Brewing device for creating a coffee beverage and method for creating a coffee beverage by means of a brewing device

A method for producing a coffee beverage with a brewing device, wherein the brewing device comprises:

• a brewing unit with a brewing chamber for brewing coffee with brewing water, which can be introduced under pressure into the brewing chamber;
• a crema unit for producing a crema with a crema chamber connected with the brewing chamber via a coffee passage and a valve piston movable relative to the coffee passage for opening and/or closing the coffee passage;
• and
• an outlet opening for the particular coffee beverage,
• wherein the crema chamber of the crema unit is connected with the outlet opening by means of an outlet line such that for producing the particular coffee beverage coffee brewed in the brewing unit during the brewing operation can flow through the crema chamber and reach the outlet opening, wherein the valve piston is movable such that a movement position of the valve piston can be altered relative to the coffee passage and the valve piston can be brought into a plurality of different specified movement positions, so that the valve piston in one of the specified movement positions tightly closes the coffee passage and in another of the specified movement positions is at a distance from the coffee passage and does not close the coffee passage wherein the crema unit is configured such that the coffee brewed during the respective brewing operation is swirled through at different intensity in the crema chamber depending on the respective specified movement position of the valve piston,
• wherein the brewing device further comprises:
• a final control element which is configured, according to the control signal, to alter the movement position of the valve piston and/or to move valve piston into one of the specified movement positions;
• a pressure sensor for providing a pressure reading for the momentary pressure of the brewing water in the brewing chamber;
• a control unit which is configured to produce the control signal and supply it to the final control element,
• wherein the control unit is implemented as a regulator which is configured to receive the pressure reading provided by the pressure sensor and, during one of the brewing operations, to regulate the movement position of the valve piston depending on a pressure setpoint for the pressure of the brewing water in the brewing chamber such that the pressure of the brewing water in the brewing chamber assumes the pressure setpoint,
• wherein for producing a first coffee beverage during realization of a first brewing operation, coffee is brewed in the brewing chamber and during realization of the first brewing operation the pressure sensor provides a first pressure reading for the monetary pressure of the brewing water in the brewing chamber, and the control unit regulates the movement position of the valve piston depending on a first pressure reading,
• wherein for producing a second coffee beverage during realization of a second brewing operation following the first brewing operation, coffee is brewed in the brewing chamber and during realization of the second brewing operation the pressure sensor provides a second pressure reading for the momentary pressure of the brewing water in the brewing chamber and the control unit regulates the movement position of the valve piston depending on the second pressure reading.