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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.:

US 4841934 B1

PDFFull Text
Date of Patent:
Jun. 27, 1989

Filed:

Feb. 20, 1987

Oxygen pumping device for control of the air fuel ratio

Applicant:
Inventors:

Eleftherios M Logothetis, Birmingham, MI (US);

Robert E Hetrick, Dearborn Heights, MI (US);

Richard E Soltis, Redford, MI (US);

William C Vassell, Birmingham, MI (US);

Assignee:

Ford Motor Company, Dearborn, MI (US);

Attorneys:

Abolins; Peter

Sadler; Clifford L.

Primary Examiner:

Andrew M Dolinar

Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
123440 ; 204 / ; 204406 ;
Abstract

A method of controlling the air fuel ratio of an internal combustion engine includes positioning a two cell oxygen pumping device in the exhaust gas of the engine. A pumping current is applied to a pumping cell and an EMF is sensed across a sensor cell. The sensed EMF is compared to reference voltage and an error signal is generated. The air fuel ratio is changed in response to the error signal so as to reduce the absolute magnitude of the error signal.

Find Patent Forward Citations

Logothetis, Eleftherios. (1989). Oxygen pumping device for control of the air fuel ratio (U.S. Patent No. 4841934). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4841934

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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