| 摘要 |
PURPOSE: An ammonia storage correcting apparatus of a post-processing system for a diesel vehicle is provided to enable stable NOx purification by tracing the ammonia storage quantity stored in SCR catalyst, determining the generation of error, and correcting ammonia storage. CONSTITUTION: An ammonia storage correcting apparatus of a post-processing system for a diesel vehicle comprises following steps. The NOx generation rate of the SCR catalyst is predicted(S101). The NOx amount generated from the SCR catalyst(S102), and difference between the amount of NOx and the predicted amount of NOx is extracted and accumulated(S103). If the difference of the amount of the accumulated NOx exceeds set standard value(S104), ammonia storage quantity tracing error is determined(S105). If ammonia slip is detected when the tracing error of ammonia storage quantity(S106), the ammonia slip is determined as the low prediction error of ammonia storage quantity(S107) and the generation of ammonia is reduced(S108).
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