Patent ID: 8875501

Claim:
A method of controlling a power system including an engine and an exhaust treatment system having an exhaust treatment device, comprising: determining current constituent levels; determining a plurality of sets of potential constituent levels, wherein each set of potential constituent levels is predicted as a function of a corresponding respective aftertreatment control strategy; determining a catalyst parameter indicative of a conversion efficiency of the exhaust treatment device; determining a weighted index based on the catalyst parameter; determining a plurality of first index values, wherein each first index value of the plurality of first index values is predicted as a function of the corresponding respective aftertreatment control strategy; selecting a selected aftertreatment control strategy based on a comparison between the weighted index and each first index value of the plurality of first index values, wherein the selected aftertreatment control strategy changes the catalyst parameter; and using an injector to operate the exhaust treatment system according to settings corresponding to the selected aftertreatment control strategy.