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:
Dec. 22, 2020
Filed:
Jun. 27, 2017
Cummins Emission Solutions Inc., Columbus, IN (US);
Jinqian Gong, Columbus, IN (US);
Varun R. Rajagopal, Columbus, IN (US);
Cummins Emission Solutions Inc., Columbus, IN (US);
Abstract
System and methods for detecting NHslip using cross-sensitivity of an NOsensor may include accessing a temperature value for a catalyst and determining the temperature value for the catalyst exceeds a predetermined value. If the temperature exceeds the predetermined value, a system-out NOmeasurement signal from the system-out NOsensor and an estimated system-out NOvalue are used to calculate a delta value. A flag is set indicative of NHslip for an exhaust system responsive to an average of delta values for a predetermined period of time exceeding a predetermined value. If the temperature does not exceed the predetermined value, then an average of a plurality of system-out NOmeasurement signals can be calculated and a flag is set indicative of NHslip responsive to the calculated average for a predetermined period of time exceeding a predetermined value.