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:
Aug. 13, 2013
Filed:
Dec. 20, 2010
Hiroyuki Kato, Koza-gun, JP;
Hiroyuki Kato, Koza-gun, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
In a hydraulic system equipped with a main flow passage for feeding oil to each of lubricated engine parts and a branch passage branched from the main flow passage, a control valve apparatus is provided for adjusting a flow rate of the oil flowing through a portion of the main flow passage downstream of the branched point. The control valve apparatus is configured to control the flow rate to a large flow-rate side of a variable flow-rate range, until a hydraulic pressure of the oil flowing through the main flow passage becomes greater than or equal to a predetermined pressure value after the engine has been started from its stopped state. The control valve apparatus is further configured to control the flow rate to a small flow-rate side of the variable flow-rate range, when the predetermined pressure value has been reached.