KR20200062735A - Restrictor inserted into filler pipe of fuel tank for vehicle and fuel tank system having the same - Google Patents

Abstract

Provided are a restrictor inserted into a filler pipe of a fuel tank for a vehicle and a fuel tank system for a vehicle including the same. The restrictor comprises: a gas gun insertion pipe formed on one side of a body; an opening unit formed on an upper side of the gas gun insertion pipe at a position facing a recirculation line for recirculating vapor gas in the fuel tank when supplying fuel into the vehicle; and a backflow prevention plate which is formed on one end of the gas gun insertion pipe for preventing the fuel from flowing backward when the fuel is completely supplied to the vehicle. The backflow prevention plate is made in a disk shape along an inner circumferential edge of the filler pipe, and a cutting lip is formed around the gas gun insertion pipe for controlling the recirculation of vapor gas. The restrictor inserted into a filler pipe of a fuel tank for a vehicle and the fuel tank system for a vehicle including the same can prevent fuel from flowing backward and increase the recirculation efficiency of vapor gas at the same time.

Description

A restrictor inserted into filler pipe of fuel tank for vehicle and fuel tank system having the same}

The present invention relates to a respirator and a vehicle fuel tank system including the same, and more particularly, to a respirator inserted into a filler pipe of a vehicle fuel tank and a vehicle fuel tank system including the same.

In general, a vehicle is provided with a fuel tank for storing fuel required for combustion of the engine, and a filler pipe is connected to the fuel tank to refuel the fuel tank through the filler pipe when refueling.

While refueling the fuel tank, vapor gas is generated by the fuel in the fuel tank. Since the fuel tank is sealed from the outside, the pressure in the fuel tank may increase due to the vapor gas. To prevent this, a recirculation line connecting the fuel tank and the filler pipe is formed to recirculate the vapor gas. A restrictor, on which a fuel gun is seated, is installed around the connection of the recirculation line and the filler pipe, and there is a great difference in the recirculation efficiency of the baby gas according to the shape and position of the respirator.

On the other hand, when the fuel tank is full of fuel and stops refueling, the refueled fuel flows partially through the filler pipe. Depending on the shape of the fuel tank or the structure of the vehicle, the refluxed fuel flows out of the filler pipe or There is a splashing problem.

The problem to be solved by the present invention is to provide a restrictor capable of increasing the efficiency of recirculation of the vapor gas while preventing backflow of fuel.

Another problem to be solved by the present invention is to provide a fuel tank system for a vehicle including such a lister.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The restrictor according to an embodiment of the present invention for achieving the above-described subject is a restrictor inserted into a filler pipe of a fuel tank for a vehicle, wherein a refueling gun insertion pipe is formed on one side of the body, and an upper side of the refueling injection tube An opening is formed at a position opposite to a recirculation line for recirculating the vapor gas in the fuel tank when refueling the vehicle, and a countercurrent blocking plate is formed at one end of the refueling gun insertion pipe to prevent fuel backflow when refueling is completed. , The countercurrent blocking plate is formed in a disc shape along the inner periphery of the filler pipe, but a cutting lip is formed around the refueling pipe to control recirculation of the vapor gas.

The refueling insertion tube is coupled to the lower center of the countercurrent blocking plate, and the cutting ribs may be formed at both sides of the refusal blocking plate around the main refusal insertion tube.

The cutting lip may be located below the longitudinal axis of the gas gun insertion tube.

Around the opening may further include a fence portion protruding from the refueling line into the recirculation line.

The ground plate hinged to the body is disposed in the gas filling tube through the opening, and the fence portion is provided with a U-shaped horizontal cross-section open toward the ground plate so as not to interfere with the hinge movement of the ground plate. Can have

The body, the refueling gun insertion tube and the countercurrent blocking plate may be integrally formed of a single plastic material.

A vehicle fuel tank system according to an embodiment of the present invention for achieving the above other object includes a fuel tank, a filler pipe connected to the fuel tank, and the restrictor inserted into the filler pipe.

Specific details of other embodiments are included in the specific contents and drawings.

According to the list according to the present invention and the fuel tank system for a vehicle including the same as described above, there are excellent effects as follows.

First, it is possible to prevent the fuel from flowing backward through the filler pipe after refueling. Specifically, the backflow blocking plate formed at one end of the gas gun insertion pipe has a disc shape and is formed along the inner periphery of the filler pipe. Therefore, since the backflow prevention plate mostly blocks the inside of the filler pipe other than the refueling gun insertion pipe, it is possible to minimize the fuel backflow through the filler pipe.

