Fuel injection valve

Patent metadata

Field	Value
Publication number	US-9528481-B2
Application number	US-201514819037-A
Country	US
Kind code	B2
Filing date	Aug 5, 2015
Priority date	Aug 3, 2011
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

Fuel injection valve with conical valve seat surface that abuts a valve body to seal fuel, fuel injection orifices having an inlet opening formed on the valve seat surface, wherein fuel sprays injected from the plurality of fuel injection orifices include a first fuel spray constituted by a fuel spray injected from at least one fuel injection orifice and a second fuel spray constituted by a plurality of fuel sprays injected at an outer periphery of the first fuel spray, and a fuel injection orifice that injects the first fuel spray constituted with a plane that includes an orifice axis connecting a center of an inlet with a center of an outlet of the fuel injection orifice, parallel to a center axis of the fuel injection valve intersecting a plane, a conical apex that forms the valve seat surface to form an inclination angle that is larger than 0°.

First claim

The invention claimed is:

1. A fuel injection valve comprising:
a valve seat surface that abuts a valve body to seat fuel; and
a plurality of fuel injection orifices having an inlet opening formed on the valve seat surface,
wherein the plurality of fuel injection orifices include a first injection orifice and a plurality of second injection orifices,
orifice axes connecting a center of an inlet with a center of an outlet in the second injection orifices are symmetrically arranged with respect to a plane of symmetry including a center axis of the fuel injection valve,
a center of the inlet opening of the first injection orifice is separated without contacting the plane of symmetry, and
a plane that includes an orifice axis connecting a center of an inlet with a center of an outlet in one of the second injection orifices and is parallel to the center axis of the fuel injection valve intersects a plane including a straight line passing through the center of the inlet of the one second injection orifice and a conical apex that forms the valve seat surface as well as the center axis of the fuel injection valve to form an inclination angle that is larger than 0°.

2. The fuel injection valve according to claim 1 , wherein
a segment connecting a center of an inlet with a center of an outlet in the first injection orifice is separated without connecting the plane of symmetry.

3. The fuel injection valve according to claim 1 , wherein
a plane that includes an orifice axis connecting a center of an inlet with a center of an outlet in the first injection orifice and is parallel to the center axis of the fuel injection valve is parallel to the plane of symmetry.

4. The fuel injection valve according to claim 1 , wherein
a plurality of fuel sprays injected from the second injection orifices are injected at an outer periphery of a fuel spray injected from the first injection orifice.

5. The fuel injection valve according to claim 1 , wherein
a plurality of fuel sprays injected from the second injection orifices are injected along one virtual cone surface.

6. The fuel injection valve according to claim 5 , wherein
a plurality of fuel sprays injected from the second injection orifices are injected such that each spray injected from the second injection orifices is dispersed in a circumferential direction.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Yasukawa Yoshihito
• Abe Motoyuki
• Ehara Hideharu
• Ishikawa Tohru
• Ishii Eiji

Classifications

• F02M51/061 Primary

  using electromagnetic operating means · CPC title

• F02M61/182

  Discharge orifices being situated in different transversal planes with respect to valve member direction of movement · CPC title

• F02M61/1806

  characterised by the arrangement of discharge orifices, e.g. orientation or size · CPC title

• F02M61/1813 Primary

  Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with each other · CPC title

• F02M61/162

  Means to impart a whirling motion to fuel upstream or near discharging orifices · CPC title