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:
Jan. 09, 2007
Filed:
Sep. 22, 2005
Mark D. Carr, Fenton, MI (US);
Joseph R. Dulzo, Novi, MI (US);
Christopher R. Graham, Lake Orion, MI (US);
Richard B. Jess, Haslett, MI (US);
Ian J. Macewen, White Lake, MI (US);
Onassis Matthews, Novi, MI (US);
Jeffrey A. Sell, West Bloomfield, MI (US);
Michael J. Svestka, Waterford, MI (US);
Julian R. Verdejo, Brighton, MI (US);
Mark D. Carr, Fenton, MI (US);
Joseph R. Dulzo, Novi, MI (US);
Christopher R. Graham, Lake Orion, MI (US);
Richard B. Jess, Haslett, MI (US);
Ian J. MacEwen, White Lake, MI (US);
Onassis Matthews, Novi, MI (US);
Jeffrey A. Sell, West Bloomfield, MI (US);
Michael J. Svestka, Waterford, MI (US);
Julian R. Verdejo, Brighton, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A method of estimating composition of fuel in the fuel tank of a vehicle. A refuel event is detected. Fuel consumption is monitored during a plurality of stages after the refuel event. A plurality of fuel trim shift values are determined relative to the stages. The fuel trim shift values are used to estimate a fuel composition change. This method eliminates a need for a hardware fuel composition sensor and also provides dynamic filtering of fuel trim values.