Second, although the backflow blocking plate mostly blocks the inside of the filler pipe, it is possible to increase the recirculation efficiency of the vapor gas. Specifically, an opening is formed at a position opposite to the recirculation line on the upper side of the refueling plate, and a cutting lip is formed around the refueling plate around the refueling plate. Vapor gas introduced into the filler pipe through the regeneration line is recirculated back to the fuel tank through the refueling gun insertion pipe through the opening, and the vapor gas that has not flowed into the opening is returned through the cutting lip formed at the edge of the backflow prevention plate. It is recirculated to the fuel tank. The fuel ejected from the refueling gun flows rapidly through the refueling gas inlet pipe into the fuel tank, and the air velocity around the flowing fuel is relatively fast compared to other places. In the case of the present invention, by forming an opening in the gas gun insertion tube or by forming a cutting lip around the gas gun insertion tube, it is possible to increase the efficiency of recirculation of the vapor gas by forming a moving path of the vapor gas around the rapidly flowing fuel.

Third, it is possible to control the type of the refueling gun inserted by adjusting the diameter of the refueling gun insertion tube in which the refueling gun is placed. For example, in the case of a gasoline vehicle, it is possible to prevent the user from accidentally refueling the diesel in the gasoline vehicle by setting the diameter of the gasket insertion pipe smaller than the diameter of the diesel fueling gun.

1 is a view schematically showing a fuel tank system for a vehicle according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the restrictor of FIG. 1.
FIG. 3 is a front view showing the countercurrent blocking plate of FIG. 2.
FIG. 4 is a cross-sectional view of the restrictor of FIG. 2 taken along line AA'.
5 is a view showing a case where the gas gun is inserted into the list of Fig. 2;

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and the ordinary knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

1 is a view schematically showing a fuel tank system for a vehicle according to an embodiment of the present invention.

The fuel tank system 1 for a vehicle of the present invention includes a fuel tank 10 storing fuel 12 and a filler pipe connected to one side of the fuel tank 10 to become an inflow path of the fuel 12. (20), a recirculation line (30) connecting the fuel tank (10) and the filler pipe (20) to recirculate vapor gas (vapor gas), and the end of the filler pipe (20) It may include the list 100 is inserted into the pipe neck (22).

The fuel 12 introduced through the refueling gun inserted in the listctor 100 is stored in the fuel tank 10 through the filler pipe 20, and the vapor gas emitted from the fuel 12 in the fuel tank 10. Is introduced into the filler pipe 20 through the recirculation line 30 and then recycled back to the fuel tank 10 or discharged outside the vehicle.

The restrictor 100 of the present invention is a device that controls the type of the refueling gun to be inserted, prevents the fuel 12 from flowing backward through the filler pipe 20 after refueling, and at the same time increases the efficiency of recirculation of the vapor gas. .

Hereinafter, a list literal according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 5. FIG. 2 is a perspective view showing the restrictor of FIG. 1. FIG. 3 is a front view showing the countercurrent blocking plate of FIG. 2. FIG. 4 is a cross-sectional view of the restrictor of FIG. 2 taken along line AA'. 5 is a view showing a case where the gas gun is inserted into the list rig of FIG. 2.

The list 100 includes a body 104, a refueling stopper plate 120 formed at one end of the refueling gun insertion pipe 106 and a refueling stopper plate 120 formed at one end of the main body 104. Here, the body 104, the refueling gun insertion pipe 106 and the reverse flow prevention plate 120 is preferably formed integrally with a single material. For example, they can be formed from plastic materials.

The body 104 has a cylindrical shape as a whole, and one side of the body 104 is an area to which the main oil insertion tube 106 is coupled and a portion other than the main oil insertion tube 106 has a blocked structure. The other side of the body 104 is an open structure to form a fuel injection port 102 into which a gas gun is inserted.

The refueling gun insertion pipe 106 has a tube or tube shape as a whole, and it is possible to control the type of refueling gasoline inserted (gasoline gasoline or diesel gasoline) by adjusting the diameter of the gasoline insertion tube 106. An opening 110 is formed above the refueling gun insertion pipe 106. The opening 110 is formed at a position facing the recirculation line 30, preferably, the connection portion of the recirculation line 30 and the filler pipe 20 is preferably disposed on the upper portion of the opening 110. (See Figure 5). Due to this arrangement, when the vapor gas in the fuel tank 10 is supplied to the filler pipe 20 through the recirculation line 30, the vapor gas (see reference numeral 130 in FIG. 4) is a gas refueling insertion tube. It can be easily introduced into the opening 110 of the 106 and then recycled back to the fuel tank 10 at a high rate with the fuel.

