KR102653692B1 - The isolation board for fuel tank of lpg vehicle - Google Patents

Abstract

The present invention relates to a fuel tank isolation board for LPG vehicles.
Especially in the case of SUV vehicles where the cabin and trunk are not spatially isolated, it is necessary to completely isolate the LPG fuel cylinder from the cabin. Otherwise, a situation will be created where the vehicle will be driven with the fuel cylinder exposed to the vehicle's occupants. In addition to completely physically isolating the fuel cylinder, it is necessary to effectively block noise or vibration generated from the fuel cylinder. In addition, load-bearing capacity must be improved to prevent various loads placed on the trunk carpet from being transferred to the fuel cylinder. The present invention proposes a fuel tank isolation board for LPG vehicles that faithfully achieves these challenges.

Description

LPG vehicle fuel tank isolation board {THE ISOLATION BOARD FOR FUEL TANK OF LPG VEHICLE}

The present invention relates to a board installed in a car, and particularly to a board installed in the trunk of an LPG vehicle.

It is known that vehicles using LPG as fuel are more friendly to preventing the spread of fine dust than vehicles using gasoline or diesel fuel. It is expected that more people will choose LPG vehicles, and that more vehicles will change fuel to LPG and install LPG fuel tanks in their vehicles. Fuel tanks cannot be installed inside the cabin where passengers are located for safety reasons. Therefore, LPG vehicles have an LPG fuel tank installed in the trunk.

Conventionally, LPG vehicles were sedan-type vehicles, and the cabin and trunk where the fuel tank was installed were structurally isolated. However, in types such as sports utility vehicles (SUVs), the cabin and trunk are not structurally isolated. If a fuel tank is installed in such a vehicle, how can the area where the fuel tank is located and the cabin be effectively isolated? Not only must safety be ensured, but ride comfort must be secured by reducing various NVH (Noise Vibration and Harshness) generated from the fuel tank, and at the same time, the fuel tank must be managed effectively.

The inventor of the present invention completed the present invention after repeated trial and error while researching and developing to solve the above problems.

Prior Patent Document 1: Republic of Korea Patent Publication No. 10-2015-0080408

Prior Patent Document 2: Republic of Korea Patent Publication No. 10-2010-0019617

The purpose of the present invention is to provide a solution that can completely isolate the space where the LPG fuel tank is located from the vehicle compartment even in vehicles where the vehicle compartment and trunk are not physically/structurally separated. The concept of “isolation” as understood and proposed by the inventor of the present invention does not simply mean blocking the fuel tank from view. As mentioned above, in addition to ensuring safety, it must be isolated to reduce various NVHs and at the same time make it simple and easy to manage the fuel tank.

Meanwhile, other unspecified purposes of the present invention will be additionally considered within the scope that can be easily inferred from the following detailed description and its effects.

The first aspect of the present invention to achieve the above task is a fuel tank isolation board for LPG vehicles, where a fuel tank with an inner tube-shaped fuel cylinder or disk-shaped fuel cylinder is installed in a vehicle where the cabin and trunk are not spatially isolated. A bulkhead is formed with an isolation board made of multiple layers in the shape of a square sheet to isolate the recessed fuel tank position in the trunk floor from above, and the isolation board is placed on the board support of the fuel tank position and the side wall brackets on both sides of the trunk, and each A hole for managing the gauge of the fuel tank and a fastening hole for fastening the board support and the isolation board with a fastener are formed at the same location for each layer, and the layer is composed of two or more layers of different materials to position the fuel tank. It is characterized by blocking noise generated from.

In addition, the second aspect of the present invention is a fuel tank isolation board for an LPG vehicle, which is composed of a plurality of layers in a square sheet shape, a sound insulation sheet layer on the fuel tank, a metal sheet layer on the sound insulation sheet layer, and a synthetic resin layer on the metal sheet layer. Trunk boards made of panels are stacked sequentially and fastened into one upper and lower assembly, and the four ends of the trunk board are bent downward to cover the edges of the remaining layers, and this LPG vehicle fuel tank isolation board is installed on the fuel tank. It is characterized by isolating the recessed fuel tank position in the center of the trunk floor from the top.

