BRAKE BOOSTER FOR REGENERATIVE COORDINATION CONTROL

摘要

PROBLEM TO BE SOLVED: To provide a brake booster for a regenerative coordination control maintaining wheel braking pressure lower than the pressure equivalent to pressing force by prescribed pressure without depending on electronic control both at additional actuation and loosening of a brake and causing no incongruity feeling in operation.;SOLUTION: Hydraulic pressure circuits in the side of a reaction chamber 5 and in the side of an output pressure chamber 6 are separated in a control valve 3, and a variable relief valve 7 is provided between the reaction chamber 5 and the output pressure chamber 6. By means of the variable relief valve 7, the wheel brake pressure is maintained lower than the pressure equivalent to the pressing force by the prescribed pressure both at additional actuation and loosening of the brake, and the use of the electronic control following brake operation for imparting priority to regenerative braking force is eliminated.;COPYRIGHT: (C)2004,JPO