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| EBD is an automatic control system that electronically optimizes distribution of braking power among the front and rear wheels in relation to changes in total vehicle weight. |
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| An increasing number of world automakers are introducing the EBD system. Ahead of its competitors in the U.S. and Japan, Kia Motors has applied EBD to ABS-equipped vehicles bound for both domestic and overseas markets since 1998. |
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| With the traditional proportioning valve, a mechanical brake fluid pressure distribution system, braking power is distributed to front and rear wheels at a ratio proportional to the pressure applied to the brake pedal irrespective of changes in total vehicle weight. This ratio is determined and fixed in the design stage based on the total weight of the vehicle with only a single occupant - the driver. When the weight on the rear wheels increases, that is, when the number of passengers increases, more braking power is needed. But the braking power of the rear wheels does not increase significantly because the braking power goes up at a fixed rate. The traditional proportioning valve braking system fails to adjust to this need because its braking power increases only in relation to increased pressure on the brake pedal. |
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When EBD is applied, the braking power of the rear wheels adjusts to changes in total vehicle weight, thus maximizing braking power and minimizing increases in braking distance. |
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