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:
Jun. 11, 2013
Filed:
Aug. 08, 2008
Toru Fukami, Kawasaki, JP;
Tsuyoshi Arinaga, Yamato, JP;
Shinichi Takemura, Fujisawa, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A variable valve device includes: a drive shaft () that rotates in synchronization with a crankshaft of an engine; a drive cam () provided on the drive shaft (); a rocker cam () pivotally supported on the drive shaft (); an engine valve that is driven to open and close by the rocker cam (); a rocker shaft () disposed parallel to the drive shaft (); a rocker arm () pivotally supported on the rocker shaft (); a first link () that links the rocker arm () and the drive cam (); a second link () that links the rocker arm () and the rocker cam (); and a rocker shaft position modifying means () for modifying an operating angle and a lift of the engine valve by varying a position of the rocker shaft () relative to the drive shaft (), wherein the position of the rocker shaft () relative to the drive shaft () is modified such that within a predetermined operating angle range of the engine valve, a variation of a maximum lift of the engine valve accompanying control of the operating angle is suppressed in comparison with a case in which the operating angle is modified outside of the predetermined operating angle range.