Electric Brake
First Claim
1. An electric brake apparatus comprising:
- a disc rotor rotating together with a wheel;
an actuator for rectilinearly actuating a piston in an axial direction of the disc rotor by using an electric motor;
a drive controller for performing drive control of the actuator;
a brake pad to be pressed by the piston to give frictional resistance to the disc rotor in a rotational direction; and
a braking start position detecting means for detecting a braking start position of the piston at which position the brake pad is brought into contact with the disc rotor, characterized in thatthe drive controller stores the braking start position detected by the braking start position detecting means as a maximum braking start position, and updates a stored value of the maximum braking start position when the braking start position shifts in a pressing force increasing direction.
1 Assignment
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Accused Products
Abstract
Provided is an electric brake capable of accurately estimating the brake pad temperature and securing a sufficient braking force and response. An electric brake has a disc rotor rotating with a wheel, an actuator for rectilinearly actuating a piston in the axial direction of the disc rotor by using an electric motor, a drive controller for controlling the drive of the actuator, a brake pad pressed by the piston to give a frictional resistance to the disc rotor in the direction of rotation, and a braking start position detector for detecting a braking start position of the piston where the disc rotor is brought into contact with the brake pad. The drive controller stores the braking start position detected by the braking start position detector as the maximum braking start position. When the braking start position shifts in the pressing force-increasing direction, the drive controller updates the value stored as the maximum braking-start position.
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Citations
6 Claims
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1. An electric brake apparatus comprising:
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a disc rotor rotating together with a wheel; an actuator for rectilinearly actuating a piston in an axial direction of the disc rotor by using an electric motor; a drive controller for performing drive control of the actuator; a brake pad to be pressed by the piston to give frictional resistance to the disc rotor in a rotational direction; and a braking start position detecting means for detecting a braking start position of the piston at which position the brake pad is brought into contact with the disc rotor, characterized in that the drive controller stores the braking start position detected by the braking start position detecting means as a maximum braking start position, and updates a stored value of the maximum braking start position when the braking start position shifts in a pressing force increasing direction. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification