Abstract: A method for operating a generator set includes: providing the generator set includes an internal combustion engine and a generator connected to an engine of the internal combustion engine in a torque-transmitting manner; specifying a generator set frequency and a generator set phase of a voltage of a power produced by the generator; adapting a torque-forming combustion control variable for the engine; operating the engine in a phase controlled mode by regulating an engine phase via a phase regulator to change a generator set phase, the engine phase being in a predetermined phase relationship with the generator set phase; setting the variable for adapting the engine phase to a target engine phase; determining an engine target phase by a target phase generator upstream of the phase regulator, subject to a calculated rotational reference system that describes a rotary motion of a fictitious inertia-increasing mass with a virtual stabilization speed.

Abstract: A method for operating a generator set includes: operating the generator set in synchronized manner to a power grid, which includes: synchronizing a generator voltage with a grid voltage; matching a generator voltage frequency and/or a generator voltage phase with a grid frequency and/or a grid voltage phase; operating generator set in synchronization mode to synchronize the generator voltage phase with the grid voltage phase; operating an engine in a phase control mode with adjustment of an engine phase to change the generator voltage phase; transmitting the grid voltage phase to a phase regulator; regulating, by the phase regulator, the engine phase to a phase difference, which is created by a difference between the generator voltage phase and the grid voltage phase; and setting a phase parameter formed as the combustion control variable for torque-forming combustion setting of the engine, to adjust the engine phase subject to the phase difference.

Abstract: In a method for controlling the NOx concentration in the exhaust gas of an internal combustion engine in which an NOx control deviation is calculated from an actual NOx value and a desired NOx value, a control value is calculated based on the NOx control deviation via an NOx controller and by means of the control value at least one condition of the cylinder inlet flow volume of the internal combustion engine is adjusted in that, additionally, an adaption injection begin is determined in dependence on the control value of the NOx controller, and the injection begin is changed by the adaption injection begin.

Abstract: In a method for controlling the NOx concentration in the exhaust gas of an internal combustion engine in which an NOx control deviation is calculated from an actual NOx value and a desired NOx value, a control value is calculated based on the NOx control deviation via an NOx controller and by means of the control value at least one condition of the cylinder inlet flow volume of the internal combustion engine is adjusted in that, additionally, an adaption injection begin is determined in dependence on the control value of the NOx controller, and the injection begin is changed by the adaption injection begin.