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:
Jul. 22, 2008
Filed:
Mar. 08, 2006
Yoshihiko Yamada, Kanagawa, JP;
Yoshihiko Yamada, Kanagawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A variable valve apparatus for an internal combustion engine including a cylinder set comprising a plurality of cylinders. The variable valve apparatus includes: a control shaft adapted for rotation; a valve actuating mechanism provided for each cylinder of the cylinder set and adapted to vary a valve lift characteristic of an engine valve of the each cylinder of the cylinder set in accordance with a rotational position of the control shaft; and a valve lift adjusting mechanism provided for each cylinder of a first subset of the cylinder set and adapted to adjust the valve lift characteristic of the engine valve of the each cylinder of the first subset in accordance with a standard valve lift characteristic determined in accordance with the valve lift characteristic of the engine valve of each cylinder of a second subset of the cylinder set.