FUEL GAS INJECTION DEVICE AND FUEL CELL SYSTEM

• US 20190305337A1
• Filed: 03/26/2019
• Published: 10/03/2019
• Est. Priority Date: 03/28/2018
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Hatakeda, Tomohiko, Terasawa, Yuji, Mizumoto, Kazuya
• Granted Patent: US 10,950,880 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 8/04201 Reactant storage and supply, e.g. means for feeding, pipes
• CPC Class Codes: H01M 8/04753 of fuel cell reactants
• CPC Class Codes: Y02E 60/50 Fuel cells

Abstract

A fuel gas injection device of a fuel cell system includes an injector device and an ejector device. Mount portions of the injector device each include a mount body joined to a distal-side support portion, a screw member joining the mount body and an ejector body to each other in a state in which the screw member extends in an operating direction of a plunger, and a mount rubber member disposed on an outer circumferential side of a shaft portion of the screw member.

Claims

1. A fuel gas injection device comprising an injector device that includes an injector for injecting a fuel gas, and an ejector device that includes an ejector body attached to an external support member and to which the fuel gas injected from the injector is guided, the fuel gas of the ejector device being supplied to a fuel cell,

the injector device comprising:

an injector support portion supporting the injector;

a rubber member disposed between the injector and the injector support portion; and

a mount portion for attaching the injector support portion to the ejector body,

the mount portion comprising;

a mount body joined to the injector support portion;

a fixing member for joining the mount body and the ejector body to each other, with the fixing member extending in an operating direction of a plunger of the injector; and

a mount rubber member disposed on an outer circumferential side of a shaft portion of the fixing member.

2. The fuel gas injection device according to claim 1,

wherein the injector support portion includes:

a distal-side support portion supporting a distal portion of the injector; and

a proximal-side support portion supporting a proximal portion of the injector, and

the rubber member includes;

a distal-side rubber member held between the injector and the distal-side support portion from the operating direction of the plunger; and

a proximal-side rubber member held between the injector and the proximal-side support portion from the operating direction of the plunger.

3. The fuel gas injection device according to claim 2, wherein the mount rubber member has a hardness that is lower than a hardness of the distal-side rubber member and a hardness of the proximal-side rubber member.

4. The fuel gas injection device according to claim 2, wherein the injector device includes a plurality of the injectors disposed in parallel,

the distal-side rubber member extends so as to surround the distal portion of each of the injectors, and

the proximal-side rubber member extends so as to surround the proximal portion of each of the injectors.

5. The fuel gas injection device according to claim 1,

wherein the mount portion includes:

an annular inside member fixed to the ejector body by the fixing member; and

an annular outside member bonded to the mount body while being disposed on an outer circumferential side of the inside member, and

wherein the mount rubber member abuts on an outer surface of the inside member and an inner surface of the outside member.

6. The fuel gas injection device according to claim 1, wherein the mount portion comprises a plurality of the mount portions that are disposed in a point symmetric manner about a center line of the injector device.

7. The fuel gas injection device according to claim 2,

wherein the ejector body has a hole portion in which a part of the distal-side support portion is inserted, and

a rubber seal member in contact with an inner surface forming the hole portion is attached to the part of the distal-side support portion that is inserted in the hole portion.

8. The fuel gas injection device according to claim 2, wherein the injector support portion comprises a coupling member coupled to the distal-side support member and the proximal-side support member such that a tightening force along the operating direction of the plunger acts to the distal-side rubber member and the proximal-side rubber member.

9. The fuel gas injection device according to claim 8, wherein, with the tightening force acting, a thickness of the distal-side rubber member along the operating direction of the plunger is smaller than a thickness of the proximal-side rubber member along the operating direction of the plunger.

10. The fuel gas injection device according to claim 1, wherein the mount rubber member is formed in an annular shape.

11. A fuel cell system comprising a fuel cell and a fuel gas injection device,

the fuel gas injection device comprising an injector device that includes an injector for injecting a fuel gas, and an ejector device that includes an ejector body attached to an external support member and to which the fuel gas injected from the injector is guided, the fuel gas of the ejector device being supplied to the fuel cell,

the injector device comprising:

an injector support portion supporting the injector;

a rubber member disposed between the injector and the injector support portion; and

a mount portion for attaching the injector support portion to the ejector body,

the mount portion comprising;

a mount body joined to the injector support portion;

a fixing member for joining the mount body and the ejector body to each other, with the fixing member extending in an operating direction of a plunger of the injector; and

a mount rubber member disposed on an outer circumferential side of a shaft portion of the fixing member.

12. The fuel cell system according to claim 11,

wherein the injector support portion includes:

a distal-side support portion supporting a distal portion of the injector; and

a proximal-side support portion supporting a proximal portion of the injector, and

the rubber member includes;

a distal-side rubber member held between the injector and the distal-side support portion from the operating direction of the plunger; and

a proximal-side rubber member held between the injector and the proximal-side support portion from the operating direction of the plunger.

13. The fuel cell system according to claim 12, wherein the mount rubber member has a hardness that is lower than a hardness of the distal-side rubber member and a hardness of the proximal-side rubber member.

14. The fuel cell system according to claim 12, wherein the injector device includes a plurality of the injectors disposed in parallel,

the distal-side rubber member extends so as to surround the distal portion of each of the injectors, and

the proximal-side rubber member extends so as to surround the proximal portion of each of the injectors.

15. The fuel cell system according to claim 11,

wherein the mount portion includes:

an annular inside member fixed to the ejector body by the fixing member; and

an annular outside member bonded to the mount body while being disposed on an outer circumferential side of the inside member, and

wherein the mount rubber member abuts on an outer surface of the inside member and an inner surface of the outside member.

16. The fuel cell system according to claim 11, wherein the mount portion comprises a plurality of the mount portions that are disposed in a point symmetric manner about a center line of the injector device.

17. The fuel cell system according to claim 12,

wherein the ejector body has a hole portion in which a part of the distal-side support portion is inserted, and

a rubber seal member in contact with an inner surface forming the hole portion is attached to the part of the distal-side support portion that is inserted in the hole portion.

18. The fuel cell system according to claim 12, wherein the injector support portion comprises a coupling member coupled to the distal-side support member and the proximal-side support member such that a tightening force along the operating direction of the plunger acts to the distal-side rubber member and the proximal-side rubber member.

19. The fuel cell system according to claim 18, wherein, with the tightening force acting, a thickness of the distal-side rubber member along the operating direction of the plunger is smaller than a thickness of the proximal-side rubber member along the operating direction of the plunger.

20. The fuel cell system according to claim 11, wherein the mount rubber member is formed in an annular shape.