In a preferred embodiment, the sound insulation sheet layer is a double layer of a felt sheet and a resin sheet, and is preferably used to double block noise generated at the fuel tank position.

In addition, the third aspect of the present invention is a fuel tank isolation board for an LPG vehicle, which is a square sheet to isolate the recessed fuel tank position at the bottom of the vehicle trunk where the fuel tank, which is an inner tube-shaped fuel cylinder or a disk-shaped fuel cylinder, is installed from the top. It is an isolation board assembly made up of multiple layers of shape,

A trunk board made of a sound-insulating sheet layer over the fuel tank, a metal sheet layer over the sound-insulating sheet layer, and a synthetic resin panel positioned over the metal sheet layer and surrounding the remaining layers below are sequentially stacked to form an upper and lower assembly. It is placed on a board support at the fuel tank position, and is characterized in that a hole for managing the gauge of the fuel tank and a fastening hole for fastening the board support and the isolation board are formed at the same location in each layer.

According to the present invention as described above, it is particularly effective when manufacturing or converting an SUV vehicle in which the cabin and trunk are not spatially isolated into an LPG vehicle. In order to build an LPG fuel system in this type of vehicle, it is necessary to completely isolate the LPG fuel cylinder from the cabin. The isolation board of the present invention can completely physically isolate the fuel cylinder and at the same time effectively block noise or vibration generated from the fuel cylinder.

Additionally, it is designed to prevent various loads placed on the trunk carpet from being transmitted to the fuel cylinder. This load problem also affects the four board supports at the fuel tank position that support the board of the present invention, and the isolation board of the present invention sufficiently ensures stability so that the trunk load does not cause stability problems of the fuel cylinder.

Meanwhile, it is to be added that even if the effects are not explicitly mentioned herein, the effects described in the following specification and their potential effects expected from the technical features of the present invention are treated as if described in the specification of the present invention.

Figure 1 illustrates the configuration of the fuel tank position 10 of an LPG vehicle according to a preferred embodiment of the present invention.
Figure 2 shows an example of installation of the isolation board 100 according to a preferred embodiment of the present invention.
Figure 3 shows an example of installation of the isolation board 100 according to another preferred embodiment of the present invention.
Figure 4 is a diagram showing in detail the configuration of each part of the isolation board 100 assembly according to a preferred embodiment of the present invention.
FIG. 5 is a cross-sectional view schematically showing the isolation board 100 of FIG. 2 or FIG. 3 installed on the fuel tank position 10.
Figure 6 is a diagram showing an example of a cross-sectional configuration of an isolation board 100 according to a preferred embodiment of the present invention.
※ The attached drawings are intended as reference for understanding the technical idea of the present invention, and are not intended to limit the scope of the present invention.

Hereinafter, with reference to the drawings, we will look at the configuration of the present invention guided by various embodiments of the present invention and the effects resulting from the configuration. In describing the present invention, if it is determined that related known functions may unnecessarily obscure the gist of the present invention as they are obvious to those skilled in the art, the detailed description thereof will be omitted.

LPG fuel cylinders are installed in LPG vehicles. When a long cylindrical bomb (cylindrical bomb) of the type shown in the prior patent document 2 specification (FIGS. 3 and 8) is installed in the trunk, the space in the trunk becomes very narrow. However, the bigger problem lies in the isolation from the car compartment. In sedan-type vehicles, the cabin and trunk are structurally isolated, but in SUV-type vehicles, the cabin and trunk are not spatially isolated, so a long cylindrical cylinder cannot be used.

Meanwhile, a groove is formed on the floor of the vehicle's trunk room as a loading space for the spare tire. The applicant of the present invention has manufactured and sold LPG vehicles by installing an inner tube-shaped fuel cylinder in the spare tire groove. It was also DonutTM Bombay disclosed in Prior Patent Document 1. In Prior Patent Document 2, it was expressed as a “disk-shaped bombe” (Figure 10 of Prior Patent Document 2). However, even if the trunk loading space is not reduced by installing this inner tube-shaped fuel cylinder or disk-shaped fuel cylinder in the spare tire loading space, the problem of isolation between the vehicle compartment and the trunk still remains. In SUV-type vehicles, the trunk trim only visually conceals the fuel cylinder. Even if a fuel cylinder is installed in the spare tire loading space of this type of vehicle and covered with a trunk carpet, it is difficult to say that it is sufficiently isolated from the vehicle compartment.

