Patent ID: 7797932

Claim:
An apparatus to enhance aftertreatment regeneration in an internal combustion engine system comprising an internal combustion engine in exhaust gas supplying communication with an exhaust manifold coupled to an exhaust recirculation line inlet and a turbocharger inlet, the apparatus comprising: an extender comprising a length of hollow tube positioned within an interior of the exhaust manifold; a flow dampener coupled to the extender, the flow dampener comprising an orifice and a sidewall that converges from the extender to the orifice, wherein the flow dampener and the orifice are disposed within the interior of the exhaust manifold, wherein the length of the hollow tube of the extender is predetermined to position the orifice within a normal exhaust flow region within the interior of the exhaust manifold adjacent the turbocharger inlet; a residence chamber defined within the extender and the flow dampener; and a fuel injector configured to inject fuel into the residence chamber, through the orifice, and into exhaust gas within the normal exhaust flow region, wherein the residence chamber facilitates at least partial vaporization of fuel injected therein.