion between and around the ground. Revolving the wheel allows for the maintenance of stability, handling and controllability of the vehicle limit situations (such as sudden braking or when braking on slippery road). Disabled wheel had not passed any lateral strength and does not allow turn.

avoidance maneuver the vehicle with ABS and vehicles without ABS
Source: www.whnet.com

The system prevents the wheels blocking during braking that automatically regulates the braking force in the stirrups so as to avoid blocking the wheels. Blocking the wheels lost adhesion and the vehicle would have happened uncontroled, could not be allowed to amend the motion by turning the steering wheel.

Each round has its own speed sensor, which gives the control unit information on the rotational speed of each wheel. When the control unit receives a signal that the wheel is blocked, short-term decrease pressure in the brake system in order to bring back wheel in motion. ABS system may do so by 12–16 × per second, thereby ensuring relatively still turn the wheels and controllability car (see Note controllability car. Kammo circle). Thus, in the braking system ABS braking force to maintain the adhesion. There is a blockage of the wheels and the subsequent release of quick succession in a row to stop the vehicle.

essential part of ABS
Source: http://www.musclecarclub.com

Each wheel is equipped with an induction sensor speed, see the picture of the text yellow sensor in the brake discs. This gives the control unit information about the movement of the wheels. Control unit (gray box) assesses the situation and the regulatory valve (brown in the upper part of the picture) possibly reducing pressure in the brake system.

Source: Škoda Auto a.s.

ABS system has been developed by Bosch in 1978. History, however, goes back even further. Already at the beginning of the 20th century, there were considerations about how it would be possible to avoid wheel lock in sharp braking. The company Bosch announced in 1936 a patent for „equipment to prevent the strong braking wheel motor vehicles.“ But only with the advent of e-management engineers to develop antilock braking system, which was fast enough and robust for use in motor vehicles. The first commercial application of the system found a special equipment vehicle Mercedes-Benz S-class and briefly on the 7th for BMW series.

The company Bosch ABS system, however, developed further. As a result of further developments arising systems ASR (protiprokluzovací system that prevents wheel protáčení in rozjíždění), electronic stability program ESP. In recent years, appears ABS along with EBV (Electronic braking force distribution).

How to know the activities of ABS?
When a sharp brake on the adhesion comes the flashing brake, for example, on a wet road. Interruptions caused by its activities, the ABS when forgiving pressure in the brake system. This reduces the braking force and unblock the round. Pedal of this activity, like kicking and the longer braking falling to the floor. Few experienced driver could recoil and allow the brake pedal, it would, however, was a mistake!

The stopping distance on a wet road.
On a dry road the vehicle without ABS shorter stopping distance. On the wet ground has already settled differences and icy surface of the vehicle with ABS braking distance is shorter. An important advantage, however, remains above the possibility of driving while braking.

ABS braking system
Source: http://media.ford.com

publication of article:29. December 2008 | inclusion of article: Abbreviations-and-terms

translated from the Czech original by automatic translation

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