The vehicle control device includes a speed calculation unit, a speed estimation unit, a motion feedback calculation unit, and a slip estimator. The speed calculation unit calculates a speed in a predetermined direction of a vehicle on the basis of a feature quantity. The speed estimation unit estimates a speed in the predetermined direction on the basis of a speed or acceleration detected by a motion detector. The motion feedback calculation unit performs feedback calculation in which a value obtained, through a proportional gain, from a deviation between a calculation speed calculated by the speed calculation unit and an estimation speed estimated by the speed estimation unit, is added to the feature quantity. The slip estimator compares the calculation speed with the estimation speed, and estimates that the vehicle is in a slip state in the predetermined direction, when the estimation speed exceeds the calculation speed.

A controller comprises an electronic communication line configured to receive a system brake request control signal representing a requested system brake application and an identified urgency. A hardware processor, configured to perform a predefined set of basic operations in response to receiving the system brake request control signal, is capable of: determining a maximum braking pressure to be applied during the system braking application based on the identified urgency; generating a first system brake mode control signal, based on the determined maximum braking pressure, to set an associated first valve to a first valve state; generating a second system brake mode control signal, based on the determined maximum braking pressure, to set an associated second valve to a second valve state, the maximum braking pressure during the system braking application being set by the first valve state and the second valve state; determining an activation profile for an associated modulator based on the determined maximum braking pressure; the controller transmitting, via the electronic communication line, the first system brake mode control signal, the second system brake mode control signal and modulator control signals according to the activation profile.

The present embodiments relate to a collision prevention apparatus and method, and a driving support apparatus. The collision prevention apparatus may comprise: a collision risk determiner that determines a collision risk of a vehicle, a driving intervention determiner that determines driving intervention of a driver, and a collision prevention controller that controls a collision risk alert according to a result of determination on a collision risk of the vehicle, and adjusts a braking time point of the vehicle according to a result of determination on driving intervention of the driver.

System and method for determining vehicle speed of a wheel. The system including an electronic stability controller, an occupancy restraint controller, and an actuation controller coupled to a communication bus. The electronic stability controller including a wheel speed sensor to determine a first vehicle speed. The occupancy restraint controller including a vertical acceleration sensor to sense a vertical acceleration of the vehicle and a longitudinal acceleration sensor to sense a longitudinal acceleration of the vehicle. The actuation controller configured to determine a second vehicle speed using the vertical acceleration and the longitudinal acceleration of the vehicle. validate the second vehicle speed when the difference between the first vehicle speed and the second vehicle speed is less than a threshold, and use the first vehicle speed when the difference between the first vehicle and the second vehicle speed is greater than a threshold.

Provided is a collision avoidance assistance device with improved functionality and usability, which can suppress an excessive application or emergency application of the brakes in assisting avoidance of a collision with an object traveling in a lane orthogonal to a host vehicle (a road crossing the host vehicle). The collision avoidance assistance device calculates an amount of time to reach a predicted collision point that is an estimated amount of time until the host vehicle reaches the predicted collision point when the host vehicle is decelerated by a predetermined deceleration or braking force, and changes (increases or decreases) a brake application determination threshold based on a predicted passing time and the amount of time to reach the predicted collision point, the predicted passing time being an estimated time required for the object to pass through an intersecting region (predicted intersecting region) between a predicted path of the object (predicted target path) and a predicted path of the host vehicle (predicted host vehicle path).

The present disclosure discloses a brake control system for use in a vehicle and a control method thereof. A brake control system may be configured to include a brake pad for braking the vehicle by pressing a brake disc provided in the vehicle, a measuring apparatus for measuring the vehicle speed, the wear level of the brake pad, the traveling distance of the vehicle, the braking distance of the vehicle, and the braking pressure applied by the brake pad to the brake disc at braking, and a controller connected with the measuring apparatus and for controlling an operation of the brake pad. The controller may compare an initial braking distance, which is a design value of the braking distance before initial traveling of the vehicle, with a current braking distance, which is a braking distance after traveling of the vehicle during a certain duration, and increase the braking pressure of the brake pad in response to the amount of increase in the braking distance, when the amount of increase in the braking distance, which is a difference value between the current braking distance and the initial braking distance, is out of a setting range. The brake control system may transmit and receive a wireless signal in a mobile communication network constructed according to 5G (Generation) communication.

A method for detecting brake wear in a vehicle includes ascertaining a condition variable and generating a warning signal if multiple brake judder events are detected from the profile of the condition variable.

In one embodiment, a system determines activation parameters for an autonomous driving vehicle (ADV), where the activation parameters include historical usages of a primary brake system or a secondary brake system. In response to determining that a brake is to be applied, the system determines whether to activate a primary or a secondary brake system based on the activation parameters. The system sends an activation flag to activate the primary or the secondary brake system based on the determining whether to activate the primary or the secondary brake system. The system sends a brake command to the primary and the secondary brake system to activate either the primary or the secondary brake system according to the activation flag.

A braking system includes a hydraulic brake including a first hydraulic brake provided on one of a front wheel and a rear wheel of a vehicle and a second hydraulic brake provided on the other of the front wheel and the rear wheel of the vehicle, a main braking force adjusting device configured to control braking hydraulic pressure supplied to the first hydraulic brake and the second hydraulic brake, and an auxiliary braking force adjusting device configured to directly control braking hydraulic pressure of the first hydraulic brake when a failure occurs in the main braking force adjusting device, wherein the first hydraulic brake is connected to the main braking force adjusting device via the auxiliary braking force adjusting device.

A redundant vehicle braking system and its electronic control unit and control method thereof is disclosed. The redundant braking system is coupled to the main braking system of the vehicle. The electronic control unit comprises: a receiving module configured to receive a status signal indicating the status of the main braking system and a sensor signal indicating a driver input condition to the brake pedal and a vehicle speed condition; an activation module configured to activate the braking assist function of the redundant braking system when it is judged that the main braking system has entered a mechanical backup state based on the status signal; and a braking assist module configured to, upon activation of the braking assist function, execute a corresponding one of a plurality of braking assist modes based on the sensor signal, wherein the plurality of braking assist modes comprise: a standby mode, a first-assist adjustable mode, a second-assist adjustable mode, and a braking pressure holding mode.