Method for operating an internal combustion engine, computer program product, computer program and control and / or regulating device for operating an internal combustion engine

摘要

A method, a control and / or regulating device (15), a computer program product with program code and a computer program with program code are proposed which provide an improved approximation of the course of the mass flow over the pressure ratio of a compressor (5) of the internal combustion engine (1) at measuring points. The compressor (5) is arranged in an air supply (10) of the internal combustion engine (1). The mass flow through the compressor (5) is measured for various pressure ratios across the compressor (5). A curve of the mass flow over the pressure ratio is extrapolated from the measurement points determined in this way. The course of the mass flow over the pressure ratio is approximated using a tangent function.