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:
Oct. 25, 2011
Filed:
Jan. 21, 2008
Yuuichi Kato, Susono, JP;
Hiroki Ichinose, Fujinomiya, JP;
Nao Murase, Susono, JP;
Rie Osaki, Anjyo, JP;
Yuuichi Kato, Susono, JP;
Hiroki Ichinose, Fujinomiya, JP;
Nao Murase, Susono, JP;
Rie Osaki, Anjyo, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Nippon Soken, Inc, Aichi, JP;
Abstract
A device for controlling an internal combustion engine which uses, as the fuel, a heavy fuel, a light fuel, an alcohol fuel and a mixture thereof, comprising a heavy fuel/light fuel ratio detectorcapable of detecting the ratio of the heavy fuel and the light fuel, and an air-fuel ratio detectorfor detecting the air-fuel ratio of the exhaust gas, wherein the amount of fuel injection is calculated based on the heavy fuel/light fuel ratio detector so that the air-fuel ratio becomes a target air-fuel ratio. The heavy fuel/light fuel ratio detector is diagnosed if it is in an abnormal condition based on a difference between the target air-fuel ratio and the air-fuel ratio detected by the air-fuel ratio detector while the engine temperature is in a particular temperature region. The heavy fuel/light fuel ratio detector can be correctly diagnosed if it is in an abnormal condition even when an alcohol-mixed fuel is used.