JP2000006674A - Fuel piping structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel piping structure capable of arranging a fuel pipe below a rear floor panel in a vehicle having a sub frame. SOLUTION: A connection member 4 of a sub frame 5 is provided on the vehicle center side in an offset manner from a side member 1 to form a space part 9 extended in the vehicle width direction between a lower surface of the side member 1 and an upper surface of the connection member 4, and a filler tube 7 and a bent tube 8 which are fuel pipes of a fuel tank 6 arranged across the side member 1 and the connection member 4 are passed in the space part 9 to arranged these fuel pipes below the rear floor panel 2 even in the vehicle having the sub frame 5. The efficiency of a space above the floor can be effectively utilized, the number of parts can be reduced, the weight can be reduced, and the cost can be favorably reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement structure of a filler tube and a vent tube which are fuel lines of an automobile fuel tank, and more particularly to an arrangement structure of a vehicle having a subframe.

[0002]

2. Description of the Related Art As a conventional fuel pipe arrangement structure of an automobile, there is known a structure in which a filler tube and a vent tube, which are fuel pipes, are arranged under a rear floor panel as disclosed in Japanese Patent Application Laid-Open No. 9-39588. Have been.

However, in a vehicle having a sub-frame, the sub-frame connects a pair of front and rear cross members provided between a pair of left and right side members provided on the lower surface of the rear floor panel, and connects the cross members below the side members. When the filler tube and the vent tube, which are the fuel pipes of the fuel tank, are to be routed below the rear floor panel, the connecting member of the subframe exists below the side member as described above. Therefore, a filler tube and a vent tube are arranged so as to straddle the lower part of the connecting member,
There was a problem that a hanging portion was formed in a vent tube functioning as an air vent, and an air trap was formed.

Therefore, in a conventional fuel pipe arrangement structure of a vehicle having a subframe, as shown in FIG. 5, a filler tube 7 is arranged so as to straddle below the side member 1 and the connecting member 4 of the subframe 5. On the other hand, the vent tube 8 is penetrated from the lower surface of the rear floor panel 2 into the vehicle interior, passes through the interior of the trunk space in the vehicle interior, penetrates through the wheel house inner 16, and is connected to the filler lid provided on the side of the vehicle. Known are those that have been searched.

In the drawings, reference numeral 14 denotes a sealing member for sealing the rear floor panel 2 and a portion penetrating the vent tube 8 of the wheel house 16, and 15 denotes a tube protector for protecting the vent tube 8.

[0006]

According to the conventional structure, since the rear floor panel is penetrated through the vent tube to the trunk portion in the vehicle interior, a protruding portion is formed in the trunk space, and the trunk space is formed. There was a problem that sacrificed.

Further, since the vent tube penetrates the rear floor panel, a sealing member and a tube protector for sealing the penetrating portion are separately required, which increases the number of parts and is disadvantageous in cost. In addition, the number of assembling steps increases, which is disadvantageous in terms of workability.

Further, in order to prevent fuel leakage in the event of a rear collision of the vehicle from the viewpoint of ensuring safety, the cost and weight are increased, for example, by making the sealing portion through which the vent tube penetrates the rear floor panel into a robust structure. There was a problem of getting it.

Accordingly, the present invention provides an automobile fuel piping arrangement structure in which a fuel piping can be routed under a rear floor panel in a vehicle having a subframe.

[0010]

According to the present invention, a pair of cross members are provided between the pair of left and right side members on the lower surface of the rear floor panel, and a connecting member for connecting the cross members is provided. In the structure in which the fuel tank is mounted in front of the sub-frame while the sub-frame is provided, the connecting member of the sub-frame is provided offset to the vehicle center side from the side member, and the lower surface of the side member and the upper surface of the connecting member are provided. A space portion extending in the vehicle width direction is formed between the fuel tank and the fuel tank, and a filler tube and a vent tube of the fuel tank, which are routed across the side member and the connection member, are disposed through the space portion. And

According to a second aspect of the present invention, the connecting member according to the first aspect is provided at a lower ground height than the side member, and a space between the lower surface of the side member and the side surface of the connecting member is provided.
A non-interference area in which a drive shaft extending in the vehicle width direction from the rear differential device on the vehicle center side does not interfere is provided, and a filler tube and a vent tube are arranged in the non-interference area.

According to a third aspect of the present invention, the connecting member according to the second aspect is formed in a substantially V-shape in which a portion substantially directly above the drive shaft has the highest height above the ground. A space formed between the upper surface of the connecting member and the lower surface of the side member is formed in a substantially triangular shape in a side view at a position in front of the bent portion of the character shape.

A fourth aspect of the present invention is characterized in that a vent tube is routed in a narrow portion of a substantially triangular space portion and a filler tube is routed in a wide portion, as viewed from the side.

