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:
May. 05, 2015
Filed:
Sep. 10, 2013
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Naozumi Yoshimura, Atsugi, JP;
Atsushi Watanabe, Atsugi, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
In a valve timing control apparatus employing two lock pins located in a vane rotor and two lock holes located in a sprocket so as to permit movement of the lock pins into and out of engagement with the respective holes, a guide mechanism is provided for guiding movement of the vane rotor relative to the sprocket toward a prescribed lock position. The guide mechanism includes a guide pin and a guide hole configured to permit movement of the guide pin into and out of engagement with the guide hole. Hydraulic pressure, used for retreating-movement of the lock pins out of engagement, is supplied through a first branch passage branching from an unlock passage configured to communicate with a pump discharge passage. Hydraulic pressure, used for retreating-movement of the guide pin out of engagement, is supplied through a second branch passage branching from the same unlock passage.