JP4529487B2 - Vehicle fuel tank support structure - Google Patents

Description

  The present invention provides a fuel tank for a vehicle in which a tunnel portion protruding upward toward the vehicle interior side is provided at the center in the vehicle width direction of the floor panel, and the fuel tank is disposed in the inner space of the tunnel portion. It relates to the support structure.

Conventionally, as a fuel tank support structure for a vehicle in the above-described example, there is the following.
In other words, a tunnel portion projecting upward toward the vehicle interior side is provided at the center in the vehicle width direction of the floor panel that forms the lower surface of the vehicle interior, and the tunnel portion between the driver seat and the passenger seat is further expanded upward. A central bulge is formed to form a side bulge by bulging upward the floor panel at the lower part of the seat cushion of the driver's seat and the passenger's seat. A fuel tank is disposed so as to extend in the vehicle width direction and extend in the vehicle width direction outside the center bulging portion and the left and right side bulging portions described above (see Patent Document 1). .

  In this conventional structure, the fuel tank can be arranged by effectively using the dead space below the front seat (driver's seat and front passenger seat), so that a large living space can be secured even for a compact vehicle. While there is an advantage that can be done, since the fuel tank extends in the vehicle width direction, it is disadvantageous in a side collision.

  In addition, a rear floor frame extending in the vehicle width direction is provided at the rear portion of the fuel tank, while a cross member portion extending in the vehicle width direction and two beam portions extending rearward from the cross member portion The cross member portion of the sub frame is positioned at the front portion of the fuel tank, and the rear end of the beam portion is fastened to the rear floor frame. Since the structure supports the tank, the number of parts required to support the tank increases, and the fuel tank support structure becomes complicated.

On the other hand, another structure of a conventional fuel tank support structure for a vehicle includes the following structure.
In other words, a tunnel part is provided at the center in the vehicle width direction of the floor panel that forms the lower surface of the passenger compartment and projects upward toward the passenger compartment side, and the lower part of the tunnel part is covered with the floor panel so as to be substantially flush with the floor panel. A member is provided, and a fuel tank extending in the front-rear direction of the vehicle is disposed between the cover member and the tunnel portion (see Patent Document 2).

In this conventional structure, the fuel tank is disposed inside the tunnel portion so that it does not protrude below the floor panel. Therefore, in order to secure the tank capacity, the height of the tunnel portion in the vertical direction is high. Since the size of the part increases, it is difficult to walk through in the vehicle width direction, which is not suitable for a compact car.
JP 2000-85382 A Japanese Utility Model Publication No.59-78131

  Accordingly, the present invention provides a cross member extending in the vehicle width direction across the tunnel portion at the lower portion of the floor panel, and lowering the floor panel by supporting the fuel tank with respect to the cross member, thereby reducing the comfortability. The vehicle can directly improve the fuel tank, support the fuel tank directly with the cross member, reduce the number of parts required to support the tank, and ensure the vehicle body rigidity and the tank support rigidity with a simple structure. An object of the present invention is to provide a fuel tank support structure.

In the fuel tank support structure for a vehicle according to the present invention, a tunnel portion projecting upward toward the vehicle interior side is provided at the vehicle width direction central portion of the floor panel forming the vehicle compartment lower surface, and the tunnel below the floor panel is provided. A fuel tank support structure for a passenger compartment in which a fuel tank is disposed in the interior space, and a cross member extending in the vehicle width direction across the tunnel portion is spaced apart in the vehicle front-rear direction at the lower portion of the floor panel And the cross member supports the fuel tank at a predetermined interval in the front-rear direction, and side sills extending in the front-rear direction of the vehicle are provided at both ends in the vehicle width direction of the floor panel. Both ends of the cross member in the vehicle width direction are connected to the side sills, and the tunnel portion has a front portion having a large width in the vehicle width direction and a rear portion having a narrow width in the vehicle width direction compared to the front portion. When The fuel tank is formed in a shape in the vehicle width direction corresponding to the tunnel portion, and the cross member is disposed corresponding to at least a front portion having a large width in the vehicle width direction of the tunnel portion. A front seat and a rear seat disposed behind the front seat are provided in the vehicle interior, and the front seat is disposed above the front portion having a large width in the vehicle width direction of the tunnel portion. On the other hand, the rear seat is disposed above the slim portion having a smaller width in the vehicle width direction than the rear portion having a narrow width in the vehicle width direction of the tunnel portion, and the width in the vehicle width direction of the tunnel portion. The large front part extends to a position overlapping with the front seat in the width direction of the vehicle in plan view, and the fuel tank disposed in the tunnel portion extends to a position overlapping with the front seat in the width direction of the vehicle in plan view. The cross member is the front seat In which is disposed at a position that overlaps in plan view the front-rear direction downwardly.
The cross member described above is preferably a member having a closed cross-sectional structure.

According to the above configuration, since the cross member is provided at the lower part of the floor panel, the floor panel can be lowered, thereby improving the comfortability.
In addition, since the above-described fuel tank is directly supported by the cross member, the number of parts required for tank support can be reduced, and the vehicle body rigidity and the tank support rigidity can be ensured with a simple structure.
Furthermore, since the cross member described above can extend straight in the vehicle width direction across the tunnel portion, high vehicle body rigidity can be ensured.

Further, since the side sill is responsible for the support rigidity of the fuel tank, the tank support rigidity is further improved, and it is advantageous for a side impact load.

Furthermore, even if the fuel tank is formed long in the front-rear direction of the vehicle, the fuel tank is directly supported by the plurality of cross members, so that the fuel tank can be stably supported.

Further, the shape of the tunnel portion and the fuel tank described above can ensure the tank capacity while reducing the vertical height of the fuel tank as much as possible, and ensure the comfort in the vertical direction in the passenger compartment. Can be achieved. In other words, it is possible to achieve both the tank capacity and the habitability.

Furthermore, when the width of the tunnel portion in the vehicle width direction is large, it generally tends to be disadvantageous against side collision, but since a cross member is provided corresponding to this part, the vehicle body rigidity against side collision is improved, It is advantageous for side collision and can improve safety.

In one embodiment of the present invention, an exhaust pipe is disposed on the side of the fuel tank so as to extend in the front-rear direction of the vehicle, and the cross member in the vehicle width direction intermediate portion interferes with the exhaust pipe. The recessed part to avoid is formed.
According to the above configuration, since the above-described recess avoids interference with the exhaust pipe, it is possible to achieve both the arrangement of the cross member and the arrangement of the exhaust pipe.

In one embodiment of the present invention, a recess extending in the vehicle width direction is formed in the cross member disposition portion below the fuel tank, and the cross member is located in the recess and linearly extends in the vehicle width direction. It is arranged.
According to the above configuration, since the cross member is arranged linearly, the rigidity of the vehicle body is further improved, which is advantageous for side collision, and the rigidity of the fuel tank itself is increased by forming the recess, so that the tank The rigidity can be improved.

In one embodiment of the present invention, both ends of the cross member in the vehicle width direction are detachably connected to the side sill.
According to the above configuration, it is possible to improve the maintainability of the fuel tank.

According to the present invention, the cross member extending in the vehicle width direction across the tunnel portion is provided at the lower portion of the floor panel, and the fuel tank is supported by the cross member. In addition, the fuel tank can be directly supported by the cross member to reduce the number of parts required to support the tank, and the vehicle body rigidity and tank support rigidity can be ensured while having a simple structure. There is.

The floor panel is lowered to improve comfortability, and the fuel tank is directly supported by the cross member to reduce the number of parts required to support the tank, ensuring the vehicle body rigidity and tank support rigidity with a simple structure. purposes, apart the lower floor panel spaced a cross member which extends in the vehicle width direction across the tunnel portion in the longitudinal direction of the vehicle plurality Rutotomoni, a predetermined distance back and forth relative to the cross member that A side sill extending in the vehicle front-rear direction is provided at both ends in the vehicle width direction of the floor panel so as to support the fuel tank, and both ends in the vehicle width direction of the cross member are connected to the side sill, The tunnel portion includes a front portion having a large width in the vehicle width direction and a rear portion having a narrow width in the vehicle width direction as compared with the front portion, and the fuel tank is in the vehicle width direction corresponding to the tunnel portion. The cross member is formed in a shape corresponding to at least a front portion of the tunnel portion having a large width in the vehicle width direction. A front seat and a rear portion of the front seat are disposed in the vehicle interior. And the rear seat is disposed above the front portion having a large width in the vehicle width direction of the tunnel portion, while the rear seat is disposed in the vehicle width direction of the tunnel portion. It is arranged above the slim part having a smaller width in the vehicle width direction than the narrow rear part, and the front part having a large width in the vehicle width direction of the tunnel part is in the vehicle width direction in plan view and the front seat. The fuel tank disposed in the tunnel portion extends to a position where it overlaps with the front seat in the width direction of the vehicle in plan view, and the cross member extends in the front-rear direction in plan view below the front seat. the arrangement is arranged at a position overlapping with It was realized.

