Abstract: A method for controlling an electric parking brake for a motor vehicle including a brake actuator having an electric motor disposed directly on the brake caliper. When the parking brake is utilized as an additional service brake, depending on a brake pedal brake command, the electric motor is initially energized on detection of an imminent or commencing brake-pedal actuation however the electric motor generates no braking force until a predetermined or specific brake command is received. As a result, an overload of the vehicle voltage source is avoided if simultaneous utilization of multiple parking-brake actuators occurs.

Abstract: A method is provided for operating an electromechanical vehicle brake system having an ESP module and at least two brake circuits, each brake circuit comprising high and low pressure switching valves, a low pressure storage device, and two wheel brakes. The method comprises, in advance of a possible breaking procedure and based on a trigger factor, filling the low pressure storage device with an amount of brake fluid at a first pre-pressure. Subsequently, an ESP pump is used to fill the vehicle brake system, including the low pressure storage device, with an adjustable amount of final pre-pressure. All valves are closed when the final pre-pressure is achieved. The method further comprises, during a braking procedure, opening respective inlet valves of the wheel brakes and supplying at least a part of the final pre-pressure to at least one wheel brake of the vehicle brake system.

Abstract: A method for operating an electromechanical vehicle brake system is provided. The method comprises determining that an activation condition has been met, building an initial portion of the pre-charge pressure in the brake system, applying the initial portion of the pre-charge pressure to at least one wheel brake, building a secondary portion of the pre-charge pressure in the brake system, and adjusting the secondary portion of the pre-charge pressure to an expected braking pressure. Adjusting the secondary portion of the pre-charge pressure may include reducing the secondary portion of the pre-charge pressure.

Abstract: A method for controlling a brake system of a motor vehicle wherein a central generation of brake-fluid pressure takes place electrically and essentially mechanically decoupled from the movement of a brake-actuating element. The brake pressure of individual wheels can be selectively modified depending on driving-dynamics parameters by activating hydraulic check-valve and drain-valve elements. In the case of braking events occurring before stability and/or slip limits are reached, which limits would make it necessary to use the antilock braking system and/or a stability program, the brake pressure is reduced such that the use of the hydraulic valve elements for the antilock brake system and/or the stability program is time-delayed. Further, blocking the supply of brake fluid to individual wheels or creating pressure-decrease states for individual wheels is minimized with respect to time.

Abstract: A brake system for a motor vehicle having front and rear axles, the brake system having front and rear axle braking mechanisms operated under pressure control devices for producing a respective brake pressure on the front and rear axles of the motor vehicle. A controller receives signal information from sensors and systems on the motor vehicle to detect initiation of a braking process and detect a current speed of travel of the motor vehicle. An initial brake pressure for the rear axle braking mechanism is determined by the controller. A target brake pressure for the rear axle braking mechanism is determined by the controller and is representative of an increase in pressure relative to the initial brake pressure and the current speed of travel. Instructions from the controller operate the pressure control devices to produce the target brake pressure at the rear axle braking mechanism.

Abstract: The disclosure relates to a method for operating a motor vehicle which is capable of driving either under the control of a human driver who is located on board the motor vehicle or autonomously, at least over certain sections of a route, and which is able to avoid collisions, detect adverse effects on the driver and bring about emergency stops. Accordingly, the motor vehicle has an emergency braking assistant, and if an adverse effect on the driver is detected in the autonomous driving mode, a characteristic curve which is preset for emergency braking operations is changed in such a way that an emergency braking operation is initiated at an earlier point and the braking force is built up more slowly than in the non-autonomous driving mode.

Abstract: Methods for controlling wheel slip of a motor vehicle include braking the wheel by supplying a first measured quantity of brake fluid from a modulation cylinder to a brake device of the wheel, determining the wheel slip of the wheel, and moving a second measured quantity of brake fluid between the modulation cylinder and the brake device. When the wheel slip is too small or too large, a change in a volume of the brake fluid in the modulation cylinder is measured and a change in a measure of a braking effect is determined. The second measured quantity of brake fluid is determined on the basis of the measured change in the volume of the brake fluid in the modulation cylinder and the change in the measure of the braking effect. Braking systems configured to carry out the methods, as well as vehicles including the braking systems, are further contemplated.

Abstract: A method for operating a hydraulic motor vehicle brake system with an anti-lock brake system having a plurality of brake cylinders associated with the wheels to be braked. A central pressure generating device generates a hydraulic brake pressure, wherein the hydraulic brake pressure is distributed to the brake cylinders and may be selectively modified for individual brake cylinders or a group of brake cylinders. The hydraulic brake pressure maintained at a level exceeding an estimated brake pressure limit of each wheel.

Abstract: A method of controlling a brake system of a motor vehicle having a braking assistance function. The brake system including a master brake cylinder, activated with a brake pedal. A distance s between a valve piston connected to the brake pedal, and a transmission element, connected to a pressure piston of the master brake cylinder is sensed and the brake system is controlled as a function of the sensed distance s. Within the scope of this monitoring process, brake pedal release is detected even when the pressure-generating unit is activated. In addition, despite an active braking assistance function, consistent interplay occurs between activation by the driver and assistance-side activation of the brakes given satisfactory pedal feedback.