A fence portion 108 protruding upwardly from the gas filling gun insertion pipe 106 is formed around or around the opening 110. The fence portion 108 forms a guide path so that the vapor gas can be introduced into the opening 110 well, and for this purpose, may protrude toward the recirculation line 30.

The ground plate 112 is hinged to one side of the body 104. The ground plate 112 is inserted and disposed in the gas gun insertion pipe 106 through the opening 110 and is electrically connected to an external metal member (not shown) through the ground wire 114. Therefore, when the refueling gun enters the refueling gun insertion pipe 106, it is in contact with the ground plate 112 to prevent the occurrence of an electrostatic spike. On the other hand, when the ground plate 112 is in contact with the refueling gun rotates upward about the hinge, the fence portion 108 is grounded so as not to interfere with the hinge movement (or rotational movement) of the ground plate 112 It may have a U-shaped horizontal cross-section which is an open structure toward the plate 112.

The backflow blocking plate 120 is formed at one end of the refueling gun insertion pipe 106 and may be formed in a disc shape as a whole along the inner periphery of the filler pipe 20. Since the backflow blocking plate 120 mostly blocks the inside of the filler pipe 20 other than the refueling gun insertion pipe 106, when the refueling is completed, the flow of fuel through the filler pipe 20 can be prevented. The refueling gun insertion pipe 106 may be coupled to the bottom of the center of the disk of the backflow blocking plate 120. In other words, the refueling gun insertion pipe 106 is preferably disposed adjacent to the lower portion of the filler pipe 20, by reducing the drop when the fuel to be passed through the refueling pipe insertion pipe 106 and the filler pipe 20. Foaming in the fuel can be minimized.

2 and 3, a cutting lip 122 is formed at an edge of the backflow blocking plate 120 to control recirculation of the vapor gas. If the backflow blocking plate 120 is blocking all the inside of the filler pipe 20, the vapor gas will recirculate only through the opening 110 (see reference numeral 130 in FIG. 4). However, in the case of the present invention, not only the opening 110 is installed in the gas filling gun insertion pipe 106 to increase the recirculation efficiency of the vapor gas, but the vapor gas that has not flowed into the opening 110 is at the edge of the backflow blocking plate 120 It can be recycled back to the fuel tank 10 through the cutting lip 122 formed in (see reference numeral 132 in Figure 4). Since the cutting lip 122 is formed around the lubricating gun insertion pipe 106, the vapor gas through the cutting lip 122 is also rapidly fueled by the fuel ejected through the lubricating gas insertion pipe 106. ). Preferably, the cutting lip 122 may be formed on both sides around the oiling gun insertion tube 106. More preferably, the cutting lip 122 may be located below the longitudinal axis of the gas gun insertion tube 106.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may be implemented in other specific forms without changing the technical spirit or essential features of the present invention. You will understand. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

1: Vehicle fuel tank system
10: fuel tank
12: Fuel
20: filler pipe
22: pipe neck
30: Recirculation line
100 listist
102: fuel inlet
104: body
106: gas gun insertion tube
108: fence
110: opening
112: ground plate
114: ground wire
120: backflow blocking plate
122: cutting lip
130, 132: Vapor gas
140: oil gun

Claims (7)

As a literal inserted into the filler pipe of a vehicle fuel tank,
A refueling gun insertion pipe is formed on one side of the body, and an opening is formed at a position opposite to a recirculation line for recirculating the vapor gas in the fuel tank when refueling the vehicle on the upper side of the refueling gasket insertion pipe. At one end of the insertion pipe, a countercurrent blocking plate is formed to prevent fuel backflow when refueling is completed, and the countercurrent blocking plate is formed in a disc shape along the inner periphery of the filler pipe, but recirculates the vapor gas around the refueling gun insertion pipe. Lister characterized in that the cutting lip is formed to control the. According to claim 1,
The refueling gun insertion tube is coupled to the bottom of the center of the backflow stopper plate, the cutting rib is characterized in that formed on both sides of the refueling stopper plate around the main refueling stopper tube. According to claim 1,
The cutting lip, characterized in that located below the longitudinal axis of the gas gun insertion tube. According to claim 1,
A restrictor further including a fence portion protruding from the refueling line to the recirculation line around the opening. The method of claim 4,
The ground plate hinged to the body is disposed in the gas filling tube through the opening, and the fence portion is provided with a U-shaped horizontal cross-section open toward the ground plate so as not to interfere with the hinge movement of the ground plate. List character characterized by having. According to claim 1,
The body, the refueling gun insertion tube and the reverse flow prevention plate characterized in that the integral formed of a single plastic material. A fuel tank system for a vehicle, comprising a fuel tank, a filler pipe connected to the fuel tank, and the restrictor of claim 1 inserted into the filler pipe.

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