A method for operating a driver assistance system (DAS) to avoid a collision of a vehicle with an object At least one object in the vehicle environment is detected by vehicle-mounted environmental sensors, and is evaluated in terms of risk of collision with the vehicle, an an automatic intervention into the vehicle movement is carried out depending on this evaluation. During the automatic intervention, the following steps are performed: 1) Carrying out an automatic braking of the vehicle depending on the evaluation of collision risk, and 2) permitting a steering intervention by the driver to perform an evasive steering maneuver, in reaction to which the automatic braking is terminated. The driver-initiated steering intervention must occur before a point-in-time at which the DAS has determined the collision cannot be avoided by steering.

In the case of a method for operating a brake system of an at least double-tracked motor vehicle (10) which comprises 2 breakable wheels (12.sub.L, 12.sub.R), which are arranged at opposite ends of an axle (14.sub.V), and a rollover protection system, which can cause braking of the wheels (12.sub.L, 12.sub.R) in order to prevent a rollover situation, automatic braking of that wheel of the axle (14.sub.V), which is loaded more greatly when cornering is brought about by way of the rollover protection system. Subsequently, a counter-steering movement is detected by way of a predefined steering angle change being exceeded in a predefined time period in the direction counter to the cornering direction, and, thereupon, a brake force is caused to be built up at the opposite wheel, which is loaded less greatly by way of the rollover protection system.

A brake-by-wire braking system for a vehicle having at least two wheels which are able to be braked is described. The braking system comprises at least two brake actuator units, each of which can be associated with one of the wheels of the vehicle which are able to be braked. The braking system further comprises a brake actuation unit for actuation by the driver for braking, having at least one sensor for detecting an activation of the brake actuation unit by the driver, an acceleration actuation unit having at least one sensor for detecting the activation of the acceleration actuation unit by the driver, and at least one electronic control unit which is adapted to operate one or both of the brake actuator units in order to bring about a braking force at an associated wheel. The control unit is adapted to operate the brake actuator units on the basis of an activation of the acceleration activation unit in the event of a fault or failure of the brake actuation unit.

In a braking control device, a control unit is configured to control the yaw moment and the roll moment by independently controlling a braking force to be applied to each of the wheels of a vehicle by a braking device from the time an intervention condition is satisfied to the time an intervention end condition is satisfied while the vehicle turns. A change unit is configured to perform at least one of changing the intervention condition to be more easily satisfied and changing the intervention end condition to be less easily satisfied when the braking device is in a low-temperature state than when the braking device is in a non-low-temperature state.

A method for a brake control of a vehicle is provided. This method includes: obtaining a collision type of a current vehicle after the current vehicle is collided; obtaining driving information of the current vehicle according to the collision type; determining whether the current vehicle is in a safe state according to the driving information; obtaining driving parameter information of the current vehicle, and determining a consciousness state of a driver according to the driving parameter information when the current vehicle is determined as being in the safe state; and controlling the current vehicle to perform a brake operation when the consciousness state is determined as the non-rational driving state. According to this method, a problem of disabling of the driver's beneficial subjective risk-avoidance operations can be avoided, the secondary collision can be effectively avoided, and the damage to the vehicle due to the collision is alleviated.

A vehicle control apparatus is configured to: obtain, based on a predetermined lateral acceleration for a trajectory calculation, a steering start time threshold which is a time which it takes for a host vehicle to collide with an object at a time point at which a driver of the host vehicle has to start steering the host vehicle in order to avoid a collision between the host vehicle and the object; and start an automatic braking, when an obtained predicted time to collision becomes shorter than or equal to either one of the steering start time threshold and an automatic braking start time threshold, whichever is shorter. The automatic braking start time threshold is a time which it takes for the host vehicle to collide with the object at a time point at which the automatic braking has to be started in order to avoid the collision between the host vehicle and the object.

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.

An automatic emergency braking device, which is configured to prevent delay and malfunction of an automatic emergency brake when a vehicle enters an opposite lane, includes a collision determination unit that executes a collision determination for determining a possibility of collision between the vehicle and an oncoming vehicle. The automatic emergency braking device further includes a brake control unit that activates the automatic emergency brake according to the determination result of the collision determination, and an execution timing change unit that changes the execution timing of the collision determination. The execution timing change unit includes a determination unit that determines whether a prediction condition indicating prediction of entry of the vehicle to the opposite lane is satisfied, and a setting unit that, when the condition is satisfied, sets the execution timing of the collision determination earlier than the timing in the case where the condition is not satisfied.

A brake mode control system and a brake mode control method for a vehicle are disclosed. The brake mode control system comprises a user interface, a driving information sensor, a braking controller, and a brake mode control panel. The user interface is configured to receive a brake mode input by a driver, the driving information sensor is configured to sense driving information of the vehicle, the braking controller is configured to determine a driving state of the vehicle based on the driving information of the vehicle sensed by the driving information sensor and selectively change the brake mode received by the user interface according to the determined driving state of the vehicle to achieve a final brake mode, and the brake mode control panel is configured to generate a different braking feel according to a pedal action force required for a pedal stroke based on the final brake mode.

Disclosed are a brake force distribution device for vehicle and method thereof. The brake force distribution device for vehicle includes: a turning state detection part detecting whether the vehicle is in a turning state based on the driving state of the vehicle; a vehicle speed detection part detecting whether the vehicle speed is equal to or less than a prescribed threshold; a first yaw moment calculation part calculating the first yaw moment based on the driving state of the vehicle, the vehicle speed and the first wheelbase; a second yaw moment calculation part calculating the second yaw moment based on the driving state and the vehicle speed as well as based on the second wheelbase which is the inherent value of the vehicle; and a target moment calculation part calculating a target moment based on the difference between the first yaw moment and the second yaw moment.