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:
Jul. 04, 1995
Filed:
May. 11, 1994
Robert M Bennett, Monument, CO (US);
David P Laude, Colorado Springs, CO (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A method and circuit for generating an output signal representative of the pumping current required to equalize the oxygen diffusion between the sensing cell and the pumping cell of an oxygen-ion concentration proportional sensor located in the exhaust system of an internal combustion engine. A replication current, which is isolated from but representative of the pumping current, is generated. The replication current is then passed through a load resistance for generating the output signal. The replication current is generated simultaneously with but isolated from the pumping current, thereby eliminating the need for separate amplification of a sensed version of the pumping current.