Patent ID: 7415345

Claim:
A computer program, characterized in that it is programmed for use in a method for operating an internal combustion engine ( 10 ), in which an air filling (rl) in a combustion chamber ( 14 ) is ascertained, taking a pressure (ps) in an intake conduit ( 22 ) into account, characterized in that the air filling (rl) is ascertained on the basis of a model (A), which as its input variables receives an rpm (nmot) of a crankshaft ( 44 ) and a ratio of the pressure (ps) in the intake conduit ( 22 ) to an ambient pressure (pu), wherein the model (A), as its input variable, additionally receives a temperature (Tbr) of the air present in the combustion chamber ( 14 ), and wherein the temperature of the air present in the combustion chamber is ascertained on the basis of a model, which as its input variables receives a detected temperature of the air in the intake conduit and at least one further detected temperature of the engine, wherein said at least one further detected temperature is selected from the group consisting of a coolant temperature, an exhaust-gas temperature, a cylinder head temperature, or any combination of the coolant temperature, exhaust-gas temperature and cylinder head temperature.