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. 11, 2000
Filed:
Dec. 19, 1997
Kiyonari Honda, Ichinomiya, JP;
Yutaka Niwa, Nagoya, JP;
Denso Corporation, Kariya, JP;
Abstract
The present invention aims to improve evenness of atomizing of fuel in a fuel injection valve. An inner bottom surface of a fuel injection chamber 16 opened or closed by a needle valve 12 is designed in semi-spherical shape, and an injection nozzle 17 is formed obliquely on its bottom surface. To reduce deviation of flow velocity distribution in axial direction of said injection nozzle 17 of the fuel entering said injection nozzle 17, position of the injection nozzle 17 is deviated to a direction rotated by 90.degree. from tilting direction of the injection nozzle 17 toward swirling direction of the fuel with respect to the center of the bottom surface of the fuel injection chamber 16. This is because, in case the injection nozzle 17 is provided at the center of the bottom surface of the fuel injection chamber 16, axial flow velocity reaches minimum at 90.degree. and reaches maximum at 270.degree.. The deviation of the injection nozzle 17 is set in such range that no step is generated on a connection between inner peripheral surface of the fuel injection chamber and inlet of the injection nozzle 17. Further, total periphery of the inlet of the injection nozzle 17 is designed in R-shape (arcuate curved surface), and inner peripheral surface of the fuel injection chamber 16 is connected with the inlet of the injection nozzle 17 as a continuous smooth curved surface.