Electric brake apparatus

An electric brake apparatus comprising:

• an electric actuator configured to be activated so as to generate a braking hydraulic pressure in a master cylinder of a vehicle;
• an operation amount detector configured to detect an operation amount of a brake pedal of the vehicle;
• a piston configured to be moved due to the activation of the electric actuator;
• a movement amount detector configured to detect a movement amount of the piston;
• and
• a controller configured to control the electric actuator to move the piston based on a first braking instruction value based on an operation on the brake pedal and a second braking instruction value input from an inter-apparatus communication network of the vehicle,
• wherein the controller is configured to:
• control the electric actuator based on the first braking instruction value to move the piston to thereby generate the braking hydraulic pressure when the first braking instruction value is input;
• update, based on the operation amount of the brake pedal, characteristic data indicating a relationship between a braking hydraulic value in the master cylinder input from the inter-apparatus communication network and the movement amount of the piston controlled based on the first braking instruction value, and store the updated characteristic data while the braking hydraulic pressure is generated;
• and
• control the electric actuator based on the updated characteristic data when the second braking instruction value is input.