Patent ID: 9046025
Filing Date: 2015-06-02
Classification: F01N,Y02T

Abstract:
1. A selective catalytic reduction (SCR) device monitoring system comprising: an SCR device; an engine out NOx monitoring module; an SCR out NOx monitoring module configured and disposed to monitor NOx released from the SCR device; a NOx storage model module operatively connected to the engine out NOx module and the SCR out NOx monitoring module, the NOx storage model module being configured and disposed to determine an amount of NOx stored in the SCR device; a consumed ammonia correction model module operatively connected to the NOx storage model module, the consumed ammonia correction model module being configured and disposed to calculate a corrected consumed ammonia prediction factor; and an ammonia dosing system configured and disposed to introduce an amount of ammonia into the SCR device based on the corrected consumed ammonia prediction factor.