Electrohydraulic braking-force generation device for an electrohydraulic motor vehicle braking system

An electrohydraulic brake power generating apparatus for an electrohydraulic motor vehicle brake system, comprising:

• a power transmission device which is coupled with a brake pedal,
• a brake cylinder device to be operated by the power transmission device, wherein the brake cylinder device comprises a first cylinder-piston device, with the first cylinder-piston device to be fluidly coupled with at least one brake circuit, and
• a brake booster device which comprises a second cylinder-piston device and at least one electromechanical actuator, wherein the brake booster device is adapted to apply a hydraulic pressure on the brake cylinder device for brake boosting,
• wherein the power transmission device is adapted to operate the brake cylinder device by means of a relative movement in each operating condition of the brake power generating apparatus regardless of whether the brake power generating apparatus is operating in normal operation or in an emergency operation in which the brake booster is inoperable,
• wherein the brake cylinder device has a brake booster piston which is to be fluidly coupled with the brake booster device,
• wherein the brake booster piston receives at least a portion of the power transmission device, in such a manner that a relative movement between the power transmission device and the brake booster piston is possible.

A method for operating an electrohydraulic brake power generating apparatus, wherein the electrohydraulic brake power generating apparatus comprises:

• a power transmission device which is coupled with a brake pedal,
• a brake cylinder device to be operated by the power transmission device, wherein the brake cylinder device comprises a first cylinder-piston device, with the first cylinder-piston device to be fluidly coupled with at least one brake circuit,
• a brake booster device which comprises a second cylinder-piston device and at least one electromechanical actuator, wherein the brake booster device is adapted to apply a hydraulic pressure on the brake cylinder device for brake boosting,
• wherein the brake cylinder device has a brake booster piston which is to be fluidly coupled with the brake booster device,
• wherein the brake booster piston receives at least a portion of the power transmission device, in such a manner that a relative movement between the power transmission device and the brake booster piston is possible,
• wherein the power transmission device is adapted to operate the first cylinder-piston device by means of a relative movement relative to the brake cylinder device in each operating condition of the brake power generating apparatus, wherein the method comprises the following step:
• operating the brake cylinder device by means of a relative movement between the power transmission device and the brake cylinder device, wherein the operation of the brake cylinder device takes place by means of the relative movement between the power transmission device and the brake cylinder device in each operating condition of the brake power generating apparatus regardless of whether the brake power generating apparatus is operating in normal operation or in an emergency operation in which the brake booster is inoperable.