JP5454790B2 - Canister mounting device - Google Patents

Description

  The present invention relates to a canister mounting device, and more particularly to a canister mounting device for mounting a canister to a lower portion of a vehicle.

In vehicles, in recent years, a canister is disposed below a fuel tank, and vaporized fuel generated from the fuel tank is adsorbed to the canister to prevent air pollution.
Further, the canister has a tendency that its entire length becomes longer than the cross section due to layout constraints.
Further, when the fuel tank is made of sheet metal, it is difficult to directly attach a large canister to the lower part of the fuel tank because the material is thin and the strength is low.

JP 2002-192966 A JP 2004-60530 A

In the tank mounting structure according to Patent Document 1, the tank bracket forms a closed cross-sectional shape between the cross member on the vehicle rear side and the fuel tank, protrudes to the vehicle lower side from the cross member on the rear side, and from the rear. This protects the fuel tank against the impact of the fuel.
The canister body mounting structure according to Patent Document 2 has a canister mounting portion formed in a recess on the front side of a fuel tank, and the canister is mounted on the canister mounting portion.

By the way, conventionally, in the above-mentioned Patent Document 1, the canister disposed at the lower part of the fuel tank is supported on the vehicle body by a bracket that passes through the lower part of the canister and is connected to the vehicle body at both ends. In addition, the vibration of the evaporation pipe due to the fluctuation of the pressure of the evaporated fuel and the vibration of the parts attached to the canister are easily transmitted directly to the vehicle body through the bracket, and the maintainability of the canister and the parts attached to the canister is deteriorated. .
In Patent Document 2, the canister is directly attached to the resin fuel tank. However, even if the resin fuel tank is a large canister attached to the lower part of the fuel tank, the canister is stabilized. Thus, it is necessary to consider that the vibration of the canister and the parts attached to the canister is not transmitted to the fuel tank while being supported by the fuel tank, and improvement has been desired.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a canister attachment device that improves the maintainability of the canister and the parts attached to the canister while reducing the weight and reduces the vibration transmitted from the canister to the vehicle.

This invention places the fuel tank made of resin having a deep bottom portion and a shallow portion arranged in the vehicle width direction sides of the deep portion in the lower portion of the vehicle, below the shallow bottom portion extends in the longitudinal direction of the vehicle A canister mounting apparatus in which a tank bracket for holding the shallow bottom portion on the vehicle from below is disposed, and a canister having an overall length longer than a cross-sectional width is disposed below the shallow bottom portion , wherein the shallow bottom portion is the shallow bottom portion. the bottom surface comprising a resin bracket the canister is fixed to the lower end with its upper end is welded to the fuel tank, said bracket disposed on each opposite sides of the canister across the cross-section of the canister to form a welded portion of the shallow bottom f of the bracket in a rectangular structure having a short side portion long side portion along the length direction of the canister and out of the long side portion One of the features that it has located adjacent to the tank bracket.

  The canister mounting device according to the present invention can improve the maintainability of the canister and the parts attached to the canister while reducing the weight, and can reduce vibration transmitted from the canister to the vehicle.

FIG. 1 is a bottom view of the vehicle. (Example) FIG. 2 is a rear view of the vehicle. (Example) FIG. 3 is a bottom view of the fuel tank part. (Example) FIG. 4 is a perspective view of a state where the canister is attached. (Example) FIG. 5 is a perspective view when the canister is attached. (Example) 6 is a cross-sectional view taken along line VI-VI in FIG. (Example) FIG. 7 is a perspective view of the canister attached. (Modification)

  The present invention aims to improve the maintainability of the canister and the parts attached to the canister while reducing the weight, and to reduce the vibration transmitted from the canister to the vehicle. This is realized by arranging a resin bracket which is welded to the tank and to which the canister is fixed at the lower end.

1 to 6 show an embodiment of the present invention.
1 to 3, 1 is a vehicle, 2L is a left front wheel, 2R right front wheel, 3L is a left rear wheel, 3R right rear wheel, 4L is a left side member, and 4R is a right side member.
An engine 5 is mounted on the front portion of the vehicle 1.
At the rear part of the vehicle 1, the left rear wheel 4 </ b> L and the right rear wheel 4 </ b> R are connected by a suspension arm 6 oriented in the vehicle width direction, and the rear floor 7 at the front of the suspension arm 6 and below the vehicle 1. A fuel tank 8 is disposed below the fuel tank 8. The fuel tank 8 is arranged with its longitudinal direction oriented in the vehicle width direction.
Further, the left side member 4L and the right side member 4R constituting the vehicle body are connected by a rear cross member 9 disposed along the suspension arm 6.
The fuel tank 8 is made of a resin material and includes a shallow bottom portion 10 on the right side and below the center portion in the vehicle width direction, and the shallow bottom portion 10 on the left side and below the center portion in the vehicle width direction. A deep bottom portion 11 is provided. As shown in FIG. 6, the shallow bottom portion 10 is formed by a step D with the deep bottom portion 11. A cut valve 12 is attached to the upper portion of the fuel tank 8 at the center portion in the vehicle width direction.
The fuel tank 8 is held by the rear cross member 9 by a right tank bracket 13 that holds the shallow bottom portion 10 and a left tank bracket 14 that holds the deep bottom portion 11.
A canister 15 is disposed below the shallow bottom portion 10 of the fuel tank 8 as shown in FIGS. The canister 15 includes a canister main body 16 in which a total length L in the vehicle front-rear direction is longer than a front width W in the vehicle width direction, and is attached to a lower portion of the fuel tank 8 by a mounting device 17 of the canister 15.

