JP6848535B2 - Body structure - Google Patents

Description

The present invention relates to a vehicle body structure provided with a filler neck connecting a tank for storing an additive for exhaust gas purification and a water injection port.

Conventionally, in a vehicle equipped with an exhaust gas purification system for purifying an exhaust gas component, a vehicle equipped with a tank of an additive having a reducing action on a substance to be purified is known. For example, when the substance to be purified is nitrogen oxides (NOx), additives (reducing agents) such as an aqueous urea solution and an aqueous ammonia are stored inside the tank. The arrangement position of the tank is set, for example, under the floor of the vehicle. Further, the water injection port for injecting (replenishing) the additive into the tank is arranged adjacent to, for example, the fuel supply port for supplying fuel. For example, when the fuel filler port is provided on the rear fender surface of the vehicle as in Patent Document 1, it is conceivable that the water injection port is also provided on the rear fender surface. The tank for storing the additive and the water injection port are connected by a filler neck including a plurality of pipes.

Japanese Unexamined Patent Publication No. 2001-105900

By the way, a discharge pipe (drain hose) for discharging the additive overflowing from the water injection port to the outside of the vehicle during the water injection operation is connected to the end portion of the filler neck on the water injection port side. That is, the lower end of the drainage pipe is not connected to the tank and is attached to the vehicle body in an open state. However, some types of additives have the property of easily causing corrosion of the vehicle body, so drainage pipes are arranged so that the additives do not come into contact with the vehicle body in the process of being discharged to the outside of the vehicle. It is desirable to search.

The vehicle body structure of this case was devised in view of such a problem, and one of the purposes is to prevent the additive discharged from the drain pipe from adhering to the vehicle body. It should be noted that the other purpose of the present invention is not limited to these purposes, but is an action and effect derived by each configuration shown in the embodiment for carrying out the invention described later, and exerts an action and effect that cannot be obtained by the conventional technique. Is.

(1) The vehicle body structure disclosed here connects a vehicle-mounted tank that stores an additive for exhaust gas purification and a water injection port of the additive, and has a filler neck arranged along the wheel house of the vehicle and the above. A holding member that is attached to the filler neck and holds the filler neck to the vehicle body, an attachment member that is attached to the water injection port and attaches the water injection port to the vehicle body, and the additive that overflows from the water injection port. It is equipped with a drain pipe for discharging to the outside of the vehicle. The upper end of the drainage pipe is fixed to the mounting member, the lower end of the drainage pipe is fixed to the holding member, and the intermediate portion thereof is attached to the vehicle body via the filler neck.

(2) The wheel house is formed of a wheel house inner arranged inside the vehicle width direction and a wheel house outer arranged outside the wheel house inner in the vehicle width direction, and the filler neck is formed. The intermediate portion thereof is arranged along the wheel house inner at the rear of the wheel, and the drain pipe is arranged so that the opening at the lower end portion is located above the lower surface of the holding member. preferable.

(3) The holding member has a vertical wall extending in the vehicle width direction, and the drainage pipe has an opening at the lower end arranged behind the vehicle on the vertical wall of the holding member. preferable.
(4) The drainage pipe is preferably arranged so that the open end of the lower end portion does not come into contact with the vehicle body.
(5) The holding member has a tubular portion extending in the vertical direction while being fixed to the vehicle body, and the drainage pipe is fixed to the holding member by inserting the lower end portion into the tubular portion. Is preferable.

(6) The filler neck is interposed between a leveling pipe that defines an upper limit liquid level when injecting the additive into the tank and the middle of the leveling pipe, and the additive exceeds the upper limit liquid level. It is preferable to have a chamber that becomes a pool of the additive when injected. In this case, it is preferable that the drainage pipe has the intermediate portion attached to the vehicle body via the chamber.

According to the disclosed vehicle body structure, since the lower end of the drain pipe for discharging the additive to the outside of the vehicle is fixed to the holding member, the position of the lower end can be defined, and the discharged additive can be discharged to the vehicle body. It can be prevented from adhering. Further, since the middle part of the drainage pipe is attached to the vehicle body via the filler neck, the middle part can have play. As a result, vibration during running can be absorbed in the intermediate portion regardless of the material of the drain hose, so that the stress concentration of the drain pipe can be relaxed while defining the position of the drain pipe.

