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

United States Patent

September 22, 2009
View the Complete Patent at the US Patent & Trademark Office
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.
Viola; Michael B. (Macomb Township, MI)
GM Global Technology Operations, Inc. (Detroit, MI)
11/ 533,425
September 20, 2006
GOVERNMENT CONTRACT RIGHTS The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of DE-FC26-02NT41218 awarded by the U.S. Department of Energy.