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. 16, 2010
Filed:
Oct. 14, 2008
Yuji Yasui, Saitama-ken, JP;
Mitsunobu Saito, Saitama-ken, JP;
Hiroshi Tagami, Saitama-ken, JP;
Kosuke Higashitani, Saitama-ken, JP;
Masahiro Sato, Saitama-ken, JP;
Yuji Yasui, Saitama-ken, JP;
Mitsunobu Saito, Saitama-ken, JP;
Hiroshi Tagami, Saitama-ken, JP;
Kosuke Higashitani, Saitama-ken, JP;
Masahiro Sato, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A control system for an internal combustion engine, which is capable of enhancing the accuracy of fuel control and ignition timing control even when there is a possibility that the reliability of a calculated intake air amount lowers, and enables reduction of manufacturing costs. An ECU of the control system calculates a first estimated intake air amount according to a valve lift, a cam phase, and a compression ratio, calculates a second estimated intake air amount according to the flow rate of air detected by an air flow sensor. The ECU determines a fuel injection amount according to the first estimated intake air amount when an estimated flow rate Gin_vt calculated based on an engine speed, the valve lift, the cam phase, and the compression ratio is within the range of Gin_vt≦Gin, and according to the second estimated intake air amount when GinGin_vt.