公开(公告)号：US20190227043A1

公开(公告)日：2019-07-25

申请号：US15877654

申请日：2018-01-23

Applicant: Cummins Inc.

Inventor： Prabhu Jackson ,  Paul Daniel Borisuk

IPC: G01N33/00 ,  G01M15/10 ,  F01N13/00

Abstract: A method, system, and apparatus are provided for improving accuracy of sensor readings reflecting measurements of at least one constituent in an engine exhaust. The sensor measurement is corrected or compensated for by applying to a gain correction factor to the reported sensor measurement. The gain correction factor is developed by determination of prior test sensor readings correlated with discrete sensor age levels, and with constituent concentrations to which those test sensors are exposed. By applying the determined gain correction factor to change the sensor's reported measurements, bias may be reduced and a more accurate measure of actual constituent levels is provided.