Internal combustion engine having a regulating device

An internal combustion engine having a regulating device, wherein an air-fuel mixture having a combustion air ratio adjustable by the regulating device, is burnt in the internal combustion engine, the regulating device comprising:

• a power output regulating circuit configured to change an actual power output of the internal combustion engine to a reference power output of the internal combustion engine by an adjustment of the combustion air ratio;
• and
• a NOx emission regulating circuit configured to use a functional relationship to actuate actuators influencing a charge pressure for NOx emission regulation, based on a charge pressure reference value set for each reference power output of the internal combustion engine;
• wherein the charge pressure reference value is set using reference power output, instead of actual power output of the internal combustion engine, and there is no coupling of NOx emission regulation and power output regulation.