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:
Dec. 16, 2008
Filed:
Jun. 10, 2005
Akira Akabane, Miyagi, JP;
Akira Akabane, Miyagi, JP;
Keihin Corporation, Tokyo, JP;
Abstract
A fuel injection valve is provided in which a funnel-shaped fuel collecting depression () is provided between a valve seat () and an outlet hole () of a valve seat member (), the depression () collecting fuel that has passed through the valve seat () and guiding it to the outlet hole (), and a flat fuel diffusion chamber () for radially outwardly diffusing fuel that has passed through the outlet hole () and guiding it to a plurality of fuel injection holes () is provided between opposing faces of the valve seat member () and an injector plate (), an inner peripheral face (A) of the outlet hole () being formed along a curved face on the inner peripheral side of a virtual torus (T) so that the inner peripheral face (A) is continuous with the base of the fuel collecting depression () and the roof of the fuel diffusion chamber (). This prevents eddies from being generated when fuel is reversed at the outlet hole of the valve seat member, thus enabling pressure loss of the fuel to be reduced, reduction in the amount of fuel injected to be suppressed, atomization of injected fuel to be promoted, and a spray form to be stabilized.