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawings show a fuel tank support structure of a vehicle. In FIGS. 1, 2 and 3, a dash lower panel (dash panel) 3 for partitioning the engine room 1 and the vehicle compartment 2 in the front-rear direction is provided, and the lower end of the dash lower panel 3 is provided. The floor panel 4 which forms the lower surface of the compartment 2 is connected to the part.

  The floor panel 4 described above extends substantially horizontally from the front to the rear, and a rear floor panel 6 is integrally connected to the rear end of the floor panel 4 via a kick-up portion 5. A spare tire pan 7 is stepped down at the center.

  A tunnel portion 8 that protrudes upward toward the inside of the passenger compartment 2 is provided at the center in the vehicle width direction of the floor panel 4 described above.

  As shown in FIGS. 3 and 4, the tunnel portion 8 extends in the vehicle front-rear direction from the dash lower panel 3 toward the kick-up portion 5, and has a wide portion 8a having a large width in the vehicle width direction at the front portion. A narrow portion 8c having a narrow width in the vehicle width direction is provided at the rear portion of the wide portion 8a via an inclined portion 8b that is narrow toward the rear, and the vehicle width is further wider than the narrow portion 8c. A slim portion 8d having a small width in the direction is formed.

Further, an inclined portion 8e whose width in the vehicle width direction becomes narrower toward the front and a slim portion 8f extending forward toward the dash lower panel 3 are formed at the front portion of the wide portion 8a.
And the front seats 9, 9 as the front seats are disposed above the wide portion 8a having a large width in the vehicle width direction of the tunnel portion 8 described above, while the slim portion having a narrow width in the vehicle width direction of the tunnel portion 8 is provided. Rear seats 10 and 10 as rear seats are disposed above the rear portion of 8d, and a plurality of rows of seats 9 and 10 are disposed in the front and rear of the passenger compartment 2.

  Here, as shown in FIGS. 1, 2, and 4, the above-described front seat 9 includes a seat cushion 11, a seat back 12, and a headrest 13, and the rear seat 10 similarly has a seat cushion 14, a seat, and the like. It has a back 15 and a headrest 16.

  Sides of the narrow portion 8c and the slim portion 8d of the tunnel portion 8 described above are set as leg space of the rear seat occupant Y (see FIG. 2) seated on the rear seat 10. In particular, in this embodiment, as shown in FIG. 2, the space between the side of the narrow portion 8c of the tunnel portion 8, the upper surface of the floor panel 4, and the lower portion of the seat cushion 11 in the front seat 9 is the rear seat occupant Y. (See FIG. 2).

Further, the side portions of the inclined portion 8e and the slim portion 8f are formed in the leg space of the front seat occupant X (see FIG. 2).
As shown in FIGS. 1 and 4, a pair of left and right front side frames 17 and 17 (front frames) are provided as vehicle body rigid members extending forward from the dash lower panel 3 on both sides in the engine room 1. Front side frames 17, 17 are provided rearward along the front surface of the dash lower panel 3, and a floor frame 18 is integrally or integrally attached to an end portion of the front side frame 17.

  The above-described floor frame 18 is a vehicle body rigid member that extends in a straight line in the vehicle front-rear direction along the upper surface of the floor panel 4 as shown in FIG. 3, and the same between the floor frame 18 and the floor panel 4 is the same. A closed section 19 extending in the direction is formed.

  Further, side sills 20 extending in the front-rear direction of the vehicle are provided at both left and right ends of the floor panel 4. The side sill 20 is a vehicle body rigid member formed by joining a side sill inner 21, a side sill reinforcement 22, and a side sill outer 23 as shown in FIGS. 6, 7, and 8, and the side sill inner 21 and the side sill outer 23 are joined together. A side sill closed section 24 extending in the front-rear direction of the vehicle is formed between the front and rear sides 23.

