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:
Oct. 10, 2000
Filed:
Nov. 09, 1999
Makoto Yamakado, Tsuchiura, JP;
Yoshio Okamoto, Minori-machi, JP;
Nobukatsu Arai, Ushiku, JP;
Yuzo Kadomukai, Ishioka, JP;
Yoshiyuki Tanabe, Hitachinaka, JP;
Yasunaga Hamada, Hitachinaka, JP;
Yasuo Namaizawa, Kashima, JP;
Hiromasa Kubo, Yokohama, JP;
Kenji Tabuchi, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Car Engineering Co., Ltd., Ibaraki, JP;
Abstract
In an electromagnetic fuel injection valve for injecting fuel by opening/closing a fuel flowing path, including a valve seat, a valve element for opening/closing the fuel flowing path formed between the valve seat and the valve element, and a drive unit having at least one coil, for driving the valve element. The drive unit includes a first magnetomotive force generating device using the at least one coil and a second magnetomotive force generating device, the first magnetomotive force generating device and the second magnetomotive force generating device being composed so that the first magnetomotive force generating device generates and raises magnetomotive force at a larger rate of change in time in comparison with the second magnetomotive force generating device. A valve opening hold state is held by the second magnetomotive force generating device which uses a smaller current flow in comparison with the first magnetomotive force generating device.