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, 2002
Filed:
Aug. 25, 2000
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;
Other;
Abstract
An electromagnetic fuel injection valve in an engine injects fuel by opening/closing a fuel flowing path with a valve element. A controller controls opening/closing of the fuel flowing path and changes magnetic force generated by a control coil driving the valve element so that the magnetic force is less during a valve open state-holding period than at an initial valve-opening time. The controller detects the voltage of a battery and applies the voltage fed from the battery to the control coil, while changing a time interval (Tc), for which current is passed through the control coil, based on the detected voltage, in order to change the magnetic force, without raising the voltage from the battery. The controller also detects increase/decrease of a pressing force on the valve element caused by fuel pressure and changes the time interval (Tc) accordingly.