Method for regulating a boost pressure of an engine

A pressure boost system for an engine, comprising:

• a compressor;
• and
• a regulation device for regulating a boost pressure of the engine, the regulation device including:
• means for ascertaining a reference boost pressure based on a speed of the engine and a load of the engine;
• means for detecting at least one of a flow and a pressure of air supplied to the engine, and generating at least one of an associated flow signal and a pressure signal;
• means for selecting the smaller of the reference boost pressure and a limit boost pressure as a setpoint boost pressure;
• and
• means for regulating the setpoint boost pressure in such a way that a pressure ratio in the compressor does not exceed a limit boost pressure ratio;
• wherein the limit boost pressure ratio is ascertained based on a magnitude of a change over time of the at least one of the flow signal and the pressure signal, and wherein the limit boost pressure is ascertained based on the limit boost pressure ratio and a speed of the compressor.