Apparatus and method for indirectly determining a temperature at a predetermined location in an internal combustion engine

An apparatus and a process are provided for determining a temperature at a predetermined location in an internal combustion engine. The temperature at a bridge between two exhaust valves of an internal combustion engine can be measured only with great effort during operation. It is proposed to measure a temperature at a location in the internal combustion engine that is easier to access and to determine the bridge temperature with the aid of a computation model on the basis of the engine rpm, the quantity of injected fuel, the temperature of the charge air, and the coolant temperature.