KR19990029737U - Vehicle fuel leakage valve - Google Patents

Abstract

The present invention relates to a fuel leakage valve of a vehicle, and when the vehicle is in a normal state, the fuel evaporation gas of the fuel tank is smoothly distributed to the canister, while the vehicle is overturned by blocking the gas flow hole through the floater to turn the fuel on. It is an object of the present invention to provide a fuel leakage valve of a vehicle that reliably prevents the liquid fuel of the tank from leaking into the canister.

In order to achieve the above object, the inlet port 2 connected to the fuel tank and the outlet port 3 connected to the canister are formed parallel to the valve housing 1 at a predetermined interval, and the inside of the valve housing In order to partition the upper inlet chamber communicating with the inlet port, the upper outlet chamber and the lower chamber communicating with the outlet port, the partition wall 4 is installed inclined inside the valve housing, and the upper inlet chamber is in communication with the lower chamber. A first flow hole 8 is formed in the partition wall, and a second flow hole 9 for communicating the lower chamber and the upper outflow chamber is formed in the central portion of the partition wall while opening and closing the first flow hole. The valve 10 is installed in the partition wall, and in the lower chamber, a floater 11 for closing the second flow hole while pressing the valve when the vehicle is overturned through the spring 12. It is a grounded structure.

Description

Vehicle fuel leakage valve

The present invention relates to a fuel leak prevention valve that prevents fuel from leaking to the outside when the vehicle is overturned. Especially, the fuel tank has a spring-loaded floater so that the evaporation gas of the fuel tank can be smoothly moved to the canister when the vehicle is in a normal state. On the other hand, when the vehicle is overturned, the fuel leakage prevention valve of the vehicle that prevents the liquid fuel from flowing back into the canister by blocking the flow hole by the weight of the floater.

In general, an evaporation gas prevention device is installed in a vehicle so that the evaporation gas emitted from gasoline used as a fuel of the vehicle is released to the outside and does not pollute the air. The canister is connected to the fuel tank via an evaporation tube to prevent it from being discharged to the outside, and the canister collects and stores the evaporated gas generated in the fuel tank and supplies it back to the engine.

However, when the vehicle is overturned, the liquid fuel in the fuel tank is supplied to the canister through the evaporation tube to be leaked to the outside. To prevent this, the liquid fuel in the fuel tank is conventionally contained in the evaporation tube when the vehicle is overturned. Fuel leakage prevention valve is installed to prevent leakage to the outside.

1 shows a conventional fuel leakage prevention valve as described above, the fuel tank side inlet port 102 and the canister side outlet port 103 are formed in the valve housing 101 to face each other, and the valve Inside the housing, a partition wall 105 having a plurality of flow holes 104 is integrally formed, and the partition wall 105 is provided with a rubber valve 106 for opening and closing the flow hole 104. On the partition wall, the ball 107 is settled.

Accordingly, when the vehicle is in a normal state, the boil-off gas of the fuel tank is introduced through the inlet port of the valve housing. When the pressure of the boil-off gas reaches a predetermined pressure or more, the rubber valve closes the distribution hole of the partition wall by the gas pressure. To open the flow through the outlet port to the canister.

On the other hand, when the vehicle is overturned, as shown in FIG. 2, the valve is completely displaced by 180 degrees, which causes the ball to block the inlet port so that the liquid fuel in the fuel tank does not flow out into the canister.

However, in the conventional fuel leakage prevention valve structure as described above, when the vehicle is overturned, the fuel leaks to the outside through the valve because it does not maintain complete airtightness by blocking the inlet port with only a ball to prevent the leakage of fuel. There was a flaw.

The present invention has been devised to solve the above-mentioned shortcomings, and when the vehicle is in a normal state, fuel evaporation gas of the fuel tank can be smoothly distributed to the canister, while the vehicle flows through the floater when the vehicle is overturned. It is an object of the present invention to provide a fuel leakage valve of a vehicle which prevents liquid fuel from leaking into the canister by blocking it.

1 is a cross-sectional view in a steady state in which a fuel leakage prevention valve of a vehicle according to the related art distributes fuel evaporation gas,

2 is a cross-sectional view of a state in which a fuel leakage prevention valve of a vehicle according to the prior art prevents leakage of fuel when the vehicle is overturned;

3 is a cross-sectional view in a steady state in which the fuel leakage preventing valve of the vehicle according to the present invention distributes fuel evaporation gas;

4 is a cross-sectional view of a state in which the fuel leakage prevention valve of the vehicle according to the present invention prevents leakage of fuel when the vehicle is overturned.

