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:
Jan. 08, 2008
Filed:
Aug. 05, 2005
Hiroshi Tagami, Saitama-ken, JP;
Yuji Yasui, Saitama-ken, JP;
Mitsunobu Saito, Saitama-ken, JP;
Kosuke Higashitani, Saitama-ken, JP;
Hiroshi Tagami, Saitama-ken, JP;
Yuji Yasui, Saitama-ken, JP;
Mitsunobu Saito, Saitama-ken, JP;
Kosuke Higashitani, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A cam phase control system for an internal combustion engine, which is capable of suppressing deviation of the cam phase which is caused by a sudden change in the engine speed due to the structure of a variable cam phase mechanism, thereby securing excellent controllability and high control accuracy. The coma phase control system of the engine comprise an ECU and an electromagnetic variable cam phase mechanism. The ECU calculates an SLD control input for causing the cam phase to converge to a target cam phase by equations (1) to (6), calculates a gain-adjusted value by modulating the SLD control input by equations (20) to (25), calculates a correction value according to the engine speed NE, and calculates a control input for controlling the variable cam phase mechanism by correcting the gain-adjusted value by the correction value.