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:
Dec. 23, 2008
Filed:
May. 20, 2005
David P. Sczomak, Troy, MI (US);
David B. Brown, Brighton, MI (US);
Stephen K. Fulcher, Clovis, NM (US);
Jesse M. Gwidt, Brighton, MI (US);
Michael J. Lucido, Northville, MI (US);
Christopher R. Graham, Lake Orion, MI (US);
David P. Sczomak, Troy, MI (US);
David B. Brown, Brighton, MI (US);
Stephen K. Fulcher, Clovis, NM (US);
Jesse M. Gwidt, Brighton, MI (US);
Michael J. Lucido, Northville, MI (US);
Christopher R. Graham, Lake Orion, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
An engine control system that regulates fuel to an engine after lean idle operation includes a first module that determines a rich mass fuel rate based on a lean operation mass air flow and a stoichiometric air to fuel ratio (AFR) and that calculates a time rich based on the rich mass fuel rate. A second module regulates fuel to the engine during a rich operation period after the lean idle operation to provide the rich mass fuel rate for the time rich.