JP2019151157A - Vehicle lower part structure - Google Patents

Abstract

To provide a vehicle lower part structure which can protect a canister and maintain performance with a simple structure.SOLUTION: A vehicle lower part structure 100 according to one embodiment of the invention includes: a vehicle rear floor panel 102; a fuel tank 104 installed below the rear floor panel 102; and a canister 106 installed adjacent to the rear side of the fuel tank 104.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle lower structure.

  In recent years, demands for safety performance at the time of collision have been increasing for vehicles. For example, as a countermeasure against a frontal collision, a technique has been developed in which a portion called a crushable zone is provided in a power unit room and the deformation of the rear cabin is suppressed by positively deforming the crushable zone.

  By adopting the above-mentioned crushable zone, the arrangement space of parts in the power unit room is being reduced particularly in a vehicle having a small size. For this reason, even parts that have been conventionally arranged in the power unit room are now increasingly moved to other places.

  One of the parts provided in the conventional power unit room is a canister. The canister is a device that collects harmful fuel evaporative gas generated in a fuel tank or the like, and has a structure in which an adsorbent such as activated carbon is mainly incorporated in a cylindrical or rectangular container. The canister is connected to the fuel tank and the power unit by piping, once adsorbs the fuel evaporative gas, draws the fuel evaporative gas into the power unit, and burns it together with the fuel.

  For example, Patent Document 1 discloses a canister tank 18 installed in a U-shape on the upper surface of the outer flange portion 20b in the fuel tank main body 14 installed below the floor panel.

Japanese Utility Model Publication No. 1-108824

  In addition to the above-mentioned demands for safety performance, in recent years there has also been an increase in demand for environmental measures, which regulates the amount of fuel evaporated from automobiles and prevents the release of fuel evaporative gas from the fuel filler port. In addition to promoting the introduction of canisters, the performance of canisters tends to increase and the size of the canisters will increase.

  If it is the structure which installs a canister with a fuel tank below the floor panel like patent document 1, it is possible to move a canister from a power unit room without a problem. However, the configuration installed above the flange of the fuel tank as in Patent Document 1 makes it difficult to allow the canister to be enlarged, and it is somewhat impractical to implement a U-shaped canister.

  In addition, when a canister is installed below the floor panel, it is expected that damage due to stepping stones or that the detachment performance will deteriorate due to cooling by the traveling wind. Further, the method of simply fixing the canister to the floor panel using brackets requires a large bracket and may increase the vehicle weight.

  In view of such problems, an object of the present invention is to provide a vehicle lower structure capable of protecting a canister and maintaining performance with a simple structure.

  In order to solve the above-described problems, a typical configuration of the vehicle lower structure according to the present invention is that the vehicle lower structure includes a vehicle floor panel, a fuel tank installed below the floor panel, and a fuel tank. And a canister installed adjacent to the side.

  According to the present invention, it is possible to provide a vehicle lower structure that can protect a canister and maintain performance with a simple structure.

It is a figure which shows the outline | summary of the vehicle lower part structure concerning the Example of this invention. It is the figure which showed the fuel tank vicinity of FIG. 1 from another direction.

  A vehicle lower structure according to an embodiment of the present invention includes a vehicle floor panel, a fuel tank installed below the floor panel, and a canister installed adjacent to the rear side of the fuel tank. It is characterized by.

  According to the above configuration, by installing the canister on the rear side of the fuel tank, it is possible to prevent a stepping stone from colliding with the canister during travel (chipping). In addition, it is possible to prevent the traveling wind from hitting the canister, protect the canister from cooling by the traveling wind, and prevent the detachment performance from deteriorating.

  The fuel tank may have a flange projecting toward the canister over the vehicle width direction, and the canister may have a flange recess recessed along the flange.

  According to the above configuration, the canister can be installed adjacent to the fuel tank.

  The vehicle lower structure may further include a tank belt that extends under the fuel tank and the canister and fixes them to the floor panel, and the canister may have a belt recess recessed along the tank belt.

  According to the tank belt and the belt recess, the canister can be simply and firmly fixed to the fuel tank and the floor panel.

  The lower end of the canister may be installed to be higher than the lower end of the fuel tank.

  According to the above configuration, the canister is hidden behind the fuel tank when viewed from the front of the vehicle, and the canister can be suitably protected from chipping and traveling wind.