  Here, as shown in FIG. 1, the above-mentioned floor frame 18 is provided between the side sill 20 and the tunnel portion 8 so as to extend in the front-rear direction of the vehicle along the upper surface of the floor panel 4, and is viewed from a plane. An exhaust pipe 26 serving as an exhaust passage for exhausting the exhaust gas of the engine 25 to the rear of the vehicle is disposed at a position corresponding to between the floor frame 18 and the tunnel portion 8 and below the floor panel 4. .

As shown in FIGS. 1 and 2, a pre-silencer 27 is interposed in the middle of the exhaust pipe 26 described above, and a main silencer 28 is attached to the rear end of the exhaust pipe 26.
As shown in FIGS. 1, 2, and 3, side sill inners 21 in the left and right side sills 20, 20 cross the tunnel portion 8 at the lower portion of the floor panel 4 corresponding to the wide portion 8 a of the tunnel portion 8. A cross member 30 (so-called No. 2 cross member) as a vehicle body rigid member extending in the vehicle width direction up to 21 is provided.

  At a position separated from the cross member 30 in the longitudinal direction of the vehicle, more specifically at a position corresponding to the narrow portion 8c of the tunnel portion 8, the side sill inners 21, A cross member 31 (so-called No. 2.5 cross member) as a vehicle body rigid member extending in the vehicle width direction up to 21 is provided.

  As shown in FIGS. 1 and 2, a cross member 32 (so-called No. 3 cross member) extending in the vehicle width direction is attached to the rear surface of the kick-up portion 5 on the rear end side of the side sill 20, and the kick-up portion 5 The rear side frames 33 and 33 are attached to the lower surface left and right of the rear floor panel 6, and the cross member (so-called No. 4 cross member) is connected to the front lower surface of the rear floor panel 6 between the left and right rear side frames 33 and 33 in the vehicle width direction. 34 is attached. The cross members 32 and 34 and the rear side frame 33 described above are all vehicle body rigid members.

  Further, as shown in FIG. 1, a pair of left and right rear floor frames 35, 35 are attached to the lower surface of the floor panel 4. The rear floor frame 35 is a vehicle body rigid member that extends in the front-rear direction of the vehicle in the front-rear direction and extends between the side sills 20 and the floor frame 18 in the vehicle width direction.

In the figure, 36 is a front wheel, 37 is a rear wheel, and 38 is an instrument panel.
FIG. 5 shows a fuel tank 40 disposed in a space in the tunnel portion 8 below the floor panel 4, and the fuel tank 40 is formed so as to correspond to the shape of the tunnel portion 8.

  That is, as shown in the figure, the fuel tank 40 is formed with a wide portion 40a having a large width in the vehicle width direction at a front portion thereof, and an inclined portion that becomes narrow toward the rear at the rear portion of the wide portion 40a. A narrow portion 40c having a narrow width in the vehicle width direction and a slim portion 40d having a smaller width in the vehicle width direction than the narrow portion 40c are formed via 40b.

  Further, an inclined portion 40e whose width in the vehicle width direction becomes narrower toward the front and a slim portion 40f extending forward by a predetermined amount are formed at the front portion of the wide portion 40a. By configuring the fuel tank 40 in such a shape, it is configured to ensure the tank capacity while setting the overall height of the tank as low as possible.

  And the fuel tank 40 of such a shape is arrange | positioned in the space in the tunnel part 8 below the floor panel 4, as shown in FIGS. In this case, the upper half 40U (see FIG. 5) is located in the tunnel portion 8 on the upper side of the fuel tank 40, and the lower part 40L (see FIG. 5) is located on the outside of the vehicle below the lower surface of the floor panel 4. It is arranged to do.

  In addition, as shown in FIG. 5, a recess 41 is formed in the vehicle width direction in the wide portion 40a at the lower portion of the fuel tank 40 corresponding to the portion where the cross member 30 having a closed cross-sectional structure is disposed. In the lower portion of the tank 40, the narrow portion 40 c extends in the vehicle width direction corresponding to the disposition portion of another cross member 31 that is provided apart from the cross member 30 in the vehicle front-rear direction. A recess 42 is formed.

