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:
Sep. 24, 1996
Filed:
Jul. 18, 1994
Tomohiro Fujita, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
A system, capable of determining an engine abnormality, is disclosed. The engine includes a first regulator for controlling air fuel ratio and a second regulator for controlling the purging amount of fuel vapor into an air-intake passage from a fuel tank. The variance in the purging amount effects the air fuel ratio. An engine control unit computes a parameter value used to control the air fuel ratio based on a signal from a detector which detects the operational condition of the engine, and controls the first regulator with the computed parameter value to allow the operational condition of the engine to approach a requested condition. A determining apparatus determines that an abnormality has occurred in the engine when the parameter value computed by the control unit continuously deviates from a predetermined numerical range for a predetermined period of time. The determining apparatus also automatically adjusts the numerical range in accordance with a degree of influence of the variance in the purging amount on the air fuel ratio.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile