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:
Feb. 19, 2008
Filed:
Jun. 20, 2006
Isao Chiba, Saitama, JP;
Ryuji Matsukado, Saitama, JP;
Ryuta Matsui, Saitama, JP;
Yoshinori Ishihara, Saitama, JP;
Isao Kaneko, Saitama, JP;
Isao Chiba, Saitama, JP;
Ryuji Matsukado, Saitama, JP;
Ryuta Matsui, Saitama, JP;
Yoshinori Ishihara, Saitama, JP;
Isao Kaneko, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A control system for an internal combustion engine that executes post injection, which is capable of accurately estimating the state of dilution of engine oil, thereby properly controlling the amount of oil dilution such that it does not become too large. In an internal combustion engine having an injector that injects fuel into a combustion chamber, post injection is executed in which fuel is injected from the injector during the expansion stroke or the exhaust stroke of the engine, based on a detected operating condition of the engine. The amount of dilution of engine oil diluted with fuel injected by post injection is calculated. The amount of fuel evaporated from the engine oil is calculated. A state of dilution of the engine oil is estimated based on the calculated engine dilution amount and the calculated fuel evaporation amount.