Method and system for maintaining aftertreatment efficiency

A system for compensating for factors affecting particulate matter accumulation within an aftertreatment element of an exhaust system of an engine, the system comprising:

• at least one filter section within the aftertreatment element;
• and
• a controller configured to:
• determine rate of change of flow resistance through the aftertreatment element over time;
• initiate regeneration to reduce particulate matter accumulation within the aftertreatment element;
• correlate the determined rate of change of flow resistance through the aftertreatment element over time with at least a model of particulate matter accumulation within the aftertreatment element, the model being based on predetermined values for particulate matter accumulation;
• determine whether a sulfur content in fuel supplied to the engine exceeds a predetermined value;
• and
• control regeneration to compensate for an increased rate of particulate matter accumulation in the aftertreatment element determined based on the correlation and in response to determining that the sulfur content exceeds the predetermined value.

A machine, comprising:

• an engine including an exhaust system and an air intake system;
• an aftertreatment element, including at least one filter section, in the exhaust system;
• a control system including a controller, the controller configured to:
• determine rate of change of flow resistance through the aftertreatment element over time;
• initiate regeneration to reduce particulate matter accumulation within the aftertreatment element;
• correlate the determined rate of change of flow resistance through the aftertreatment element over time with at least a model of particulate matter accumulation within the aftertreatment element, the model being based on predetermined values for particulate matter accumulation;
• enable a gas induction system to deliver a portion of engine exhaust gases from a location in the exhaust system to the air intake system for the engine;
• and
• control the gas induction system to stop the delivery of the engine exhaust gases to the air intake system to compensate for an increased rate of particulate matter accumulation in the aftertreatment element determined based on the correlation.