Patent ID: 8635862
Filing Date: 2014-01-28
Classification: F01N,Y02T

Abstract:
1. An exhaust gas treatment system for an internal combustion engine, the internal combustion engine having at least one operating parameter, comprising: an exhaust gas conduit in fluid communication with, and configured to receive an exhaust gas from the internal combustion engine, the exhaust gas containing oxides of nitrogen (“NO an oxidation catalyst (“OC”) device in fluid communication with the exhaust gas conduit, the OC device activated to induce oxidation of hydrocarbons in the exhaust gas, the OC device having an oxidation catalyst compound disposed thereon that is selectively activated at a specified temperature range for converting nitrogen oxide (“NO”) to nitrogen dioxide (“NO a selective catalytic reduction (“SCR”) device in fluid communication with the exhaust gas conduit and configured to receive the exhaust gas, the SCR device located downstream of the OC device, wherein the SCR device is selectively heated to a SCR light-off temperature, and wherein the overall temperature of the SCR device is represented by a SCR temperature profile; and a control module in communication with the internal combustion engine and the exhaust gas treatment system, comprising: