Systems and methods for detecting a brake event of a vehicle. One system includes an electronic control unit configured to receive a plurality of vehicle signal inputs, wherein the plurality of vehicle signal inputs includes an engine torque, and estimate a wheel torque of a rear wheel of the vehicle based on one or more of the plurality of vehicle signal inputs. The electronic control unit is also configured to determine a difference between the estimated wheel torque and the engine torque, and, in response to the difference being negative and a fault being detected in a brake switch associated with a brake of the rear wheel, activating a brake light of the vehicle.

An apparatus determines a road friction of a commercial vehicle. The commercial vehicle has a first axle and a second axle, a load distribution mechanism for changing a load on the first axle or on the second axle, and a slip sensor for determining a slip value for at least one wheel on the first axle or on the second axle. The apparatus includes an evaluation unit configured to control the load distribution mechanism to change the load of the first axle or on second axle, determine a change in the slip value in response to the change of the load, and evaluate the road friction based on the change in the slip value.

A brake traction control system (BTCS) using a redundancy braking system includes a main braking force adjusting device configured to control a hydraulic brake of a vehicle, a sensor unit configured to detect a driving state of the vehicle, an electronic brake electrically operating and configured to generate braking force for at least one driving wheel, and an auxiliary braking force adjusting device configured to control the hydraulic brake and the electronic brake when a failure occurs in the main braking force adjusting device, wherein the auxiliary braking force adjusting device is configured to adjust the braking force of the electronic brake provided on at least one wheel on left and right sides of the vehicle based on a detected value of the sensor unit, wherein the auxiliary braking force adjusting device apply the longer pre-operation time of the electronic brake as a risk level increases, and wherein the risk level is determined based on a gradient ratio of a road on which the vehicle is travelling.

A method is for controlling a brake system having at least two modulators. A pressure can be modulated via the respective modulator and provided at a connection. The method includes: determining if there is a leak; localizing a detected leak by controlling a modulator with a test signal to change the pressure, and determining a deviation between a target value specified as a function of the signal and an actual value assigned to the connection; if a threshold is exceeded, the line has a leak; controlling a modulator so a flow connection is interrupted between the leaky line and the pressure supply from which the pressure for the connection is modulated; and at a connection to which no line with a located leak is connected, an adjusted pressure is provided, dependent on the braking demand and a deceleration loss from the interruption of the flow connection to the leaky line.

The disclosure relates to an electro-mechanical brake system including: an electro-mechanical brake configured to generate a braking force in each wheel according to a pedal effect applied to a brake pedal; a brake control unit configured to determine whether a wheel slip has occurred based on a wheel speed sensor values received from wheel speed sensors installed in wheels of a vehicle to set activation or deactivation of Anti-lock Braking System (ABS) control, and activate the ABS control on the electro-mechanical brake according to occurrence of a wheel slip, wherein the brake control unit is configured to obtain a first target wheel torque based on a wheel slip value and a road surface condition upon activation of the ABS control, and obtain a second target wheel torque by recalculating the first target wheel torque based on a communication delay and a mechanical response of the electro-mechanical brake.

A method for controlling motion by a heavy-duty vehicle, where the vehicle is arranged to be controlled based on a target longitudinal wheel slip of at least one driven wheel on the vehicle. The method includes: monitoring an acceleration of the vehicle; monitoring a current longitudinal wheel slip of the at least one driven wheel; reducing the target longitudinal wheel slip of the at least one driven wheel in case the monitored acceleration of the vehicle decreases while the monitored current longitudinal wheel slip is non-decreasing; and controlling wheel slip of the at least one driven wheel based on the target longitudinal wheel slip.

A method for generating a target value of a position of an actuator of a brake of a wheel of a motor vehicle is disclosed. Values of another wheel are used and as a result a correction value which corrects a starting value is determined. As a result, a force sensor system on the wheel can be omitted. Further an associated method for controlling an actuator of a brake of a wheel of a motor vehicle and an associated control device are disclosed.

It is an object of the present invention to provide an electric brake device capable of accurate control at low cost. The present invention includes a motor control device 11 that controls rotation of an electric motor 8 for pressing brake pads 5a, 5b. The motor control device 11 is provided with: a motor position-current relationship generation portion 43 that acquires a relationship between the rotational position and the current of the electric motor 8; a braking torque estimation portion 41 that estimates braking torque pressing the brake pads 5a, 5b, on the rotational position of the electric motor 8; and a braking torque-position relationship portion generation portion 42 that acquires a relationship between the rotational position and the braking torque of the electric motor 8 on the basis of information from the motor position-current relationship generation portion 43 and the braking torque estimation portion 41. The rotation of the electric motor 8 is controlled on the basis of information from the braking torque-position relationship portion generation portion 42.

A method for estimating a peak coefficient of friction (Peak) at a location on a runway or taxiway is provided. Responsive to detecting braking of an aircraft a first coefficient of friction () and a first wheel slip () are determined at a first time t.sub.1 associated with a first location. A second coefficient of friction () and a second wheel slip () are determined at a second time t.sub.2 associated with a second location. A peak coefficient of friction (.sub.Peak) is then estimated using the first coefficient of friction (), the first wheel slip (), the second coefficient of friction (), and a second wheel slip () for at least one of a first location or a second location.

Disclosed herein is an emergency braking system using an electronic parking brake according to the present disclosure, in which the emergency braking system is configured to provide an emergency braking using an electronic parking brake (EPB) in case of total or partial failure of a main braking system, and includes: an EPB actuator configured to apply an emergency braking force to a wheel; a slip detection unit configured to detect a wheel slip on the wheel equipped with the EPB actuator; an EPB control unit configured to determine a road surface condition by calculating a slip ratio through slip information transmitted from the slip detection unit, and to control an operation of the EPB actuator based on the road surface condition.