JP2005212729A - Vehicle mounting structure of fuel container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the ground clearance of a vehicle from being lowered than desired height while increasing a space in a cabin. <P>SOLUTION: A hydrogen tank 14A having a relatively larger diameter of two hydrogen tanks 14A, 14B having different diameters is arranged below the femur support part 141a of a rear side seat 140 and the hydrogen tank 14B having the relatively smaller diameter is arranged below the buttocks support part 141b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle mounting structure for a fuel container.

Conventionally, for example, a vehicle that travels with a gaseous fuel such as natural gas is known.
In such a vehicle, when two large-diameter cylinders and small-diameter cylinders having different sizes are mounted as cylindrical cylinders for accommodating pressurized fuel, the small-diameter cylinder is arranged at the lower part of the rear seat, and the large-diameter cylinder is A vehicle is known that is disposed on the luggage compartment side at the rear of the rear seat (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2000-21950

By the way, in the vehicle according to the above prior art, when the fuel container is disposed below the vehicle body floor, the space required for mounting the fuel container is reduced, and the vehicle interior space including the cargo space is increased, while It is desired to secure a predetermined ground clearance.
The present invention has been made in view of the above circumstances, and provides a vehicle mounting structure for a fuel container capable of preventing the ground clearance of a vehicle from being lowered below a desired height while increasing the interior space of the vehicle. The purpose is to provide.

  In order to solve the above problems and achieve the object, the fuel container mounting structure of the present invention according to claim 1 is a vehicle body below a seat (for example, a rear seat 140 in an embodiment described later). The floor (for example, the rear floor 102 in the embodiment described later) is set along the lower surface of the thigh support portion (for example, the thigh support portion 141a in the embodiment described later) of the seat on the front side of the vehicle. A floor projecting portion having a projecting shape (for example, a rear floor projecting portion 102a in an embodiment described later), and a lower surface of a collar support portion of the seat (for example, a collar support portion 141b in an embodiment described later) on the vehicle rear side. And a floor recess (for example, a rear floor recess 102b in an embodiment described later) having a shape recessed downward from the floor protrusion. Of the two fuel containers having different diameters (for example, hydrogen tanks 14A and 14B in the embodiments described later), a fuel container having a relatively large diameter (for example, the hydrogen tank 14A in the embodiments described later) is A fuel container having a relatively small diameter (for example, a hydrogen tank 14B in an embodiment to be described later) is disposed in the vicinity of a position below the floor protrusion, and is rearward in the vehicle front-rear direction than the relatively large diameter fuel container. It is arranged near the position below the floor recess, and the ground height at the lower ends of the two fuel containers is set to an equivalent height.

According to the vehicle-mounted structure of the fuel container having the above configuration, a desired vehicle interior space can be secured by arranging the fuel container below the vehicle body floor at a position below the seat where it is relatively easy to secure the accommodation space in the vehicle interior. However, it is possible to prevent the ground height of the fuel container from lowering than a desired height.
Moreover, of the two fuel containers having different diameters, the fuel container having a relatively large diameter is disposed below the thigh support portion of the seat, and the fuel container having a relatively small diameter is disposed below the buttocks support portion. By doing so, the fuel container can be efficiently arranged in the space below the seat. As a result, the fuel container can be prevented from projecting rearward of the seat, the vehicle interior space including the cargo space can be increased, and the degree of freedom in designing the rear portion of the vehicle body can be increased.

  Furthermore, in the vehicle container mounting structure of the fuel container according to the second aspect of the present invention, a vehicle body frame (for example, floor frames 105 and 106 in the embodiments described later) extends in the vehicle front-rear direction at the lower ends of the two fuel containers. It is characterized by being set at a position above the lower end.

  According to the vehicle container mounting structure of the fuel container having the above configuration, the fuel container can be prevented from projecting downward from the lower end of the vehicle body frame, and the fuel container can be protected from obstacles on the road surface by the vehicle body frame. .

According to the vehicle mounting structure of the fuel container of the present invention, the vehicle interior space including the cargo space can be increased, the degree of freedom in designing the rear part of the vehicle body can be increased, and the ground clearance of the fuel container can be made higher than the desired height. Can also be prevented.
Furthermore, according to the vehicle container mounting structure of the fuel container of the present invention described in claim 2, the fuel container is prevented from projecting downward from the lower end of the vehicle body frame, and the fuel container is removed from an obstacle on the road surface. It can be protected by the body frame.

