公开(公告)号：US09765666B2

公开(公告)日：2017-09-19

申请号：US15018993

申请日：2016-02-09

申请人： Michael A Smith ,  Craig L Dimaggio ,  Jeffrey P Wuttke ,  Andrew Brocker ,  Travis T Hamilton ,  Ken Hardman ,  Cody Baldwin-Squib

发明人： Michael A Smith ,  Craig L Dimaggio ,  Jeffrey P Wuttke ,  Andrew Brocker ,  Travis T Hamilton ,  Ken Hardman ,  Cody Baldwin-Squib

IPC分类号： F01N3/00 ,  F01N3/10 ,  F01N3/20 ,  F01N13/00 ,  F01N13/10 ,  F01N3/08 ,  F01N13/04

CPC分类号： F01N3/2073 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/106 ,  F01N3/208 ,  F01N13/008 ,  F01N13/011 ,  F01N13/04 ,  F01N13/107 ,  F01N2240/25 ,  F01N2430/02 ,  F01N2430/06 ,  F01N2610/02 ,  F01N2900/1616 ,  F01N2900/1814 ,  Y02T10/22 ,  Y02T10/24

摘要： A system and method for utilizing fuel as an on-board reductant for selective catalytic reduction of NOx is provided and includes a controller for controlling an engine to produce a lean first exhaust stream and a rich second exhaust stream that are received in respective first and second passageways of a dual path aftertreatment system. The rich second exhaust stream reacts with NOx stored in a NOx storage and reduction catalyst of the second passageway to regenerate this catalyst and generate ammonia. The first exhaust stream and the second exhaust stream having the generated ammonia are combined in a downstream common passageway to form a combined lean exhaust gas stream where the ammonia carried therein is stored or used by an SCR catalyst of the common passageway for NOx reduction. The engine is subsequently controlled to produce a rich first exhaust stream and a lean second exhaust stream.

公开(公告)号：US09739761B2

公开(公告)日：2017-08-22

申请号：US14567632

申请日：2014-12-11

申请人： Michael A Smith ,  Kiran Premchand ,  Homayoun Ahari ,  Jeffrey P Wuttke ,  Brett Schubring ,  Craig L Dimaggio ,  Michael G Zammit ,  Michael T Vincent

发明人： Michael A Smith ,  Kiran Premchand ,  Homayoun Ahari ,  Jeffrey P Wuttke ,  Brett Schubring ,  Craig L Dimaggio ,  Michael G Zammit ,  Michael T Vincent

IPC分类号： G01N15/06 ,  G01N33/00 ,  F01N9/00 ,  G01M15/10 ,  G01N1/38 ,  F02B3/06 ,  G01N1/22 ,  G01N1/24

CPC分类号： G01N33/004 ,  F01N9/002 ,  F02B3/06 ,  G01M15/106 ,  G01N1/2205 ,  G01N1/24 ,  G01N1/38 ,  G01N15/0656 ,  G01N33/0037 ,  Y02A50/245 ,  Y02A50/25

摘要： A diagnostic system and method for diagnosing the performance of a particulate matter (PM) filter of an exhaust system each involve receiving, by a controller from at least one sensor, a gas component measurement of exhaust gas flowing through the exhaust system and the PM filter. The controller calculates a conversion efficiency of the gas component by the PM filter and compares the calculated conversion efficiency to a predetermined conversion efficiency threshold indicative of an expected conversion efficiency of a flow-through catalyst. The controller then determines whether the PM filter is cracked or damaged based on the comparison between the calculated conversion efficiency and the predetermined conversion efficiency threshold.