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:
Oct. 19, 1993
Filed:
Nov. 16, 1992
Applicant:
Inventor:
Judith M Curran, Northville, MI (US);
Assignee:
Ford Motor Company, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
123696 ; 123 / ;
Abstract
A proportional plus integral feedback control system is responsive to a two-state, filtered output signal from an exhaust gas oxygen sensor. The sensor's output is offset from stoichiometric switching by the presence of alcohol in the fuel blend. A correcting bias term is calculated and the average value of the feedback variable is appropriately biased by selection of the proportional plus integral terms.