KR20230018059A - Lpg fule tank for vehicle - Google Patents

Abstract

Disclosed is an LPG fuel tank for an automobile which comprises: a tank main body unit having an upper part case and a lower part case disposed facing each other, and formed to a status having a fuel storage space of a donut type at the inside by union combination of the cases; and an expansion storage unit formed on the tank main body unit side, and formed to a status forming an expansion storage space communicating with the fuel storage space side at the donut-shaped circumference part center of the fuel storage space. An objective of the present invention is to provide the LPG fuel tank for the automobile having a tank structure.

Description

LPG fuel tank for vehicles {LPG FULE TANK FOR VEHICLE}

The present invention relates to an LPG fuel tank for automobiles.

In general, a vehicle using LPG (liquefied petroleum gas) as a fuel is equipped with an LPG fuel tank for charging and storing the fuel.

As is well known, LPG fuel is obtained by pressurizing and liquefying hydrocarbon-based gas among petroleum components at room temperature. In order to secure stability when used as a fuel for automobiles, fuel with a structure that can ensure storage stability and shape stability corresponding to this. A tank is required.

Therefore, the LPG fuel tank for automobiles is preferably formed to have a tank structure capable of stably securing airtightness and pressure resistance while realizing light weight.

If such an automobile LPG fuel tank is divided into external shapes, there are a cylindrical tank and a toroidal (or toroidal) tank, and most of them are installed and used inside the trunk of a passenger car.

In particular, the donut-shaped tank can be installed on the side of the spare tire mounting groove prepared on the bottom of the trunk of a car, so it has the external advantage of securing space efficiency inside the trunk, but most of the donut-shaped tank circumference center Since it exists as an idle space, there is a disadvantage in that the fuel charging storage efficiency is not good compared to the tank size.

(Patent Document 0001) Registered Patent Publication No. 10-1408659_ Fuel storage device for mounting in a vehicle trunk.

The present invention has been made to solve the conventional problems as described above,

An object of the present invention is to provide an LPG fuel tank for vehicles having a tank structure capable of further increasing fuel storage efficiency and shape stability.

In order to realize the object of the present invention as described above,

A tank body having an upper case and a lower case disposed facing each other and having a donut-shaped fuel storage space inside by combining the cases; and

an expansion storage unit formed on the side of the tank body and forming an expansion storage space communicating with the fuel storage space at the center of the toroidal circumference of the fuel storage space;

Including,

The extended storage unit,

an upper dome formed in a dome shape at a central portion of the circumferential portion of the upper case of the tank body portion;

a lower dome formed in a dome shape at the central portion of the circumference of the lower case while facing the upper dome side; and

an expansion case disposed in a state of being connected between the upper dome and the lower dome and forming an expansion storage space communicating with the fuel storage space;

It provides an LPG fuel tank for vehicles comprising a.

In the present invention, the expansion storage unit is formed on the side of the tank body having the donut-shaped fuel storage space, and the expansion storage unit secures the expansion storage space in association with the donut-shaped fuel storage space side. , Since it provides a structure that matches the shape deformation suppression of the tank, the effect of further increasing the shape stability of the tank as well as improving the fuel storage efficiency of the tank can be expected.

1 is a diagram schematically showing the overall structure of an LPG fuel tank for automobiles according to an embodiment of the present invention.
2 to 8 are views for explaining the detailed structure and operation of the LPG fuel tank for automobiles according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiments of the present invention are described to the extent that those with average knowledge in the art can practice the present invention.

Therefore, since the embodiments of the present invention can be modified in many different forms, the claims of the present invention are not limited due to the embodiments described below.

1 is a diagram schematically showing the entire structure of an LPG fuel tank for automobiles according to an embodiment of the present invention, and FIGS. 2 to 8 are diagrams for explaining detailed structures and actions, see FIGS. 1 to 5 When, the LPG fuel tank for automobiles according to an embodiment includes a tank body portion 10 and an expansion storage portion 20.

The tank body portion 10 has a donut-type tank shape as shown in FIG. 1, and is formed to have a structure capable of storing LPG fuel (G, hereinafter referred to as “fuel”) for automobiles inside. .

