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. 13, 1998
Filed:
Jan. 17, 1997
Daniel V Orzel, Westland, MI (US);
David Karl Bidner, Livonia, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A method and system for monitoring fuel delivery to an internal combustion engine having a first and second mode of operation and controlling the engine accordingly. An oxygen content of exhaust gas emitted from the engine is sensed and a corresponding oxygen content signal is generated. Air fuel ratio correction data is determined based on the oxygen content signal. If the engine is operating in the first mode, the air fuel ratio correction data is compared to a first set of predetermined air fuel ratio correction thresholds and a first failure signal is generated based on the comparison between the air fuel ratio correction data and the first set of predetermined air fuel ratio correction thresholds. If the engine is operating in the second mode, the air fuel ratio correction data is compared to a second set of predetermined air fuel ratio correction thresholds and a second failure signal is generated based on the comparison between the air fuel ratio correction data and the second set of predetermined air fuel ratio correction thresholds. The engine is controlled based on the first and second failure signals.