Electronic control of braking force distribution for vehicles using a direct adaptive fuzzy controller

In brake systems, a proportioning valve(P. V), which reduces the brake line pressure on each wheel cylinder for the anti-locking of rear wheels, is cl osely related to the safety of vehicles. However, it is impossible for curr ent P. V. s to completely control brake line pressure because, mechanically , it is an open loop control system. In this paper we describe an electroni c brake force distribution system using a direct adaptive fuzzy controller in order to completely control brake line pressure using a closed loop cont rol system. The objective of the electronic brake Force distribution system is to change the cut-in-pressure and the valve slop of the P. V in order t o obtain better performance of the brake system than with mechanical system s.