Hereinafter, a vehicle mounting structure for a fuel container according to an embodiment of the present invention will be described with reference to the accompanying drawings.
The fuel container according to the present embodiment is mounted on, for example, a fuel cell vehicle including a fuel cell as a power source of the vehicle, and is filled with hydrogen gas as fuel for the fuel cell.
This fuel cell includes a fuel cell (not shown) in which an electrolyte electrode structure in which a solid polymer electrolyte membrane made of, for example, a cation exchange membrane is sandwiched between a fuel electrode and an oxygen electrode is further sandwiched between a pair of separators. A large number of sets are stacked.
Then, hydrogen is supplied as fuel gas to the fuel electrode of the fuel cell from an inlet side pipe connected to the fuel container, and this hydrogen is ionized on the catalyst electrode of the fuel electrode and is appropriately humidified solid polymer electrolyte membrane Electrons generated in the meantime, moving to the oxygen electrode via, are taken out to an external circuit and used as direct current electric energy. For example, since an oxidant gas such as oxygen or air is supplied to the oxygen electrode via the inlet side pipe, hydrogen ions, electrons and oxygen react with each other to generate water. Then, the so-called off-gas that has reacted is discharged from the outlet side piping on both the fuel electrode side and the oxygen electrode side.

For example, as shown in FIGS. 1 to 3, a rear floor 102 that is stepped and formed so as to rise rearward is joined to the rear edge of the front floor 101 that forms the vehicle body floor. A cross member 104 that forms a vehicle body skeleton is joined to the back side of the stepped portion 103 of the rear floor 102. To the lower surface of the front floor 101, floor frames 105 and 106 that form vehicle body skeleton portions are connected to the left and right along the vehicle length direction toward the outside.
Inside sills 107 and 108 are respectively connected to both side edges of the front floor 101, and inside sill extensions 109 and 110 are provided at rear ends of the inside sills 107 and 108. The inside sills 107 and 108 are members that are joined to an outside sill (not shown) to form a vehicle body skeleton.

Front brackets 111 and 112 are joined to the inner side surfaces of the respective inside tensions 109 and 110, respectively.
The front brackets 111 and 112 are joined to the lower surface of the rear floor 102 and are joined to the rear frames 113 and 114, which are members forming the vehicle body skeleton, and the lower surface of the cross member 104 and the floor frames 105 and 106. 114 are connected to the inside sills 107 and 108 and the floor frames 105 and 106 via front brackets 111 and 112, respectively.

Rear brackets 117 and 118 are attached to the lower surfaces of the rear end portions of the rear frames 113 and 114, respectively.
Here, two cross members 104A and 104B are joined between the left and right rear frames 113 and 114, and a bumper beam 121 is attached to each rear end, specifically, the rear brackets 117 and 118, respectively.

And the sub-frame 122 is being fixed to each color nut 115,116,119,120 provided in the front bracket 111,112 and the rear bracket 117,118 from the downward | lower direction with the volt | bolt 123,123,123,123.
As shown in FIG. 3, the sub-frame 122 is a member formed in a rectangular frame shape by left and right frame members 124 and 125 and front and rear frame members 126 and 127, and includes a cross beam 128 in the vehicle width direction. Two hydrogen tanks 14A and 14B having different diameters as the hydrogen tank 14 are fastened and fixed by bands 131 and 132, respectively, in the space allocated by 128. A suspension unit 133 is attached to the subframe 122.
And the insertion part 134,135 of the volt | bolt 123 inserted in the said collar nut 115,116 is provided in the corner | angular part of the front end of the left and right frame members 124,125 and the both ends of the front frame member 126, and left and right Insertion portions 136 and 137 for bolts 123 to be inserted into the collar nuts 119 and 120 are provided at corners between the rear ends of the frame members 124 and 125 and both ends of the rear frame member 127.
Then, a bolt 123 is inserted into each insertion portion 134, 135, 136, 137 of the subframe 122, and the bolt 123 is attached to the front brackets 111, 112 and the rear brackets 117, 118 of the rear frames 113, 114. The sub-frame 122 is fixed to the rear frames 113 and 114 by being inserted into the nuts 115, 116, 119 and 120 and fastened and fixed.

Here, the rear floor 102 includes a rear floor protrusion 102a and a rear floor recess 102b having a shape along the lower surface 141A of the seat 141 of the rear seat 140 below the rear seat 140. That is, the seat portion 141 of the rear seat 140 has a lower surface 141A that is inclined downward from the front thigh support portion 141a toward the rear hip support portion 141b. The rear floor 102 below the rear seat 140 extends along the rear floor protruding portion 102a protruding along the lower surface of the thigh support portion 141a on the front side, and along the lower surface of the buttocks support portion 141b on the rear side. Thus, a rear floor recess 102b that is recessed downward from the rear floor protrusion 102a is smoothly connected.
A hydrogen tank 14A having a relatively large diameter is disposed at a position below the rear floor protrusion 102a, and a diameter is relatively at a position behind the hydrogen tank 14A and below the rear floor recess 102b. A small hydrogen tank 14B is arranged, and each hydrogen tank 14A, 14B is arranged inside the left and right rear frames 113, 114.
The ground heights at the lower ends of the hydrogen tanks 14A and 14B are set to be equal to the height h, and are set to be higher than the ground heights at the lower ends of the floor frames 105 and 106.

