Exhaust gas treatment system
AssigneeGM Global Technology Operations LLC
InventorsShouxian Ren, Michael Christopher Luckham, David B. Brown
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Abstract
An emission treatment system for a vehicle having an internal combustion engine is described. The emission treatment system has an HC-SCR catalyst including a non-Pt group metal dispersed in a ceramic matrix configured to receive an exhaust gas flow from an engine. The system also has an oxidation catalyst comprising a Pt group metal configured to receive the exhaust gas flow from the HC-SCR catalyst. The system also has a U-SCR catalyst and a diesel particulate filter, one of the U-SCR catalyst or the DPF configured to receive the exhaust gas flow from the oxidation catalyst and the other one of the U-SCR catalyst or the diesel particulate filter configured to receive the exhaust gas flow from the respective one.
Claims20
An exhaust emission treatment system for a vehicle, comprising:
- an HC-SCR catalyst comprising a non-Pt group metal catalyst material disposed on a ceramic matrix and configured to receive an exhaust gas flow from an engine;
- an oxidation catalyst comprising a Pt group metal catalyst material and configured to receive the exhaust gas flow from the HC-SCR catalyst;
- an U-SCR catalyst and a particulate filter, one of the U-SCR catalyst or the particulate filter configured to receive the exhaust gas flow from the oxidation catalyst;
- and
- the other one of a U-SCR catalyst or the particulate filter configured to receive the exhaust gas flow from the respective one.
Dependencies are inferred from the claim text.