It is a perspective view of the vehicle to which the body structure which concerns on embodiment is applied. It is a vertical sectional view of the wheel house of FIG. It is a schematic diagram for demonstrating the structure of the tank and the filler neck assembly of FIG. It is a schematic enlarged side view which shows through the wheel house of FIG. 1 and omits a splash shield. It is the A direction arrow view of FIG. It is a B direction arrow view of FIG.

The vehicle body structure as an embodiment will be described with reference to the drawings. The embodiments shown below are merely examples, and there is no intention of excluding the application of various modifications and techniques not specified in the following embodiments. Each configuration of the present embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed, or can be combined as appropriate.

In the following description, the traveling direction of the vehicle is the front (front of the vehicle), the opposite side is the rear (rear of the vehicle), and the left and right are determined with reference to the front. Further, the direction of gravity will be described as downward, and the opposite will be described as upward. Further, in the left-right direction (vehicle width direction) of the vehicle, the passenger compartment side (inside the vehicle) is referred to as "inside", and the opposite (outside the vehicle) is referred to as "outside".

[1. Constitution]
The vehicle body structure of this embodiment is applied to the vehicle 10 shown in FIG. Under the floor on the rear side of the vehicle 10, the tank 9 is fixed to the vehicle body. The tank 9 is a resin container for storing additives (for example, urea aqueous solution, ammonia aqueous solution, etc., hereinafter referred to as “reducing agent”) used in the urea SCR system (Urea Selective Catalytic Reduction System) for exhaust gas purification. .. On the left rear fender of the vehicle 10, a refueling port for refueling (refueling) and a water injection port 7 for replenishing (injecting) a reducing agent are arranged adjacent to each other.

As shown in FIG. 2, the tank 9 is arranged between a pair of left and right side members 13 (vehicle body) extending in the front-rear direction of the vehicle 10 and below the rear floor panel 14 (vehicle body). Further, the water injection port 7 is fixed to the box-shaped casing attached to the outer panel 11 (vehicle body) forming the left rear fender via the boot 8 (attaching member). The boot 8 is a component for attaching the water injection port 7 to the vehicle body, and is formed in a substantially truncated cone shape with an open bottom surface. The tank 9 and the water injection port 7 are connected by a filler neck 1 including a plurality of hoses (pipes).

The filler neck 1 of the present embodiment includes a filler hose 2 (water injection pipe) for injecting a reducing agent into the tank 9, a leveling pipe 3 that defines an upper limit liquid level when the reducing agent is injected into the tank 9, and leveling. It has a chamber 6 interposed in the middle of the tube 3. Further, the filler neck 1 of the present embodiment includes a vent hose 4 (open pipe to the atmosphere) for maintaining the internal pressure of the tank 9 near the atmospheric pressure, and a reducing agent overflowing from the water injection port 7 to be discharged to the outside of the vehicle. The drain hose 5 (drain pipe) is assembled. That is, in the vehicle 10 of the present embodiment, the vent hose 4 and the drain hose 5 are attached to the vehicle body in an assembled state with respect to the filler neck 1. Hereinafter, a pipe such as a vent hose 4 and a drain hose 5 assembled with a clip, an engaging claw, or the like and integrated with the filler neck 1 is referred to as a “filanec assembly 1 ′”.

Here, the configurations of the tank 9 and the filler neck assembly 1'of the present embodiment will be described with reference to FIGS. 3 and 4. The upper end of the filler hose 2 is connected to the filler head 2a, and the lower end thereof is connected to the side surface of the tank 9. The filler head 2a is, for example, a bottomed cylindrical stepped component, and a through hole to which the filler hose 2 is connected is formed in the expanded bottom portion. Since the upper end of the leveling pipe 3 is also connected to the filler head 2a, a through hole for the leveling pipe 3 is also formed at the bottom thereof.

The upper end side of the filler hose 2 (that is, the filler head 2a) penetrates the top surface of the truncated cone-shaped boot 8 and opens toward the open bottom surface. A water injection gun is inserted into this opening when replenishing the reducing agent. The opening of the filler head 2a is closed by the cap 2b except during the replenishment work. The boot 8 is attached to the filler neck 1 so as to cover the water injection port 7, and is attached to a hole (not shown) formed in a side surface portion of the vehicle body.

