Electromagnetic valve mechanism and high-pressure fuel supply pump

Patent metadata

Field	Value
Publication number	US-12085074-B2
Application number	US-202017777682-A
Country	US
Kind code	B2
Filing date	Oct 30, 2020
Priority date	Nov 19, 2019
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

An object of the present invention is to secure a gap between a component on a suction valve side and a component on an anchor side when a valve is closed, regardless of an integration tolerance of a plurality of components, and to be able to reliably close the valve. In an electromagnetic valve mechanism 300 including an anchor assembly 36 and a magnetic core 33 between which a magnetic attraction force acts, and a suction valve 30 configured to be able to come into and out of contact with the anchor assembly 36 , the anchor assembly 36 includes a first anchor assembly component 36 a having a facing surface 36 ab that faces the magnetic core 33 , a second anchor assembly component 36 b configured integrally with the first anchor assembly component 36 a , and a press-fitting portion 36 c that fixes the first anchor assembly component 36 a and the second anchor assembly component 36 b . A press-fitting length L 1 of the press-fitting portion 36 c is set to a length at which the second anchor assembly component 36 b and the suction valve 30 are separated from each other in a state where the suction valve 30 is closed.

First claim

The invention claimed is:

1. An electromagnetic valve mechanism, comprising:
an anchor assembly and a magnetic core between which a magnetic attraction force acts; and
a suction valve configured to be able to come into and out of contact with the anchor assembly,
wherein the anchor assembly includes
a first anchor assembly component having a facing surface that faces the magnetic core,
a second anchor assembly component configured integrally with the first anchor assembly component, wherein the suction valve includes a rod on a side facing the anchor assembly, the rod disposed to come into and out of contact with the second anchor assembly component,
a press-fitting portion that fixes the first anchor assembly component and the second anchor assembly component, and
a press-fitting length of the press-fitting portion is set to a length at which the second anchor assembly component and the suction valve are separated from each other by forming a gap in an axial direction between the second anchor assembly component and the rod in a state where the suction valve is closed.

2. The electromagnetic valve mechanism according to claim 1 , wherein
the first anchor assembly component is made of a magnetic material, and
the second anchor assembly component is made of a material different from a material of the first anchor assembly component.

3. The electromagnetic valve mechanism according to claim 1 , wherein
the magnetic core includes
an outer core, and
an inner core disposed on an inner peripheral portion of the outer core.

4. The electromagnetic valve mechanism according to claim 3 , wherein
the inner core is fixed to the inner peripheral portion of the outer core, and
the inner core includes a first spring that biases the anchor assembly in a valve opening direction, on an inner peripheral portion of the inner core.

5. The electromagnetic valve mechanism according to claim 4 , wherein an end portion of the first spring on the anchor assembly side abuts on a spring seat configured at an end portion of the second anchor assembly component.

6. The electromagnetic valve mechanism according to claim 3 , further comprising
a housing that accommodates a portion of the rod in an inner peripheral portion and includes a sliding portion that slides on the rod,
wherein the housing includes a fixing portion fixed to the outer core.

7. The electromagnetic valve mechanism according to claim 6 , further comprising
a second spring that is disposed on an inner peripheral side of the housing and biases the rod in a valve closing direction,
wherein the housing, the suction valve, and the second spring are configured as an integrated assembly component, and
the fixing portion that fixes the housing to the outer core is formed by the press-fitting portion.

8. A high-pressure fuel supply pump comprising
an electromagnetic valve mechanism constituting a variable capacity mechanism,
wherein the electromagnetic valve mechanism includes
an anchor assembly and a magnetic core between which a magnetic attraction force acts, and
a suction valve configured to be able to come into and out of contact with the anchor assembly,
the anchor assembly includes
a first anchor assembly component having a facing surface that faces the magnetic core,
a second anchor assembly component configured integrally with the first anchor assembly component, wherein the suction valve includes a rod on a side facing the anchor assembly, the rod disposed to come into and out of contact with the second anchor assembly component,
a press-fitting portion that fixes the first anchor assembly component and the second anchor assembly component, and
a press-fitting length of the press-fitting portion is set to a length at which the second anchor assembly component and the suction valve are separated from each other by forming a gap in an axial direction between the second anchor assembly component and the rod in a state where the suction valve is closed.

Assignees

• Hitachi Astemo Ltd

Inventors

• Tamura Shingo
• Yamada Hiroyuki
• Ogura Kiyotaka
• Hashida Minoru

Classifications

• F16K31/0675

  Electromagnet aspects, e.g. electric supply therefor · CPC title

• F16K31/0655

  Lift valves · CPC title

• F16K27/029

  Electromagnetically actuated valves · CPC title

• F02M59/102

  Mechanical drive, e.g. tappets or cams (F02M45/063 takes precedence) · CPC title

• F04B53/1082 Primary

  magnetic · CPC title