| 摘要 |
The invention relates to a method for diagnosing (200) a nitrogen oxide trap suitable for breaking down, during a regeneration step (110, 130), the nitrogen oxides stored in the trap by reaction with reducing agents, which includes: a step of determining (230) the weight of reducing agents ((Mred) consumed during a regeneration step; a step (240) of comparing said weight (Mred) with a fault threshold (S) below which the trap (13) is determined to be faulty; and a step (250) of emitting a signal indicating the fault state of the trap (13), characterised in that the weight of reducing agents (Mred) is determined during a second step (130) of regenerating the trap which starts after a short delay (Δttempo) following a first step (110) of completely regenerating the trap (13). |
