The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 29, 2025
Filed:
Jul. 19, 2024
Caterpillar Inc., Peoria, IL (US);
Drew D. Wackerlin, Chillicothe, IL (US);
Keerthana Prasad, Peoria Heights, IL (US);
Scott A. Wallington, Hopewell, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
The present disclosure is related to detection of a failed NOx sensor, which is crucial for modern combustion engine aftertreatment control, but its failure can cause false diagnostics, reduced engine performance, and lengthy troubleshooting. Accordingly, a system and method for detecting a NOx sensor in an engine through a NOx functional test is disclosed with a selective catalytic reduction SCR system, an ammonia source, a regeneration device, a NOx sensor positioned at an output stream of the SCR system, and an electronic control module in communication with the ammonia source and the NOx sensor. Furthermore, the electronic control module is configured to receive one or more signals from the NOx sensor.