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. 10, 2014
Filed:
Aug. 20, 2009
System and method for controlling reducing agent injection in a selective catalytic reduction system
Jason Daniel Mullins, Howell, MI (US);
Rebecca J Darr, Milford, MI (US);
Kyle E. Crawford, Howell, MI (US);
Paul Jasinkiewicz, Northville, MI (US);
Jason Daniel Mullins, Howell, MI (US);
Rebecca J Darr, Milford, MI (US);
Kyle E. Crawford, Howell, MI (US);
Paul Jasinkiewicz, Northville, MI (US);
Abstract
An engine control system includes a dosing control module and an offset determination module. The dosing control module actuates an injector to inject a first amount of reducing agent into exhaust gas produced by an engine during a period when a temperature of the exhaust gas is greater than a predetermined temperature threshold. The offset determination module determines an efficiency of a selective catalytic reduction (SCR) material based on measured amounts of nitrogen oxide (NOx) during the period and expected NOx amounts, wherein the measured amounts of NOx are measured at locations upstream and downstream from the SCR material, and wherein the expected NOx amounts are based on the temperature of the exhaust gas and the first amount of reducing agent.