US 12,228,471 B2
NOx sensor monitoring
Eike Sixel, Kiel (DE); Andreas Banck, Altenholz (DE); and Hauke Holst, Dänischenhagen (DE)
Assigned to Caterpillar Motoren GmbH & Co. KG, Kiel (DE)
Appl. No. 18/288,075
Filed by Caterpillar Motoren GmbH & Co. KG, Kiel (DE)
PCT Filed Apr. 21, 2022, PCT No. PCT/EP2022/025165
§ 371(c)(1), (2) Date Oct. 24, 2023,
PCT Pub. No. WO2022/228717, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 2105934 (GB), filed on Apr. 26, 2021.
Prior Publication US 2024/0210279 A1, Jun. 27, 2024
Int. Cl. G01M 15/10 (2006.01); F01N 11/00 (2006.01); F02B 77/08 (2006.01); G08B 21/18 (2006.01)
CPC G01M 15/102 (2013.01) [F01N 11/007 (2013.01); F01N 2550/02 (2013.01); F01N 2900/04 (2013.01); F01N 2900/0418 (2013.01); F01N 2900/0422 (2013.01); F02B 77/083 (2013.01); F02B 77/086 (2013.01); G08B 21/182 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A system for monitoring measured NOx values in an exhaust component, comprising a first NOx sensor having a first predetermined maintenance interval and a second NOx sensor having a second predetermined maintenance interval
characterized in that
the first and second NOx sensors are configured such that their first and second maintenance intervals are staggered.
 
6. A method for monitoring measured NOx values in an exhaust component, comprising the steps of:
installing a first NOx sensor having a first predetermined maintenance interval in an exhaust component
installing a second NOx sensor having a second predetermined maintenance interval after the first NOx sensor has been operating for a predetermined operation duration such that the first and second maintenance intervals are staggered.