Diesel aftertreatment systems
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United States of America Patent
Stats
-
Jan 31, 2006
Grant Date -
May 19, 2005
app pub date -
Nov 19, 2003
filing date -
Nov 21, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An accurate thermodynamic model of an Active Lean NOx (ALNC) Catalyst is presented. The model takes into account hydrocarbon storage and release mechanisms of the ALNC, as well as the degradation in the ALNC hydrocarbon conversion efficiency due to ageing, and thus provides a more accurate estimate of an exotherm generated by hydrocarbon combustion in the ALNC. The estimated exotherm can them be used to detect system degradation and identify components responsible for the degradation.
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