KR20170033939A

KR20170033939A - Fuel tank

Info

Publication number: KR20170033939A
Application number: KR1020150131511A
Authority: KR
Inventors: 최필선; 류부열
Original assignee: 현대자동차주식회사
Priority date: 2015-09-17
Filing date: 2015-09-17
Publication date: 2017-03-28

Abstract

According to an aspect of the present invention, there is provided an internal combustion engine comprising: an outer case having an inner space and having a nozzle for introducing fuel; And an inner case provided inside the outer case and including an adsorption part for adsorbing and storing the fuel introduced through the nozzle part

Description

[0001] FUEL TANK [0002]

The present invention relates to a fuel tank which improves the adsorption efficiency of fuel by securing stability by lowering the pressure when storing compressed natural gas or hydrogen gas.

Generally, a high-pressure vessel such as a fuel tank of a natural gas vehicle or a hydrogen tank of a fuel cell vehicle compresses and stores natural gas or hydrogen gas fuel at a high pressure. This high-pressure vessel decompresses the compressed fuel contained therein to provide the fuel necessary for the engine.

Recently, as natural gas and hydrogen gas are attracting attention as future energy resources, development of vehicles driven by using natural gas or hydrogen gas is progressing. However, in order to store sufficient natural gas or hydrogen gas, the fuel must be compressed and stored at a high level of pressure. Accordingly, the durability of the high-pressure vessel must be sufficiently ensured so that the material and rigidity of the high- Was produced.

In order to solve this problem, a high-pressure vessel for storing natural gas or hydrogen gas using adsorbing material has been developed. In order to reduce the storage pressure when storing natural gas or hydrogen gas, It is not limited to a large extent, and even when the explosion is caused by an accident, the risk is greatly lowered as the storage pressure is low.

However, in the case of the high-pressure vessel to which the adsorbent material is applied, there are many problems in application of the actual vehicle because of the structure for stably supporting the adsorbent material and the technique for improving the adsorption efficiency.

Therefore, there is a need for a support structure for a high-pressure vessel to which the adsorbent material is applied and a technique for improving the adsorption efficiency.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

KR 10-2014-0128038 A (May 11, 2014)

It is an object of the present invention to provide a fuel tank for adsorbing and storing compressed natural gas or hydrogen gas, which stabilizes the internal supporting structure and improves the adsorption efficiency .

To achieve the above object, according to the present invention, there is provided a fuel tank comprising: an outer case having an inner space and having a nozzle for introducing fuel; And an inner case provided inside the outer case and having an adsorption part for adsorbing and storing the fuel flowing through the nozzle part.

The fuel introduced through the outer case is natural gas or hydrogen gas, and the adsorption portion of the inner case is made of a material capable of adsorbing natural gas or hydrogen gas.

The outer case includes a container portion having one side opened and an inner space into which the inner case is inserted, and a lid portion coupled to an open side of the container portion to close the inner space.

The container portion of the outer case is formed into a cylindrical shape by extending a predetermined distance to one side and the other side, and the other side is formed to be convexly protruded in a semicircular shape. The lid portion is formed to project convexly toward one side, .

The container portion of the outer case is formed to be short by a predetermined distance to one side and the other side, and the lid portion is recessed and recessed toward the other side and is coupled to one side of the container portion.

The inner case may further include a diffusion part positioned between the nozzle part and the adsorption part of the outer case and diffusing the fuel introduced through the nozzle part into the adsorption part.

The diffusion protrusions protrude toward the outer case and the protrusions corresponding to the contact protrusions protrude from the outer case.

The contact protrusions protrude from the outer surface of the diffusion portion, and the corresponding protrusions protrude from the inner surface of the outer case to correspond to the contact protrusions, and the contact protrusions and the corresponding protrusions are fused to each other.

The inner case may further include a filter unit for primarily filtering the foreign substances in the fuel diffused through the diffusion part, and a strainer part for filtering the foreign substances in the fuel passed through the filter unit to smoothly flow the fuel .

The diffusion portion, the filter portion, and the strainer portion are sequentially stacked and bonded from one side to the other side so that a filter portion is interposed between the diffusion portion and the strainer portion.

The diffusion portion is formed in a shape corresponding to one side of the outer case and has a plurality of diffusion holes spaced equiangularly radially from a circular center.

And the diffusion hole of the diffusion portion is formed so as to gradually increase in size in the radial direction from the center of the circular portion.

