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:
Jun. 13, 2006
Filed:
Oct. 27, 2003
Tsuneyasu Nohara, Kanagawa, JP;
Yoshiaki Tanaka, Kanagawa, JP;
Shinichi Takemura, Yokohama, JP;
Shunichi Aoyama, Kanagawa, JP;
Tsuneyasu Nohara, Kanagawa, JP;
Yoshiaki Tanaka, Kanagawa, JP;
Shinichi Takemura, Yokohama, JP;
Shunichi Aoyama, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A variable compression ratio system for an internal combustion engine, including a variable compression ratio mechanism for continuously varying a compression ratio of the engine, the variable compression ratio mechanism including a control shaft rotatably moveable to a rotational position corresponding to the compression ratio, a hydraulic actuator driving the control shaft to the rotational position depending on operating conditions of the engine, a hydraulic pressure source mechanically driven by the engine to produce a hydraulic pressure supplied to the hydraulic actuator, and a hydraulic control for variably controlling the hydraulic pressure supplied to the hydraulic actuator on the basis of the engine operating conditions.