How does EBD - Electronic Brake-force Distribution work?

EBD - Electronic Brake Force Distribution

The acronym EBD means Electronic Brake-force Distribution, which we can translate as Electronic Brake Force Distribution. However, what and how does this system work and do we really need it?

You've probably heard of a brake corrector? You are not? And for the fifth brake cylinder? Not even for him? Let's start with a simple and simple language that will be understood by everyone.

What is a fifth brake cylinder?

The correct name is the brake corrector. Its purpose is that depending on the rear axle / wheel load regulates the brake force on the rear wheels. The more loaded the car, the greater the braking force required.

The brake corrector is physically connected to the suspension elements and, based on the lowering of the body due to load, determines how much braking force is required.

However, we know that the vehicle sinks with the front end during hard braking - the front end lowers and the rear end rises, which happens because the mass shifts from rear to front axle.

So, the load on the rear wheels decreases, and now require less braking force to prevent them from locking and losing control of the vehicle.

The brake corrector reacts in such situations by raising the rear end and reduces braking force, returning it to its original level after stopping the brakes and lowering the rear end.

This is a simplified explanation - there could be much more to discuss, including removal in many older cars (after which the owners continue to drive without major problems, and many do not even know that it was removed, or that they ever had one if they purchased a used vehicle).

A "new" idea for an old problem

Because today almost every car under the age of 10 has ABS, and we know that ABS can control the braking force on each wheel individually (if four-channel), the engineers came up with the idea to use this system instead of the classic brake corrector.

This is how the electronic brake-force distribution or EBD. Therefore, EBD cannot exist without ABS-and.

The EBD monitors the data coming from the wheel speed sensor and the oil pressure in the braking system, the data from the vertical axis (drift) sensor that comes with the ESP, steering wheel sensor anje

Based on these data, the computer evaluates which wheels are under smaller and which under higher load and thus determines the optimum braking force.

Keep in mind that there are different types of this system. Some are more advanced and efficient, thanks to better software and the use of data obtained from multiple sensors, more accurate data, faster processing… Others are more primitive and use only hardware ABS-and.

If you are familiar with a more specific explanation of how EBD works at the software level, which would be understandable to the average reader, we invite you to contribute via comment.

EBD - Electronic Brake Force Distribution

What's the difference between ABS and EBD?

EBD can be viewed as software add-on ABS-u, which is able to replace the brake corrector (fifth brake cylinder) and based on different data, an estimate of how much braking force is required by the individual wheels depending on the situation.

So EBD is practically a subsystem ABS-and.

What if EBD breaks down?

In that case he probably broke down and ABS (i ESP/ ESC and if any). The brakes will work as if the car did not have either of these two systems. Of course, we recommend that you visit the service.

 

Dragan Romcevic

Prepared : www.polovniautomobili.com


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