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. 29, 1987
Filed:
Nov. 03, 1986
Takeshi Katayama, Kariya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
An air-to-fuel ratio of an air-fuel mixture in an engine is controlled via a fuel supply system. The fuel supply system operates in accordance with a signal representing a desired air-to-fuel ratio of an air-fuel mixture in the engine. When the fuel supply system operates normally, an actual air-to-fuel ratio of the air-fuel mixture can be essentially equal to the desired air-to-fuel ratio. An actual air-to-fuel ratio of the air-fuel mixture is detected. A malfunction of the fuel supply system is detected in accordance with the detected actual air-to-fuel ratio and the desired air-to-fuel ratio. In the case where the fuel supply system includes fuel injection valves and an air-to-fuel ratio sensor is disposed in an exhaust passage of the engine, a malfunction of at least one of the fuel injection valves may be detected in accordance with whether or not an output signal from the air-to-fuel ratio sensor changes periodically in synchronism with operation cycles of the engine or revolution of the engine.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile