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. 02, 2015
Filed:
Jun. 09, 2011
Kushal Narayanaswamy, Sterling Heights, MI (US);
Calvin K. Koch, Bloomfield Hills, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Gerald A. Szekely, Jr., Sterling Heights, MI (US);
Joel G. Toner, Bad Axe, MI (US);
Kushal Narayanaswamy, Sterling Heights, MI (US);
Calvin K. Koch, Bloomfield Hills, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Gerald A. Szekely, Jr., Sterling Heights, MI (US);
Joel G. Toner, Bad Axe, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A spark-ignition, direct-injection internal combustion engine is coupled to an exhaust aftertreatment system including a three-way catalytic converter upstream of an NH3-SCR catalyst. A method for operating the engine includes operating the engine in a fuel cutoff mode and coincidentally executing a second fuel injection control scheme upon detecting an engine load that permits operation in the fuel cutoff mode.