公开(公告)号：US11435332B2

公开(公告)日：2022-09-06

申请号：US17032551

申请日：2020-09-25

Applicant: GM Global Technology Operations LLC

Inventor： David P. Quigley ,  Sarah Funk ,  Kevin J. McKay ,  Scott R. Zechiel ,  Ruggiero Chiariello

IPC: G01N33/00 ,  G01M15/10

Abstract: A method for reducing sensor noise in an automobile vehicle NOx sensor offset diagnostic includes: connecting an exhaust system to an engine of an automobile vehicle; sensing a condition of the exhaust system using at least one NOx sensor; identifying when the at least one NOx sensor is at a low noise condition; and running a diagnostic to identify conditions of the at least one NOx sensor. The method further includes selecting one of the low noise condition as the engine in an after-run condition or as the engine in an engine idle condition.

公开(公告)号：US20220099642A1

公开(公告)日：2022-03-31

申请号：US17032551

申请日：2020-09-25

Applicant: GM Global Technology Operations LLC

Inventor： David P. Quigley ,  Sarah Funk ,  Kevin J. McKay ,  Scott R. Zechiel ,  Ruggiero Chiariello

IPC: G01N33/00 ,  G01M15/10

Abstract: A method for reducing sensor noise in an automobile vehicle NOx sensor offset diagnostic includes: connecting an exhaust system to an engine of an automobile vehicle; sensing a condition of the exhaust system using at least one NOx sensor; identifying when the at least one NOx sensor is at a low noise condition; and running a diagnostic to identify conditions of the at least one NOx sensor. The method further includes selecting one of the low noise condition as the engine in an after-run condition or as the engine in an engine idle condition.