Abstract: A method for controlling a brake pressure booster with hydraulic brake boosting wherein the activation of an additional pressure source takes place upon exceeding a specified brake cylinder pressure threshold value. The threshold value lying, between 50% and 100%, preferably between 70% and 80%, of a pressure limit value, from which the operating travel/brake pressure curve without additional brake pressure assistance has a knee point. Further upon exceeding a specified piston rod activation travel limit value, which lies at 20% to 100% of the available travel, preferably at 40% to 60% of the available travel. Furthermore, the speed of the vehicle, its lateral deceleration and its longitudinal deceleration can be used as criteria. Deactivation takes place on falling below a specified piston rod deactivation travel limit value. Based on selection of activation/deactivation criteria additional brake pressure boosting can be operationally during braking maneuvers.

Abstract: A method of operating a hydraulic brake system is described. A method of operating a hydraulic brake system of a motor vehicle having a mechatronic brake booster to boost a hydraulic pressure generated in a brake master cylinder of the brake system by a brake pedal of the motor vehicle determines whether a propulsion request is present during operation of the motor vehicle and actuates the mechatronic brake booster when a propulsion request has ended or been substantially reduced. During a predetermined time interval after the propulsion request has ended or been reduced, the mechatronic brake booster is operated at a minimum intensity such that no braking effect occurs during the predetermined time interval, unless a braking request occurs.

Abstract: A method for operating a motor vehicle hydraulic braking system having at least one electric motor-operated braking pressure generator. The output power of the electric motor-operated braking pressure generator is restricted during normal driving/braking situations and the restriction is temporarily deactivated upon identification of a critical driving situation, such as an overstressing of the brake system to include brake fade.

Abstract: Systems and methods are described for reducing brake drag in a brake system of a vehicle. It may be determined that the vehicle is stationary. A brake pressure of the brake system may be monitored. The monitored brake pressure may then be compared to a brake pressure criteria. A brake pressure to be applied may be regulated when the monitored brake pressure does not meet the brake pressure criteria, wherein the applied brake pressure meets the pressure criteria.

Abstract: A motor vehicle braking method wherein the vehicle includes a brake operating unit generating a braking signal based on brake pedal travel. The method includes the step of measuring the vehicle deceleration and pedal position during vehicle braking and determining an actual ratio between the measured deceleration and pedal position. In addition, a target ratio is provided based on vehicle deceleration for a defined pedal position. Wherein the actual ratios compared with the target ratio and a braking adjustment is provided when the actual ratio deviates from the target ratio.

Abstract: A method for operating an electromechanical vehicle brake system is provided. The method comprises determining that an activation condition has been met, building an initial portion of the pre-charge pressure in the brake system, applying the initial portion of the pre-charge pressure to at least one wheel brake, building a secondary portion of the pre-charge pressure in the brake system, and adjusting the secondary portion of the pre-charge pressure to an expected braking pressure. Adjusting the secondary portion of the pre-charge pressure may include reducing the secondary portion of the pre-charge pressure.

Abstract: A method for operating an electromechanical vehicle brake system is provided. The method includes determining that an activation condition has been met, selecting a pre-charge pressure based at least in part on the activation condition, building up at least an initial portion of the pre-charge pressure in the brake system, and applying at least the initial portion of the pre-charge pressure to at least one wheel brake.

Abstract: A method is provided for operating an electromechanical vehicle brake system having an ESP module and at least two brake circuits, each brake circuit comprising high and low pressure switching valves, a low pressure storage device, and two wheel brakes. The method comprises, in advance of a possible breaking procedure and based on a trigger factor, filling the low pressure storage device with an amount of brake fluid at a first pre-pressure. Subsequently, an ESP pump is used to fill the vehicle brake system, including the low pressure storage device, with an adjustable amount of final pre-pressure. All valves are closed when the final pre-pressure is achieved. The method further comprises, during a braking procedure, opening respective inlet valves of the wheel brakes and supplying at least a part of the final pre-pressure to at least one wheel brake of the vehicle brake system.

Abstract: Methods for controlling wheel slip of a motor vehicle include braking the wheel by supplying a first measured quantity of brake fluid from a modulation cylinder to a brake device of the wheel, determining the wheel slip of the wheel, and moving a second measured quantity of brake fluid between the modulation cylinder and the brake device. When the wheel slip is too small or too large, a change in a volume of the brake fluid in the modulation cylinder is measured and a change in a measure of a braking effect is determined. The second measured quantity of brake fluid is determined on the basis of the measured change in the volume of the brake fluid in the modulation cylinder and the change in the measure of the braking effect. Braking systems configured to carry out the methods, as well as vehicles including the braking systems, are further contemplated.

Abstract: A method for operating a hydraulic brake system of a motor vehicle, comprising a pressure generating device used to build up additional brake pressure in a master brake cylinder or in addition to a master brake cylinder and in opposition to further pedal actuation wherein the additional pressure is a function of the pedal actuation travel distance. A method that reduces the limitations of a braking system's physical parameters on the build-up of additional braking pressure.

Abstract: The present disclosure provides a hydraulic brake system for a motor vehicle and a method for the detection of a fault condition of the hydraulic brake system. An electronic control device determines at least one pressure value of the brake fluid of the brake system and at least one volume value of the brake master cylinder associated with the pressure value during an operation of a brake master cylinder. The electronic control device compares the determined pressure value and volume value with at least one pair of pressure-volume reference values for the detection of a fault condition of the brake system, wherein at least two different fault conditions of the brake system can be differentiated based on the comparison. The electronic control device is configured to automatically correct the detected fault condition.