Component for flow rate control device, and fuel injection valve

Patent metadata

Field	Value
Publication number	US-11313336-B2
Application number	US-201917046847-A
Country	US
Kind code	B2
Filing date	Feb 13, 2019
Priority date	Apr 20, 2018
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

An object of the present invention is to provide a fluid control device with an improved effect of suppressing blowhole generation. Therefore, a component for a flow rate control device of the present invention includes: a first component 140 (A); a second component 107 (B) fixed to the first component by a press-fitting portion 802; a butt-welded portion 803 connecting the first component and the second component; and a first gap 1001 and a second gap 1002 formed between mutually opposing surfaces of the first component and the second component. The first gap is provided on a side of the press-fitting portion with respect to the second gap between the press-fitting portion and the butt-welded portion, and is formed in a direction intersecting a press-fitting direction. The second gap is provided on a side of the butt-welded portion with respect to the first gap between the press-fitting portion and the welded portion, and is formed in a direction intersecting the first gap.

First claim

The invention claimed is:

1. A component for a flow rate control device comprising:
a first component;
a second component fixed to the first component by a press-fitting portion;
a welded portion that connects the first component and the second component; and
a first gap and a second gap formed between mutually opposing surfaces of the first component and the second component,
wherein the first gap is provided on a side of the press-fitting portion with respect to the second gap between the press-fitting portion and the welded portion, and is formed in a direction intersecting a press-fitting direction, and
the second gap is provided on a side of the welded portion with respect to the first gap between the press fitting portion and the welded portion, and is formed in a direction intersecting the first gap,
wherein the welded portion is a butt-welded portion having a butt-joint configuration, and the first gap is connected to the press-fitting portion, and the second gap is connected to the butt-welded portion,
wherein a volume of the first gap is configured to be larger than a volume of the second gap,
wherein the first gap extends in a radial direction, and the second gap extends in a vertical direction perpendicular to the radial direction.

2. The component for a flow rate control device according to claim 1 , wherein
the first component includes a first-component-side stepped portion having a large-diameter inner peripheral surface and a small-diameter inner peripheral surface on an inner peripheral side,
the second component includes a second-component-side stepped portion having a large-diameter outer peripheral surface, a medium-diameter outer peripheral surface, and a small-diameter outer peripheral surface on an outer peripheral side,
the press-fitting portion is formed between the small-diameter inner peripheral surface of the first component and the small-diameter outer peripheral surface of the second component, and
the butt-welded portion is formed between a first component end surface, formed between an outer peripheral surface and the large-diameter inner peripheral surface of the first component, and a second component first step surface formed between the large-diameter outer peripheral surface and the medium-diameter outer peripheral surface of the second component.

3. The component for a flow rate control device according to claim 2 , wherein
the first gap is formed between a first component step surface, formed between the large-diameter inner peripheral surface and the small-diameter inner peripheral surface of the first component, and a second component second step surface formed between the medium-diameter outer peripheral surface and the small-diameter outer peripheral surface of the second component, and
the second gap is formed between the large-diameter inner peripheral surface of the first component and the medium-diameter outer peripheral surface of the second component.

4. The component for a flow rate control device according to claim 1 , wherein a minimum interval of the first gap in the press-fitting direction is configured to be larger than a minimum interval of the second gap in the direction intersecting the press-fitting direction.

5. The component for a flow rate control device according to claim 1 , wherein a deepest portion in a welding depth direction of the butt-welded portion is configured to be located on a side where a welding depth becomes deeper with respect to the second gap.

6. The component for a flow rate control device according to claim 1 , wherein the first gap is configured to have an elongated shape such that a length in the direction intersecting the press-fitting direction is longer than an interval formed between the mutually opposing surfaces of the first component and the second component.

7. The component for a flow rate control device according to claim 1 , wherein the second gap is configured to have an elongated shape such that a length in the press-fitting direction is longer than an interval formed between the mutually opposing surfaces of the first component and the second component.

8. A fuel injection valve comprising:
a fixed core;
a movable core and a valve body driven by a magnetic attraction force of the fixed core;
a fuel injection hole for injecting fuel when the valve body is separated from a valve seat; and
an adapter connected to the fixed core to form a fuel supply port,
wherein the fixed core and the adapter are configured using the component for a flow rate control device according to claim 1 such that the fixed core is provided as the second component and the adapter is provided as the first component.

9. The component for a flow rate control device according to claim 1 , wherein an angle formed by a first tangent line tangent with an upper surface of the butt-welded portion, and a second tangent line tangent to the vertical direction, is 90 degrees or larger.

Assignees

• Hitachi Automotive Systems Ltd
• Hitachi Astemo Ltd

Inventors

• Miyake Takao
• Namaizawa Yasuo
• Furuyama Takumasa

Classifications

• F02M2200/8061

  involving press-fit, i.e. interference or friction fit · CPC title

• F02M2200/80

  Fuel injection apparatus manufacture, repair or assembly · CPC title

• F02M51/061 Primary

  using electromagnetic operating means · CPC title

• F02M2200/8084

  involving welding or soldering · CPC title

• F02M61/1873

  Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal · CPC title