Abstract
In this paper, we propose a new control strategy for an antilock braking system (ABS) to maintain the braking force at maximum. The popularization of the ABS that prevent the wheels from locking has resulted in an improvement of the vehicle stability and shortening the braking distance. Further improvement is anticipated if the maximization of the braking force is realized. We found an interesting phenomenon in which the characteristics of the resonance system composed of the vehicle body and the wheel and road surface reflect the slip condition of the road surface. Using this phenomenon for controlling the braking pressure, we realized a control method for maintaining the maximum value of the braking force.