In the present invention, this problem is solved through the detailed description below. First, let's call the recessed position in the trunk floor where the fuel tank is installed, which has been used as a loading space for the spare tire, the "fuel tank position." Figure 1 schematically illustrates the fuel tank position 10 in one preferred embodiment of the invention.

The fuel tank position 10, indicated by a dotted line, is installed in the trunk 2 of the vehicle 1. The fuel cylinder 11 is connected to and fixed to the vehicle body by four brackets 12. The isolation board of the present invention isolates the fuel tank position 10 where the fuel cylinder 11 is installed from above. Then, based on this fuel tank position (10), there is an apron (4) at the rear, an extension carpet (5) toward the cabin, and trim (3) on both sides (more specifically, on the left and right). It is blocked by the installed side wall bracket (hereinafter the same).

Here, two challenges emerge. First, excessive load should not be applied on the fuel cylinder (11). Even if the fuel tank position 10 is isolated from the top with an isolation board described later, it is not possible to simply cover the fuel cylinder 11 from above. Due to the nature of the trunk, a load of more than 100 kg is loaded, and the load is applied entirely to the fuel cylinder 11 through the isolation board, which is undesirable from the viewpoint of safety and stability. Second, the isolation board of the present invention securely seals the fuel tank position 10 from above using a fastening means, but a problem arises in which the state of the underside of the board cannot be easily seen. Also, as shown, the fuel cylinder 11 is equipped with a gauge 15 to check the fuel status as well as various configurations to smoothly supply fuel to the engine. Complete isolation of the fuel tank position (10) by the isolation board may also cause inconvenience in managing the gauge (15).

As a configuration to solve the first problem, a plurality of isolation board supports (13) were installed on the bomb bracket (12). An isolation board is placed on this board support (13) to prevent the trunk load from being directly transmitted to the fuel cylinder (11). In addition, as will be described later, both ends of the isolation board are placed on side wall brackets (not shown), and the front and rear ends are placed over the apron (4) and extension carpet (5), respectively, thereby maintaining the vehicle compartment and fuel tank position (10). It physically isolates and simultaneously prevents load transfer to the bomb.

2 and 3 show a rectangular isolation board 100 installed over the fuel tank position 10 as viewed from above, according to a preferred embodiment of the present invention. The isolation board 100 of the embodiment of FIG. 3 has watertight confirmation covers 191 and 191 added to the embodiment of FIG. 2.

As shown, the isolation board 100 is positioned over the fuel tank position and is surrounded on all sides by the vehicle trim 3, apron 4 and extension carpet 5 on both sides. It cannot be said that it is isolated with just the cover, and this will be discussed again later. However, as shown, the fuel tank position is physically blocked by the isolation board 10 and each trunk member of the automobile.

The isolation board 100 of the present invention is composed of an assembly in which a plurality of layers are stacked and combined. The uppermost first layer 110 shown in FIGS. 2 and 3 is a trunk board and is made of a synthetic resin panel. A fastening hole 113 penetrating the first layer 110 in the vertical direction is installed. By inserting a fastener into the fastening holes 113 (the fastener penetrates the fastening holes 123 and 133 respectively installed at corresponding positions of the layers 120 and 130 below), the board support 13 of FIG. 1 is formed. The isolation board 100 is installed over the fuel tank position by firmly inserting it into the hole formed in .

Then, a gauge management hole is formed at a position corresponding to the position where the gauge 15 of the fuel cylinder is located, and a gauge cover 190 is formed over this gauge management hole. By opening and closing the gauge cover 190, the second problem described above is solved.

The trunk itself is not completely square in shape. By installing side wall brackets (150 in FIG. 5) that form the left and right side walls of the fuel tank position, the fuel tank position 10 becomes an approximately square-shaped area. Then, a square-shaped isolation board 100 is installed on top of it, which creates a zone with a depth of approximately radial shape toward the rear of the vehicle among the areas on the left and right outside of the fuel tank position based on the side wall bracket. Side covers 198 having approximately the same height as the isolation board 100 are installed in these left and right areas.

