公开(公告)号：EP2635888B1

公开(公告)日：2017-05-31

申请号：EP10838254.0

申请日：2010-12-16

申请人： Cummins Filtration IP, Inc.

发明人： LIN, Xiao ,  WILHELM, Daniel, W. ,  QI, Baohua ,  WEI, Xi

IPC分类号： G01M15/00 ,  F01N3/20 ,  F01N11/00

CPC分类号： F01N3/208 ,  F01N3/2066 ,  F01N11/00 ,  F01N2550/00 ,  F01N2560/026 ,  F01N2560/14 ,  F01N2900/0404 ,  F01N2900/1402 ,  F02D41/024 ,  F02D41/0275 ,  F02D41/1441 ,  F02D41/146 ,  F02D41/222 ,  F02D2041/1432 ,  Y02T10/24 ,  Y02T10/47

公开(公告)号：EP2635888A1

公开(公告)日：2013-09-11

申请号：EP10838254.0

申请日：2010-12-16

申请人： Cummins Filtration IP, Inc.

发明人： LIN, Xiao ,  WILHELM, Daniel, W. ,  QI, Baohua ,  WEI, Xi

IPC分类号： G01M15/00

CPC分类号： F01N3/208 ,  F01N3/2066 ,  F01N11/00 ,  F01N2550/00 ,  F01N2560/026 ,  F01N2560/14 ,  F01N2900/0404 ,  F01N2900/1402 ,  F02D41/024 ,  F02D41/0275 ,  F02D41/1441 ,  F02D41/146 ,  F02D41/222 ,  F02D2041/1432 ,  Y02T10/24 ,  Y02T10/47

摘要： A method includes raising a temperature of an SCR catalyst for a predetermined time period while dosing urea. The method further includes maintaining the temperature of the SCR catalyst without dosing urea for a second predetermined time period. The method further includes filtering out at least low frequency data from a first NO
x sensor upstream of the SCR catalyst and from a second NO
x sensor downstream of the SCR catalyst, and comparing the filtered data from the first NO
x sensor and the second NO
x sensor without dosing urea over a third predetermined time period. The method further includes providing a NO
x sensor condition index for at least one of the first NOx sensor and the second NO
x sensor in response to the comparing.