Invention Grant
- Patent Title: Method to detect and mitigate unsolicited exotherms in a diesel aftertreatment system
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Application No.: US12511560Application Date: 2009-07-29
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Publication No.: US08408055B2Publication Date: 2013-04-02
- Inventor: Michiel J. Van Nieuwstadt , Jian Kong , Christopher Oberski , Norman Hiam Opolsky , Kirk Andrew Parrish , Jim Bromham
- Applicant: Michiel J. Van Nieuwstadt , Jian Kong , Christopher Oberski , Norman Hiam Opolsky , Kirk Andrew Parrish , Jim Bromham
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: Alleman Hall McCoy Russell & Tuttle LLP
- Agent Julia Voutyras
- Main IPC: G01M15/00
- IPC: G01M15/00

Abstract:
Methods for monitoring and detecting undesired exotherms which may occur in an exhaust aftertreatment system coupled to a lean burning combustion engine are described. In one particular approach, an undesired exotherm may be indicated based on an expected oxygen depletion along a length of an exhaust aftertreatment system in the direction of exhaust gas flow of exhaust gas. For example, during DPF regeneration, a certain amount of oxygen is expected to be utilized for removing soot. If less oxygen is actually found in the exhaust downstream of the exhaust system, then an undesired exotherm may be present, as unintended reductant may be present in the exhaust and reacting exothermically with oxygen. Various mitigation actions may then be initiated in response to the indication of an undesired exotherm.
Public/Granted literature
- US20110023590A1 METHOD TO DETECT AND MITIGATE UNSOLICITED EXOTHERMS IN A DIESEL AFTERTREATMENT SYSTEM Public/Granted day:2011-02-03
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