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. 16, 2014
Filed:
Sep. 07, 2010
Hiroyuki Kato, Koza-gun, JP;
Yoshinori Ichinosawa, Atsugi, JP;
Yasushi Watanabe, Aiko-gun, JP;
Hideaki Ohnishi, Atsugi, JP;
Hiroyuki Kato, Koza-gun, JP;
Yoshinori Ichinosawa, Atsugi, JP;
Yasushi Watanabe, Aiko-gun, JP;
Hideaki Ohnishi, Atsugi, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
In a hydraulic pressure circuit including an introduction section through which oil is introduced, a main passage section installed at a downstream side of the introduction section to be communicated with a supply section through which oil is supplied to each of slide sections of an internal combustion engine, a branch passage branched from the main passage section to supply oil to a hydraulic pressure actuator, and a control valve having a valve body which is moved in accordance with a pressure of an upstream side thereof, and a variable capacitance pump configured to drain oil to the introduction section, the variable capacitance pump is configured to vary a drained flow quantity in accordance with the drained pressure of oil and a pressure under which the oil drained flow quantity is started to be varied is higher than a pressure under which the valve body is started to move.