Fuel injection valve

Patent metadata

Field	Value
Publication number	US-10001101-B2
Application number	US-201414780671-A
Country	US
Kind code	B2
Filing date	Mar 28, 2014
Priority date	Apr 2, 2013
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

In a fuel injection valve having a nozzle hole plate wherein a nozzle hole is formed, the nozzle hole is formed with a flow path cross-section having an oval shape that has long axes and short axes, and the nozzle hole is formed having a tapered shape in which a flow path sectional area becomes larger from an entry-side open end portion toward an exit-side open end portion. The nozzle hole is formed such that a second angle that is an intersecting angle of opposing nozzle hole inner wall surface portions in an oblique section along the short axes of the entry-side open end portion and the exit-side open end portion, is greater than a first angle that is an intersecting angle of opposing nozzle hole inner wall surface portions in a longitudinal section along the long axes of the entry-side open end portion and the exit-side open end portion.

First claim

The invention claimed is:

1. A fuel injection valve comprising:
a valve body that includes a valve hole;
a valve element provided in the valve body so as to open and close the valve hole; and
a nozzle hole plate provided in the valve body so as to cover the valve hole,
wherein:
a nozzle hole that extends through in a plate thickness direction is formed in the nozzle hole plate,
a flow path cross-section of the nozzle hole is formed such that, in a plan view with respect to the nozzle hole plate, an entry-side open end portion of the nozzle hole that is positioned on a valve body side is formed in an oval shape having a long axis and a short axis, and
the nozzle hole is formed such that a second angle that is an intersecting angle of opposing nozzle hole inner wall surface portions in a cross-section along the short axis of the entry-side open end portion is greater than a first angle that is an intersecting angle of opposing nozzle hole inner wall surface portions in a cross-section along the long axis of the entry-side open end portion.

2. The fuel injection valve according to claim 1 , wherein
the flow path cross-section of the nozzle hole is formed in a tapered shape such that a flow path sectional area becomes larger from the entry-side open end portion positioned on the valve body side toward an exit-side open end portion positioned on an opposite side from the valve body.

3. The fuel injection valve according to claim 1 , wherein
a center of an exit-side open end portion of the nozzle hole is formed positioned farther toward an outer edge portion side of the nozzle hole plate than a center of the entry-side open end portion.

4. The fuel injection valve according to claim 1 , wherein
the nozzle hole is formed such that the center of an exit-side open end portion and the center of the entry-side open end portion do not overlap with each other in an axial view of the nozzle hole.

5. The fuel injection valve according to claim 1 , wherein
the nozzle hole is formed such that an outside angle that is an intersecting angle of an axis of the nozzle hole and the nozzle hole inner wall surface portion positioned on an outer edge portion side of the nozzle hole plate is larger than an inside angle that is an intersecting angle of the axis of the nozzle hole and the nozzle hole inner wall surface portion positioned on a center side of the nozzle hole plate, in a cross-section along the long axis of the entry-side open end portion.

6. The fuel injection valve according to claim 1 , wherein
the nozzle hole is formed such that the long axis of the entry-side open end portion extends toward a center of the valve hole.

7. The fuel injection valve according to claim 1 , wherein
the nozzle hole is formed such that the entry-side open end portion is adjacent to an edge portion of the valve hole.

8. The fuel injection valve according to claim 1 , wherein
a recessed portion that surrounds a periphery of the valve hole is formed in a portion of the nozzle hole plate that faces the valve body.

9. A fuel injection valve comprising:
a valve body that includes a valve hole;
a valve element provided in the-valve body so as to open and close the valve hole; and
a nozzle hole plate provided in the valve body so as to cover the valve hole,
wherein:
a nozzle hole that extends through in a plate thickness direction is formed in the nozzle hole plate,
a flow path cross-section of the nozzle hole being formed such that an entry-side open end portion that is positioned on a valve body side is formed in an oval shape having a long axis and a short axis, in a plan view with respect to the nozzle hole plate,
the nozzle hole is formed such that a second angle that is an intersecting angle of opposing nozzle hole inner wall surface portions in a cross-section along the short axis of the entry-side open end portion is greater than a first angle that is an intersecting angle of opposing nozzle hole inner wall surface portions in a cross-section along the long axis of the entry-side open end portion, and
a recessed portion that surrounds a periphery of the valve hole is formed in a portion of the nozzle hole plate that faces the valve body.

