What is EBD?

 Electronic brakeforce distribution (EBD or EBFD), sometimes known as electronic brakeforce limitation (EBL), is a braking system that automatically adjusts the amount of force given to each of a vehicle's wheels based on road conditions, speed, load, and other factors. EBD can deliver more or less braking pressure to each wheel in order to enhance stopping force while retaining vehicle control. It is always used in conjunction with anti-lock braking systems (ABS).  Because the front end of the vehicle bears greater weight, EBD applies less braking power to the back brakes, preventing the rear brakes from locking up and causing a skid.  In some systems, EBD distributes more braking pressure at the rear brakes during initial brake application before the effects of weight transfer become apparent.

"As a subsystem of the ABS system, the EBD's function is to govern the rear wheels' effective adhesion usage. In a partial braking operation, the pressure of the rear wheels is approximated to the optimum brake force distribution. To accomplish this, the traditional brake design is tweaked in the direction of rear axle overbaking, and ABS components are utilized. EBD decreases the load on the vehicle's hydraulic braking force proportioning valve. In terms of adhesion usage, driving stability, wear, temperature stress, and pedal effort, EBD optimizes the brake design."

To reduce yaw accelerations during corners, EBD may be used in conjunction with ABS and electronic stability control (ESC). ESC uses a yaw rate sensor to correlate steering wheel angle to vehicle turning rate. The rotation of the vehicle around its vertical center of gravity is referred to as "yaw" (turning left or right). The automobile is understeering(oversteering) if the yaw sensor detects less(more) yaw than the steering wheel angle should produce, and ESC engages one of the front or rear brakes to spin the car back into its planned route.

For Example, If a car is performing a left turn and begins to understeer (plows forward to the outside of the turn), ESC engages the left rear brake, which assists in turning the car left. Because the sensors are so sensitive and the actuation is so fast, the system may be able to adjust the course before the driver reacts. To make ESC operate efficiently and simply, ABS and EBD work together to avoid wheel lock-up and deliver adequate braking power.