The strainer portion is formed in a shape corresponding to the diffusion portion, inserted into the other side of the diffusion portion, and coupled to the diffusion hole.

The inner case has a radial width smaller than a radial width of the outer case. The inner case and the outer case are spaced apart from each other by a predetermined distance. A plurality of elastic supporting protrusions protrude from the outer side of the inner case, Is contacted.

The elastic support protrusion is a plate spring fixed to the outer surface of the inner case and bent toward the outer case, and is elastically contacted with the inner surface of the outer case.

A plurality of through holes are formed on the outer side surface of the inner case so as to penetrate the inner and outer sides of the inner case, and a filter for filtering foreign substances is provided in the through holes.

And the inner case is formed with a dividing partition inwardly.

According to the fuel tank having the above-described structure, the storage pressure can be lowered by adsorbing and storing compressed natural gas or hydrogen gas.

In addition, as the support structure of the inner case and the outer case provided with the adsorption section is stabilized, the durability performance is ensured and the fuel supplied to the adsorption section of the inner case is uniformly diffused and the adsorption efficiency is improved.

1 is a perspective view of a fuel tank according to a first embodiment of the present invention;
Fig. 2 is a configuration diagram of the fuel tank shown in Fig. 1. Fig.
Figs. 3 to 5 are views for explaining the fuel tank shown in Fig. 1. Fig.
6 is a perspective view of a fuel tank according to a second embodiment of the present invention;
7 is a configuration diagram of the fuel tank shown in Fig.
8 to 9 are views for explaining the fuel tank shown in Fig. 1. Fig.

Hereinafter, a fuel tank according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of a fuel tank according to an embodiment of the present invention, FIG. 2 is a structural view of the fuel tank shown in FIG. 1, and FIGS. 3 to 5 are views for explaining the fuel tank shown in FIG. 1 .

FIG. 6 is a perspective view of a fuel tank according to a second embodiment of the present invention, FIG. 7 is a structural view of the fuel tank shown in FIG. 6, and FIGS. 8 to 9 are views for explaining the fuel tank shown in FIG. to be.

As shown in FIGS. 1 and 2, the fuel tank of the present invention includes an outer case 100 having an inner space and having a nozzle portion 142 for introducing fuel therein; And an inner case 200 provided inside the outer case 100 and having a suction part 220 for sucking and storing the fuel introduced through the nozzle part 142. [

That is, the fuel tank of the present invention comprises an outer case 100 having a strong strength and an inner case 200 for storing and storing fuel. The outer case 100 is provided with a nozzle unit 142, And the inner case 200 provided in the outer case 100 absorbs and stores the fuel introduced through the absorption unit 220. [

Here, the outer case 100 has a rigid strength. However, according to the present invention, as the adsorption unit 220 of the inner case 200 adsorbs and stores the fuel, the storage pressure is widened And can be constructed using a carbon composite material or a plastic material. That is, in order to secure a high strength in the past, there has been a problem that not only the fuel tank is made of a steel material but also a stiffener, so that the weight is increased and the manufacturing cost is increased. However, The contrast strength can be set to a low value, and it can be made of a material having a relatively low strength.

In the outer case 100 of the present invention, carbon fibers may be wound around the outer periphery to further reinforce the strength.

Meanwhile, the inner case 200 is provided with a suction unit 220 for sucking the inflow fuel. In the present invention, the fuel flowing through the outer case 100 may be a natural gas or a hydrogen gas, and the adsorption unit 220 of the inner case 200 may be made of a material capable of adsorbing natural gas or hydrogen gas. have. The adsorption unit 220 may be formed directly in the inner case 200 in the form of fine particles or may be formed into the inner case 200 in advance and inserted into the inner case 200 to be in close contact therewith. In addition, the material of the adsorption unit 220 may be a material for adsorbing natural gas or hydrogen gas, and may be composed of carbon, carbon fiber, metal and organic material combination (MOF), zeolite, etc., Lt; / RTI > Here, the inner case 200 is formed with a dividing partition 204 inward, and the inner case is supported through the dividing partition to secure rigidity.

In this way, the fuel tank of the present invention is composed of the outer case 100 having a secured strength and the inner case 200 for storing and storing the fuel, so that the fuel introduced through the nozzle portion 142 of the outer case 100 And is sucked and stored through the adsorption unit 220 of the inner case 200, thereby lowering the storage pressure, so that stable and efficient storage of the fuel can be achieved.

