Brake Force Generating Device for a Hydraulic Vehicle Brake System, Vehicle Brake System and Method for Operating a Brake Force Generating Device

The invention relates to a brake force generating device for a hydraulic vehicle brake system with a force input member, which can be or is coupled to a brake pedal, a master cylinder arrangement for generating a hydraulic brake pressure, a chamber arrangement, in which a working chamber is separated from a vacuum chamber via a movable wall, a control valve device with a control valve housing for optional connection of the vacuum chamber to the working chamber or of the working chamber to the atmosphere and an electrically triggerable actuating device for actuating the control valve device, which is positioned as floating in the control valve housing. According to the invention it is provided that the control valve device has a first seal seat and a second seal seat, the seal seats being arranged on opposite sides of the actuating device in respect of the longitudinal axis. The invention provides that in a normal operating situation the force input member is mechanically uncoupled from the control valve device actuated by the actuating device. In an emergency operating situation, however, the force input member can according to the invention be coupled mechanically to the control valve device and can actuate the control valve device as a result of its displacement in the direction of the longitudinal axis.