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Apparatus and method to inject a reductant into an exhaust gas feedstream

Patent ·
OSTI ID:988702
An exhaust aftertreatment system for an internal combustion engine is provided including an apparatus and method to inject a reductant into the exhaust gas feedstream. Included is a fuel metering device adapted to inject reductant into the exhaust gas feedstream and a controllable pressure regulating device. A control module is operatively connected to the reductant metering device and the controllable pressure regulating device, and, adapted to effect flow of reductant into the exhaust gas feedstream over a controllable flow range.
Research Organization:
General Motors Corporation
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-02NT41218
Assignee:
GM Global Technology Operations, Inc. (Detroit, MI)
Patent Number(s):
7,591,132
Application Number:
11/533,425
OSTI ID:
988702
Country of Publication:
United States
Language:
English

References (3)

Selective Catalytic Reduction of NOx with N-Free Reductants journal January 1995
Selective Catalytic Reduction of NOx Emissions from a 5.9 Liter Diesel Engine Using Ethanol as a Reductant conference October 2003
In-Cylinder Production of Hydrogen During Net-Lean Diesel Operation conference April 2006

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