| 摘要 |
The present invention pertains to a process for checking the processing of the exhaust gases of a heat engine, the nitrogen oxides (NOx) contained in these gases being stored and then reduced in a trap modeled in such a way that the reduction of these nitrogen oxides (NOx) is actuated when the storage capacity of the trap, determined according to the model, reaches a threshold (M<SUB>thresh</SUB>). According to the present invention, such a process is characterized in that the modeling of the trap is checked by measuring the quantity of nitrogen oxides (NOx) stored in this trap by means of a sensor located downstream of the trap, and by comparing this measurement to the quantity of nitrogen oxides (NOx) stored, determined according to the model, in order to correct the latter if the measured quantity is markedly different from the modeled quantity.
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