Patent ID: 8793976

Claim:
A system for a vehicle, comprising: a first electronic circuit configured to estimate a change in an amount of sulfur within a catalyst of an exhaust system of the vehicle; a second electronic circuit configured to estimate the amount of sulfur within the catalyst based on the change; a third electronic circuit configured to determine an offset value based on a comparison of an output of an exhaust gas oxygen sensor located downstream of the catalyst and a predetermined range, wherein the predetermined range is defined by a first predetermined value that corresponds to a lean condition and a second predetermined value that corresponds to a rich condition; a fourth electronic circuit configured to determine a fueling correction based on the offset value; a fifth electronic circuit configured to control fueling of an engine based on the fueling correction and to selectively adjust the fueling of the engine based on the amount of sulfur; and a sixth electronic circuit configured to selectively generate a signal based on the amount of sulfur within the catalyst, wherein the third electronic circuit is configured to maintain the offset value in response to the generation of the signal, and wherein the fourth electronic circuit is configured to maintain the fueling correction in response to the generation of the signal.