Method to monitor HC-SCR catalyst NOx reduction performance for lean exhaust applications
Patent
·
OSTI ID:1042619
- Macomb Township, MI
- Troy, MI
- Oxford, MI
- Shelby Township, MI
- Clinton Township, MI
- Rochester Hills, MI
A method for initiating a regeneration mode in selective catalytic reduction device utilizing hydrocarbons as a reductant includes monitoring a temperature within the aftertreatment system, monitoring a fuel dosing rate to the selective catalytic reduction device, monitoring an initial conversion efficiency, selecting a determined equation to estimate changes in a conversion efficiency of the selective catalytic reduction device based upon the monitored temperature and the monitored fuel dosing rate, estimating changes in the conversion efficiency based upon the determined equation and the initial conversion efficiency, and initiating a regeneration mode for the selective catalytic reduction device based upon the estimated changes in conversion efficiency.
- Research Organization:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-02NT41218
- Assignee:
- GM Global Technology Operations LLC (Detroit, MI)
- Patent Number(s):
- 8,186,151
- Application Number:
- 12/480,932
- OSTI ID:
- 1042619
- Country of Publication:
- United States
- Language:
- English
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