In order to mount the canister 15 in the mounting device 17 for the canister 15, as shown in FIGS. 4 and 5, the lower end of the shallow bottom portion 10 of the fuel tank 8 has an upper end welded to the fuel tank 8 and a lower end. A pair of resin left bracket 18 and right bracket 19 to which the canister 14 is fixed are arranged on the part.
As shown in FIGS. 5 and 6, the left bracket 18 is formed of a rectangular body having a left one side portion 20, a left other side portion 21, a left front side 22, a left rear side portion 23, and a horizontal left bottom portion 24. It is formed in a U-shaped cross section having a left cavity portion 25. Similarly, the right bracket 19 is formed of a rectangular body having a right side portion 26, a right other side portion 27, a right front side portion 28, a right rear side portion 29, and a right bottom portion 30 in the horizontal direction. It has a U-shaped cross section.
The left bracket 18 and the right bracket 19 are disposed on both sides of the canister 15 with the cross section of the canister 15 in between.
The left welded portion 32 to the fuel tank 8 at the upper end portion of the left bracket 18 is formed in a rectangular structure having left long side portions 33 and 33 and left short side portions 34 and 34, and the left long side portion 33. 33 is arranged along the full length direction of the canister 15. Similarly, the right welded portion 35 to the fuel tank 8 at the upper end portion of the right bracket 19 is formed in a rectangular structure having right long side portions 36 and 36 and right short side portions 37 and 37, and the right side. The long sides 36 and 36 are arranged along the full length direction X of the canister 15.

Further, the canister body 16 of the canister 15 has a left mounting member 39, 39 having a pair of left bolt holes 38, 38 at the left portion and a right mounting member 41, having a pair of right bolt holes 40, 40 at the right portion. 41 is provided.
The upper surface of the left welded portion 32 of the left bracket 18 and the upper surface of the right welded portion 35 of the right bracket 19 are welded to the lower surface of the fuel tank 8 as shown in FIG.
In the left bracket 18, left mounting bolts 43, 43 are inserted into the left bolt holes 38, 38 from above the left cavity 25 as left fastening means 42, and left nuts 44, 44 are inserted into the left mounting bolt 43 from below. The left mounting members 39 and 39 are clamped and fixed to the tip of 43, and the right mounting bolts 46 and 46 are inserted into the right bolt holes 40 and 40 from above the right cavity 31 as the right fastening means 45. The canister 15 is firmly held by tightening the right nuts 47 and 47 to the tips of the right mounting bolts 46 and 46 from below and sandwiching and fixing the right mounting members 41 and 41. Therefore, the canister 15 is attached to the lower part of the fuel tank 8 fixed to the lower ends of the left bracket 18 and the right bracket 19.

In this way, the resin brackets 18 and 19 with the upper end welded to the fuel tank 8 and the canister 15 fixed to the lower end are disposed at the lower part of the resin fuel tank 8. The fuel tank 8 can be assembled to the vehicle 1 with the canister 15 and the parts (piping, valves, leak detection device, etc.) connecting the canister 15 and the fuel tank 8 fixed, thereby improving the manufacturability of the vehicle 1 Can be made.
Further, since the canister 15 can be detached from the vehicle 1 as a single unit, the maintainability of the canister 15 and the parts attached to the canister 15 (such as a leak detection device including a valve and a pump motor) can be improved.
Furthermore, resin brackets 18 and 19 are disposed on both sides of the canister 15 with the cross section of the canister 15 interposed therebetween, and the welded portions 32 and 35 of the brackets 18 and 19 to the fuel tank 8 are disposed on the long side portions 33, 33 and 36. A canister 15 having a long overall length is formed by forming a rectangular structure having 36 and short side portions 34, 34, 37, 37 and making the long side portions 33, 33, 36, 36 along the full length direction of the canister 15. Can be stably supported, and the lower surface of the fuel tank 8 can be reinforced by the brackets 18 and 19, and vibration transmitted from the canister 15 through the fuel tank 8 to the vehicle body can be reduced.

