Diesel aftertreatment systems
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 10, 2006
Grant Date -
Nov 11, 2004
app pub date -
May 7, 2003
filing date -
May 7, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for accurately diagnosing deterioration in an emission control system for a lean burn internal combustion engine is presented. The emission control system includes an Active Lean NOx (ALNC) Catalyst and a system for injecting a hydrocarbon-based reductant into the ALNC thereby improving its NOx conversion efficiency. The method teaches calculating a rate of change of exotherm across the ALNC and differentiating between deterioration of the ALNC and deterioration of the reductant injection system based on the magnitude and the sign of the rate of change of the exotherm. Once the diagnosis of deterioration is made, and the deteriorated component is identified, appropriate corrective measures, such as adjusting or discontinuing the reductant injection amount, and setting diagnostic codes, are taken.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully