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. 25, 2018
Filed:
Sep. 15, 2015
Cummins Emission Solutions, Inc., Columbus, IN (US);
Michael J. Cunningham, Greenwood, IN (US);
Phanindra V. Garimella, Bloomington, IN (US);
Venkata R. Lakkireddy, Columbus, IN (US);
Ming-Feng Hsieh, Nashville, IN (US);
Cummins Emission Solutions, Inc., Columbus, IN (US);
Abstract
A system for and method of diagnosing operation of a partial filtration filter exhaust aftertreatment system are provided. An upstream exhaust temperature value is determined in an exhaust system upstream of at least one of a diesel oxidation catalyst (DOC) component and a first partial flow filter (PFF) component. A downstream exhaust temperature value is determined in the exhaust system downstream of a second PFF component positioned downstream of the at least one of the DOC component and the first PFF component. A frequency difference is determined between a first frequency content of the upstream exhaust temperature value and a second frequency content of the downstream exhaust temperature value. If the frequency is less than a predetermined threshold, it is determined that at least one of the DOC component and the PFF component are not present in the exhaust system.