  The vehicle lower structure may further include a buffer member interposed between the fuel tank and the canister.

  According to said buffer member, it becomes possible to prevent suitably a vibration and contact with a fuel tank and a canister.

  The floor panel has a rear storage portion that is recessed downward over a predetermined range on the rear end side of the vehicle so that predetermined storage items can be stored. The vehicle lower structure further includes a rear storage portion than the rear storage portion. A cross member that spans the lower side of the floor panel in the vehicle width direction on the front side, and a rear member that spans from the cross member to the lower side of the rear storage portion, and the canister is below the intersection of the cross member and the rear member It may be installed to be located in.

  The intersection between the cross member and the rear member is a place having high rigidity in the vehicle, and even when a collision or the like occurs in the vehicle, deformation due to the collision energy hardly occurs. Therefore, if it is the said structure, it becomes possible to prevent suitably the deformation | transformation of the canister by collision energy. In particular, the canister can be protected from the collision energy at the time of rear collision by the action of the rear member.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the examples are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram showing an outline of a vehicle lower structure 100 according to an embodiment of the present invention. Hereinafter, in FIG. 1 and all other drawings of the present application, the vehicle front-rear direction is indicated by arrows F (Forward) and B (Backward), the vehicle width direction is indicated by arrows L (Leftward), R (Rightward), and the vehicle vertical direction, respectively. Are illustrated by arrows U (Upward) and D (Downward), respectively.

  The vehicle lower structure 100 is configured such that a fuel tank 104 and a canister 106 are installed below a vehicle floor panel, particularly a rear floor panel 102 on the vehicle rear end side.

  The rear floor panel 102 has side members 108a and 108b joined to the sides in the vehicle width direction. A rear storage portion 110 capable of storing predetermined storage items such as spare tires is provided on the rear end side of the rear floor panel 102. The rear storage unit 110 has a configuration in which a wide area of the rear floor panel 102 near the center in the vehicle width direction is recessed downward. And the 1st cross member 112 and the 2nd cross member 114 are spanned in the vehicle width direction to the front side rather than the back storage part 110 among the lower sides of the rear floor panel 102.

  The fuel tank 104 is a container for storing fuel, and is installed near the first cross member 112 and the second cross member 114 in front of the rear storage portion 110. The canister 106 is a device that adsorbs fuel evaporative gas generated in the fuel tank 104 and the like so as not to be released into the atmosphere and draws it into a power unit (not shown). The canister 106 has a structure in which an adsorbent such as activated carbon is filled in the container, is installed adjacent to the rear side of the fuel tank 104, and is connected to the fuel tank 104 and the power unit by piping.

  The fuel tank 104 and the canister 106 are fixed to the rear floor panel 102 with the tank belts 116a and 116b stretched in the vehicle front-rear direction. The tank belts 116 a and 116 b are belt-like members made of metal or the like, and pass over the lower side of the fuel tank 104 and the canister 106. For example, the tank belts 116 a and 116 b are fixed to the first cross member 112 and the second cross member 114. The canister 106 is suspended.

  FIG. 2 is a view showing the vicinity of the fuel tank 104 of FIG. 1 from another direction. FIG. 2A shows the vicinity of the fuel tank 104 of FIG. 1 as seen from above through the rear floor panel 102, the second cross member 114, and the like. The canister 106 has a rectangular structure and is installed along the rear side of the fuel tank 104.

  The canister 106 is provided with belt recesses 118a and 118b that are recessed along the tank belts 116a and 116b. The belt recesses 118a and 118b are portions recessed in a groove shape along the tank belts 116a and 116b, and are formed not only on the rear side of the canister 106 but also on the lower side (see FIG. 1). If the belt recesses 118a and 118b are configured to be bound by the tank belts 116a and 116b, the canister 106 can be simply and firmly fixed to the fuel tank 104 and the rear floor panel 102. It is possible to efficiently absorb the load applied toward.

  FIG. 2B is a diagram showing the vicinity of the fuel tank 104 in FIG. 1 from the left side in the vehicle width direction. The fuel tank 104 is provided with a flange 120. The flange 120 protrudes from an upper and lower halfway position around the fuel tank 104. The canister 106 is provided with a flange recess 122 corresponding to the flange 120 on the rear side of the fuel tank 104. The flange recess 122 is a groove-like portion provided on the front side of the canister 106, and extends along the range of the flange 120 protruding from the rear side of the fuel tank 104 toward the canister 106 side in the vehicle width direction. It is recessed backwards.

