Patent ID: 8906134

Claim:
An exhaust gas treatment system of an engine, comprising: a particulate filter; at least one sensor configured to measure a level of oxides of nitrogen; and a control module configured to control regeneration of the particulate filter based on an engine-out soot flow rate prediction, the engine-out soot flow rate prediction generated by the control module based on the measured level of oxides of nitrogen, an engine air-fuel ratio factor of the engine, and an engine timing factor of the engine, the engine timing factor based on an engine fuel injection timing of the engine, and the control module is further configured to apply a power factor to a product of the measured level of oxides of nitrogen and the engine timing factor to produce an unscaled engine-out soot flow rate prediction and apply the engine air-fuel ratio factor to the unscaled engine-out soot flow rate prediction to generate the engine-out soot flow rate prediction.