Vehicle brake apparatus

A vehicle brake apparatus comprising:

• a disc rotor mounted to be rotatable in unison with a wheel provided in a vehicle;
• a caliper fixed to a fixing member of the vehicle and including a brake pad movable along a rotor axis direction of the disc rotor;
• a drive mechanism for moving the brake pad by a drive force of a motor along the rotor axis direction to press the brake pad against the disc rotor;
• a motor controlling means for controlling the motor for pressing the brake pad against the disc rotor;
• a brake pressure detecting means for detecting at least one of a pressing force for pressing the bake pad against the disc rotor or a load applied to the a brake pad when the brake pad is pressed against the disc rotor;
• and
• a rotation speed detecting means for detecting speed of the disc rotor;
• wherein if a variation amount in detection values detected by said brake pressure detecting means during one rotation of the disc rotor exceeds a variation amount determination threshold value and a detection value variation frequency relating to the variation in the detection values has a correlation with the rotation speed detected by said rotation speed detecting means and the detection value variation frequency exceeds a preset variation frequency determination threshold value, said motor controlling means effects a vibration restricting control for controlling the motor in inverted phase to the variation in the detection values, and
• wherein said vibration restricting control executed by said motor controlling means includes control for controlling the motor in in-phase to a detection value variation in an entirety or a part of a range where said detection value variation frequency is smaller than said variation frequency determination threshold value, provided said variation amount in detected values is greater than said variation amount determination threshold value and said detection value variation frequency has a correlation with said rotational speed.

A vehicle brake apparatus comprising:

• a disc rotor mounted to be rotatable in unison with a wheel provided in a vehicle;
• a caliper fixed to a fixing member of the vehicle and including a brake pad movable along a rotor axis direction of the disc rotor;
• a drive mechanism for moving the brake pad by a drive force of a motor along the rotor axis direction to press the brake pad against the disc rotor;
• a motor controlling means for controlling the motor for pressing the brake pad against the disc rotor;
• a brake pressure detecting means for detecting at least one of a pressing force for pressing the brake pad against the disc rotor or a load applied to the brake pad when the brake pad is pressed against the disc rotor;
• and
• a rotation speed detecting means for detecting a rotation speed of the disc rotor;
• wherein if a variation amount in detection values detected by said brake pressure detecting means during one rotation of the disc rotor exceeds a variation amount determination threshold value and a detection value variation frequency relating to the variation in the detection values has a correlation with the rotation speed detected by said rotation speed detecting means and the detection value variation frequency exceeds a preset variation frequency determination threshold value, said motor controlling means effects a vibration restricting control for controlling the motor in inverted phase to the variation in the detection values, and
• wherein said variation frequency determination threshold value is provided as a first variation frequency determination threshold value;
• and said vibration restricting control executed by said motor controlling means includes control for controlling the motor in in-phase to a detection value variation in an entirety or a part of a range where said detection value variation frequency exceeds a second variation frequency determination threshold value which is preset to be greater than said first variation frequency determination threshold value, provided said variation amount in detected values is greater than said variation amount determination threshold value and said detection value variation frequency has a correlation with said rotational speed.