  The flange recess 122 allows the canister 106 to be installed adjacent to the fuel tank 104. In particular, the flange recess 122 and the flange 120 are engaged with each other, and in this state, the tank belts 116a and 116b are bound together, so that even a large canister 106 can be firmly fixed without depending on brackets. It has become.

  The vehicle lower structure 100 also includes a buffer member 124 between the fuel tank 104 and the canister 106. The buffer member 124 is formed of, for example, a material having a certain degree of elasticity, and is interposed between the fuel tank 104 and the canister 106 to absorb the load. The buffer member 124 can suitably prevent vibration and contact between the fuel tank 104 and the canister 106.

  According to the vehicle lower structure 100, by installing the canister 106 adjacent to the rear of the fuel tank 104, it is possible to prevent a stepping stone (chipping) from colliding with the canister 106 during traveling. In addition, it is possible to prevent the traveling wind from hitting the canister 106, protect the canister 106 from cooling by the traveling wind, and prevent the detachment performance from deteriorating.

  In this embodiment, the canister 106 is installed such that the height H1 of the lower end 126 is higher than the height H2 of the lower end 128 of the fuel tank 104 (H1> H2). As a result, the canister 106 is hidden behind the fuel tank 104 when viewed from the front of the vehicle and is suitably protected from chipping and traveling wind.

  Refer to FIG. 1 again. A rear member 130 is joined to the lower side of the rear housing part 110. The rear member 130 extends from the second cross member 114 to the rear through the center in the vehicle width direction of the rear storage unit 110 and is also used as an installation place of the towing hook 132.

  As shown in FIG. 2B, in the vehicle lower structure 100, the fuel tank 104 and the canister 106 are installed such that the canister 106 is positioned below the intersection P1 between the second cross member 114 and the rear member 130. . The intersection point P1 between the second cross member 114 and the rear member 130 is a highly rigid place in the vehicle, and even when a collision or the like occurs in the vehicle, the deformation due to the collision energy hardly occurs. In this embodiment, the canister 106 can be suitably prevented from being deformed by impact energy. In particular, the presence of the rear member 130 can protect the canister 106 from collision energy at the time of rear collision.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention can be used for a vehicle lower structure.

DESCRIPTION OF SYMBOLS 100 ... Vehicle lower structure, 102 ... Rear floor panel, 104 ... Fuel tank, 106 ... Canister, 108a ... Right side member, 108b ... Left side member, 110 ... Rear storage part, 112 ... First cross member, 114 ... First 2 cross members, 116a ... right tank belt, 116b ... left tank belt, 118a ... right belt recess, 118b ... left belt recess, 120 ... flange, 122 ... flange recess, 124 ... cushioning member, 126 ... lower end of canister, 128 ... lower end of fuel tank, 130 ... rear member, 132 ... towing hook, H1 ... height of lower end of canister, H2 ... height of lower end of fuel tank, P1 ... between second cross member and rear member Intersection,

Claims (6)

A vehicle floor panel;
A fuel tank installed under the floor panel;
A vehicle lower structure comprising a canister installed adjacent to a rear side of the fuel tank. The fuel tank has a flange protruding toward the canister over the vehicle width direction,
The vehicle lower structure according to claim 1, wherein the canister has a flange recess recessed along the flange. The vehicle lower structure further includes a tank belt that extends over the fuel tank and the canister and fixes them to the floor panel,
The vehicle lower structure according to claim 1, wherein the canister has a belt recess recessed along the tank belt.   The vehicle lower structure according to any one of claims 1 to 3, wherein a lower end of the canister is installed to be higher than a lower end of the fuel tank.   The vehicle lower structure according to any one of claims 1 to 4, wherein the vehicle lower structure further includes a buffer member interposed between the fuel tank and the canister. The floor panel has a rear storage portion that is recessed downward over a predetermined range on the rear end side of the vehicle and is capable of storing predetermined storage items.
The vehicle substructure is further
A cross member spanned in the vehicle width direction on the lower side of the floor panel on the front side of the rear storage portion;
A rear member that spans from the cross member to the lower side of the rear storage part,
6. The vehicle lower structure according to claim 1, wherein the canister is installed to be located below an intersection of the cross member and the rear member. 6.

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