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. 14, 2010
Filed:
Jun. 02, 2008
Makoto Nakamura, Isehara, JP;
Yoshinori Ichinosawa, Atsugi, JP;
Tomoya Tsukada, Ebina, JP;
Seinosuke Hara, Atsugi, JP;
Tomoyuki Murakami, Chigasaki, JP;
Makoto Nakamura, Isehara, JP;
Yoshinori Ichinosawa, Atsugi, JP;
Tomoya Tsukada, Ebina, JP;
Seinosuke Hara, Atsugi, JP;
Tomoyuki Murakami, Chigasaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A variable valve actuating apparatus for an internal combustion engine includes an intake valve operating angle varying mechanism, and an intake valve timing varying mechanism. The intake valve timing varying mechanism includes a housing rotating in synchronization with a crankshaft, and a vane member coupled to a drive shaft for intake valve operation, and movably mounted in the housing. The vane member includes a vane defining first and second fluid pressure chambers on first and second opposite sides of the vane. A hydraulic circuit is arranged to rotate the vane member relative to the housing by supply and return of a brake fluid to and from the first and second fluid pressure chambers so as to change the intake valve maximum lift phase. Coil springs are arranged to bias the vane member relative to the housing in a direction to retard the intake valve maximum lift phase.