Patent ID: 7533523

Claim:
A system, comprising: a sulfur loading estimate module for generating an estimated sulfur loading value associated with an adsorber calculated as a function of a fueling rate; a desulfation trigger module for triggering a desulfation event for said adsorber upon detection of a trigger event, wherein said trigger event comprises a cost-effective trigger for triggering said desulfation event at a fuel efficient engine operating mode once said estimated sulfur loading value exceeds a predetermined threshold, wherein said cost-effective trigger is triggered as a function of said estimated sulfur loading value, a sensed conversion efficiency value of said adsorber, and one or more engine operating parameters indicative of a minimum post injection fueling requirement needed to deliver a rich air to fuel ratio at an inlet of said adsorber; a interrupt module for interrupting said desulfation event upon detection of an interrupt event; and an end desulfation module for stopping said desulfation event upon detection of an end desulfation event.