[0014]

According to the first aspect, the connecting member of the sub-frame is provided offset from the side member toward the vehicle center, and spreads in the vehicle width direction between the lower surface of the side member and the upper surface of the connecting member. Since the space portion is formed, and the filler tube and the vent tube of the fuel tank routed crossing the side member and the connection member are disposed through the space portion, the vehicle has a subframe. Also prevents the hanging of the vent tube,
The vent tube can be routed on the lower surface of the floor without passing through the cabin, so that space efficiency such as a trunk space above the rear floor panel can be effectively used. Sealing members and tube protectors used when wiring indoors are no longer required, reducing the number of parts.
The weight can be reduced, and the cost can be advantageously obtained.

According to the second aspect, in addition to the effect of the first aspect, the connecting member is provided at a lower ground height than the side member, and the vehicle is provided between the lower surface of the side member and the side surface of the connecting member. A non-interference area where the drive shaft extending in the vehicle width direction from the rear differential device on the center side does not interfere is provided, and the filler tube and the vent tube are arranged in the non-interference area. Even if the value exceeds the allowable value, the drive shaft remains only on the lower surface of the connecting member, and can protect the filler tube and the vent tube disposed in the non-interference area.

According to the third aspect, in addition to the effect of the second aspect, the connecting member is formed in a substantially V-shape in which a portion substantially directly above the drive shaft has the highest ground clearance. A space formed between the upper surface of the connection member and the lower surface of the side member at a position in front of the bent portion having a U shape,
Even if the connecting member is provided at a lower ground level than the side member because it is formed in a substantially triangular shape when viewed from the side, interference between the drive shaft and the connecting member at a position almost directly above the drive shaft. Can be avoided.

According to the fourth aspect, in addition to the effect of the third aspect, since the vent tube is routed to the narrower portion of the substantially triangular space portion and the filler tube is routed to the wider portion in a side view, The space can be minimized, the layout efficiency can be improved, and the vent tube can be easily piped to the center of the fuel tank where the liquid level does not fluctuate much without crossing the filler tube.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings, in which the same reference numerals are assigned to the same parts as in the above-mentioned conventional configuration.

1 to 4, reference numeral 1 denotes a pair of left and right side members disposed on the lower surface of a rear floor panel 2 of the vehicle body in the front-rear direction of the vehicle. And a connecting member 4, 4 for connecting the cross members 3, 3 to each other.

The connecting members 4 and 4 of the sub-frame 5 are provided so as to be offset closer to the vehicle center than the side members 1 and 1, and are provided between the lower surface of the side member 1 and the upper surface of the connecting member 4 in the vehicle width direction. An expanding space portion 9 is formed, and when arranging a filler tube 7 and a vent tube 8 described later, the filler tube 7 and the vent tube 8 are arranged so as to cross the side member 1 and the connecting member 4 through the space portion 9.

Reference numeral 6 denotes a fuel tank mounted in front of the subframe. The fuel tank 6 has a filler tube 7 for injecting fuel as a fuel pipe, and a vent tube 8 for bleeding air from the fuel tank 6. And are connected.

The filler tube 7 and the vent tube 8 are supported by a support bracket (not shown) attached to the side member 1 and the like, and extend from the fuel tank 6 to the rear side of the vehicle body.

Reference numeral 10 denotes a rear differential device,
The rear end of the rear differential device 10 is connected to the cross member 3 via a mount M1 provided on the vehicle center side of the cross member 3 behind the sub-frame 5.
Attached to.

On the other hand, the front end of the rear differential device 10 is attached to the vehicle center side of the cross member 3 on the front side of the sub-frame 5 by a plurality of bolts by an attachment plate 11 having a substantially saddle-shaped cross section.

The cross members 3 and 3 of the subframe 5
3 is a bracket 12 provided on the lower surface of the side members 1 and 1.
, Via a mount M2 to absorb vibrations from the rear differential device 10.

In particular, in this embodiment, the sub-frame 5
4 is provided at a lower ground height than the side member 1, and as shown in FIG. 4, between the lower surface of the side member 1 and the side surface of the connection member 4, Drive shaft 13 extending in the direction
Is provided with a non-interference area S in which no interference occurs.
In addition, a filler tube 7 and a vent tube 8 are provided.

Further, the connecting member 4 is formed in a substantially U-shape so that a portion directly above the drive shaft 13 has the highest ground height, and the substantially U-shaped bent portion of the connecting member 4 is formed. The space 9 formed between the upper surface of the connecting member 4 and the lower surface of the side member 1 is formed in a substantially triangular shape in a side view at the front position of the triangular shape.
The vent tube 8 is routed on the narrow side and the filler tube 7 is routed on the wide side.

