06125629 is referenced by 114 patents and cites 35 patents.

An external reductant for an SCR vehicular NO.sub.x emission control system is selectively injected to SCR catalysts which are only at catalytically active temperatures thereby avoiding reductant absorption in catalytically unactive catalysts and improving conversion response time.

Title
Staged reductant injection for improved NO.sub.x reduction
Application Number
9/191779
Publication Number
6125629
Application Date
November 13, 1998
Publication Date
October 3, 2000
Inventor
Joseph A Patchett
Basking Ridge
NJ, US
Agent
Richard A Negin
Assignee
Engelhard Corporation
NJ, US
IPC
F01N 3/00
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