JP4355312B2 - Arrangement structure of canister in vehicle - Google Patents

Description

  The present invention relates to an arrangement structure of a canister in a vehicle. For example, the evaporated fuel generated in a fuel tank arranged under the floor of a rear seat of the vehicle is temporarily adsorbed and held by the adsorbent, and the temperature of the adsorbent increases. It is related with the arrangement | positioning structure with respect to the vehicle of the canister comprised so that fuel may be removed by this and it may supply to combustion of an engine.

Evaporated fuel generated in the fuel tank is once adsorbed and held (charged) by an adsorbent such as activated carbon to prevent it from being released into the atmosphere. When the engine is operating, the fuel is drawn from the adsorbent into the intake system due to the temperature rise A canister that is configured to be separated (purged) and supplied to engine combustion is well known. A structure in which this canister is arranged under the floor of a front seat (driver seat and front passenger seat) is known (for example, see Patent Document 1).
In Patent Document 1, a canister disposed under the floor of the front seat is connected to a fuel tank disposed under the floor of the rear seat at the rear of the vehicle via an evaporative fuel pipe (not shown), The vaporized fuel generated in the above is temporarily adsorbed and held in the canister through the vaporized fuel pipe.
JP 2003-237390 A (see paragraph number 0006, FIG. 1)

  Incidentally, in the arrangement structure disclosed in Patent Document 1 described above, the canister is arranged under the floor of the front seat away from the fuel tank arrangement location. For this reason, conventionally, there is a problem that an evaporative fuel pipe or the like piped from the canister to the fuel tank becomes long, and it is not a rational arrangement structure of the canister in the vehicle.

  Therefore, the present invention has been made to solve the above-described problems, and it is an object of the present invention to provide an improved canister arrangement structure for a vehicle so as to rationally arrange the canister in the vehicle.

In order to solve the above-mentioned problems, according to the present invention, in claim 1, a canister is arranged on a vehicle for adsorbing evaporated fuel generated in a fuel tank to an adsorbent, and the fuel tank passes a propeller shaft. A deep tunnel fuel chamber on one side across the center tunnel, and a shallow fuel chamber with a bottom raised from the tank bottom of the deep fuel chamber on the other side, The canister is disposed in a space secured under the shallow fuel chamber due to a difference in height between the deep bottom fuel chamber and the tank bottom, and an exhaust pipe is disposed between the propeller shaft and the canister. It is characterized by.

In the present invention, a protective member is provided around the canister, the protective member is attached to a vehicle body frame, and the protective member is formed of a pipe material or a bar material. (Claim 2).
In the present invention, the protective member connects the front vertical saddle and the rear vertical saddle attached to the body frame, the front vertical saddle and the rear vertical saddle, And a horizontal collar having a frame shape.

  According to the first aspect of the present invention, the height difference (step) between the deep bottom fuel chamber on one side and the tank bottom (low part) sandwiching the center tunnel of the fuel tank through which the propeller shaft passes is used to The canister can be placed in a space secured under the shallow fuel chamber on the side. Thereby, the canister can be reasonably arranged under the fuel tank.

  Moreover, according to the structure of Claim 2, a canister can be protected from an obstruction etc. with a protection member.

  The canister can be disposed rationally under the fuel tank by arranging the canister in the vehicle according to the present invention as described above.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 is a schematic side view of a vehicle showing an embodiment adopting a canister arrangement structure according to the present invention, and FIG. 2 is a schematic bottom view of the vehicle.
In the present embodiment, Fr represents the front side, Rr represents the rear side, L represents the left side, and R represents the right side according to the direction viewed from the driver.

≪Explanation of vehicle≫
The vehicle 1 is a so-called two-box car that does not have a partition that partitions the cabin (cabin) 2 and the trunk chamber 3. As shown in FIGS. 1 and 2, the vehicle 1 is configured to transmit power from the engine 6 mounted on the front portion of the vehicle body frame 4 including the front wheels 5 to the rear wheels 8 by the propeller shaft 7. This is a rear wheel drive vehicle (so-called FR vehicle).

  In addition, the vehicle 1 includes a front seat 9 (driver seat and front passenger seat) that is arranged in a substantially central portion of the passenger compartment 2 in the width direction of the vehicle body frame 4, and between the passenger compartment 2 and the trunk compartment 3. Includes a rear seat 10, and a fuel tank 11 is disposed under the floor of the rear seat 10. The fuel tank 11 is covered with a floor panel 33 provided on the vehicle body frame 4 over substantially the entire surface.

  Further, as shown in FIG. 2, the vehicle 1 includes an exhaust pipe 32 piped from the engine 6 to a muffler 31 disposed on the rear side of the vehicle 1 in parallel with the propeller shaft 7 under the floor. .

