ZF ACTIVE SAFETY GMBH

The disclosure relates to an electromechanical brake for a motor vehicle. The electromechanical brake comprises an actuating piston which is set up to be moved translationally in a direction of a piston axis in order to actuate at least one brake shoe. The electromechanical brake also comprises a brake carrier having a gas-containing piston chamber in which the actuating piston is received such that it can be moved translationally in a direction of the piston axis. Furthermore, the electromechanical brake comprises an electric motor for driving the actuating piston. In the case of the electromechanical brake, a venting device is provided, which is set up to vent the piston chamber with respect to an exterior. The disclosure also relates to a disc brake, to a brake system, and to a motor vehicle.

An actuator assembly for a vehicle brake, in particular an electromechanical vehicle brake, is specified, having a brake caliper in which there is an intermediate space—for accommodating a brake rotor, a drive housing, in which a drive assembly of the actuator assembly is accommodated, wherein the drive housing is fixedly connected to the brake caliper, a linearly guided actuating slide for a brake pad, which can be moved optionally between a retracted position and an extended position via the drive assembly, and a frame part having an accommodation space, in which a transmission unit of the drive assembly is at least partially accommodated, wherein an electric motor is secured on the frame part, which electric motor is coupled in terms of drive to the actuating slide via the transmission unit and a spindle drive, and the frame part is secured on the drive housing.

The brake pressure generator 1 according to the invention comprises a hydraulic block 5 having a brake cylinder bore 6 . A piston 30 with a pressure side 33 , which projects into the brake cylinder bore 6 , and with a coupling side 35 , for coupling the piston 30 to an actuating rod 25 , extends along a piston longitudinal axis 31 between the pressure side 33 and the coupling side 35 . A receiving element 50 comprises a connecting section 55 and a sliding guide 70 . A guide rod 10 fastened to the hydraulic block 5 and offset and oriented parallel to the piston 30 is at least partially engaged around by the sliding guide 70 , with the result that the piston 30 can slide along the guide rod 10 during an axial movement. Between the coupling side 35 and the connecting section 55 , an axial form fit 80 acts, which at least primarily prevents the receiving element 50 from being released from the piston 30 in the axial direction 8 . In addition, a circular form fit 81 acts between the coupling side 35 and the connecting section 55 , which at least primarily prevents a rotation of the receiving element 50 relative to the piston 30 . The invention also relates to a corresponding piston arrangement 20 .

The disclosure relates to a method for operating a braking system of a vehicle during autonomous parking processes, including a first electronic control unit, a service brake system, and a partial braking system. The first control unit is designed for activating the service brake system and the partial braking system, in which an autonomous parking process is initiated, followed by an activation of the service brake system by the first control unit to generate a braking force. In the event of a failure of the service brake system, the partial braking system is activated by the first control unit to generate a braking force while the autonomous parking process is continued by utilising the partial braking system. The disclosure also relates to a vehicle control system for controlling autonomous parking processes.

A hydraulic control unit for a vehicle, including a hydraulic fluid reservoir with a hydraulic fluid reservoir space, out of which a hydraulic pressure generator is able to suction hydraulic fluid, an air space and a piston movingly accommodated in the hydraulic fluid reservoir, which separates the hydraulic fluid reservoir space and the air space from each other, wherein the air space is connectable and/or connected to an interior space of the hydraulic control unit, and a hydraulic motor vehicle braking system.

An actuator assembly for a vehicle brake is described, with a brake calliper in which a space is formed for a brake disc, and an actuating slide for a brake pad. The actuating slide can be moved optionally between a retracted position and an extended position. In the brake calliper, adjoining the space, a sleeve-like portion is formed with a running face for the actuating slide. The actuating slide is received in the sleeve-like portion and is guided linearly on the running face.

The present disclosure relates to an electromechanical actuation unit for a motor vehicle brake comprising: at least one electromechanical actuation device for actuating at least one brake shoe of the motor vehicle brake. The electromechanical actuation device has at least drive element and at least one drive spindle, wherein the at least one drive element drives the at least one drive spindle. The electromechanical actuation device has at least one elastic element, the at least one elastic element being elastically deformable for a parking brake function.

The disclosure relates to a method for determining the wear of a brake of a motor vehicle having a brake piston, an actuator, a first brake lining, a second brake lining, a friction partner and a mounting, where the brake piston is held on a spindle of the brake and can be moved axially along the spindle between the actuator and the friction partner.

The disclosure relates to a vehicle brake system having a vehicle axle and a first and second brake assembly for a respective electromechanical vehicle brake. The brake assemblies can be arranged on opposite sides of the vehicle axle at the same position relative to the brake rotor provided there, wherein the first brake assembly has an actuator assembly fastened to the brake calliper in the first position and the second brake assembly has an actuator assembly fastened to the brake calliper in the second position, and the brake callipers and the actuator assemblies can be positioned with mirror symmetry relative to a vertical mirror plane extending along the central longitudinal axis of the vehicle. The disclosure also relates to a brake assembly.

A brake system of a vehicle, with electromechanical service brakes on at least one axle designed without force sensors, having a control unit designed to control a braking operation for meeting a braking demand by activating the electromechanical service brakes of all the axles. An acquisition element on each of the electromechanical service brakes acquires a parameter from which a current brake touch point of the electromechanical service brake in question can be determined. For operating the brake system, the brakes on one of the axles of the vehicle are actuated during a braking operation. A current value of a brake touch point of the electromechanical service brakes on another axle that is currently not being used to provide the brake force of the ongoing braking operation is determined. An air gap of those electromechanical service brakes is set according to the current value of the brake touch point.