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:
Mar. 09, 2010
Filed:
Sep. 11, 2007
Mark D. Carr, Fenton, MI (US);
Louis A. Avallone, Milford, MI (US);
Ian J. Macewen, White Lake, MI (US);
Wajdi B. Hamama, Whitmore Lake, MI (US);
Julian R. Verdejo, Farmington, MI (US);
Mark D. Carr, Fenton, MI (US);
Louis A. Avallone, Milford, MI (US);
Ian J. MacEwen, White Lake, MI (US);
Wajdi B. Hamama, Whitmore Lake, MI (US);
Julian R. Verdejo, Farmington, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A system for estimating fuel concentration comprises an ethanol estimating module that generates an ethanol estimate based on baseline closed loop corrections (CLC). A fuel system module controls fuel to an engine and generates a fuel system error. The ethanol estimating module selectively adjusts the baseline CLC and the ethanol estimate based on the fuel system error. A method for estimating fuel concentration comprises generating an ethanol estimate based on baseline closed loop corrections (CLC); controlling fuel to an engine and generating a fuel system error; and selectively adjusting said baseline CLC and said ethanol estimate based on said fuel system error.