Patent ID: 8904757

Claim:
A method for controlling regeneration within an after-treatment component of an engine, comprising: receiving an upstream temperature signal representing a temperature of an exhaust stream upstream from the after-treatment component; comparing the upstream temperature to a predetermined temperature threshold to determine whether the upstream temperature is less than or greater than the predetermined temperature threshold; if the upstream temperature is less than the predetermined temperature threshold, calculating an estimate of accumulated particulate matter in the after-treatment component using a primary soot accumulation model, and if the upstream temperature is greater than the predetermined temperature threshold, calculating an estimate of accumulated particulate matter in the after-treatment component using a secondary soot accumulation model; comparing the estimate of accumulated particulate matter in the after-treatment component to a predetermined threshold associated with the after-treatment component; and initiating a remedial action when the estimate of accumulated particulate matter in the after-treatment component exceeds the predetermined threshold; wherein the primary soot accumulation model is configured to produce an estimate of accumulated particulate matter in the after-treatment component based on a first input parameter; wherein the secondary soot accumulation model is configured to produce an estimate of accumulated particulate matter in the after-treatment component based on a second input parameter; and wherein the first input parameter differs from the second input parameter.