Method for biasing a hego sensor in a feedback control system

U.S. Patent Number: 5383333

Abstract: A system for maintaining engine air/fuel operation within the efficiency window of a catalytic converter. Fuel delivered to the engine is adjusted in response to a step change in an output of an exhaust gas oxygen sensor positioned upstream of the converter. The step change is shifted in response to an error signal derived from a downstream emissions sensor.

Inventors: Logothetis; Eleftherios M. (Birmingham, MI), Hamburg; Douglas R. (Bloomfield Hills, MI), Cook; Jeffrey A. (Dearborn, MI), Rimai; Lajos (Dearborn, MI)

Assignee: Ford Motor Company (Dearborn, MI)

Application Number: 08/132,267

Issued: 1995-01-24

Expired: 2007-01-24

Classes: 60/276 ; 123/703; 60/285

Field of search: 60/274,276,285 123/703

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