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:
Jan. 16, 2007
Filed:
Oct. 31, 2002
Masahiro Tsuchiya, Tsuchiura, JP;
Tosuke Hirata, Ami, JP;
Yoshio Okamoto, Minori, JP;
Tohru Ishikawa, Kitaibaraki, JP;
Noriyuki Maekawa, Chiyoda, JP;
Yoshiyuki Tanabe, Hitachinaka, JP;
Atsushi Sekine, Hitachinaka, JP;
Yuzo Kadomukai, Ishioka, JP;
Makoto Yamakado, Tsuchiura, JP;
Motoyuki Abe, Chiyoda, JP;
Masahiro Tsuchiya, Tsuchiura, JP;
Tosuke Hirata, Ami, JP;
Yoshio Okamoto, Minori, JP;
Tohru Ishikawa, Kitaibaraki, JP;
Noriyuki Maekawa, Chiyoda, JP;
Yoshiyuki Tanabe, Hitachinaka, JP;
Atsushi Sekine, Hitachinaka, JP;
Yuzo Kadomukai, Ishioka, JP;
Makoto Yamakado, Tsuchiura, JP;
Motoyuki Abe, Chiyoda, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fuel-injection valve includes a fuel-injection hole, a valve element and a valve seat for opening and closing the fuel-injection hole, a force-applying member for applying force to the valve element in a direction of motion of the valve element, and a drive unit for applying force to the valve element in the direction opposite to that of the force applied by the force-applying member; wherein a secondary oscillation system, which interacts with a primary oscillation system including the valve element and the force-applying member, is added to the primary oscillation system, and the phase angle of force applied to the primary oscillation system by the secondary oscillation system is also staggered from that of force applied to the primary oscillation system, which is other than the force applied to the primary oscillation system by the secondary oscillation system, whereby the bouncing of the valve element during opening and closing of the valve is reduced, which in turn makes it possible to achieve very accurate fuel-injection control.