The outer case 100 includes a container 120 having one side opened and an inner space in which the inner case 200 is inserted inward, And a cover 140 coupled to one side of the inner space to close the inner space.

That is, the outer case 100 is divided into the container unit 120 having one side opened and the lid unit 140 closing one side of the container unit 120 so that the inner case 200 And is easily exchanged when an abnormality of the adsorption unit 220 in the inner case 200 is generated. However, in the present invention, since the storage pressure is low due to the adsorption and storage of the fuel, the outer case 100 may be inserted into the container 120 And the lid part 140, as shown in Fig. The outer case 100 is divided into the container unit 120 and the lid unit 140 so that the lid unit 140 is provided with the nozzle unit 142 and the container unit 120 is provided with the inner case 200 So that the fuel tank can be constructed by integrally joining the container portion 120 and the lid portion 140 together.

1, the container unit 120 of the outer case 100 is formed into a cylindrical shape by extending a predetermined distance to one side and the other side, and the other side is convexly protruded in a semicircular shape And the lid part 140 may protrude to one side and may be coupled to one side of the container part 120. When the container portion 120 of the outer case 100 is formed to have a long cylindrical shape, the amount of fuel adsorbed through the adsorption portion 220 filled in the inner space can be increased.

6, the container unit 120 of the outer case 100 is formed to be short by a predetermined distance on one side and the other side, and the lid unit 140 is concave on the other side And can be coupled to one side of the container part 120. As shown in FIG. If the length of the container portion 120 of the outer case 100 is shortened, even if the storage pressure is increased, the rigidity can be secured easily, and the installation space can be simplified and the installation can be made advantageous.

On the other hand, the fuel tank of the present invention is applied to the first embodiment and the second embodiment in the same manner, and the internal structure according to each embodiment will be described.

2 and 7, the inner case 200 is disposed between the nozzle unit 142 and the adsorption unit 220 of the outer case 100, and the fuel And a diffusion unit 240 for allowing the adsorbing unit 220 to diffuse and diffuse the ultraviolet light.

In addition, the inner case 200 is provided with a filter unit 260 for primarily filtering foreign substances in the fuel diffused through the diffusion unit 240, a secondary filter for filtering the foreign substances in the fuel passing through the filter unit 260, And a strainer portion 280 for allowing the fuel to flow smoothly.

The diffusion part 240, the filter part 260 and the strainer part 280 may be integrally formed with each other. The lid part 140 located at one side of the outer case 100 and the one side of the absorption part 220 So that the foreign substances in the fuel flowing through the nozzle portion 142 of the outer case 100 are filtered and uniformly diffused to be introduced into the adsorption unit 220.

The filter unit 260 is disposed between the diffusion unit 240 and the strainer unit 280 by sequentially stacking the diffusion unit 240, the filter unit 260, and the strainer unit 280 from one side to the other. Can be interposed.

Accordingly, the fuel introduced through the nozzle portion 142 of the outer case 100 is diffused through the diffusion portion 240, the foreign substance is filtered through the filter portion 260, and finally the strainer So that the filtered fuel can be uniformly transferred to the adsorbing part 220. [0064]

9, a contact protrusion 244 protrudes toward the outer case 100 and a corresponding protrusion 244 corresponding to the contact protrusion 244 protrudes from the outer case 100 A gap is formed between the outer case 100 and the diffusion portion 240 so that the fuel introduced through the nozzle portion 142 of the outer case 100 spreads and diffuses into the diffusion portion 240, As shown in FIG. The rigidity of the outer case 100 can be ensured by the structure in which the contact protrusions 244 and the corresponding protrusions 104 are held in contact with each other and the contact protrusions 244 and the corresponding protrusions 104 are fused to each other So that the rigidity can be more secured.

In detail, the diffusion part 240 is formed in a shape corresponding to one side of the outer case, and a plurality of diffusion holes 242 spaced equiangularly radially from the circular center may be formed.

Here, the lid part 140 of the outer case 100 may have a convexly protruding shape as in the first embodiment, or may be recessed concavely toward the other side as in the second embodiment. Accordingly, the diffusion portion 240 may be formed in a semicircular shape such as a convexly protruded or concave depressed shape similar to the shape of the lid portion 140 according to each embodiment, and the nozzle portion 142 may be formed in the lid portion 140, respectively. In addition, the diffusion part 240 has a plurality of diffusion holes 242 formed radially from the center of the circular shape, so that the fuel introduced through the nozzle part 142 protrudes in a semicircular shape or spreads radially along a depressed shape And may be flowed toward the adsorption section 220 side through the diffusion hole 242.