The tank main body 10 includes an upper case 12 and a lower case 14 as shown in FIGS. 2 and 3, and is formed to have a toroidal tank shape by combining the two cases 12 and 14. do.

The upper case 12 and the lower case 14 are formed to have a structure in which a toroidal fuel storage space S can be secured while being coupled to face each other.

As shown in FIGS. 2 and 3 , the upper case 12 has a donut-shaped inner space S1 with an open lower side, and the lower case 14 has a donut-shaped inner space S2 with an open upper side. It can be made in the form provided with.

That is, the upper case 12 and the lower case 14 are combined in a state in which the two inner spaces S1 and S2 face each other to form one space as shown in FIGS. 2 to 3, and the inside of the toroidal fuel It is formed to have a structure capable of achieving the outer shape of the donut-shaped tank body portion 10 in which the storage space S is formed.

The material of the upper case 12 and the lower case 14 may be selected from among metal materials having excellent durability and corrosion resistance and easy welding.

In addition, the upper case 12 and the lower case 14 may be coupled and fixed to each other by a joint portion W1 obtained by welding a contact point on an outer circumference of the case in a state in which they are united to face each other as shown in FIG. 3 .

As shown in FIG. 4, the upper case 12 and the lower case 14 are formed with protrusions A1 and grooves A2 corresponding to each other on the circumference of the case, and in a temporary setting state where they are inserted into each other Weld joints can be processed.

Then, during the welding operation, it is possible to prevent a phenomenon in which the combined positions of the upper case 12 and the lower case 14 are dislocated from each other, and in particular, the protruding portion A1 and the groove portion A2 side serve as a kind of reinforcing rib (RIB). By doing so, the shape stability of the case can be further increased.

As shown in FIG. 1 , a mounting bracket 16 and a fuel supply bracket 18 may be formed on the tank body 10 side, respectively.

Although not shown in the drawing, the mount bracket part 16 has a bracket structure that can be detachably fixed by bolting in a state where the tank body part 10 side is horizontally placed on the side of the spare tire mounting groove provided on the trunk side of the car. can be formed

The bracket part 18 for the fuel supply device may be formed to have a bracket structure in which a fuel supply device for discharging and supplying the fuel G contained in the fuel storage space S side by a suction (pumping) method can be installed. .

On the other hand, the expansion storage unit 20 is formed to provide an expanded space for storing fuel G on the side of the donut-shaped tank body unit 10 .

In particular, the expansion storage unit 20 is formed to have a structure capable of providing a built-in expansion storage space E in association with the fuel storage space S from the inside of the tank body 10 .

Referring to FIGS. 3 and 5 , the expansion storage unit 20 is formed on the side of the upper case 12 of the tank body 10 and faces the upper dome 22 and the upper dome 22 side. A lower dome 24 formed on the side of the furnace lower case 14 and an expansion case 26 disposed in a state of connecting the upper dome 22 and the lower dome 24 are provided.

As shown in FIG. 3 , the upper dome 22 and the lower dome 24 are formed to cover the central portions of the circumferences of the upper case 12 and the lower case 14 in a dome shape.

The upper dome 22 and the lower dome 24 may be integrally formed, for example, when the upper case 12 and the lower case 14 are manufactured, and the material is the upper case 12 and the lower case 14 It may be made of the same metal material as

The upper dome 22 and the lower dome 24 are formed to form an upper surface (ceiling) and a lower surface (floor surface) of the expansion storage space E in association with the side of the expansion case 26 to be described later.

The expansion case 26 is disposed between the upper dome 22 and the lower dome 24 to form a circumference of the expansion storage space E.

In particular, the expansion case 26 is formed by being divided into two, so that when the upper case 12 and the lower case 14 face each other and are welded together, they are connected to each other to form a single space.

The expansion case 26 is composed of two divided cases C1 and C2 having a hollow cylindrical shape as shown in FIG. 5, and the two divided cases C1 and C2 are the upper case 12 and the lower case 12. It is fixedly formed on the side of the case 14 in a state corresponding to each other.

