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. 16, 2012
Filed:
Apr. 30, 2008
Hidenori Moriya, Susono, JP;
Hidenori Moriya, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
In an internal combustion engine control device having an air-fuel ratio control device that controls the fuel injection amount so that the air-fuel ratio of exhaust gas of an internal combustion engine approaches a target stoichiometric air-fuel ratio, the control device further includes a device that calculates the lower calorific value of fuel, and a device that sets the target stoichiometric air-fuel ratio from the calculated lower calorific value based on a known relationship between the lower calorific value and the stoichiometric air-fuel ratio. It becomes possible to perform the air-fuel ratio control according to the fuel property by utilizing the relationship between the calorific value and the stoichiometric air-fuel ratio.