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:
Jul. 25, 2017
Filed:
Jan. 24, 2014
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Ayumu Hatanaka, Tokyo, JP;
Ryo Kusakabe, Tokyo, JP;
Motoyuki Abe, Tokyo, JP;
Toshihiro Aono, Tokyo, JP;
Teppei Hirotsu, Tokyo, JP;
Hideyuki Sakamoto, Hitachinaka, JP;
Takao Fukuda, Hitachinaka, JP;
Hideharu Ehara, Hitachinaka, JP;
Masahiro Toyohara, Hitachinaka, JP;
Akira Nishioka, Tokyo, JP;
Toshio Hori, Hitachinaka, JP;
Kiyoshi Aiki, Tokyo, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
An object of this disclosure is to provide a fuel injection device that can reliably detect an operation timing of a valve body, that is, a valve opening timing with high accuracy. The current of an electromagnetic valve reaches Iat time t, an FETand an FETare turned on, and a battery voltage VB is applied to the electromagnetic valve until time tis reached. The amount of displacement of the valve body reaches a target amount of control lift at time tbetween time tand time t, that is, a movable corecomes into contact with a fixed core. The detection of the valve opening timing is performed during the period from time tto time t