DETECTING SENSOR MALFUNCTION OR TAMPERING BASED ON REDUCTANT CONSUMPTION

• Main Authors: JOSHI, Urvish, VENKATARAGHAVAN, Jay, DEA, Kevin Lloyd, LIU, Baoyong
• Format: Patent
• Language: English
• Published: 05.10.2023
• Subjects: ALARM SYSTEMS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE; CHECKING-DEVICES; GENERATING RANDOM NUMBERS; ORDER TELEGRAPHS; PERFORMING OPERATIONS; PHYSICS; REGISTERING OR INDICATING THE WORKING OF MACHINES; SIGNALLING; SIGNALLING OR CALLING SYSTEMS; TIME OR ATTENDANCE REGISTERS; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR; VOTING OR LOTTERY APPARATUS

A systems for detecting level sensor malfunction or tampering based on reductant consumption and determining when to initiate a quality check of reductant used in an aftertreatment system are disclosed. The system comprises a memory storing instructions and a processor executing the instructions to perform a process including: receiving dosing data associated with an amount of DEF supplied to the aftertreatment system; receiving tank level data from a level sensor in a DEF tank; comparing the dosing data with the tank level data; and based on the comparison: initiating, by the one or more processors, a quality check; and/or determining, by the one or more processors, a possible error requiring further diagnostics; and causing to present, by the one or more processors, an indication that the quality check is being initiated and/or that a possible error requires further diagnostics on a display.