US 11,945,401 B2
Detecting sensor malfunction or tampering based on reductant consumption
Jay Venkataraghavan, Dunlap, IL (US); Baoyong Liu, San Antonio, TX (US); Urvish Joshi, Dunlap, IL (US); and Kevin Lloyd Dea, Morton, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Mar. 31, 2022, as Appl. No. 17/657,589.
Prior Publication US 2023/0311808 A1, Oct. 5, 2023
Int. Cl. B60R 25/10 (2013.01); G07C 5/08 (2006.01); G08B 29/04 (2006.01)
CPC B60R 25/101 (2013.01) [G07C 5/0816 (2013.01); G08B 29/046 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for detecting level sensor malfunction or tampering based on reductant consumption in an aftertreatment system, the method comprising:
receiving, at one or more processors, dosing data associated with an amount of DEF supplied to the aftertreatment system;
receiving, by the one or more processors, tank level data from a level sensor in a DEF tank;
comparing, by the one or more processors, the dosing data with the tank level data as part of a primary check; and
based on the comparison:
initiating, by the one or more processors, a quality check, wherein the quality check is performed with one or more NOx sensors; and
causing, by the one or more processors, a presentation of an indication that the quality check is being initiated.