US 11,988,125 B2
Method for automatically detecting clogging of a sensor pipe extending between a pressure sensor and an exhaust manifold of an internal combustion engine
José Luis Martinez Gordon, Lyons (FR); Hervé Queret, Saint-Just Chaleyssin (FR); Damien Daulon, Lyons (FR); and Franck Chagnot Auclair, Sainte-Anne-sur-Gervonde (FR)
Assigned to VOLVO TRUCK CORPORATION, Gothenburg (SE)
Appl. No. 17/793,703
Filed by VOLVO TRUCK CORPORATION, Gothenburg (SE)
PCT Filed Feb. 18, 2020, PCT No. PCT/EP2020/054181
§ 371(c)(1), (2) Date Jul. 19, 2022,
PCT Pub. No. WO2021/164849, PCT Pub. Date Aug. 26, 2021.
Prior Publication US 2023/0068752 A1, Mar. 2, 2023
Int. Cl. F01N 11/00 (2006.01); F01N 13/00 (2010.01)
CPC F01N 11/002 (2013.01) [F01N 13/008 (2013.01); F01N 2550/00 (2013.01); F01N 2560/08 (2013.01); F01N 2590/08 (2013.01); F01N 2900/0422 (2013.01); F01N 2900/1406 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for automatically detecting clogging of a sensor pipe extending between a pressure sensor and an exhaust manifold of an internal combustion engine, wherein the pressure sensor enables to record a signal representative of a relative pressure over time, the method comprising:
monitoring, from a time the internal combustion engine has been turned off, the signal over a second period of time (T2), the sensor pipe being considered clogged when an integral of the signal over the second period of time (T2) is greater than a second threshold; and
triggering an alert towards an operator of the internal combustion engine when the sensor pipe is considered clogged.