≪Description of body frame≫
As shown in FIG. 2, the vehicle body frame 4 includes a floor side frame 15 that extends in the front-rear direction of the vehicle body on the left side and right side of the front side of the vehicle 1, and a front cross that is spanned between the front end portions of the floor side frame 15. A member 16 is provided.

The vehicle body frame 4 is joined to the upper member 17 that extends in the front-rear direction of the vehicle body on the outside of the floor side frame 15 in the vehicle width direction and obliquely above, and is joined to the rear end portion of the vehicle upper body 17. A side sill 18 extending in the front-rear direction and a rear side frame 19 extending in the front-rear direction of the vehicle body from the rear end of the side sill 18 on the left side and the right side of the vehicle 1 are provided.
Further, the vehicle body frame 4 includes a middle cross member 20 that spans between the rear end side of the side sill 18, specifically, the rear end side along the front edge of the fuel tank 11. A rear cross member 21 is provided between the rear ends.

≪Explanation of fuel tank≫
FIG. 3 is a perspective view showing an embodiment of the fuel tank, and FIG. 4 is an enlarged cross-sectional view showing a main part taken along line IV-IV in FIG.
As shown in FIG. 3, the fuel tank 11 is provided with a center tunnel 12 that has a substantially rectangular shape in a plan view and extends downward in the short direction at a central portion on the tank bottom side in the longitudinal direction. The fuel tank 11 includes a deep bottom fuel chamber 11a on one side of the center tunnel 12 and is raised from the tank bottom of the deep bottom fuel chamber 11a. The fuel tank 11 has a deep bottom fuel chamber 11a on the upper side in the tank. A communicating shallow fuel chamber 11b is provided on the other side.

Thus, as shown in FIG. 4, the shallow fuel chamber formed on the other side due to the height difference (step) from the tank bottom of the deep bottom fuel chamber 11a formed on one side with the center tunnel 12 interposed therebetween. A space 13 is secured below 11b. A canister 14 is arranged in this space 13.
And the canister 14 arrange | positioned in the space 13 is protected by the protection member 22 attached to the vehicle body frame 4, as shown in FIG.
The canister 14 is attached to the tank bottom of the shallow fuel chamber 11b of the fuel tank 11 or the vehicle body frame 4 by a mounting bracket (not shown) and is supported in the space 13 and arranged.

≪Description of canister≫
FIG. 5 is a system diagram of the evaporative fuel processing apparatus provided to explain the canister.
The canister 14 is a component constituting an evaporative fuel processing device 23 that processes evaporative fuel generated in the fuel tank 11 when the engine 6 is stopped. The canister 14 is a container filled with an adsorbent (not shown) such as activated carbon.

The canister 14 is connected to the fuel tank 11 via a first evaporated fuel pipe 24 which will be described later, and is connected to the engine 6 via an intake pipe 25 which will be described later.
Thereby, the canister 14 once adsorbs and holds (charges) the evaporated fuel from the fuel tank 11 generated in the fuel tank 11 when the engine 6 is stopped and flowing out through the first evaporated fuel pipe 24 by the adsorbent. During operation (driving) of the engine 6, air is taken into the canister 14 from the outside by the intake load of the intake pipe 25, and the temperature of the adsorbent is raised to cause the fuel to desorb (purge) from the adsorbent. It is configured to be sucked into the intake pipe 25 and supplied to the combustion of the engine 6.

  As shown in FIG. 5, the evaporative fuel processing device 23 includes a first evaporative fuel pipe 24 that is connected to the fuel tank 11 and the canister 14 in order to flow the evaporative fuel from the fuel tank 11 to the canister 14. In addition, a two-way valve 26 is provided as a two-way valve provided in the middle of the first evaporated fuel pipe 24.

  Further, as shown in FIG. 5, the evaporative fuel processing device 23 is configured to cause the evaporative fuel from the fuel tank 11 once adsorbed and held by the canister 14 to flow to the intake pipe 25 of the engine 6. 14 is provided with a second evaporative fuel pipe 27 that is piped up to 14. In order to control the flow rate of the evaporated fuel that flows from the canister 14 to the intake pipe 25, a purge control valve 28 is provided in the middle of the second evaporated fuel pipe 27.

FIG. 6 is a perspective view showing an embodiment of the protection member. Here, description will be made with reference to FIG. 4 as appropriate.
The protection member 22 is formed of a pipe material or a bar material having appropriate rigidity, and protects the canister 14 from a collision from the side surface or the lower side (the ground side) of the vehicle body. For example, it is attached to the vehicle body frame 4 so as to protect the canister 14 from a collision with an obstacle or a stepping stone.

