A braking system that uses a combination of a friction brake force and a traction motor brake force to slow or stop the rotation of the wheel. A friction brake may provide the friction brake force. A traction motor may provide the traction motor brake force. The braking system may include sensors that provide data for determining a wheel lock threshold for each wheel. The friction brake force and the traction motor brake force may be adjusted for each wheel to provide an applied brake force to the wheel that is less than or equal to the wheel lock threshold.

In an electrified vehicle, a vibration damping control device performs vibration damping control for canceling or reducing, with the use of regenerative braking, a predetermined vibration component by monitoring the vibration component and controlling a generator control device depending on the vibration component. A system control device determines whether the vibration damping control is performable based on at least a charge status of a battery. An anti-lock braking system control device transmits a request signal to the system control device while performing anti-lock braking system control. The system control device transmits a command signal to the vibration damping control device when the vibration damping control is determined to be performable and the request signal is received from the anti-lock braking system control device. The vibration damping control device performs the vibration damping control when the command signal is received from the system control device.

A method and system for braking a vehicle using supplemental deceleration provided by an electronic parking brake. The method includes detecting a reduced function state of an integrated braking system; detecting a brake pedal input from an operator of the vehicle; and automatically generating a braking force via the electronic parking brake based on the brake pedal input and the reduced function state.

A method and system for braking a vehicle using supplemental deceleration provided by an electronic parking brake. The method includes detecting a reduced function state of an integrated braking system; detecting a brake pedal input from an operator of the vehicle; and automatically generating a braking force via the electronic parking brake based on the brake pedal input and the reduced function state.

An Anti-lock Braking System and control method are disclosed. The control method is performed after a control module intervenes a vehicle's braking system and comprises: receiving a wheel speed signal of a wheel and a vehicle acceleration signal; computing a tire-slip feedback value according to the wheel speed signal of the wheels and the vehicle acceleration signal; generating a feedback control voltage according to a tire-slip difference between a tire-slip target value and the tire-slip feedback value; generating a tire-slip compensation value by performing a differential compensation to the tire-slip feedback value; obtaining a feedforward voltage according to the tire-slip compensation value via a look-up table approach; generating a braking control voltage by adding the feedback control voltage to the feedforward voltage; and outputting the braking control voltage to a proportioning-valve brake, such that the proportioning-valve brake adjusts a braking pressure according to the braking control voltage.

An Anti-lock Braking System and control method are disclosed. The control method is performed after a control module intervenes a vehicle's braking system and comprises: receiving a wheel speed signal of a wheel and a vehicle acceleration signal; computing a tire-slip feedback value according to the wheel speed signal of the wheels and the vehicle acceleration signal; generating a feedback control voltage according to a tire-slip difference between a tire-slip target value and the tire-slip feedback value; generating a tire-slip compensation value by performing a differential compensation to the tire-slip feedback value; obtaining a feedforward voltage according to the tire-slip compensation value via a look-up table approach; generating a braking control voltage by adding the feedback control voltage to the feedforward voltage; and outputting the braking control voltage to a proportioning-valve brake, such that the proportioning-valve brake adjusts a braking pressure according to the braking control voltage.

A method for controlling an anti-lock braking system in a motor vehicle. The control is carried out based on a wheel slip of at least one of the wheels. A wheel circumferential speed and a groundspeed in the longitudinal direction of the wheel being taken into account to compute the wheel slip. The groundspeed being estimated in terms of value and direction based on signals from sensors that describe all six degrees of freedom in space.

A method for controlling an anti-lock braking system in a motor vehicle. The control is carried out based on a wheel slip of at least one of the wheels. A wheel circumferential speed and a groundspeed in the longitudinal direction of the wheel being taken into account to compute the wheel slip. The groundspeed being estimated in terms of value and direction based on signals from sensors that describe all six degrees of freedom in space.

An electric brake device for a vehicle, including: a rotation body that rotates with a wheel; a friction member; and an actuator including (a) a piston configured to come into engagement with the friction member, (b) two electric motors each as a drive source, and (c) a motion converting mechanism configured to convert a rotating motion of each of the two electric motors into an advancing and retracting movement of the piston, the actuator being configured such that the piston is advanced to push the friction member against the rotation body so as to generate a braking force and the piston is retracted to move the friction member away from the rotation body so as to cancel the braking force.

An electric brake device for a vehicle, including: a rotation body that rotates with a wheel; a friction member; and an actuator including (a) a piston configured to come into engagement with the friction member, (b) two electric motors each as a drive source, and (c) a motion converting mechanism configured to convert a rotating motion of each of the two electric motors into an advancing and retracting movement of the piston, the actuator being configured such that the piston is advanced to push the friction member against the rotation body so as to generate a braking force and the piston is retracted to move the friction member away from the rotation body so as to cancel the braking force.