EBD (electronic break distribution, electronic break differential), ABD (automatic break distribution).
Briefly: When the ESP detects that the car is moving in a direction other than that intended by the driver, the EBD applies the wheel brake individually and in varying percentages, depending on the ones that have lost control the most, inside of the curve.
AAbbreviation for “electronic brakeforce distribution”, it is a system that works with ABS and ESP to distribute optimum braking force between the wheels of the car but especially those of the rear axle. Electronic brakeforce distribution (EBFD) or electronic brakeforce limitation (EBL)For this system takes into account the adherence and stability of the car through the moment of rotation sensor. The most delicate moment during braking is that of the transfer of masses to the front which can lead to the rear wheels locking. Here is where the EBD system intervenes, that reduces braking pressure on the rear axle. Thus he helps the ESP functioning in the stage understeer combating.
On vehicles with front wheel drive, the front is heavier than the back so that when applying the brakes, the vehicle’s center of gravity moves to the front. Through this adherence to the rear wheels diminishes significantly and wheels tend to lock. Through brake force distribution, vehicle braking is done more efficiently, and the phenomenon of “wheels lock” is removed.
EBD (EBV) is only an assistant of the ABS. If you have problems with ABS, automatically you remain and without EBD. “Decisions” taken by EBD were based on information gathered by the ABS sensors.
A ABS works in the sense of rear wheel anti-lock and the EBD redistributes brake force for maximum efficiency. As everybody knows in case of car braking the grip is the largest on front axle wheels and in a smaller percentage on rear axle wheels. This percentage can be changed depending of:
– The degree of load and weight distribution in the vehicle;
– The angle of tilt (front and back) of the vehicle when braking.
EBD distributes braking force directly proportional to the load of the wheels It is well known that the vehicle at braking tends to be inclined in front and to get up in the back. As the rear of the vehicle rises more when braking, rear wheels tend to lose grip and lock.
EBD is an electronic system that does not allow the rear axle wheels blocking, having the role of change the braking force created by brake pump and distribute it optimally this pressure between the wheels of the front axle and the rear axle, so as not to create imbalances.
In other words, the EBFD has the role of adjusting dynamic balance when braking between the axles.
The EBD works as follows: when the car is unbalanced, ie most of the times when cornering, the weigh which press on each wheel is not evenly distributed. So some wheels will be more “loaded” and others more unloaded. From physics is known that the friction force (force on which is based the friction) varies in direct proportion to the weight and the friction coefficient. The coefficient of friction is the same on all four wheels (in conditions of normal asphalt) braking force varies depending on the weight which pressing on each wheel.
Thus, when making a turn, the wheels on the inside of the turn will have a lower load due to centrifugal force acting on the car’s center of gravity, and their force friction with the ground will be smaller than those on the outside edge and they will tend to block more quickly than those on the outside. The EBD’s work simultaneously with the ABS in the sense that ABS takes care not to lock the wheels and the EBD takes care to apply a braking force variable on each wheel depending on grip conditions it has each wheel and hence greater safety and efficacy in braking in limit situations.
ABS prevents the wheels from locking during braking. EBD complements this action through optimizing the distribution of braking forces on each wheel to compensate for differences on load. Together, these two systems allow keeping the car direction during hard braking.