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:
Feb. 26, 2008
Filed:
Jan. 31, 2006
Masanori Mifuji, Hitachinaka, JP;
Tohru Ishikawa, Kitaibaraki, JP;
Atsushi Sekine, Hitachinaka, JP;
Yoshio Okamoto, Higashiibaraki, JP;
Masanori Mifuji, Hitachinaka, JP;
Tohru Ishikawa, Kitaibaraki, JP;
Atsushi Sekine, Hitachinaka, JP;
Yoshio Okamoto, Higashiibaraki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fuel injector has a plunger for opening/closing a fuel path to control the amount of fuel to be injected; a seat portion for the plunger; and a plurality of nozzle holes for injecting fuel passed through between the plunger and the seat portion, A nozzle plate is provided with the seat portion, and a taper-fuel inlet hole has a diameter that gradually reduces from the seat toward its outlet, An orifice plate is arranged downstream from the taper-fuel inlet hole, and is provided with a concave portion opposite to the nozzle plate, with a plurality of nozzle holes being formed concentrically at a bottom of the concave portion. Each nozzle hole has an inclined angle in the direction of the plate thickness within the concave area.