That is, one end of the split case C1 among the two split cases C1 and C2 is fixed to the bottom side of the upper dome 22 of the upper case 12 when viewed from the base of FIG. It can be fixedly formed in a connected state.

In addition, the other divided case C2 may be fixedly formed in a connection state in which one end is fixed to the upper surface of the lower dome 24 of the lower case 14 with respect to FIG. 5 and is erected upward.

The connection and fixing of the divided cases C1 and C2 may be performed by welding the fixed ends of the cases and the upper and lower domes 22 and 24 to form the junctions W2 and W3.

At the free end side of the two split cases (C1, C2), female and male threaded parts (B) are formed in a state corresponding to each other, and the screw part (B) is screwed into the free end side of the two divided cases (C1, C2). It is formed so that it can be connected and fixed to each other.

In addition, when the upper case 12 and the lower case 14 are combined in a state facing each other, the screw portion B is formed to be able to play a role of holding so that the combined state is fixed by a screw fastening force.

And, a passage hole (H) is formed on the circumferential side of the divided cases (C1, C2), and this passage hole (H) has a shape of a hole through which the fuel storage space (S) and the extended storage space (E) can communicate with each other. , and one or more may be formed.

When the upper case 12 and the lower case 14 are combined to form the donut-shaped tank body 10 as shown in FIGS. 2 and 3, the expansion storage unit 20 is associated with the tank A built-in expansion storage space E may be formed inside.

That is, when the upper case 12 and the lower case 14 are disposed to face each other, when the threaded parts B of the divided cases C1 and C2 are combined in such a manner as to fasten each other, the split cases C1 and C2 The free end sides are fastened to each other, so that the upper case 12 and the lower case 14 can also be fixed in a combined state by screw fastening force.

Further, in a state in which the upper case 12 and the lower case 14 are combined with each other, the circumferential side of these cases may be welded to form a joint portion W1 to enable coupling and fixation in a combined state.

Then, the tank body 10 is formed in a state having a toroidal fuel storage space S by combining the upper case 12 and the lower case 14, and the inside of the tank body 10 A built-in extended storage space E communicating with the side of the fuel storage space S may be additionally formed.

Therefore, the expansion storage unit 20 is formed inside the tank body unit 10 in a state of having a built-in structure, especially in connection with the combination of the upper case 12 and the lower case 14 of the tank body unit 10. By doing so, it is possible to provide a structure in which the extended storage space E can be easily secured.

And, since the expansion storage unit 20 is formed in a state of connecting and holding the upper case 12 and the lower case 14 in the upper and lower directions inside the tank body unit 10 as shown in FIG. 3, the tank It is possible to provide a structure consistent with improved pressure resistance and shape stability.

Referring to FIGS. 6 to 8 , the LPG fuel tank for a vehicle according to an embodiment of the present invention may further include a space adjusting unit 30 corresponding to the expansion storage unit 20 side.

The space control unit 30 is formed to provide a structure in which the space size of the expansion storage space E can be flexibly adjusted according to the remaining amount of fuel G in the expansion storage unit 20 .

As shown in FIG. 6, the space adjusting unit 30 includes a control unit 32 disposed inside the expansion case 26 and an elastic unit 34 having an elastic force for elastically inducing the movement of the control unit 32. It is made by providing

The adjuster 32 is disposed inside the cylindrical expansion case 26, has a disk shape corresponding to the circumference of the expansion storage space E, and along the longitudinal direction of the expansion storage space E, for example, It may be set to enable a slide operation in the form of a piston.

The control unit 32 may be selected from among metals or synthetic resins having excellent corrosion resistance, abrasion resistance and durability.

As shown in FIG. 6, a ring-shaped sealing ring 36 may be installed on the circumferential side of the adjusting member 32.

The sealing ring 36 blocks the contact area between the circumference of the adjusting device 32 and the inner circumferential surface of the expansion storage space E in a sealed state, and has a ring structure capable of suppressing friction due to contact. It can be formed and set to have.

