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:
Jun. 25, 2013
Filed:
Jul. 22, 2010
Vadiraj P. Kulkarni, Dunlap, IL (US);
Matthew E. Leustek, Metamora, IL (US);
Sara K. Michels, Metamora, IL (US);
Rajesh N. Nair, Peoria, IL (US);
Michael A. Snopko, Washington, IL (US);
Andrew A. Knitt, Deer Creek, IL (US);
Vadiraj P. Kulkarni, Dunlap, IL (US);
Matthew E. Leustek, Metamora, IL (US);
Sara K. Michels, Metamora, IL (US);
Rajesh N. Nair, Peoria, IL (US);
Michael A. Snopko, Washington, IL (US);
Andrew A. Knitt, Deer Creek, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
Detecting ash in a diesel particulate filter includes receiving data indicative of signal attenuation for ash-responsive and ash-insensitive RF signals transmitted through a diesel particulate filter containing trapped soot and ash. A difference between the RF signals, such as a difference in signal attenuation, may be leveraged to detect a relative ash loading state or a change in relative ash loading state of the diesel particulate filter, and responsively indicate that filter cleaning is needed.