Patent ID: 7587890
Filing Date: 2009-09-15
Classification: F01N,Y02T

Abstract:
1. A method of regenerating catalytic components of an internal combustion engine exhaust gas aftertreatment system comprising the steps of: providing reductant to regenerate catalytic components of said aftertreatment system; dividing said reductant into at least two portions; and introducing said portions of reductant directly into said exhaust gas aftertreatment system, wherein there is about 0.5 to about 10.0 seconds between the times at which each of said portions are introduced into said catalytic component; the method further including the step of providing; an exhaust gas aftertreatment system comprising: an exhaust gas aftertreatment system controller; an internal combustion engine exhaust gas outlet; an exhaust gas flow valve system inlet, having an exhaust gas flow valve system first outlet, and an exhaust gas flow valve system second outlet; a catalytic component having a catalytic component inlet and a catalytic component outlet; wherein said exhaust gas exhaust gas flow valve system inlet is operatively linked to said internal combustion engine exhaust, said exhaust gas flow valve system first outlet is operatively linked to said catalytic component exhaust gas inlet, said exhaust gas flow valve system second outlet is operatively linked to said exhaust gas bypass inlet, and said flow valve system is regulated by said exhaust gas aftertreatment system controller.