Patent ID: 8818672

Claim:
A brake control apparatus, comprising: an operation amount detector for detecting an operation amount of a brake pedal; an electric motor for moving a piston of a master cylinder; a hydraulic pressure detector for detecting a brake hydraulic pressure in the master cylinder; and a control device for setting, depending on the detection by the operation amount detector, a target hydraulic pressure of the master cylinder, and controlling, based on a detected value of the hydraulic pressure detector, an action of the electric motor so that the master cylinder attains the target hydraulic pressure, wherein: the control device connects to fluid amount detection means for detecting a value relating to a discharged fluid amount of the master cylinder; and the control device is configured to: update, when the hydraulic pressure detector is normal, based on the detected value by the hydraulic pressure detector and a detection result by the fluid amount detection means, a brake characteristic representing a relationship between the brake hydraulic pressure of the master cylinder and the value relating to the discharged fluid amount; and calculate, when the hydraulic pressure detector is abnormal, by using the brake characteristic, a value relating to a target discharged fluid amount corresponding to the target hydraulic pressure of the master cylinder, and control the action of the electric motor so that the detected value by the fluid amount detection means attains the value relating to the target discharged fluid amount.