An apparatus, system, and method are disclosed for enhancing the efficiency of an exhaust aftertreatment application. The method may include determining the current operating conditions of the application, the optimal operating conditions of a target component 120, and the performance criteria of a conditioning component 110 relative to the optimal operating conditions. The method may include determining an optimal fraction of an exhaust flow 104 to pass through the conditioning component 110 to achieve the optimal operating conditions of the target component 120. The method may further include manipulating a bypass valve 106 position based on the optimal fraction of exhaust flow 104 to pass through the conditioning component 110. The target component 120 may be a selective catalyst reduction (SCR) component 120 that operates optimally at a designed NO<SUB>2</SUB>/NO<SUB>x</SUB> mole ratio. The conditioning component 110 may be a diesel oxidation catalyst (DOC) 110 that affects the NO<SUB>2</SUB>/NO<SUB>x</SUB> mole ratio. A method is thereby provided to operate an exhaust aftertreatment application more efficiently relative to an application without the invention.
