The electronic brake force distribution system EBD is a continuation and improvement of the four-channel ABS system (anti-lock braking system). ABS prevents the wheels from locking when sudden braking, EBD helps to drive the machine constantly, and not just at the moment of impact on the brakes. The system strictly doses the braking force on all four wheels of the car, using information from sensor devices of the anti-lock system.
In the case of unexpected braking, when the motorist sharply presses on the brake pedal, the center of gravity of the vehicle is transferred forward, and the load on the rear two wheels decreases. The load on all wheels in this situation is the same, so if the car owner does not take care of the EBD – the rear of his car can be blocked. This is fraught with drifts on corners, loss of control – the car will heel under the influence of lateral forces. It is necessary to monitor braking forces and correctly distribute them, if the car often transports loads and passengers.
Since EBD is an “improvement” and “logical continuation” of ABS, the history of the origin of these electronic systems is the same. Soon, according to experts, the two systems will be ubiquitously integrated into a single complex. This design is already used on the “Citroen C4” and “Hyundai Grandeur”.
The problem of locking the wheels arose with the advent of the first vehicles – railway steam engines. Blocked rear wheels lead to an increase in the braking distance, a decrease in driving performance, the appearance of defects, etc. With immobilized wheel pairs, the cars often lurched to one side, descended from the rail. The problem was learned to solve by automatic adjustment of braking forces or “cargo auto-mode”.
During the same period, mechanical cable brakes were installed on passenger cars. They demanded great physical strength from the driver: the owner of the car hit the brake system, thereby blocking the rear wheels. A little has been remedied by the hydraulic vacuum braking system, but it is impossible to develop an efficient braking system without electronics. Only an electrical impulse can prevent the center of gravity from shifting in fractions of a second.
Important dates of the “brake system history”:
Any driver had to simultaneously travel around the obstacle, suddenly appeared on the way, and brake. Adjust the trajectory while it is quite difficult: if you press the brake harder than you need – the wheels will fail. And if you need to brake at a turn or on a slippery surface like ice, then one anti-lock system may not be enough. The action of the EBD system applies to each wheel separately.
The “expansion” of the anti-block braking system solves the following tasks:
The EBD system exists on the basis of ABS. It includes such components:
If the car is transporting people / cargo, then a strong shift of the center of gravity to the front axle of the machine will not work even with sudden braking. In this case, the effort will be distributed more evenly.
The main advantage of the electronic brake force distributor is the fact that it allows the driver to safely brake in case of any external factors. Without ABS, not everyone can safely unlock the wheels with one touch of the foot. EBD is triggered automatically, even long turns are not afraid of it.
The system is part of the “electronic intelligence” of the machine. Many of its processes are automated. Hundreds of specialists are working to ensure that the active security system, including the braking system, is improved every day. To date, the speed of the anti-lock system has increased tens of times, and weight and cost – have decreased. The first brake systems weighed up to seven kilograms, and the current ones – only one and a half kilograms. One example of such an improvement is EBD. A competently tuned system helps save about 20% of the braking distance and provides the ability to maneuver. Sometimes from a few meters on the uneven track depends on health, and even the life of the driver and his passengers.
The main disadvantages of ABS- EBD experts call these moments:
“ABS-EBD” is help for newcomers, a guarantee of their safety on the road, their sense of confidence. That is why in modern cars the anti-lock system is built-in without fail. The owners of a used car should check the availability of this innovation on the day of purchase – you just need to press the brake signal. The system is activated and “responds” to weak, but perceptible shocks in the leg.
But buying a car with a “brake complex”, it is worth to test it on different surfaces – homogeneous and heterogeneous, and in different conditions. The speed should be constantly changed. This will give a clear understanding of how the machine, equipped with an electronic brake force distribution system, will behave.
Date: 10.10.18 Views: 132