  A fuel cell box 150 that accommodates and fixes the fuel cell and various auxiliary units (for example, a humidifier) of the fuel cell is sandwiched from both sides by the left and right floor frames 105 and 106 below the front floor 101. It is arranged like that.

As described above, according to the fuel container mounting structure of the fuel container according to the present embodiment, the hydrogen tanks 14A, By arranging 14B, it is possible to prevent the ground height of each of the hydrogen tanks 14A and 14B from being lower than the desired height while securing the desired vehicle interior space.
Moreover, of the two hydrogen tanks 14A and 14B having different diameters, the hydrogen tank 14A having a relatively large diameter is disposed below the thigh support portion 141a of the rear seat 140, and the hydrogen tank having a relatively small diameter. By disposing 14B below the flange support portion 141b, the hydrogen tanks 14A and 14B can be efficiently disposed in the space below the rear seat 140. Accordingly, the hydrogen tanks 14A and 14B can be prevented from protruding rearward from the rear seat 140, the vehicle interior space including the cargo space can be increased, and the degree of freedom in designing the rear portion of the vehicle body can be increased. it can.
Moreover, the hydrogen tanks 14A and 14B are prevented from projecting downward from the lower ends of the floor frames 105 and 106, and the hydrogen tanks 14A and 14B are protected from obstacles on the road surface by the floor frames 105 and 106. be able to.
Further, since the hydrogen tanks 14A and 14B are disposed inside the rear frames 113 and 114, the hydrogen tanks 14A and 14B can be protected from the obstacles and the like from the side of the vehicle by the rear frames 113 and 114. it can.

In the above-described embodiment, two hydrogen tanks 14A and 14B having different diameters are mounted as the hydrogen tank 14. However, the present invention is not limited to this. For example, a modification of the above-described embodiment shown in FIGS. As an example, three or more, for example, four hydrogen tanks 14A, 14B, 14C, and 14D may be mounted. In this modification, the three hydrogen tanks 14B, 14C, and 14D have the same diameter, and are formed to have a relatively smaller diameter than the hydrogen tank 14A.
The hydrogen tank 14A having a relatively large diameter is disposed below the thigh support portion 141a of the rear seat 140, and the hydrogen tank 14B having a relatively small diameter is larger than the hydrogen tank 14A having a relatively large diameter. Is located at the rear of the vehicle in the front-rear direction and below the flange support part 141b. The hydrogen tank 14C is disposed below the rear floor 102 at a position rearward of the hydrogen tank 14B and the hydrogen tank 14D is disposed at the rear floor 102. Below the hydrogen tank 14C and at a position rearward in the vehicle longitudinal direction.
The ground heights at the lower ends of the hydrogen tanks 14A, 14B, 14C, and 14D are set to be the same height h, and are set to be higher than the ground heights at the lower ends of the floor frames 105 and 106. Has been.

It is a side view which shows the principal part of the vehicle mounting structure of the fuel container which concerns on one Embodiment of this invention. It is a top view which shows the principal part of the vehicle mounting structure of the fuel container which concerns on one Embodiment of this invention. It is a principal part disassembled perspective view of the vehicle mounting structure of the fuel container shown in FIG. It is a side view which shows the principal part of the vehicle mounting structure of the fuel container which concerns on the modification of this embodiment. It is a top view which shows the principal part of the vehicle mounting structure of the fuel container which concerns on the modification of this embodiment.

Explanation of symbols

14A, 14B Hydrogen tank (fuel container)
102 Rear floor (body floor)
102a Rear floor protrusion (floor protrusion)
102b Rear floor recess (floor recess)
105, 106 Floor frame (body frame)
140 Rear seat (seat)
141a thigh support part 141b buttocks support part

Claims (2)

A floor projecting portion having a shape that projects a vehicle body floor below the seat along the lower surface of the thigh support portion of the seat on the vehicle front side, and a lower surface of the buttocks support portion of the seat on the vehicle rear side. And a floor recess having a shape that is recessed downward from the floor protrusion,
Of the two fuel containers having different diameters, a fuel container having a relatively large diameter is disposed in the vicinity of a position below the floor protrusion, and a fuel container having a relatively small diameter is disposed on the fuel container having a relatively large diameter. Than the vehicle front-rear direction rear and near the position below the floor recess,
A fuel container mounting structure for a fuel container, wherein the ground height at the lower ends of the two fuel containers is set to an equivalent height. The fuel container mounting structure for a fuel container according to claim 1, wherein the lower ends of the two fuel containers are set at a position above the lower end of a vehicle body frame extending in the vehicle longitudinal direction.

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