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:
Dec. 19, 2006
Filed:
May. 20, 2005
Atsushi Watanabe, Mito, JP;
Isao Hayase, Tsuchiura, JP;
Seiji Suga, Kiyokawa, JP;
Takanori Sawada, Atsugi, JP;
Tomoya Tsukada, Ebina, JP;
Atsushi Watanabe, Mito, JP;
Isao Hayase, Tsuchiura, JP;
Seiji Suga, Kiyokawa, JP;
Takanori Sawada, Atsugi, JP;
Tomoya Tsukada, Ebina, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The invention intends to improve a response by utilizing a rotational variable torque of a cam shaft. Communication paths respectively communicating an advance hydraulic chamber and a retard hydraulic chamber provided in a second rotary member and a hydraulic connecting passage are provided so as to be communicated, at a time when a control member intending to improve a response by moving a phase angle control slider in an axial direction or a rotational direction in correspondence to an operating state such as an advance, a retard or the like so as to intermittently communicate an advance chamber communication path and a retard chamber communication path with a hydraulic chamber connecting groove only in a section in which a cam shaft variable torque in an operating direction is applied, is controlled in a rotating region, and a relative rotation of a third rotary member and the second rotary member stops.