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:
Apr. 04, 2006
Filed:
Jan. 26, 2000
Kiyotaka Ogura, Hitachinaka, JP;
Atsushi Sekine, Hitachinaka, JP;
Eiichi Kubota, Niihari-gun, JP;
Masafumi Nakano, Hitachi, JP;
Keiichi Uraki, Hitachinaka, JP;
Noriyuki Maekawa, Niihari-gun, JP;
Mizuho Yokoyama, Hitachinaka, JP;
Yoshiyuki Tanabe, Hitachinaka, JP;
Hiromasa Kubo, Yokohama, JP;
Tooru Ishikawa, Kitaibaraki, JP;
Kiyotaka Ogura, Hitachinaka, JP;
Atsushi Sekine, Hitachinaka, JP;
Eiichi Kubota, Niihari-gun, JP;
Masafumi Nakano, Hitachi, JP;
Keiichi Uraki, Hitachinaka, JP;
Noriyuki Maekawa, Niihari-gun, JP;
Mizuho Yokoyama, Hitachinaka, JP;
Yoshiyuki Tanabe, Hitachinaka, JP;
Hiromasa Kubo, Yokohama, JP;
Tooru Ishikawa, Kitaibaraki, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Car Engineering Co., Ltd., Hitachinaka, JP;
Abstract
A fuel swirler positioned upstream of an injection orifice is disposed at the tip of a nozzle body in a fuel injector, in which the fixed core and the nozzle body are coupled to each other via a non-magnetic cylindrical seal ring press-fitted and welded to the outer circumference of one end on the nozzle body side of the fixed core and the inner circumference of one end of the nozzle body. The inner circumference of the fuel swirler and the inner circumference of the seal ring function serve as a guide for slidably guiding a stroke movement of the needle. The fuel swirler is held between the receiving surface of the nozzle body and the orifice plate, thus defining an annular fuel passage between the outer circumference of the fuel swirler and the inner circumference of the nozzle body, so that fuel flows into a passage groove formed at the lower end surface of the fuel swirler via the annular fuel passage. A mass movable in an axial direction independently of the needle is interposed between the return spring and the needle, and a plate spring is interposed between the mass and the needle.