According to the structure of the above embodiment, the connecting member 4 of the sub-frame 5 is provided to be offset toward the vehicle center side from the side member 1 so that the lower surface of the side member 1 and the upper surface of the connecting member 4 are provided. A space portion 9 extending in the vehicle width direction, and the filler tube 7 of the fuel tank 6 arranged so as to intersect with the side member 1 and the connecting member 4.
And the vent tube 8 are disposed through the space 9, so that even in a vehicle having the sub-frame 5,
The vent tube 8 can be prevented from hanging down, and the vent tube 8 can be routed on the lower surface of the rear floor panel 2 without passing through the vehicle interior, thereby effectively improving space efficiency such as a trunk space above the rear floor panel 2. Needless to say, the seal member 14 and the tube protector 15 used when the rear floor panel 2 penetrates and is routed in the vehicle cabin become unnecessary, and
The number of parts can be reduced, the weight can be reduced, and the cost can be advantageously obtained.

Further, the connecting member 4 is provided at a lower height than the side member 1 above the ground, so that the vehicle differential is provided between the lower surface of the side member 1 and the side surface of the connecting member 4 from the rear differential device 10 on the vehicle center side. A non-interference area S where the drive shaft 13 extending in the direction does not interfere is provided, and the filler tube 7 and the vent tube 8 are separated from the non-interference area S.
Therefore, even if the drive shaft 13 receives an excessive input and the bounding stroke exceeds the allowable value, the drive shaft 13 remains on the lower surface of the connecting member 4 and is disposed in the non-interference area S. The provided filler tube 7 and vent tube 8 can be protected.

Further, the connecting member 4 is formed in a substantially V-shape in which the portion directly above the drive shaft 13 has the highest ground height, and is located at a position in front of the substantially V-shaped bent portion of the connecting member 4. Since the space 9 formed between the upper surface of the connecting member 4 and the lower surface of the side member 1 is formed in a substantially triangular shape when viewed from the side, the connecting member 4 is higher than the side member 1 above the ground. Even if it is provided lower, it is possible to avoid interference between the drive shaft 13 and the connecting member 4 at a position almost directly above the drive shaft 13.

Moreover, since the vent tube 8 is routed through the narrow portion of the space portion 9 which is substantially triangular when viewed from the side, and the filler tube 7 is routed through the wide portion, the space portion 9 is formed.
Can be minimized, the layout efficiency can be improved, and the vent tube 8 can be easily piped to the center of the fuel tank 6 with little fluctuation in the liquid level without crossing the filler tube 7.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view of the embodiment.

FIG. 3 is a plan view of the embodiment.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is an explanatory sectional view showing a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side member 2 Rear floor panel 3 Cross member 4 Connecting member 5 Subframe 6 Fuel tank 7 Filler tube 8 Vent tube 9 Space 10 Rear differential device 13 Drive shaft

Continued on the front page (72) Inventor Masato Shida 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 3D003 AA04 AA18 BB01 CA14 CA48 DA07 DA08 DA13 3D038 CA04 CA11 CA14 CA15 CA17 CA27 CB01 CC03 CC13 CC17 CD01 CD02 CD12

Claims (4)

[Claims] 1. A sub-frame comprising a pair of front-back cross members provided between a pair of left and right side members on the lower surface of a rear floor panel and a connecting member connecting the cross members is provided, and a sub-frame is provided in front of the sub-frame. In the structure in which the fuel tank is mounted, the connecting member of the sub-frame is provided to be offset toward the vehicle center side from the side member, and a space extending in the vehicle width direction between the lower surface of the side member and the upper surface of the connecting member is provided. A fuel pipe arrangement structure for an automobile, wherein a filler tube and a vent tube of the fuel tank formed and arranged so as to intersect with a side member and a connection member are arranged through the space. 2. A drive shaft extending between a lower differential of the side member and a side surface of the connection member in a vehicle width direction between a lower surface of the side member and a side surface of the connection member. 2. A fuel pipe arrangement structure for an automobile according to claim 1, wherein a non-interference area where no interference occurs is provided, and a filler tube and a vent tube are arranged in the non-interference area. 3. The connecting member is formed in a substantially V-shape in which a portion substantially directly above the drive shaft has the highest ground height, and the connecting member is provided at a position in front of the substantially V-shaped bent portion of the connecting member. The fuel pipe arrangement structure for an automobile according to claim 2, wherein a space formed between the upper surface of the first member and the lower surface of the side member is formed in a substantially triangular shape when viewed from the side. 4. The structure for arranging a fuel pipe of an automobile according to claim 3, wherein a vent tube is routed through a narrow portion of the substantially triangular space portion in a side view and a filler tube is routed through a wide portion thereof. .