Preferably, the diffusion hole 242 of the diffusion portion 240 may be formed to be gradually larger in size in the radial direction from the center of the circular portion.

The diffusion hole 242 is formed in the center of the circular portion of the diffusion portion 240 so as to be smaller in size in the radial direction of the diffusion portion 240. The fuel injected through the nozzle portion 142 flows into the diffusion portion 240, The diffusion hole 242 formed at the center of the circle is formed to be small in size so that a part of the fuel spreads radially and is introduced into the adsorption unit 220 through the other diffusion holes 242. The fuel that has been delivered to the diffusion portion 240 through the nozzle portion 142 spreads uniformly when the fuel passes through the diffusion portion 240 and is transmitted to the adsorption portion 220, So that the fuel can be adsorbed.

The strainer portion 280 is formed in a shape corresponding to the diffusion portion 240 and inserted into the other side of the diffusion portion 240 and connected to the strainer portion 280 through a filtration hole 282 corresponding to the diffusion hole 242 .

The strainer unit 280 may have a shape corresponding to the diffusion unit 240 and may have a smaller radial width so as to be inserted into the other side of the diffusion unit 240. The strainer unit 280 may include a filter unit 260 And can be fixedly attached to the diffusion portion 240 together with the filter portion 260.

The strainer portion 280 may have a filtration hole 282 corresponding to the diffusion hole 242 of the diffusion portion 240. The filter hole 282 may be formed to be larger than the diffusion hole 242 and may be formed at a position corresponding to the diffusion hole 242 so that the fuel that has flowed into the diffusion portion 240 flows smoothly toward the adsorption portion 220 .

A filter hole 282 is formed at the center of the strainer portion 280 and a filtration hole 282 is formed from a portion spaced apart from the center by a predetermined distance so that fuel that has passed through the center of the expander portion flows into the strainer portion 280, And then flows into the adsorbing portion 220 side so that the fuel can be uniformly injected into the adsorbing portion 220.

The radial width of the inner case 200 is smaller than the radial width of the outer case 100 so that the inner case 200 and the outer case 100 are spaced apart from each other by a predetermined distance. A plurality of elastic support protrusions 290 may protrude from the outer surface of the outer case 100 and may contact the inner surface of the outer case 100.

That is, the inner case 200 is inserted into the outer case 100, and is spaced apart from the outer case 100 such that a predetermined space is formed between the inner case 200 and the outer case 100. As a result, as the fuel is stored in the inner case 200, even when the inner case 200 is inflated when the storage pressure rises, the inflation of the inner case 200 can be absorbed without interfering with the outer case 100. A plurality of elastic support protrusions 290 are protruded from the outer surface of the inner case 200 to resiliently contact the inner surface of the outer case 100 so that the inner case 200 is inserted into the outer case 100 The inner case 200 can be flexibly accommodated in the inner case 200 through the deformation of the elastic supporting protrusions 290 when the inner case 200 is inflated.

The fuel introduced through the nozzle portion 142 of the outer case 100 flows into the space between the inner case 200 and the outer case 100 without being sucked to one side of the suction portion 220, The fuel flowing into the space between the inner case 200 and the outer case 100 through the through holes 230 formed in the inner case 200 to be adsorbed and stored in the absorption unit 220.

The elastic support protrusion 290 is a leaf spring fixed to the outer surface of the inner case 200 and bent toward the outer case 100. The elastic support protrusion 290 can be elastically contacted with the inner surface of the outer case 100. [

That is, as shown in FIG. 4, the elastic support protrusions 290 may be formed of leaf springs, so that both ends thereof are fixed to the outer surface of the inner case 200, and the stop is bent and protruded toward the outer case 100 And the bent portion is elastically brought into contact with the inner surface of the outer case 100 to elastically support the inner case 200 to the outer case 100.

5, a plurality of through holes 230 are formed on the outer side surface of the inner case 200, and a filter for filtering foreign substances may be provided on the through holes 230 . By forming a plurality of through holes 230 on the outer surface of the inner case 200, fuel flowing between the inner case 200 and the outer case 100 flows inward from the outer side of the inner case 200 And adsorbed and stored in the adsorption unit 220. A filter is provided in the through hole 230 so that foreign substances of fuel flowing into the adsorption unit 220 can be filtered and stored in the inner case 200 through a space between the inner case 200 and the outer case 100. [ It is possible to reduce the resistance of the pressure, so that the adsorption and desorption of the fuel can be smoothly performed.

