Abstract: A double cup-shaped piston for a disc brake including an electromechanical parking brake device. An aspect of the invention permits an improved compromise between easier operability, rationalized component logistics in piston production, reduced hydraulic volume uptake in cooperation with the wheel brake periphery, and enhanced fatigue strength under maximum collective stress, in particular for heavy-duty applications of a disc brake with an electromechanical parking brake device. The problem is solved by the presence of a piston wall, which is provided, on the one hand, to sit with a free edge on a rear plate of a friction lining, and wherein the piston, on the other hand, includes an integral dome which forms an open receptacle for an actuator arranged diametrically to the edge of the piston.

Abstract: A multi-circuit electrohydraulic motor vehicle brake system includes a plurality of calipers having hydraulically actuated actuators which are hydraulically connected to an electronically controlled unit. The unit includes an electronic unit ECU and a hydraulic unit HCU. At least some of the calipers, additionally or separately include electromechanical actuators for actuating or releasing a parking brake effect. In order to cut down on electrical interfaces and electronic units in a motor vehicle, the electronic unit is connected to the electromechanical actuators via respective two separate electrical supply lines, and the electronic unit has at least one electrical switch for supplying the electromechanically actuated actuators with power.

Abstract: A parking brake device for motor vehicles is described, having an operator control element and at least two electromechanical actuators for generating a parking braking force at in each case one wheel of the motor vehicle, and having in each case one wheel actuation unit per electromechanical actuator, and a further control unit. The further control unit is connected here, on the one hand, to the operator control element and, on the other hand, in parallel to each wheel actuation unit via at least one parking brake data bus. The further control unit applies control signals to the wheel actuation units, and a safety element is provided which ensures reliable operation of the parking brake device with wheel control units with, in each case, one microcontroller.

Abstract: An actuating unit for an electromechanically actuatable disk brake for motor vehicles consists essentially of a drive unit (1), i.e., an electric motor (11); an actuating element (7), by means of which one (4) of two friction linings (4, 5) mounted with limited freedom of movement in a brake caliper can be brought into engagement with a brake disk (6); and a first and a second reducing gear (2, 3). An electronic controller (8), which serves to drive the electric motor (11), is assigned to the actuating unit. To realize an actuating unit of compact axial dimensions which is also optimally designed with respect to packaging, at least part of the electronic controller (8) is mounted between the electric motor (11) and the housing (25) which holds the second reducing gear (3).

Abstract: An actuating unit for an electromechanically actuatable disk brake for motor vehicles consists essentially of a drive unit (1), i.e., an electric motor (11); an actuating element (7), by means of which one (4) of two friction linings (4, 5) mounted with limited freedom of movement in a brake caliper can be brought into engagement with a brake disk (6); and a first and a second reducing gear (2, 3). An electronic controller (8), which serves to drive the electric motor (11), is assigned to the actuating unit. To realize an actuating unit of compact axial dimensions which is also optimally designed with respect to packaging, at least part of the electronic controller (8) is mounted between the electric motor (11) and the housing (25) which holds the second reducing gear (3).

Abstract: An actuating unit is provided for an electromechanically actuated disc brake for automotive vehicles, which is disposed on a brake caliper wherein two friction linings respectively cooperating with a side face of a brake disc are arranged in a manner displaceable to a limited extent, with one of said friction linings being arranged so as to be directly movable into engagement with the brake disc by means of an actuating element, through the actuating unit, while the other friction lining is movable into engagement with the brake disc through the action of a reaction force applied by the brake caliper. The actuating unit comprises an electric motor and at least one reduction gear operatively arranged between the electric motor and the first friction lining. The reduction gear is formed as a threaded drive which, for guiding the threaded nut, includes a cylindrical guide piece that is provided with a sensor device for sensing the reaction force.

Abstract: The present invention discloses an electronically controllable brake actuating system for automotive vehicles, including an unpressurized pressure fluid supply reservoir, a pressure source actuatable by an electronic control unit, the pressure of which can be applied to wheel brakes of the vehicle, further including a device for detecting the driver's wish for deceleration as well as valve assemblies inserted upstream of the wheel brakes and connecting the wheel brakes alternatively to the pressure source or the pressure fluid supply reservoir. In order to increase the operational or functional reliability of a system of this type, the present invention discloses the provision of means for detecting gases or air disposed in the system.

Abstract: The present invention discloses an electronically controllable brake actuating system for automotive vehicles, including an unpressurized pressure fluid supply reservoir, a pressure source actuatable by an electronic control unit, the pressure of which can be applied to wheel brakes of the vehicle, further including a device for detecting the driver's wish for deceleration as well as valve assemblies inserted upstream of the wheel brakes and connecting the wheel brakes alternatively to the pressure source or the pressure fluid supply reservoir. In order to increase the operational or functional reliability of a system of this type, the present invention discloses the provision of means for detecting gases or air disposed in the system.

Abstract: A method and device is disclosed for determining and detecting the rollover hazard of a vehicle through a dynamic detection of variations in the center of gravity of the vehicle. During cornering of the vehicle, first condition variables, which correspond to the respective wheel load, are detected on at least two wheels. The detected first condition variables are compared to reference values representative of the respective cornering maneuver. A corresponding change in the center of gravity is calculated from the differences between the detected first condition variables and the reference values.

Abstract: An electronically controllable brake actuation system for motor vehicles is proposed, with a master brake cylinder (2), with a pressureless pressure medium reservoir (3), with a pressure source (20) which can be controlled by means of an electronic control unit (32), by means of which pressure can be applied to the wheel brakes (7, 8, 9, 10) of the vehicle, which can be connected by means of at least one hydraulic connection (11, 14), which can be shut off by means of a separating valve (12, 15), to the master brake cylinder (2), with a device (13, 33) for the recognition of the driver's wish to slow down, and with at least one separating piston arrangement (16) which is connected before the wheel brakes (7-10), where the first chamber (17) of this separating piston arrangement can be connected to the master brake cylinder (2), and its second chamber (19) can be connected through a valve device (27) to the pressure source (20) or to the pressure medium reservoir (3).