Figure 4 shows the detailed configuration of an isolation board according to a preferred embodiment of the present invention, broken down into elements and parts of each assembly.

As shown, the isolation board consists of two or more square sheet-shaped layers. As described above, the first layer 110 is a panel made of synthetic resin and has four ends bent downward to surround the edges of the other layers 120 and 130.

Watertightness confirmation holes 117, 117 of the first layer 110, watertightness confirmation holes 127, 127 of the second layer 120, and watertightness confirmation holes 137, 137 of the third layer 130. may be formed at positions corresponding to each other, and therefore they may function as a single hole in the isolation board assembly. And watertight confirmation covers 191 and 191 are installed on the first layer 110. In another embodiment of the present invention, a watertightness confirmation hole and a watertightness confirmation cover may be installed only in the first layer 110. These watertight confirmation holes serve to check whether water flows into the isolation board when the car is washed or when the vehicle is flooded.

The gauge management hole 115 of the first layer 110, the gauge management hole 125 of the second layer 120, and the gauge management hole 135 of the third layer 130 are formed at positions corresponding to each other. , therefore they function like a single hole in the isolation board assembly. And the gauge cover 190 is installed on the first layer 110.

As mentioned above, the material of the first layer 110 may be a synthetic resin panel. A 3mm thick polypropylene material with a rigid design was used, but synthetic resins of various materials can also be used.

The material of the second layer 120 is a metal member. Preferably, a steel plate can be used. By adding a steel plate to the isolation board assembly, it is possible to not only improve the load carrying capacity for loads generated in the trunk, but at the same time effectively isolate the fuel tank position.

Although not shown, the configuration of interposing a sound-absorbing material sheet between the first layer 110 and the second layer 120 was more effective. Otherwise, noise generated in or passing through the steel plate would be transmitted upward, and the noise could be effectively blocked by the sound-absorbing material sheet. These sound absorbing material sheets include polyethylene terephthalate/aramid nonwoven sound absorbing material, polyethylene terephthalate needle punch nonwoven sound absorbing material, aramid nonwoven sound absorbing material, nonwoven sound absorbing material obtained by mixing Kevlar short fibers and polyethylene terephthalate short fibers, and polypropylene. A non-woven sound-absorbing material of the meltbron type mixed with polyethylene terephthalate can be used.

Various noises occur in fuel tanks. The resonance sound generated from the fuel tank radiates in various directions and is transmitted into the cabin through various members and parts of the vehicle. In particular, stronger measures are needed for SUV-type vehicles where the cabin and trunk are not completely separated physically.

The material for the third layer 130 of the present invention is a sound absorbing and insulating sheet. Preferably, it is composed of double layers of materials with different sound absorption and insulation properties. For example, resin sheets such as ethylene vinyl copolymer (EVA), synthetic rubber, and polyurethane sheets, known as strong sound insulating materials, are used as the first sound absorbing and insulating material, and felt sheet is used as the second sound absorbing and insulating material underneath. Preferably, a felt containing polyethylene terephthalate fibers can be used.

Vibration and noise occurring at the fuel tank position can be sound absorbed and insulated by the isolation board of the present invention. First, the felt sheet and resin sheet of the third layer 130 absorb and block noise. Next, the steel plate of the second layer 120 and the polypropylene panel of the first layer 110 block noise. In addition, the sound-absorbing material sheet is interposed between the layers to prevent noise generated from the fuel cylinder from being further transmitted to the vehicle compartment.

After aligning the three layers in FIG. 4 up and down, the sheets of each layer can be integrated into one assembly by tightening the nuts 160 from the bottom to the top of the third layer 130 according to the determined position of the isolation board. there is. Although not shown, a number of studs are attached to the steel plate, and the isolation board assembly is completed by fastening nuts 160 to each of them.

