Disk brake apparatus
AssigneeHitachi, Ltd.
InventorHideaki Ishii
Life of this patent
Estimating the term…
Abstract
A disk brake apparatus in which a determination is made as to whether a centering operation should be performed, and operation conditions for the centering operation (the length of the interval and the number of the operations) are set, according to a change of deformation of a disk rotor by heat release over time. When the centering operation is performed, a solenoid is actuated to perform the centering operation according to the set operation conditions. The centering operation is an operation of moving a pair of brake pads (2) and (3) into contact with the disk rotor (1) and then separating the pads from the disk rotor during a cooling process while a vehicle is running.
Claims20
A disk brake apparatus comprising:
- an actuator;
- a brake pad that can be moved by actuating the actuator so that the brake pad is pressed against a disk rotor to generate a braking force;
- and
- a controller adapted to perform repeatedly a contact and separation control, which is a control for driving the actuator to cause the brake pad to be moved into contact with the disk rotor and then be separated from the disk rotor, when a change of deformation of the disk rotor by heat release over time occurs, so that a pad clearance is adjusted according to the change of deformation of the disk rotor by heat release over time after the braking force is generated, wherein:
- before or until deformation of the disk rotor by heat release is finished after one braking operation is performed, the controller controls the actuator at a predetermined time interval to cause the brake pad to be moved into contact with the disk rotor, and
- the predetermined time interval is set to a larger value with each performance of the operation of moving the brake pad into contact with the disk rotor and separating the brake pad from the disk rotor.
A disk brake apparatus comprising:
- an actuator;
- a brake pad that can be moved for braking by actuating the actuator so that the brake pad is pressed against a disk rotor to generate a braking force;
- and
- a controller adapted to perform repeatedly a centering operation at a predetermined time interval, which is an operation for driving the actuator to cause the brake pad to be moved into contact with the disk rotor and then be separated from the disk rotor, so that a pad clearance is adjusted according to a change of thermal deformation of the disk rotor by heat release over time after the braking force is generated, in a period from a release of a brake operation after the thermal deformation of the disk rotor occurs due to the brake operation until an end of the thermal deformation as a result of heat release in the disk rotor.
Dependencies are inferred from the claim text.