Patent ID: 8453436

Claim:
An anti-fouling device for an exhaust aftertreatment injector of an exhaust aftertreatment system for an internal combustion engine, comprising: a member positionable between an opening on an exhaust conduit and an exhaust aftertreatment injector, the member being plate shaped and having a bore for alignment with a nozzle of the injector and the opening on the exhaust conduit to allow a flow from the nozzle through the bore into the opening on the exhaust conduit, wherein the member is formed as a base part and an insert part, the base part having a seat for the insert part, wherein the bore is formed by aligned holes in the base part and the insert part, and wherein the bore is defined by a throat section opening to a frusto-conical shaped section widening toward an exhaust conduit side of the member, the member having an inlet for receiving air from an air source, and having a passageway formed by aligned passages in the base part and the insert part to guide air from the inlet to at least one outlet opening on a surface bounding the throat section, the at least one outlet being oriented to direct air across a space bounded by the bore to the nozzle.