| 摘要 |
The invention relates to a method for operating a nitrogen oxide (NOx) storage catalyst (12') in an internal combustion engine (1), in particular, on a motor vehicle. During a first operating phase of the storage catalyst (12'), nitrogen oxides are stored in the storage catalyst (12'), during a second operating phase, stored nitrogen oxides from the storage catalyst (12') are released and, during the first operating phase, the amount of nitrogen oxides stored is determined. According to the invention, in order to determine the beginning and end of the second operating phase as exactly as possible, during the second operating phase a parameter is determined, which is characteristic of the amount of nitrogen oxides released and compared with the amount of nitrogen oxides stored during the first operating phase. By means of the above comparison a plausibility check and a calibration of the output signal of a nitrogen oxide (NOx) sensor (14') arranged after the storage catalyst (12') can be achieved.
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