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:
Sep. 22, 2009
Filed:
Sep. 27, 2005
Kanako Shimojo, Saitama-ken, JP;
Yuji Yasui, Saitama-ken, JP;
Kanako Shimojo, Saitama-ken, JP;
Yuji Yasui, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
To provide a control system for an internal combustion engine, which is capable of attaining both the securing of excellent drivability and the reduction of impact occurring when a movable part abuts against a restriction part at the same time. The control systemincludes a variable valve lift mechanismthat changes a valve lift Liftin, and includes a restriction partfor having a movable partabut thereagainst for restricting the valve lift Liftin such that it does not exceed a predetermined limit lift Liftin_L, and a variable intake air amount mechanismthat changes the intake air amount. The control system calculates a control input ULiftin for control of the variable valve lift mechanism, with a predetermined control algorithm including a disturbance suppression parameter POLE_lf (step), such that the valve lift Liftin follows up the target valve lift Liftin_cmd. When a determination that the movable parthas abutted against the restriction partis made, the control system sets the disturbance suppression parameter POLE_lf such that the degree of suppression of the disturbance thereby becomes smaller than before the determination (step).