Exhaust gas aftertreatment desulfurization control

A method for controlling desulfurization of at least one aftertreatment device in an exhaust gas treatment system of an internal combustion engine, the method comprising:

• initiating a desulfurization request based on one or more trigger conditions, wherein the one or more trigger conditions comprise one or more of:
• an engine operating time exceeding an engine operating time threshold;
• an amount of fuel consumed exceeding a fuel consumption threshold;
• a distance traveled exceeding a distance traveled threshold;
• and a number of particulate filter device regenerations exceeding a regeneration threshold;
• controlling desulfurization of the at least one aftertreatment device based on the desulfurization request;
• and
• interrupting the desulfurization of the at least one aftertreatment device based on an interrupt condition.

An exhaust gas treatment system for an internal combustion engine to control desulfurization of at least one aftertreatment device, comprising:

• a desulfurization mode trigger module configured to set a desulfurization request based on one or more trigger conditions;
• a desulfurization control module configured to control desulfurization of the at least one aftertreatment device based on the desulfurization request, wherein the desulfurization control module initiates the desulfurization concurrently with or immediately succeeding regeneration of a particulate filter device in the exhaust gas treatment system;
• and
• an interrupt module configured to interrupt the desulfurization of the at least one aftertreatment device based on an interrupt condition.