As shown in FIG. 6, the protection member 22 includes a front vertical flange portion 22 a having a mounting plate 29 attached to the middle cross member 20 of the vehicle body frame 4 by bolting at the upper end. In addition, a rear vertical flange 22b having a mounting plate 30 attached to the rear side frame 19 of the vehicle body frame 4 by bolting is provided at the upper end.
And the horizontal hook part protruded from the lower end side of the front and rear vertical hook parts 22a, 22b toward the lower floor direction of the vehicle 1 (the width direction of the vehicle 1) by being bent into a substantially U shape or connected by welding. 22c.
Thereby, as shown in FIG. 6, the protection member 22 is formed in a substantially L shape when viewed from the front side and the rear side of the vehicle 1, and is a space secured under the shallow fuel chamber 11 b of the fuel tank 11. The canister 14 disposed on the vehicle body 13 is attached to the vehicle body frame 4 so as to protect the canister 14 from the side surface and the lower surface thereof (see FIG. 4).

  According to the arrangement structure of the canister 14 of the present embodiment configured as described above to the vehicle 1, as shown in FIG. 4, the center tunnel 12 of the fuel tank 11 provided for passing the propeller shaft 7 is provided. The canister 14 can be arranged in the space 13 secured under the shallow fuel chamber 11b on the other side by utilizing the height difference (step) between the deep bottom fuel chamber 11a on one side and the tank bottom. As a result, the canister 14 can be reasonably disposed under the fuel tank 11 close to the fuel tank 11. Therefore, the efficiency of the canister 14 to the vehicle body package can be improved and the fuel system device can be mounted on the vehicle.

  Further, as shown in FIG. 4, the canister 14 can be protected by the protective member 22 attached to the vehicle body frame 4 so as not to be damaged by an impact or a stepping stone caused by a collision with an obstacle from the side surface or the lower surface. it can.

The specific configuration of the embodiment of the present invention is not limited to the above-described embodiment, and there is a change in the design within the scope of the present invention described in claims 1 and 2 without departing from the gist of the present invention. However, it is included in the present invention.
For example, even in a vehicle in which a fuel tank is disposed under the floor of the front seat 9 (driver's seat and passenger seat), a canister can be disposed as in the above-described embodiment. And it can protect from an obstruction etc. with the protection member 22 attached to the vehicle body frame 4. FIG.
The vehicle 1 is not limited to a rear wheel drive vehicle, but may be a four wheel drive vehicle having front wheels as drive wheels. Further, the protective member 22 may be directly attached to the tank bottom of the shallow fuel chamber 11 b of the fuel tank 11. Further, the protection member 22 is not limited to a pipe material or a bar material, and can be formed using a plate material, an angle material, or the like.
As described above, in a specific embodiment of the present invention, even if there is a change in the design within a range not departing from the gist of the invention, it is included in the present invention.

1 is a schematic side view of a vehicle showing an embodiment adopting a canister arrangement structure according to the present invention. It is a schematic bottom view of the vehicle. It is a perspective view which shows embodiment of a fuel tank. It is sectional drawing which expands and shows the principal part along the IV-IV line | wire of FIG. It is a systematic diagram of the evaporative fuel processing apparatus provided in order to demonstrate a canister. It is a perspective view which shows embodiment of a protection member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car compartment 3 Trunk room 4 Body frame 5 Front wheel 6 Engine 7 Propeller shaft 8 Rear wheel 9 Front seat 10 Rear seat 11 Fuel tank 11a Deep bottom fuel chamber 11b Shallow bottom fuel chamber 12 Center tunnel 13 Space 14 Canister 22 Protection Element

Claims (3)

An arrangement structure of a canister for adsorbing an evaporative fuel generated in a fuel tank to an adsorbent,
The fuel tank includes a center tunnel through which the propeller shaft passes, and has a deep bottom fuel chamber on one side sandwiching the center tunnel, and a shallow bottom raised from the bottom of the deep bottom fuel chamber on the other side. With a bottom fuel chamber,
The canister is disposed in a space secured under the shallow fuel chamber due to a difference in height between the deep bottom fuel chamber and the tank bottom ,
An arrangement structure of a canister on a vehicle, wherein an exhaust pipe is arranged between the propeller shaft and the canister . The protection member is provided around the canister, the protection member is attached to a vehicle body frame , and the protection member is formed of a pipe material or a bar material. Arrangement structure of canister on vehicle.   The protective member connects a front vertical hook and a rear vertical hook that are attached to the vehicle body frame, the front vertical hook and the rear vertical hook, and has a frame shape. And comprising
  The arrangement structure of the canister according to claim 2 on a vehicle.

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