Patent ID: 8312708
Filing Date: 2012-11-20
Classification: F01N,Y02A,Y02T

Abstract:
1. A closely-coupled exhaust aftertreatment system and turbocharger, comprising: a first exhaust conduit comprising a first valve operable between a first position and a second position, the first position promoting an exhaust flow within the first exhaust conduit to an inlet of an oxidation catalyst (OC), and the second position promoting the exhaust gas flow within a second exhaust conduit; a third exhaust conduit fluidly coupled to an outlet of the OC, the third exhaust conduit comprising a second valve operable between a first position and a second position; the first position promoting an exhaust flow within the third exhaust conduit to an inlet of a particulate filter (PF), and the second position promoting the exhaust gas flow through a fourth exhaust conduit to an inlet in the second exhaust conduit; a turbocharger that is fluidly coupled to the second exhaust conduit downstream of the inlet; and a selective catalyst reduction (SCR) catalyst that is located downstream of and fluidly coupled to the turbocharger to receive the exhaust gas flow therefrom and located upstream of and fluidly coupled to the PF to provide the exhaust gas flow thereto.