Control apparatus for electric brake, electric brake apparatus, and method for controlling electric brake

An electric brake apparatus comprising:

• a parking brake mechanism configured to provide a braking force to a vehicle and hold the braking force;
• an electric motor configured to drive the parking brake mechanism;
• and
• a control apparatus configured to control the electric motor,
• wherein the control apparatus is configured to:
• determine, in an application which includes holding actuation of the parking brake mechanism, a physical amount regarding a loaded stroke at a time of the application from a load detection point including as far as an overshoot amount, the load detection point being a generation point of a thrust force that is detected due to a current flowing in the electric motor, the overshoot amount being based on a rotation of the electric motor due to inertia after driving of the electric motor is stopped;
• determine a physical amount regarding a target release stroke in a release, which includes release actuation of the parking brake mechanism, according to the physical amount regarding the loaded stroke at the time of the application, the target release stroke being set to an amount acquired by adding a stroke including the overshoot amount from the load detection point to an application operation completion point;
• and
• output a control instruction to conduct the release based on the physical amount regarding the target release stroke.

A method for controlling an electric brake, the electric brake being configured to control an electric motor, the electric motor being configured to drive a parking brake mechanism, the parking brake mechanism being configured to provide a braking force to a vehicle and hold the braking force, the method comprising:

• determining, in an application which includes holding actuation of the parking brake mechanism, a physical amount regarding a loaded stroke at a time of the application from a load detection point including as far as an overshoot amount, the load detection point being a generation point of a thrust force that is detected due to a current flowing in the electric motor, the overshoot amount being based on a rotation of the electric motor due to inertia after driving of the electric motor is stopped;
• determining a physical amount regarding a target release stroke in a release, which includes release actuation of the parking brake mechanism, according to the physical amount regarding the loaded stroke at the time of the application, the target release stroke being set to an amount acquired by adding a stroke including the overshoot amount from the load detection point to an application operation completion point;
• and
• outputting a control instruction to conduct the release based on the physical amount regarding the target release stroke.