Abstract: In a method for determining a failure in a service or parking brake having an electromotive and a hydraulic brake device for generating a clamping force, an error is detected in the hydraulic brake device if an electromotive characteristic of the electric brake motor is outside an admissible value range.

Abstract: In a method for adjusting the clamping force exerted by a parking brake, which force is applied by an electric-motor braking apparatus and by a hydraulic braking apparatus, the hydraulic inlet pressure generated by the driver and existing in the hydraulic braking apparatus is utilized to generate a hydraulic clamping force; and for the case in which the hydraulic clamping force is not sufficient to reach a target clamping force, an electric clamping force is generated in supplementary fashion.

Abstract: In a method for adjusting the clamping force exerted by a parking brake, which force is applied by an electric-motor braking apparatus and a hydraulic braking apparatus, the electric braking motor impinging upon a brake piston of a hydraulic wheel brake unit of the hydraulic braking apparatus, for the case in which the pre-pressure existing in the hydraulic braking apparatus exceeds a threshold pressure value, an inlet valve in the braking circuit of the hydraulic braking apparatus is closed, and the target braking force is established by actuation of the electric-motor braking apparatus.

Abstract: In a method for providing the clamping force generated by a parking brake, the roadway incline is measured and in the case that the roadway incline exceeds a threshold value, a reengagement process is carried out after a defined time period has elapsed.

Abstract: In a method for setting the clamping force exerted by a parking brake, which force is applied by an electric motor-based braking apparatus and, if necessary, by an additional braking apparatus, during an actuation phase of the electric motor-based braking apparatus, the motor resistance and the motor constant are determined from the present motor voltage, the present motor current, and the present motor rotation speed, and the clamping force achievable by the electric motor-based braking apparatus is ascertained therefrom. If the electric motor-based braking force does not reach a required target clamping force, an additional braking force is generated by the additional braking apparatus.

Abstract: A method for securing an electrically operated parking brake, characterized by the following steps: monitoring an operating variable which is relevant for the proper functioning of the parking brake; ascertaining/determining whether the operating variable exceeds a predefined threshold value; and prompting the driver to carry out a certain action as a function of the value of the operating variable, the action including the engagement of the gear or the operation of the foot service brake. Also described is a control unit for carrying out the described method.

Abstract: In a method for reducing the clamping force applied by a parking brake, which may be generated at least partially by an electromechanical brake device having an electric brake motor and supplemented if necessary by a hydraulic brake device, a signal is generated for actuating the hydraulic brake device for the case that it is not possible for the brake motor to be released for reducing the clamping force.

Abstract: A method for operating a parking brake of a vehicle, in particular of a motor vehicle, which parking brake operates in the superposition mode, the brake force of the parking brake being applicable by two different force-generating actuators mutually supporting one another in the superposition mode. It is provided that the force-generating, in particular pressure-generating, actuator is activated for support even before the superposition.

Abstract: In a method for reducing the clamping force applied by a parking brake, which may be generated at least partially by an electromechanical brake device having an electric brake motor and supplemented if necessary by a hydraulic brake device, a signal is generated for actuating the hydraulic brake device for the case that it is not possible for the brake motor to be released for reducing the clamping force.

Abstract: A method for setting the clamping force acting on a wheel brake, a part of the clamping force being provided using an electromechanical brake device and simultaneously another part of the clamping force being provided using a hydraulic brake device. During an application procedure, the power consumption of the electric motor-driven brake device is regulated to an essentially constant value in an operating phase (phase 4), in which both brake devices simultaneously exert force, so as to set the clamping force of the parking brake very precisely.

Abstract: In a method for setting the clamping force exerted by a parking brake, which force is applied by an electric motor-based braking apparatus and, if necessary, by an additional braking apparatus, during an actuation phase of the electric motor-based braking apparatus, the motor resistance and the motor constant are determined from the present motor voltage, the present motor current, and the present motor rotation speed, and the clamping force achievable by the electric motor-based braking apparatus is ascertained therefrom. If the electric motor-based braking force does not reach a required target clamping force, an additional braking force is generated by the additional braking apparatus.

Abstract: A method for measuring at least one operating variable at multiple electric motors of an automatic parking brake with the aid of a sensor system, the signals generated by the sensor system being processed by a processing device. To minimize the influence of signal interferences, the at least one operating variable is not measured or is not further processed as long as none of the electric motors is activated.

Abstract: The invention relates to an automatic parking brake for motor vehicles having a plurality of brake actuators (4a, 4b) and an operating element (6) for actuating the parking brake, the braking actuators (4a, 4b) being connected to a controller (1, 11) performing individual wheel slip control upon occurrence of a critical driving situation. Simultaneous locking and thus the loss of lateral force can be prevented if the controller (1, 11) is designed such that the wheel slippage (A2) of a second wheel (13b) is considered when controlling the slippage of a first wheel (13a).

Abstract: The present invention relates to an automatic parking brake, including a brake piston, an auxiliary piston, a hydraulic chamber disposed between the brake piston and the auxiliary piston, a spring element, for prestressing the auxiliary piston, a spindle device connected to the auxiliary piston via a threaded connection, and a drive for the spindle device, wherein in a locked state of the parking brake, the brake piston is mechanically locked via the spindle device and the spring-loaded auxiliary piston, and in a released state of the parking brake, the auxiliary piston is blocked by means of the spring element and/or by means of the spindle device.

Abstract: The present invention relates to an automatic parking brake, including a brake piston, an auxiliary piston, a hydraulic chamber disposed between the brake piston and the auxiliary piston, a spring element, for prestressing the auxiliary piston, a spindle device connected to the auxiliary piston via a threaded connection, and a drive for the spindle device, wherein in a locked state of the parking brake, the brake piston is mechanically locked via the spindle device and the spring-loaded auxiliary piston, and in a released state of the parking brake, the auxiliary piston is blocked by means of the spring element and/or by means of the spindle device.

Abstract: A method of and a device for operating a decentralized control system, at least two control units are provided to control at least one actuating element each. In this control, different operating modes are to be differentiated, the selection of the respective operating mode of the individual control unit is made by the at least two control units on the basis of at least one status signal.

Abstract: An electrically controlled parking brake for motor vehicles, including an operating element for operating the parking brake and a control unit, which controls an actuator of the parking brake when the operating element is operated. The parking brake function is ensured, upon failure of the electrical supply, if the parking brake includes a connecting device for connecting an auxiliary voltage source, with the aid of which the parking brake may be operated in an auxiliary manner.

Abstract: A method and a device for evaluating a sensor signal. A value for the residual braking torque of the brake and/or a detection of a blockage of the wheel brake is derived as a function of this signal in the unbraked state.

Abstract: A method of and a device for operating a decentralized control system, at least two control units are provided to control at least one actuating element each. In this control, different operating modes are to be differentiated, the selection of the respective operating mode of the individual control unit is made by the at least two control units on the basis of at least one status signal.

Abstract: The invention relates to a wheel brake apparatus having an electric motor, a rotation/translation conversion mechanism that can be driven to rotate by the electric motor, a hydraulic working piston that can be moved by the rotation/translation conversion mechanism, and a brake lining piston that can be hydraulically moved by the working piston. In order to permit an emergency actuation of the wheel brake apparatus in the event of a leak in the hydraulics, the invention proposes embodying the wheel brake apparatus so that the brake lining piston can also be mechanically moved by the working piston. This can be achieved by virtue of the fact that the two pistons are disposed coaxially.