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:
May. 18, 2010
Filed:
May. 10, 2005
Takahide Koshimizu, Toyota, JP;
Fuminori Hosoda, Toyota, JP;
Koichi Shimizu, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
An engine variable valve actuation mechanism that substantially equally adjusts the valve lift amount in each cylinder. The mechanism includes variable valve lift mechanisms respectively arranged in association with the engine cylinders. A control shaft extends through the variable valve lift mechanisms. An actuator moves the control shaft in the axial direction and drives the variable valve lift mechanisms. Collars are arranged alternately with the variable valve lift mechanisms. Each collar includes a cylindrical sleeve and flanges formed integrally with the sleeve. The flanges directly or indirectly contact the end faces of adjacent variable valve lift mechanisms. This determines the positions of the variable valve lift mechanisms with respect to one another in the axial direction.