An electronic parking brake system includes an electronic parking brake (EPB) including a pair of brake pads disposed on both sides of a brake disc rotating with a rear wheel of a vehicle, a piston provided to press the pair of brake pads, a nut member provided to press the piston, a spindle member provided to move the nut member, and an electric motor configured to rotate the spindle member; a wheel speed sensor configured to detect a wheel speed of the rear wheel; a G sensor configured to detect a longitudinal acceleration of the vehicle; an accelerator pedal sensor configured to detect an operation of an accelerator pedal of the vehicle; an EPB switch configured to receive a parking apply command or a parking release command from a driver; and a controller configured to control the electric motor, wherein the controller is configured to determine whether a residual clamping force is present in the EPB based on a rear wheel speed or the longitudinal acceleration at a time of departure of the vehicle after parking is released, and when the residual clamping force is present, release the residual clamping force through an additional parking release control.

A brake device, configured to be installed directly on a driving axle or through a hub, wherein said device includes a first brake disc joined to the axle sharing rotary motion, a first container disc and a second container disc configured to be moved in the axial direction of said axle. The container discs are positioned on each side of the brake disc, such that both are configured to be moved in the axial direction towards the linings of the first brake disc and to exert a pushing pressure thereon, producing the braking of the brake disc and, therefore, of the driving axle whereon it is assembled. Furthermore, the container discs comprise an inner circuit configured to accommodate the passage of a coolant configured to cool them.

Provided is an electro-mechanical brake system and a method of operating the same including: a pair of pad plates disposed on both sides of a disk rotating together with a wheel; a piston configured to allow the pad plates to come in close contact with or to be separated from the disk; a first motor and a second motor configured to operate independently from each other and provide the piston with power; a first gear configured to decelerate power of the first motor and transmit the decelerated power; a second gear configured to convert power of the second motor into a translational motion and apply pressure to or release pressure on the piston while in contact with the piston, the second gear including a guide part slantly formed on a portion that comes in contact with the piston; and a connecting part connecting the first gear and the second gear to each other to allow the first gear and the second gear to rotate together with each other, the connecting part configured to couple the first gear and the second gear such that the second gear is slidable with respect to the first gear.

An electromechanical brake pressure generator for a hydraulic brake system of a vehicle. The electromechanical brake pressure generator includes a screw drive system for converting a drive-side rotary movement into a translation movement to generate brake pressure. The screw drive system includes a spindle which is rotatable via an electric motor, a spindle nut, which interacts with a thread of the spindle so that the spindle nut is axially displaceable by a rotation of the spindle, and a drive wheel, which is situated coaxially on the spindle in a torsionally fixed manner and via which the spindle is connected to the electric motor. The drive wheel is developed from at least two different materials. A first material forms at least a wheel hub of the drive wheel. A second material forms at least a drive ring enclosing the wheel hub. The first material has greater strength than the second material.

A brake actuator comprising a DC motor, a computer configured for: measuring, over time, a current drawn by the motor and a voltage between the terminals of the motor; implementing a Kalman filter in order to compute, from the measured current and voltage, a filtered current drawn by the motor and a filtered rotational speed of a shaft of the motor; computing, from the value of the filtered current and the value of the filtered rotational speed, a clamping force that is produced by the actuator; controlling the motor such that it stops when the computed value of the clamping force reaches a predetermined setpoint value.

A parking mechanism that includes a wheel disc, a wedge disc, and a drive assembly. An axis of the wheel disc and an axis of the wedge disc both are aligned with an axis of a motor shaft. A wedge groove with an opening facing the wheel disc is formed on a surface of the wedge disc facing the wheel disc, and a movable part in contact with the wheel disc is disposed in the wedge groove. In a direction from a bottom of the wedge groove to the wheel disc, a groove depth at a first end of the wedge groove is greater than a size of the movable part, and a groove depth at a second end of the wedge groove is less than the size of the movable part. The parking mechanism can provide stepless variable parking force.

An electric motor with a rotor and a stator, where the rotor and/or the stator can comprise two or more sections, and a torque ripple caused by the magnetic field(s) associated with a section of the rotor (or stator) can at least partially counters torque ripple caused by the magnetic field(s) associated with other section(s) of the rotor (or stator).

A brake control device controls a hydraulic brake that generates hydraulic braking force and an electric parking brake that generates parking braking force different from the hydraulic braking force. The brake control device comprises: a detection unit that detects a parking brake operation for causing the electric parking brake to generate the parking braking force; and a control unit that causes the electric parking brake to generate the parking braking force when the hydraulic braking force per wheel generated by the hydraulic brake, after decreasing below the minimum first braking force per wheel required for maintaining the vehicle stop state only by the electric parking brake, is less than the first braking force, in association with the parking brake operation having been performed in a state where the stop state is maintained only by a hydraulic brake operation for causing the hydraulic brake to generate the hydraulic braking force.

A parking brake apparatus for a vehicle includes a motor section receiving electric power from an outside, and generating power; a power transmission section rotated by driving the motor section; a pair of pressing units having rotation axes that are disposed parallel to a rotation axis of the power transmission section, and pressing a brake pad by receiving power from the power transmission section; and a load transmission unit installed between the pair of pressing units, connected to each of the pair of pressing units, and transmitting a pressing load of any one of the pair of pressing units to the other pressing unit.

This electric braking device is provided with: an electric motor MTR that, in accordance with an operation amount Bpa of a braking operation member BP, generates a pressing force Fba, being a force pressing a friction member MSB against a rotary member KTB that rotates integrally with a wheel WHL of the vehicle; and a circuit board KBN to which a processor MPR and a bridge circuit BRG are mounted. The device is further provided with a rotation angle sensor MKA for detecting the rotation angle Mka of the electric motor, and drives the electric motor MTR on the basis of the rotation angle Mka. An end face Mmk of the rotation angle sensor MKA is fixed so as to be in contact with the circuit board KBN. The device is further provided with a pressing force sensor FBA for detecting the pressing force Fba, and drives the electric motor MTR on the basis of the pressing force Fba. An end face Mfb of the pressing force sensor FBA is fixed so as to be in contact with the circuit board KBN.