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. 25, 2000
Filed:
Feb. 20, 1998
Applicant:
Inventor:
Joel Douglas Dalton, Ann Arbor, MI (US);
Assignee:
Ford Global Technologies, Inc., Dearborn, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
123695 ; 123 / ; 123575 ;
Abstract
A fuel blending ratio inferring method responsive to an air/fuel feedback control system for an internal combustion engine is disclosed having a feedback correction loop generating a feedback variable derived from an output of an exhaust gas sensor. A fuel blending ratio is inferred in response to a refueling indication by observing the size and magnitude of the feedback variable. Thus, the effect of the fuel blend can be isolated from other errors in the feedback control system.