Invention Grant
- Patent Title: Method to diagnose SCR catalyst
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Application No.: US14136894Application Date: 2013-12-20
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Publication No.: US09638122B2Publication Date: 2017-05-02
- Inventor: Jason Ronald Smith , John Paul Bogema , Peter Mitchell Lyon , John Anthony Mangion , Kevin R. Murphy , Darrin Blaine Luke
- Applicant: Ford Global Technologies, LLC
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: McCoy Russell LLP
- Agent Julia Voutyras
- Main IPC: F01N3/00
- IPC: F01N3/00 ; F02D41/02 ; F01N3/20 ; F01N11/00 ; F02D41/14 ; F02D41/40
Abstract:
Methods and systems are described for an engine with a SCR system including NOx sensors upstream and downstream of catalyst. One method includes monitoring SCR performance via calculating SCR conversion efficiency at different catalyst temperatures. Further, feedgas NOx levels are artificially increased when SCR device temperature is above a threshold to obtain more reliable readings from NOx sensors.
Public/Granted literature
- US20150176512A1 METHOD TO DIAGNOSE SCR CATALYST Public/Granted day:2015-06-25
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