Cummins Emission Solutions Inc.

Randal D Watts

Jinqian Gong

Daniel D Wilhelm

Vikram Sundararajan

Kerang Wang

A system, method, and apparatus for sensor tampering detection are provided. An aftertreatment system comprises a first leg comprising a first Selective Catalytic Reduction (SCR) system, a first doser, and a first NOx sensor, a second leg comprising a second SCR system, a second doser, and a second NOx sensor, and a controller. The controller determines satisfaction of enabling conditions. The controller doses reductant to the first and second SCR systems. The controller determines NOx values of the first SCR system and the second SCR system. The controller adjust the dosing of the first SCR system for a time period. The controller measures NOx values of the first SCR system and the second SCR system. The controller determines a difference between the third and first NOx values and a difference between the fourth and second NOx values. The controller generates an indication regarding whether the first NOx sensor is displaced.

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Hartsville, IN, United States of America

Randal D Watts