公开(公告)号：US08408055B2

公开(公告)日：2013-04-02

申请号：US12511560

申请日：2009-07-29

申请人： Michiel J. Van Nieuwstadt ,  Jian Kong ,  Christopher Oberski ,  Norman Hiam Opolsky ,  Kirk Andrew Parrish ,  Jim Bromham

发明人： Michiel J. Van Nieuwstadt ,  Jian Kong ,  Christopher Oberski ,  Norman Hiam Opolsky ,  Kirk Andrew Parrish ,  Jim Bromham

IPC分类号： G01M15/00

CPC分类号： F01N3/10 ,  F01N3/035 ,  F01N3/2066 ,  F01N9/002 ,  F01N11/007 ,  F02D41/029 ,  F02D41/1441 ,  F02D41/1446 ,  F02D41/1454 ,  F02D41/221 ,  F02D41/3872 ,  F02D2200/022

摘要： 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.

公开(公告)号：US20110023590A1

公开(公告)日：2011-02-03

申请号：US12511560

申请日：2009-07-29

申请人： Michiel J. Van Nieuwstadt ,  Jian Kong ,  Christopher Oberski ,  Norman Hiam Opolsky ,  Kirk Andrew Parrish ,  Jim Bromham

发明人： Michiel J. Van Nieuwstadt ,  Jian Kong ,  Christopher Oberski ,  Norman Hiam Opolsky ,  Kirk Andrew Parrish ,  Jim Bromham

IPC分类号： G01M15/10

CPC分类号： F01N3/10 ,  F01N3/035 ,  F01N3/2066 ,  F01N9/002 ,  F01N11/007 ,  F02D41/029 ,  F02D41/1441 ,  F02D41/1446 ,  F02D41/1454 ,  F02D41/221 ,  F02D41/3872 ,  F02D2200/022

摘要： 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.

摘要翻译： 描述了用于监测和检测可能发生在联合到稀燃燃烧发动机的排气后处理系统中的不期望的放热的方法。 在一种特定方法中，可以基于排气后处理系统沿废气排气方向的长度的预期氧耗竭来指示不需要的放热。 例如，在DPF再生期间，预期将一定量的氧用于除去烟灰。 如果在排气系统下游的排气中实际发现氧少，则可能存在不需要的放热，因为排气中可能存在非预期的还原剂，并与氧气放热反应。 然后响应于不期望的放热的指示可以启动各种缓解动作。