The elastic ball 34 may be selected and used among springs, and preferably, a compression coil spring may be used.

That is, as shown in FIG. 6, the elastic sphere 34 is disposed in a state of elastically supporting the upper surface side of the control unit 32 inside the expansion case 26, and moves the control unit 32 side downward along the case extension direction. It can be set in a state in which it can be pushed elastically toward.

Then, the adjusting member 32 is disposed inside the expansion case 26 in a state supported by the elastic member 34, and is expanded storage space in a state corresponding to the remaining amount of fuel G in the expansion storage space E. The sliding operation can be performed so that the size of the space of (E) is elastically adjusted.

For example, when the fuel G is filled in the extended storage space E side through the passage hole H of the expansion case 26, the expansion storage space, as shown in FIG. (E) can be elastically slid so that the maximum space size can be secured.

In addition, when the remaining amount of fuel (G) in the extended storage space (E) gradually decreases, the control unit (32) is expanded as shown in FIG. 8 so that no idle space is generated in the extended storage space (E) It can be elastically slid so that the size of the storage space E can be gradually reduced.

This space adjusting unit 30 can be operated so that the size of the space of the extended storage space E is elastically adjusted in a state consistent with the remaining amount of fuel G stored in the expansion storage unit 20, and thus By the same action, a storage atmosphere in a state in which the fuel G is continuously pushed toward the passage hole H in the extended storage space E can be realized.

Therefore, the space control unit 30 can provide a space control structure capable of inducing the distribution and flow of fuel G in a state consistent with smooth storage and discharge supply in conjunction with the expansion storage unit 20 side. .

Therefore, the present invention has a donut-shaped fuel tank shape by combining the upper case 12 and the lower case 14, but the expansion storage unit 20 occupies the idle space in the center of the donut-shaped tank circumference. ) is formed to provide an LPG fuel tank structure capable of further increasing the fuel (G) storage efficiency and shape stability of the tank by the expansion storage unit 20.

10: tank body part 20: expansion storage part
30: space control unit G: fuel
E: Extended storage space

Claims (7)

A tank body having an upper case and a lower case disposed facing each other and having a donut-shaped fuel storage space inside by combining the cases; and
an expansion storage unit formed on the side of the tank body and forming an expansion storage space communicating with the fuel storage space at the center of the toroidal circumference of the fuel storage space;
Including,
The extended storage unit,
an upper dome formed in a dome shape at a central portion of the circumferential portion of the upper case of the tank body portion;
a lower dome formed in a dome shape at the central portion of the circumference of the lower case while facing the upper dome side; and
an expansion case disposed in a state of being connected between the upper dome and the lower dome and forming an expansion storage space communicating with the fuel storage space;
LPG fuel tank for vehicles comprising a. The method of claim 1,
The tank body part,
An automotive LPG fuel tank in which the upper case and the lower case are coupled and fixed in a combined state by welding joints of outer circumferential contact portions of the cases in a state in which they are combined to face each other.

The method of claim 1,
The upper dome and the lower dome of the expansion storage unit,
An LPG fuel tank for automobiles formed to have a dome shape capable of blocking both end sides in the longitudinal direction of the expansion case at the central portion of the circumference of the upper case and the lower case. The method of claim 1,
The extended case,
It consists of two split cases, and the two split cases are arranged to connect between the upper dome and the lower dome and are set to form the extended storage space inside. The method of claim 4,
The two split cases,
The LPG fuel tank for vehicles, characterized in that one end is fixed to the upper dome and the lower dome by welding, and the free end of the other side is connected by screwing. The method of claim 1,
The LPG fuel tank for the vehicle,
Further comprising a space adjusting unit corresponding to the expansion storage unit side,
The space control unit,
An automobile LPG fuel tank comprising: an adjusting member arranged to allow a sliding operation inside the expansion case; and an elastic member having an elastic force for elastically inducing the sliding movement of the adjusting member. The method of claim 6,
The elastic sphere,
An LPG fuel tank for a vehicle disposed inside the expansion case and set to be supported in a state of elastically pushing the side of the control device.

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