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:
Apr. 04, 2006
Filed:
Jul. 07, 2004
Koji Shiraishi, Saitama, JP;
Junya Watanabe, Saitama, JP;
Ranju Imao, Saitama, JP;
Takashi Tsutsumizaki, Saitama, JP;
Koji Shiraishi, Saitama, JP;
Junya Watanabe, Saitama, JP;
Ranju Imao, Saitama, JP;
Takashi Tsutsumizaki, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A variable compression ratio engine includes a control actuator which has a simple structure, seals well internally, and provides high reliability. In the variable compression ratio engine, a connecting rod is divided into at least two portions. A control rod is operatively connected to a juncture of the connecting rod. A support shaft position of the control rod is displaced. The control rod is operatively connected to a right cylinder rod of a piston-type double-acting hydraulic control cylinder. A piston section of the hydraulic control cylinder is configured to selectively move in accordance with displacement of the support shaft position of the control rod. A channel is used to connect two hydraulic chambers divided by the piston section. The channel is configured to selectively control the flow of hydraulic fluid from the right hydraulic chamber to the left hydraulic chamber, and vice versa.