# US 2018/0023722 A1 · Fuel supply valve for fuel cell system

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- Number: US 2018/0023722 A1
- Document ID: US20180023722A1
- Status: Published application
- Kind: A1
- Application number: 15/364,686
- Filed: 2016-11-30
- Published: 2018-01-25
- Earliest claimed: 2016-07-22
- Assignees: Hyundai Motor Company
- Applicants: Hyundai Motor Company
- Inventors: Bu Kil Kwon; Se Kwon Jung; Hyo Sub Shim
- Web page: https://patentgrep.com/patent/US20180023722A1

## CPC

- F16K 31/0655: {Lift valves}
- B64D 2041/005: {Fuel cells}
- Y02E 60/50: Fuel cells
- Y02T 90/40: Application of hydrogen technology to transportation, e.g. using fuel cells
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A fuel supply valve is provided. The fuel supply valve includes a housing of the valve, a plunger and a hollow part. A cavity where the plunger moves is formed at one side of the housing and a contact area is formed between the housing and the plunger based on the movement of the plunger. Accordingly, fuel flow in the cavity is limited by the contact.

## Claims

### Claim 1

A fuel supply valve in which fuel is supplied from a fuel tank to a stack, comprising:
a plunger having a hollow part; and
a housing having a cavity formed therein, wherein the cavity accommodates movement of the plunger,
wherein a contact area is formed between the housing and the plunger based on the movement of the plunger, and
wherein the plunger is pressurized by pressure of fuel introduced to the cavity through the hollow part when the contact area is formed.

### Claim 2 (depends on 1)

The fuel supply valve according to claim 1, wherein the plunger includes:
a bolt plunger that contacts a valve sheet; and
a nut plunger that contacts the housing to form the contact area,
wherein the bolt plunger and the nut plunger are coupled to each other to form the plunger.

### Claim 3 (depends on 1)

The fuel supply valve according to claim 1, wherein the plunger has an end having a diameter greater than a smallest diameter of the housing and the first end of the plunger is blocked by the housing in the cavity.

### Claim 4 (depends on 3)

The fuel supply valve according to claim 3, wherein the contact area is formed between the end of the plunger and the housing.

### Claim 5 (depends on 1)

The fuel supply valve according to claim 1, further comprising
a valve sheet that adheres the plunger to block fuel flow,
wherein adhering between the plunger and the valve sheet and formation of the contact area are synchronized.

### Claim 6 (depends on 1)

The fuel supply valve according to claim 1, wherein the cavity is formed above an upper end of the plunger in an inner space of the housing.

### Claim 7 (depends on 1)

The fuel supply valve according to claim 1, further comprising:
a spring formed between the plunger and an opened side of the housing.

### Claim 8 (depends on 1)

The fuel supply valve according to claim 1, wherein the plunger is symmetric with respect to the hollow part.

### Claim 9 (depends on 1)

The fuel supply valve according to claim 1, wherein the hollow part communicates with the cavity through an orifice.

### Claim 10 (depends on 9)

The fuel supply valve according to claim 9, wherein a size of the hollow part is greater than a size of the orifice.

### Claim 11 (depends on 1)

The fuel supply valve according to claim 1, wherein a bushing is mounted on at least one of inside the housing and outside the plunger.

### Claim 12 (depends on 11)

The fuel supply valve according to claim 11, wherein the bushing is formed of a plastic or a coating film.

### Claim 13 (depends on 1)

The fuel supply valve according to claim 1, wherein, when fuel is discharged to the stack, the movement speed of the plunger is adjusted by flow velocity of fuel discharged from the cavity through a side flow path.

### Claim 14 (depends on 1)

The fuel supply valve according to claim 1, further comprising:
a sealing member disposed on at least one of the plunger and the housing,
wherein the sealing member is disposed at a point of the plunger or the housing, which corresponds to the contact area.