Figure 5 schematically shows in cross section the isolation board 100 of the present invention installed over the fuel tank position 10. The fastener 180 is inserted into the fastener hole 113 penetrating the isolation board 100 assembly to install the isolation board 100 on the board support 13 at the fuel tank position 10. Side wall brackets 150 are installed below the vehicle trim on both left and right sides of the isolation board 100, and both left and right ends of the isolation board 100 are positioned over the side wall brackets 150 in the front and rear longitudinal directions. By installing and positioning the isolation board 100 above the fuel tank position 10, the fuel cylinder 11 floating on the bottom of the vehicle body 9 is effectively isolated, and the resonance sound or noise generated from the fuel cylinder 11 is effectively isolated. is absorbed and blocked by the layers laminated with different materials constituting the isolation board 100.

Meanwhile, it is best to add non-woven fabric to both left and right ends of the isolation board 100 to prevent noise from leaking from the contact area with the side wall bracket 150.

Figure 6 shows an example of a cross section of the isolation board 100 of the present invention. Although the expression is somewhat exaggerated for convenience of explanation, the scope of protection of the present invention is not limited by the thickness and adhesion of each layer.

Each layer that is stacked up and down to form the assembly of the isolation board 100 is, from the top, a trunk board 110, a steel plate 120, and a sound insulation sheet 130, and the sound insulation sheet 130 is preferably made of resin. It is composed of a sheet 131 and a felt sheet 132, so it can double block noise. Additionally, by interposing a sound-absorbing material sheet between the trunk board 110 and the steel plate 120, noise radiating from the steel plate 120 can be further blocked.

The isolation board 100 is installed at the fuel tank position 10 and then the trunk carpet 19 is covered over it. Velcro adhesive can be used to regulate movement so that the trunk carpet 19 does not move carelessly on the isolation board 100. To check the gauge of the fuel cylinder 11, first open the trunk carpet 19, and then open the gauge cover 190 formed on the isolation board 100. Then, you can check the bomb gauge through the gauge management hole.

The scope of protection of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is to be added once again that the scope of protection of the present invention may not be limited due to changes or substitutions that are obvious in the technical field to which the present invention pertains.

Claims (4)

Isolation made up of multiple layers in the shape of a square sheet to isolate the recessed fuel tank position at the bottom of the trunk, where the fuel tank, which is an inner tube-shaped fuel cylinder or a disk-shaped fuel cylinder, is installed in a vehicle where the cabin and the trunk are not spatially isolated. A partition is formed with a board, and the isolation board is placed on the board support at the fuel tank position and the side wall brackets on both sides of the trunk, and the hole for managing the gauge of the fuel tank is located at the same location for each layer, the board support and the isolation board. A fastening hole for fastening with a fastener is formed, and the layer is composed of two or more layers of different materials to block noise generated at the fuel tank position. A fuel tank isolation board for an LPG vehicle.
A fuel tank isolation board for an LPG vehicle, which is composed of multiple layers in the shape of a square sheet, with a sound insulation sheet layer over the fuel tank, a metal sheet layer over the sound insulation sheet layer, and a trunk board made of a synthetic resin panel over the metal sheet layer. The trunk board is fastened into one upper and lower assembly, and the four ends of the trunk board are bent downward to cover the edges of the remaining layers, and this LPG vehicle fuel tank isolation board is a fuel tank in the depression in the center of the trunk floor where the fuel tank is installed. Fuel tank isolation board for LPG vehicles, characterized in that it isolates the tank position from above.
According to paragraph 2,
The sound insulation sheet layer is a double layer of felt sheet and resin sheet, and double blocks noise generated at the fuel tank position. A fuel tank isolation board for an LPG vehicle.
It is an isolation board assembly made up of multiple layers in the shape of a square sheet to isolate the recessed fuel tank position in the bottom of the vehicle trunk where the fuel tank, which is an inner tube-shaped fuel cylinder or a disk-shaped fuel cylinder, is installed from the top,
A trunk board made of a sound-insulating sheet layer over the fuel tank, a metal sheet layer over the sound-insulating sheet layer, and a synthetic resin panel positioned over the metal sheet layer and surrounding the remaining layers below are sequentially stacked to form an upper and lower assembly. An LPG fuel tank isolation board assembly is placed on a board support at the fuel tank position, and has a hole for managing the gauge of the fuel tank at the same location in each layer and a fastening hole for fastening the board support and the isolation board with a fastener.

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