Next, with reference to FIGS. 6 to 9, the support structure for the fuel tank 40 will be described.
6 is a cross-sectional view taken along line AA in FIG. 1, FIG. 7 is a cross-sectional view taken along line BB in FIG. 1, FIG. 8 is a partially enlarged view of FIG. is there.
As shown in FIGS. 6, 8, and 9, joint pieces 30 a,
The left and right joining pieces 30a and 30a are detachably connected to the side sill inner 21 of the side sill 20 by using attachment members 43 such as bolts and nuts.

  In this embodiment, as shown in an enlarged view in FIG. 8, a nut 44 is welded and fixed in advance to the closed cross-section 24 side of the side sill inner 21, and a bolt 45 is fastened to the nut 44, whereby the cross member 30 is attached to the side sill 20. And detachable.

  The above-mentioned cross member 30 has an intermediate portion located in a front concave portion 41 below the fuel tank 40, and extends in a straight line in the vehicle width direction as seen from the plane as shown in FIGS. Both ends of the cross member 30 are detachably connected to the side sill inner 21 as described above.

  Further, a concave portion 30 </ b> A for avoiding interference with the exhaust pipe 26 is formed in an intermediate portion corresponding to the exhaust pipe 26 of the cross member 30 described above. In this embodiment, the recess 30A is formed so as to protrude toward the floor panel 4 side.

  The cross member 30 is configured such that both ends in the vehicle width direction are detachably connected to the side sill inner 21 of the side sill 20 but are not connected to the floor panel 4.

  As shown in FIG. 7, a cross member 31 (so-called No, 2.5 cross member) having a closed cross-section structure located on the vehicle rear side with respect to the cross member 30 (so-called No, 2 cross member) having the above-described closed cross-section structure. Joining pieces 31a, 31a are integrally or integrally formed at both left and right end portions in the vehicle width direction. The left and right joining pieces 31a, 31a are provided with attachment members 46 such as bolts and nuts on the side sill inner 21 of the side sill 20. And is detachably connected. The specific structure of the mounting member 46 is configured to be the same as that of FIG.

  The intermediate portion of the cross member 31 is located in the recess 42 on the rear side of the lower portion of the fuel tank 40, and extends in a straight line in the vehicle width direction as seen from the plane as shown in FIGS. Both ends of the cross member 31 are detachably connected to the side sill inner 21 as described above.

Further, a concave portion 31 </ b> A for avoiding interference with the exhaust pipe 26 is formed at an intermediate portion corresponding to the exhaust pipe 26 of the cross member 31 described above. In this embodiment, the recess 31A is formed so as to protrude to the floor panel 4 side.

  The cross member 31 described above is configured such that both ends in the vehicle width direction are detachably connected to the side sill inner 21 of the side sill 20 but are not connected to the floor panel 4.

  In short, the above-described fuel tank 40 is configured to be directly supported by a plurality of cross members 30 and 31 that are separated from each other in the front-rear direction, and these cross members 30 and 31 are arranged in the vehicle width direction when viewed from the plane. It arrange | positions so that it may extend linearly. Further, as shown in FIGS. 6 and 7, there is heat resistance between the upper portion of the fuel tank 40 and the tunnel portion 8, and between the recesses 41 and 42 on the fuel tank 40 side and the cross members 30 and 31. A fibrous sheet-like seal member 50 having a gap is interposed. The above-described cross members 30, 31 are retrofitted to the vehicle body, and each cross member 30, 31 is mounted on the side sill 20, with the fuel tank 40 mounted on the front and rear cross members 30, 31. 20 is fixed to the connection.

  Instead of the cross member structure shown in FIG. 7, as shown in FIG. 10, the cross member 31 is divided into a cross member 31L on one side and a cross member 31R on the other side so that the cross members 31L and 31R face each other. The joint flanges 51 and 52 are formed integrally or integrally on the portion, and each of the joint flanges 51 and 52 is configured to be detachable by using a mounting member 53 such as a bolt or a nut, and the cross member 31 with respect to the side sill 20 is formed. You may comprise so that improvement of the attachment or detachment of can be aimed at. The same applies to the cross member 30 located on the front side of the vehicle.

  2, 54 denotes a dash cross member, arrows F in FIGS. 5 and 9 indicate the front of the vehicle, and arrows R indicate the rear of the vehicle. FIG. 4 shows a seat arrangement state in which the front seat 9 on the passenger seat side is slid rearward after the seat cushion 14 of the rear seat 10 is folded upright on the seat back 15 side.