10. The fuel injection valve according to claim 9 , wherein
the flow path cross-section of the nozzle hole is formed in a tapered shape such that a flow path sectional area becomes larger from the entry-side open end portion positioned on the valve body side toward an exit-side open end portion positioned on an opposite side from the valve body side.

11. The fuel injection valve according to claim 9 , wherein
a center of an exit-side open end portion of the nozzle hole is formed positioned farther toward an outer edge portion side of the nozzle hole plate than a center of the entry-side open end portion.

12. The fuel injection valve according to claim 9 , wherein
the nozzle hole is formed such that the center of an exit-side open end portion and the center of the entry-side open end portion do not overlap with each other in an axial view of the nozzle hole.

13. The fuel injection valve according to claim 9 , wherein
the nozzle hole is formed such that an outside angle that is an intersecting angle of an axis of the nozzle hole and the nozzle hole inner wall surface portion positioned on an outer edge portion side of the nozzle hole plate is larger than an inside angle that is an intersecting angle of the axis of the nozzle hole and the nozzle hole inner wall surface portion positioned on a center side of the nozzle hole plate, in a cross-section along the long axis of the entry-side open end portion.

14. The fuel injection valve according to claim 9 , wherein
the nozzle hole is formed such that the long axis of the entry-side open end portion extends toward a center of the valve hole.

15. The fuel injection valve according to claim 9 , wherein
the nozzle hole is formed such that the entry-side open end portion is adjacent to an edge portion of the valve hole.

16. A fuel injection valve comprising:
a valve body that includes a valve hole;
a valve element provided in the valve body so as to open and close the valve hole; and
a nozzle hole plate provided in the valve body so as to cover the valve hole,
wherein:
a nozzle hole that extends through in a plate thickness direction is formed in the nozzle hole plate,
a flow path cross-section of the nozzle hole being formed such that, in a plan view with respect to the nozzle hole plate, an entry-side open end portion that is positioned on a valve body side is formed in an oval shape having a long axis and a short axis and an exit-side open end portion that is positioned on an opposite side from the valve body side is formed having a long axis and a short axis, and
the nozzle hole is formed such that a second angle that is an intersecting angle of opposing nozzle hole inner wall surface portions in a cross-section along the short axes of the entry-side open end portion and exit-side open end portion is greater than a first angle that is an intersecting angle of opposing nozzle hole inner wall surface portions in a cross-section along the long axes of the entry-side open end portion and exit-side open end portion.

Assignees

• Sugiyama Natsuki
• Yoshida Mitsutaka
• Satou Akio
• Asano Masahiko
• Kinoshita Yasuo
• Nakayama Masao
• Kidera Kenji
• Setodoi Masaru
• Ito Hirokazu
• Sakai Hiroyuki
• Toyota Motor Co Ltd

Inventors

• Sugiyama Natsuki
• Yoshida Mitsutaka
• Satou Akio
• Asano Masahiko
• Kinoshita Yasuo
• Nakayama Masao
• Kidera Kenji
• Setodoi Masaru
• Ito Hirokazu
• Sakai Hiroyuki

Classifications

• F02M61/184

  Discharge orifices having non circular sections · CPC title

• F02M63/008

  Hollow valve members, e.g. members internally guided · CPC title

• F02M61/1833 Primary

  Discharge orifices having changing cross sections, e.g. being divergent · CPC title

• F02M61/1846

  Dimensional characteristics of discharge orifices · CPC title

• F02M61/1853

  Orifice plates · CPC title