EBD: what is it in a car

When reviewing the current passenger car market and buyers, the question arises what is EBD in a car and what function does the system with this abbreviation perform. The abbreviation EBD stands for Electronic brake-force distribution (in German models EBV - Elektronishe Bremskraftverteilung) - this is a brake force distribution system, is a software addition to the traction control system (ABS) familiar to many motorists.

Unlike pure ABS, the ABS + EBD linkage controls the vehicle's behavior in all driving modes, including emergency braking. It is important to understand that EBD is not a mechanism, but specially developed software, a kind of controller of ABS actions. Leading car manufacturers have been installing the EBD system on cars (not only cars, but also motorcycles and heavy trucks) since the early 90s, when it was noticed that the classic anti-lock braking systems installed on new models often do not cope with their tasks and perform incorrect actions, which can lead to sad consequences.

Why EBD is needed

Illustration of the brake force distribution using EBD (Electronic brake-force distribution)

EBD is a system that, by distributing braking forces to different wheels, helps the driver to keep the car on the desired trajectory. When cornering, the system does not allow the car to skid or dangerously change the trajectory (stall). Another task of EBD is to regulate the behavior of the anti-lock braking system on mixed roads, optimize its effect and prevent unnecessary or insufficient interference of the electronics in the control process.

Here are some examples of when the EBD system can be useful:

  • In emergency braking.
  • When braking on mixed surfaces. For example, when one side of the car drives onto the side of the road or an area with a surface other than the road.
  • When braking when cornering, distributes the load to the brakes to keep the vehicle in balance.

The principle of operation of EBD

The electronics use sensors to determine the change in the speed of a particular wheel or pair of wheels, which occurs when the car hits a difficult surface, for example, on an area with ice or water. By analyzing data from the sensors, the EBD system determines the degree of adhesion to the road surface of each of the wheels and decides on the distribution of the braking force. After that, the valves are commanded to strengthen or weaken the work of the brake discs. After balancing the braking forces, the EBD stops working and allows the driver to freely maneuver and change the trajectory.

See also: What isESP and how it differs from EBD.

EBD video

See also: What isECU in the car and what functions does it performs.

Advantages and contribution to safety

The EBD system has no pronounced disadvantages, and experts note a number of advantages in its use:

  • the optimal choice of the coefficient of adhesion to the road of the rear wheels under any road conditions;
  • control and improvement of ABS operation, increasing vehicle stability;
  • reducing the degree of wear of brake pads and discs, increasing their service life, compliance with temperature operating conditions;
  • Reduction of the required effort when the driver presses the brake pedal.

The International Traffic Safety Committee at the United Nations noted the EBD's invaluable contribution to road safety and the health and safety of motorists, passengers and pedestrians.