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:
Aug. 30, 2011
Filed:
Jan. 27, 2009
Makoto Nakamura, Isehara, JP;
Noriomi Hosaka, Hiratsuka, JP;
Mikihiro Kajiura, Inagi, JP;
Yoshihiko Yamada, Fujisawa, JP;
Seiji Tsuruta, Atsugi, JP;
Seinosuke Hara, Atsugi, JP;
Makoto Nakamura, Isehara, JP;
Noriomi Hosaka, Hiratsuka, JP;
Mikihiro Kajiura, Inagi, JP;
Yoshihiko Yamada, Fujisawa, JP;
Seiji Tsuruta, Atsugi, JP;
Seinosuke Hara, Atsugi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A variable valve actuation apparatus of an internal combustion engine has a multinodular-link motion converter, to vary at least a working angle. A position of rotation of a control shaft, variably adjusting the attitude of the motion converter, is set, so that, at a peak lift during a valve opening period, an angle γbetween an extension line of a line segment connecting a first fulcrum corresponding to a drive-eccentric-cam center and a second fulcrum provided on a rocker arm and a line segment connecting the second fulcrum and a third fulcrum provided on the rocker arm at a position different from the second fulcrum at a middle working-angle control mode is less than both an angle γbetween the two line segments at a minimum working-angle control mode and an angle γbetween the two line segments at a maximum working-angle control mode.