Patent ID: 8315754

Claim:
A vehicle brake controller for a vehicle having a brake pedal and a plurality of wheels comprising: a master cylinder housing a brake fluid at a master cylinder brake pressure level; an input member that moves within a master cylinder responsive to movement of the brake pedal to adjust the master cylinder brake pressure level; an assist member that moves within the master cylinder independent of but relative to the input member to further adjust the master cylinder brake pressure level; a biasing member that biases the assist member and the input member to have a prescribed relative position relationship; a motor that applies a driving force to the assist member to move relative to the input member based on displacement of the input member; a braking force booster that boosts the driving force of the assist member in the master cylinder; a frictional braking device that applies a frictional braking torque to each wheel according to the master cylinder brake pressure level; a regenerative braking device that applies a regenerative braking torque to each wheel; a regenerative braking torque change rate detector that detects a rate of change of the regenerative braking torque; a regeneration coordination controller that executes a regeneration coordination control operation to control the frictional braking torque and the regenerative braking torque so that the total braking torque meets a braking torque demand, the total braking torque including the frictional braking torque and the regenerative braking torque; and an assist driving force corrector that corrects displacement of the assist member with respect to the displacement of the input member according to the rate of change of the regenerative braking torque during the regeneration coordination control operation.