| 摘要 |
A method for forming a signal in a device having an internal combustion engine and an associated catalytic converter, the signal representing the instantaneous temperature of the catalytic converter. The internal combustion engine is controllable by an electronic engine control unit as a function of the load, the engine speed and other operating parameters. Air may be supplied to the internal combustion engine via an intake port, whereas the exhaust gases from the internal combustion engine may be carried away via an exhaust duct in which a catalytic converter is arranged. The internal combustion engine may be cooled by a radiator having a coolant circulation. The coolant temperature, the outside air temperature, the load and the engine speed are detected by sensors and corresponding signals are supplied to an electronic control unit. The electronic control unit ascertains the exhaust-gas flow and the exhaust-gas temperature over time by calculation from the load and the engine speed. The electronic control unit ascertains the instantaneous temperature of the catalytic converter by calculation from the detected and ascertained parameters, as well as from a starting value of the catalytic-converter temperature stored in the electronic control unit.
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