  As described above, in the fuel tank support structure for a vehicle according to the above embodiment, the tunnel portion 8 that protrudes upward toward the inside of the passenger compartment 2 at the center in the vehicle width direction of the floor panel 4 that forms the lower surface of the passenger compartment 2 is provided. A fuel tank support structure for a passenger compartment provided with a fuel tank 40 in the space inside the tunnel portion 8 below the floor panel 4, wherein a vehicle width across the tunnel portion 8 is formed below the floor panel 4. A cross member 30 extending in the direction is provided, and the fuel tank 40 is supported by the cross member 30.

  According to this structure, since the cross member 30 is provided in the lower part of the floor panel 4, the floor panel 4 can be lowered | hung and the living property can be aimed at by this. Specifically, the cross member 30 is provided at the lower part of the floor panel 4, the floor frame 18 is provided at the upper part of the floor panel 4, and the front side frame 17 and the floor frame 18 are continuously arranged in the front-rear direction of the vehicle. The floor panel 4 can be lowered.

In addition, since the above-described fuel tank 40 is directly supported by the cross member 30, the number of parts required for tank support can be reduced, and the vehicle body rigidity and the tank support rigidity can be ensured while having a simple structure. .
Furthermore, since the cross member 30 described above can extend straight across the tunnel portion 8 in the vehicle width direction, high vehicle body rigidity can be ensured.

  Further, side sills 20, 20 extending in the vehicle front-rear direction are provided at both ends in the vehicle width direction of the floor panel 4, and both ends in the vehicle width direction of the cross member 30 are connected to the side sills 20, 20. It is a thing.

According to this configuration, since the side sill 20 is responsible for the support rigidity of the fuel tank 40, the tank support rigidity is further improved, which is advantageous for a side collision load.
Further, a plurality of the cross members 30, 31 are provided apart from each other in the front-rear direction of the vehicle, and the cross members 30, 31 support the fuel tank 40 at a predetermined interval in the front-rear direction.

According to this configuration, even if the fuel tank 40 is formed long in the front-rear direction of the vehicle, the fuel tank 40 is directly supported by the plurality of cross members 30, 31, so that the fuel tank 40 can be stably supported. .
Moreover, the tunnel portion 8 includes a front portion having a large width in the vehicle width direction (see the wide portion 8a) and a rear portion having a narrow width in the vehicle width direction as compared to the front portion (see the narrow portion 8c). The fuel tank 40 is formed in a shape in the vehicle width direction corresponding to the tunnel portion 8.

  According to this configuration, the shape of the tunnel portion 8 and the fuel tank 40 described above can ensure the tank capacity while reducing the height of the fuel tank 40 in the vertical direction as much as possible. Ensuring comfort in the vertical direction in 2 can be achieved. In other words, it is possible to achieve both the tank capacity and the habitability. Further, the shape of the tunnel portion 8 and the fuel tank 40 described above can suppress the amount of upward protrusion of the tunnel portion 8, so that it is easy to walk through in the vehicle width direction.

In addition, the cross member 30 is disposed corresponding to at least a front portion (see the wide portion 8a) having a large width in the vehicle width direction of the tunnel portion 8.
According to this configuration, when the width of the tunnel portion 8 in the vehicle width direction is large, there is a general tendency that it is disadvantageous against a side collision. However, since the cross member 30 is provided corresponding to this portion, The rigidity of the vehicle body is improved, which is advantageous against a side collision, and the safety can be improved.

The cross member 31 is disposed corresponding to the rear portion (see the narrow portion 8c) of the tunnel portion 8 having a narrow width in the vehicle width direction.
According to this configuration, it is possible to improve the vehicle body rigidity against the side collision and the tank support rigidity.

Further, an exhaust pipe 26 is disposed on the side of the fuel tank 40 so as to extend in the front-rear direction of the vehicle, and interference with the exhaust pipe 26 is avoided at an intermediate portion in the vehicle width direction of the cross members 30 and 31. Recesses 30A and 31A are formed.
According to this configuration, the recesses 30 </ b> A and 30 </ b> A described above avoid interference with the exhaust pipe 26, so that both the arrangement of the cross members 30 and 31 and the arrangement of the exhaust pipe 26 can be achieved.

