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:
Jul. 28, 2015
Filed:
Aug. 01, 2012
Douglas Christopher Sarsen, Howell, MI (US);
Christopher Whitt, Howell, MI (US);
Christopher C. Swoish, Lapeer, MI (US);
Rebecca J. Darr, Milford, MI (US);
Douglas Christopher Sarsen, Howell, MI (US);
Christopher Whitt, Howell, MI (US);
Christopher C. Swoish, Lapeer, MI (US);
Rebecca J. Darr, Milford, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method of correcting a soot mass estimate in a vehicle exhaust aftertreatment device includes monitoring an exhaust gas pressure drop across a particulate filter included with the vehicle exhaust aftertreatment device. Following the detection of a pressure drop, a controller may determine a soot mass estimate from the monitored pressure drop; determine an ash volume estimate representative of an amount of ash within the particulate filter; determine an ash correction factor from the soot mass estimate and the ash volume estimate; and calculate a corrected soot mass value by multiplying the ash correction factor with the soot mass estimate. If the corrected soot mass value exceeds a threshold, the controller may generate a corresponding particulate filter regeneration request.