The fuel tank according to the first embodiment shown in Figs. 1 and 2 and the fuel tank according to the second embodiment shown in Figs. 6 to 7 described above. However, in the case of the first embodiment, the outer case 100 is formed to be long in the shape of a cylinder, so that the fuel can be sufficiently filled. In the case of the second embodiment, the outer case 100 is formed in a non- Therefore, it is possible to reduce the space restriction upon mounting on the vehicle and to prevent deformation even if the internal pressure is transmitted unevenly.

The durability performance is ensured by stabilizing the support structure of the inner case 200 and the outer case 100 provided with the suction unit 220 and the fuel supplied to the suction unit 220 of the inner case 200 is uniform So that the adsorption efficiency is improved.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

100: outer case 104: corresponding projection
120: container part 140: lid part
142: nozzle unit 200: inner case
220: suction part 230: through hole
240: diffusion portion 244: contact projection
260: filter part 280: strainer part
282: Filtration hole 290: Elastic support projection

Claims

An outer case having an inner space and having a nozzle for introducing fuel; And
And an inner case provided inside the outer case and having an adsorption part for adsorbing and storing the fuel flowing through the nozzle part.

The method according to claim 1,
The fuel introduced through the outer case is natural gas or hydrogen gas,
Wherein the adsorption portion of the inner case is made of a material capable of adsorbing natural gas or hydrogen gas.

The method according to claim 1,
Wherein the outer case includes a container portion having one side opened and an inner space into which the inner case is inserted, and a lid portion coupled to one side of the opened portion of the container portion to close the inner space.

The method of claim 3,
The container portion of the outer case is formed into a cylindrical shape by extending a predetermined distance to one side and the other side, and the other side is formed to be convexly protruded in a semicircular shape. The lid portion is formed to project convexly toward one side, Features a fuel tank.

The method of claim 3,
Wherein the container portion of the outer case is formed to be short by a predetermined distance to one side and the other side, and the lid portion is recessed and recessed toward the other side, and is coupled to one side of the container portion.

The method according to claim 1,
And a diffusion unit which is disposed between the nozzle unit and the adsorption unit of the outer case and diffuses the fuel introduced through the nozzle unit to be introduced into the adsorption unit.

The method of claim 6,
Wherein the diffusion portion is provided with a contact protrusion protruding toward the outer case, and a corresponding protrusion corresponding to the contact protrusion protrudes from the outer case.

The method of claim 7,
Wherein the contact protrusions protrude from the outer surface of the diffusion portion and the corresponding protrusions protrude from the inner surface of the outer case to correspond to the contact protrusions, and the contact protrusions and the corresponding protrusions are welded to each other.

The method of claim 7,
The inner case may further include a filter unit for primarily filtering the foreign substances in the fuel diffused through the diffusion part, and a strainer part for filtering the foreign substances in the fuel passed through the filter unit to smoothly flow the fuel Features a fuel tank.

The method of claim 9,
Wherein the diffusion portion, the filter portion, and the strainer portion are sequentially stacked and coupled from one side to the other side so that a filter portion is interposed between the diffusion portion and the strainer portion.

The method of claim 6,
Wherein the diffusion portion is formed in a shape corresponding to one side of the outer case and has a plurality of diffusion holes spaced equiangularly radially from a circular center.

The method of claim 11,
Wherein a diffusion hole of the diffusion portion is formed so as to gradually increase in size in a radial direction from a circular center.

The method of claim 12,
Wherein the strainer portion is formed in a shape corresponding to the diffusion portion, and is inserted and coupled to the other side of the diffusion portion, and a filtration hole corresponding to the diffusion hole is formed.

The method according to claim 1,
The inner case has a radial width smaller than a radial width of the outer case. The inner case and the outer case are spaced apart from each other by a predetermined distance. A plurality of elastic supporting protrusions protrude from the outer side of the inner case, Of the fuel tank.

15. The method of claim 14,
Wherein the elastic support projection is a plate spring fixed to an outer surface of the inner case and bent toward the outer case, and is elastically contacted to an inner surface of the outer case.

15. The method of claim 14,
Wherein a plurality of through holes are formed in the outer side surface of the inner case so as to pass through the inner and outer sides of the inner case, and a filter for filtering foreign substances is provided in the through holes.

The method according to claim 1,
And a partitioning partition is formed inwardly in the inner case.