  In addition, the cross member disposing portion below the fuel tank 40 is formed with recesses 41 and 42 extending in the vehicle width direction, and the cross members 30 and 31 are positioned in the recesses 41 and 42 in the vehicle width direction. It is arranged linearly.

According to this configuration, since the cross members 30 and 31 are linearly disposed, the rigidity of the vehicle body is further improved and the strength against the side collision can be secured. Since the formation of the fuel tank 40 itself increases the rigidity, the tank rigidity can be improved.
Further, both ends of the cross members 30 and 31 in the vehicle width direction are detachably connected to the side sill 20.
According to this configuration, the maintainability of the fuel tank 40 can be improved by the above-described attachment / detachment structure.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The front portion having a large width in the vehicle width direction of the tunnel portion of the present invention corresponds to the wide portion 8a of the embodiment,
Similarly,
The rear part, which is narrower in the vehicle width direction than the front part, corresponds to the narrow part 8c,
The fuel tank corresponds to the fuel tank 40,
The present invention is not limited to the configuration of the above-described embodiment.

The top view which shows the fuel tank support structure of the vehicle of this invention. The side view which shows the fuel tank support structure of a vehicle. The perspective view of the principal part of FIG. The top view shown in the state which made the passenger seat a seat arrangement. The perspective view of a fuel tank. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 3 is a cross-sectional view taken along line B-B in FIG. 1. The elements on larger scale of FIG. The perspective view of a cross member. Sectional drawing which shows the other Example of the fuel tank support structure of the vehicle of this invention.

2 ... Vehicle compartment 4 ... Floor panel 8 ... Tunnel part 8a ... Wide part (front)
8c: Narrow part (rear part)
20 ... side sill 26 ... exhaust pipe 30,31 ... cross member 30A, 31A ... concave 40 ... fuel tank (fuel tank)
41, 42 ... recess

Claims (4)

A tunnel portion projecting upward toward the vehicle interior side is provided in the vehicle width direction center portion of the floor panel forming the vehicle interior lower surface,
A fuel tank support structure for a passenger compartment in which a fuel tank is disposed in the space in the tunnel portion below the floor panel,
A plurality of cross members extending in the vehicle width direction across the tunnel portion are provided at the lower portion of the floor panel so as to be spaced apart in the vehicle front-rear direction , and the fuel tanks are spaced apart from each other by a predetermined interval. It supports a,
Side sills extending in the longitudinal direction of the vehicle are provided at both ends of the floor panel in the vehicle width direction,
Both ends of the cross member in the vehicle width direction are connected to the side sills,
The tunnel portion includes a front portion having a large width in the vehicle width direction, and a rear portion having a narrow width in the vehicle width direction as compared with the front portion.
The fuel tank is formed in a shape in the vehicle width direction corresponding to the tunnel portion,
The cross member is disposed corresponding to at least a front portion having a large width in the vehicle width direction of the tunnel portion,
The vehicle interior is provided with a front seat and a rear seat disposed behind the front seat,
The front seat is disposed above the front portion of the tunnel portion where the width in the vehicle width direction is large, while the rear seat is further in the vehicle width direction than the rear portion of the tunnel portion where the width in the vehicle width direction is narrow. It is arranged above the slim part with a small width,
The front portion having a large width in the vehicle width direction of the tunnel portion extends to a position overlapping the front seat in the vehicle width direction in plan view,
The fuel tank disposed in the tunnel portion extends to a position overlapping with the front seat in the vehicle width direction in plan view,
The fuel tank support structure for a vehicle, wherein the cross member is disposed at a position overlapping the front seat in the front-rear direction under the front seat . An exhaust pipe is disposed on the side of the fuel tank so as to extend in the longitudinal direction of the vehicle,
A recess for avoiding interference with the exhaust pipe is formed in the vehicle width direction intermediate portion of the cross member.
The fuel tank support structure for a vehicle according to claim 1. A recess extending in the vehicle width direction is formed in the cross member disposition portion below the fuel tank,
The cross member is disposed in the recess and is linearly arranged in the vehicle width direction.
The fuel tank support structure for a vehicle according to claim 1 or 2. Both ends of the cross member in the vehicle width direction are detachably connected to the side sill.
The fuel tank support structure for a vehicle according to any one of claims 1 to 3.

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