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. 24, 2012
Filed:
May. 12, 2008
James Joshua Driscoll, Dunlap, IL (US);
Wade J. Robel, Peoria, IL (US);
Praveen S. Chavannavar, Dunlap, IL (US);
James Joshua Driscoll, Dunlap, IL (US);
Wade J. Robel, Peoria, IL (US);
Praveen S. Chavannavar, Dunlap, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An exhaust treatment control system includes a controller configured to determine a value representative of a NOconcentration associated with an exhaust gas upstream of a selective catalytic reduction (SCR) catalyst, and determine a value representative of a NO concentration associated with the exhaust gas upstream of the SCR catalyst. The controller can also be configured to transmit a signal to at least partially control an injection of a hydrocarbon into the exhaust gas, wherein the hydrocarbon injection can occur upstream of an oxidation catalyst to at least partially decrease the NOconcentration of the exhaust gas downstream of the oxidation catalyst, and wherein the oxidation catalyst can be located upstream of the SCR catalyst.