公开(公告)号：US12071876B1

公开(公告)日：2024-08-27

申请号：US18225281

申请日：2023-07-24

申请人： Caterpillar Inc.

发明人： Joshua L. Ratts ,  Hrishi Lalit Shah ,  Deepashri Phatak

IPC分类号： F01N11/00 ,  B01D53/94 ,  F01N3/20 ,  F01N13/00

CPC分类号： F01N11/00 ,  B01D53/9418 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/208 ,  F01N13/008 ,  B01D2251/2067 ,  B01D2257/404 ,  B01D2258/012 ,  F01N2550/02 ,  F01N2900/0601 ,  F01N2900/1402

摘要： An aftertreatment system for an engine on a work machine may include a selective catalytic reduction (SCR) system configured for arrangement downstream of the engine and having a dosing system for dosing the SCR system with treatment fluid. The aftertreatment system may also include a NOxin sensor arranged at or near the inlet of the SCR system, a NOxout sensor arranged at or near the outlet of the SCR system, and an SCR catalyst monitoring module configured to periodically establish a maximum NOx conversion capacity of an SCR catalyst in the SCR system. A method for determining a maximum conversion capacity at a selected number or working hours and/or determining a remaining useful life of the SCR catalyst is also provided.

公开(公告)号：US11933211B2

公开(公告)日：2024-03-19

申请号：US17552636

申请日：2021-12-16

申请人： Caterpillar Inc.

发明人： Deepashri Phatak ,  Dereck G Heffron ,  Jun Cai

IPC分类号： F01N3/20 ,  F04B49/06 ,  F04B51/00 ,  G05B23/02

CPC分类号： F01N3/2066 ,  F01N2550/05 ,  F01N2590/08 ,  F01N2610/1433 ,  F01N2900/1808 ,  F01N2900/1822 ,  F04B49/065 ,  F04B51/00 ,  F04B2205/05 ,  G05B23/0221

摘要： Operating an engine exhaust aftertreatment system includes receiving fluid pressure data of a reductant pump, determining a pump operating state, and comparing a pump health parameter to a prognostic pump failure criterion based upon the determining a pump operating state. Operating an engine exhaust aftertreatment system further includes outputting a pump health alert based upon a difference between the pump health parameter and the prognostic pump failure criterion. Related control logic is also disclosed.

公开(公告)号：US20230193802A1

公开(公告)日：2023-06-22

申请号：US17552636

申请日：2021-12-16

申请人： Caterpillar Inc.

发明人： Deepashri Phatak ,  Dereck G. Heffron ,  Jun Cai

IPC分类号： F01N11/00 ,  F01N3/20

CPC分类号： F01N11/00 ,  F01N3/2066 ,  F01N2550/05 ,  F01N2590/08 ,  F01N2610/1433 ,  F01N2900/1808 ,  F01N2900/1822

摘要： Operating an engine exhaust aftertreatment system includes receiving fluid pressure data of a reductant pump, determining a pump operating state, and comparing a pump health parameter to a prognostic pump failure criterion based upon the determining a pump operating state. Operating an engine exhaust aftertreatment system further includes outputting a pump health alert based upon a difference between the pump health parameter and the prognostic pump failure criterion. Related control logic is also disclosed.

公开(公告)号：US11615660B2

公开(公告)日：2023-03-28

申请号：US16950623

申请日：2020-11-17

申请人： Caterpillar Inc.

发明人： Deepashri Phatak ,  Dereck G Heffron ,  Joseph Patrick Karasch

IPC分类号： G07C5/08 ,  F02B37/00 ,  F02B39/16 ,  F02D41/22 ,  G07C5/00

摘要： A controller may obtain data associated with operation of an engine of a machine that comprises a first engine bank associated with a first set of turbochargers and a second engine bank associated with a second set of turbochargers, and may determine, based on the data, that the engine is in an operating state that requires the first and second sets of turbochargers to be operative. The controller may determine, based on the data, a difference in operation of the first engine bank and the second engine bank and identify, based on the data, a turbocharger failure condition associated with a particular set of turbochargers, of the first and second sets of turbochargers. The controller may identify, based on the data, a particular turbocharger, of the particular set of turbochargers, as a failed turbocharger, and may perform one or more actions based on identifying the particular turbocharger.