As shown in FIG. 5, the canister body 16 of the canister 15 includes an evaporation port 48 and a purge port 49 at the rear end of the full length direction X. A check valve 50 as a part for controlling the fluid flowing through the evaporation port 48 is attached to the evaporation port 48, and an evaporation pipe 51 connected to the fuel tank 8 is connected to the evaporation port 48. A purge valve 52 as a part for controlling the fluid flowing through the purge port 49 is attached to the purge port 49, and a purge pipe 53 connected to an intake unit part of the engine 5 is connected to the purge port 49.
As shown in FIGS. 2 and 3, a leak detection device 55 including a pump motor 54 is attached to the rear end portion and the lower portion of the canister 15.
As described above, the canister 15 includes the ports 48 and 49 at the end portions in the full length direction, and the components for controlling the fluid flowing through the ports 48 and 49 (leakage detection device 55 including the valves 50 and 52 and the pump motor 54). Is installed in the vicinity of the ports 44 and 45, so that the canister 15 is disposed on both sides of the canister 15 by the brackets 18 and 19 along the full length direction of the canister 15 even when the parts are attached to the canister 15. Can be placed stably.

Also, one of the parts attached to the canister 15 is a leak detection device 55 having a pump motor 54, and this leak detection device 55 is arranged at a position near the right bracket 19 as one of the brackets 18 and 19. In addition, as shown in FIG. 4, the height direction dimension H1 of the right bracket 19 is set to be larger than the height direction dimension H2 of the left bracket 18 as the other bracket (H1> H2).
In such a structure, one of the components attached to the canister 15 is a leak detection device 55 having a pump motor 54, and the leak detection device 55 is located at a position near one of the right brackets 19 of the brackets 18 and 19. Since the height dimension (H1) of the right bracket 19 is set larger than the height dimension (H2) of the other left bracket 18 (H1> H2), the pump of the leak detection device 55 is disposed. The vibration generated by the rotation of the motor 54 can be transmitted to the right racket 19 having the height dimension H1 to reduce the vibration.
Further, since the right bracket 19 has higher rigidity than the left bracket 18 (the value of the moment of inertia of the cross section is large), the vibration transmitted to the right bracket 19 rather than the vibration transmitted to the left bracket 18. Can be reduced by the right bracket 19 from the canister 15 to the fuel tank 8.

Furthermore, hollow portions 25 and 31 are formed inside the brackets 18 and 19, respectively.
Since the hollow portions 25 and 31 are formed in the brackets 18 and 19 in this way, vibration (or sound) transmitted from the canister 15 to the fuel tank 8 is confined in the hollow portions 25 and 31, and vibration (or sound) is transmitted. Efficiency can be reduced and vibration transmitted to the vehicle 1 can be reduced. Furthermore, since the hollow portions 25 and 31 are formed inside the brackets 18 and 19, the inside of the brackets 18 and 19 is hollowed out, and the brackets 18 and 19 can be reduced in weight.

In the present invention, as shown in FIG. 7, in the mounting structure 17 of the canister 15, the fastening means is fixed to the fuel tank 8 with a pair of hook-like portions 56 and 56 on the left and right in the vehicle width direction. The canister 15 can also be configured by providing the bracket 57 and the locking holes 58 and 58 that are locked to the hook-shaped portions 56 and 56 by one touch.
With such a structure, the canister 15 can be attached to and detached from the fuel tank with one touch, and the number of assembling steps and the number of parts can be reduced.

  The canister mounting device according to the present invention can be applied to various vehicles.

1 vehicle
8 Fuel tank
10 Shallow bottom
11 Deep bottom
13 Right tank bracket
14 Left tank bracket
15 Canister
16 Canister body
17 Canister mounting device
18 Left bracket
19 Right bracket
25 Left cavity
31 Right cavity
32 Left weld
33 ・ 33 Left long side
34.34 Short left side
35 Right weld
36.36 Right long side
37.37 Right short side
39/39 Left mounting member
41 ・ 41 Right mounting member
42 Left fastening means
43 ・ 43 Left mounting bolt
45 Right fastening means
46 ・ 46 Right mounting bolt
48 Evapoport
49 Purge port
50 Check valve
52 Purge valve
54 Pump motor
55 Leak detection device

Claims (3)

A resin fuel tank having a deep bottom portion and a shallow bottom portion disposed on a vehicle width direction side portion of the deep bottom portion is disposed at a lower portion of the vehicle, extends in the vehicle front-rear direction, and extends below the shallow bottom portion to the shallow bottom portion. A canister mounting device in which a tank bracket for holding the vehicle from below is disposed, and a canister having a total length longer than a cross-sectional width is disposed below the shallow bottom portion, the shallow bottom portion is disposed on the bottom surface of the shallow bottom portion. An upper end is welded to the fuel tank, and a resin bracket is provided at the lower end to fix the canister, and the bracket is disposed on each side of the canister across the cross section of the canister. forming a welded portion of the shallow portion f in a rectangular structure having a long side and a short side portion along the length direction of the canister, and the data of one of the long side portion Mounting device of the canister, characterized in that arranged at a position adjacent to the click bracket. The canister is provided with a port at an end portion in the full length direction, and a leak detection device provided with a pump motor is attached to the port . The leak detection device is disposed at a position near one of the brackets. 2. The canister mounting device according to claim 1, wherein a dimension in the height direction is set larger than a dimension in the height direction of the other bracket . Inside the bracket, the mounting device of the canister according to claim 1 or claim 2, characterized in that the formation of the cavity.

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