<Description of Symbols for Main Parts of Drawings>

1-valve housing 2-inlet port

3- Outlet Port 4- Outlet Hole

5-Top Inlet Chamber 6-Top Outlet Chamber

7-Lower chamber 8-First flow hole

9-Second flow hole 10-valve

11-Flotter 12-Spring

The present invention for achieving the above object is, the inlet port connected to the fuel tank and the outlet port connected to the canister is formed in parallel with a predetermined interval in the valve housing, the inside of the valve housing and the inlet port A partition wall is inclined in the valve housing to partition the upper inflow chamber and the upper outflow chamber and the lower chamber in communication with the outlet port, and a first flow hole is provided in the partition wall to communicate the upper inflow chamber with the lower chamber. Is formed, and a second flow hole for communicating the lower chamber and the upper outflow chamber is formed in the center portion of the partition wall, while a valve for opening and closing the first flow hole is installed in the partition wall, and in the lower chamber, A structure in which a floater closing the second flow hole while pressing the valve at the time of overturning is supported by a spring. It is.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view in a steady state in which the fuel leakage valve of the vehicle according to the present invention distributes fuel evaporation gas, that is, an inlet port 2 connected to a fuel tank at an upper portion of the valve housing 1 having a predetermined volume; ) And the outlet port 3 connected to the canister are formed in parallel directions, and the partition wall 4 partitioning the inlet port and the outlet port so as not to communicate with each other is formed to be inclined in the valve housing 1. The partition wall partitions the upper inlet chamber 5, the upper outlet chamber 6, and the lower chamber 7 from the inside of the valve housing.

In addition, a first flow hole 8 is formed at one side of the partition 4 to communicate the upper inlet chamber and the lower chamber with each other, and a second flow hole for communicating the lower chamber and the upper outlet chamber with each other ( 9) is formed at the central portion of the partition wall, and a flexible valve, for example, made of rubber material 10 is installed in the partition wall in order to open and close the first flow hole 8. .

In addition, the lower chamber 7 is accommodated in the plotter 11 is carried through the spring 12, the top of the plotter is formed with an inclined surface (11a) in the same way as the inclined shape of the partition wall A valve protrusion 11b is integrally formed at the upper center of the floater so as to be detachably inserted into the second flow hole and to close the second flow hole.

Accordingly, in the normal state of the vehicle, the gas evaporated in the fuel tank flows to the valve housing through the evaporation tube, which is introduced into the upper inlet chamber through the inlet port of the valve housing.

When the pressure of the boil-off gas in the upper inlet chamber becomes higher than a predetermined value, the pressure of the boil-off gas acts on the rubber valve to push the rubber valve outward and deforms it, thereby opening the first flow hole blocked by the rubber valve. Thus, the boil-off gas in the upper inlet chamber is introduced into the lower chamber through the first distribution hole.

In addition, the evaporated gas introduced into the lower chamber is introduced into the upper outlet chamber through the second flow hole, and then exits the valve housing through the outlet port, flows to the canister, and is collected in the canister.

On the other hand, when the vehicle rolls over, as shown in FIG. 4, the valve is displaced by 180 degrees. In this state, the floater moves toward the partition wall by its own weight so that the upper inclined surface of the floater adheres to the inner surface of the partition wall. Accordingly, the rubber valve is supported by the inclined surface of the floater to completely seal the first flow hole, and the valve protrusion of the floater is inserted into the second flow hole to completely seal the second flow hole.

Therefore, even if the liquid fuel in the fuel tank flows into the upper inlet chamber through the inlet port of the valve housing, the first flow hole is blocked by the rubber valve and the floater, so that it can no longer flow and remains only in the upper inlet chamber. Even if the liquid fuel flows into the lower chamber through the first flow hole, the second flow hole is blocked by the floater so that it does not leak out of the valve housing at all, so that fuel leaks when the vehicle is overturned. It can be prevented.

As described above, according to the fuel leakage valve of the vehicle according to the present invention, while the vehicle is in a normal state, the gas can be smoothly flowed into the canister, while the vehicle is rolled over, two gas flow holes formed in the valve housing. Since the rubber valve is completely blocked by the interaction between the floater and the liquid fuel, the flow of liquid fuel is prevented. Therefore, the fuel can be reliably prevented from leaking when the vehicle is overturned.

Claims (2)

A valve housing having an inlet port connected to a fuel tank and an outlet port connected to a canister, and the interior of the valve housing divided into an upper inlet chamber communicating with the inlet port, and an upper outlet chamber and lower chamber communicating with the outlet port. A partition wall installed obliquely inside the valve housing for building, a first flow hole formed in the partition wall for communicating the upper inflow chamber with the lower chamber, a second flow hole formed in the partition wall for communicating the lower chamber and the upper outflow chamber, A valve provided in a partition wall adjacent to the first flow hole to open and close the first flow hole, and a flow which is supported by a spring in the lower chamber via a spring to close the second flow hole while pressing the valve when the vehicle is overturned. Leakproof valve for vehicles with rotors. 2. The fuel leakage of a vehicle according to claim 1, wherein the floater has an upper surface inclined to correspond to the partition wall, and a valve protrusion is formed at the center of the inclined surface to be detachably inserted into the second flow hole. Valve.