The upper end of the leveling pipe 3 is connected to the filler head 2a, the lower end thereof is connected to the upper portion of the tank 9, and the leveling pipe 3 is opened inside the tank 9 at least at a position higher than the connection point between the filler hose 2 and the tank 9. Will be done. The leveling pipe 3 functions as an air passage (air escape route) for the tank 9 during the replenishment work of the reducing agent. The height position (position in the vertical direction) where the leveling pipe 3 is connected to the tank 9 is the upper limit liquid level of the reducing agent stored in the tank 9.

The chamber 6 is a hollow container that functions as a “liquid pool” that retains the reducing agent that has flowed back through the leveling pipe 3 when the reducing agent is injected beyond the upper limit liquid level. That is, the internal space of the chamber 6 functions as a space for storing the surplus reducing agent when the reducing agent is continuously replenished even if the liquid level reaches the upper limit liquid level during the replenishing work of the reducing agent. To do.

The lower end of the vent hose 4 is connected to the atmospheric release valve 4V, and the upper end thereof is opened to the atmosphere inside the wheel house 15 (see FIG. 2). The air release valve 4V functions to balance the internal pressure and the external air pressure of the tank 9 while maintaining the liquidtightness with respect to the reducing agent stored inside the tank 9 and the external moisture. The position of the atmospheric release valve 4V is set, for example, near the uppermost portion of the tank 9 so that it will not be submerged under the liquid surface even when the vehicle body posture is tilted.

The upper end 5a of the drain hose 5 is connected to the boot 8, and the lower end 5b of the drain hose 5 is opened to the atmosphere downward inside the wheel house 15. If the reducing agent overflows from the filler hose 2 or the leveling tube 3 during the replenishment work of the reducing agent, the overflowing reducing agent is collected inside the boot 8. The reducing agent collected inside the boot 8 is distributed to the drain hose 5.

As shown in FIG. 3, the reducing agent stored in the tank 9 is sucked up by the pump 41 at an appropriate timing according to the operating state of the engine mounted on the vehicle 10, and is sucked up by the reducing agent pipe 42 through the injector 43. Is supplied to. The injector 43 is arranged on the upstream side of the NOx selective reduction catalyst (both not shown) interposed on the exhaust passage.

Next, the arrangement of the filler neck 1 (filler neck assembly 1') and the fixing structure to the vehicle body will be described. As shown in FIG. 2, since the water injection port 7 is located outside the side member 13, the filler neck 1 is bent inward from the side of the side member 13 and passes under the side member 13. It is connected to the tank 9. Hereinafter, the portion of the filler neck 1 that bends downward from the side of the side member 13 is referred to as a bent portion 1a. As shown in FIGS. 2 and 4, the filler neck 1 of the present embodiment extends downward from the water injection port 7 and is arranged along the wheel house 15 behind the inside of the wheel house 15 on the rear side. Will be done.

The wheel house 15 is an arch-shaped portion that covers the upper surface of the tire 19 (wheel), and as shown in FIG. 2, for example, a wheel house inner 16 (vehicle body) arranged inside in the vehicle width direction. , It is formed in combination with the wheel house outer 17 (vehicle body) arranged outside the wheel house inner 16 in the vehicle width direction. Further, inside the wheel house 15, a splash shield 18 is provided along the inner surface shape of the wheel house 15. The splash shield 18 is a high-rigidity, high-strength resin molded product, and is fixed to the wheel house 15 with bolts, nuts, screws, clip members, and the like. The splash shield 18 is provided on the tire 19 side of the wheel house inner 16 and the wheel house outer 17, and functions to protect the vehicle body from pebbles and muddy water splashed by the tire 19.

As shown in FIG. 4, the upper end portion of the filler neck 1 is fixed to the vehicle body via the boots 8 and fixed to the fuel filler neck 30 via the brackets 2c and 31. Further, the intermediate portion of the filler neck 1 is arranged along the wheel house inner 16 behind and inside the tire 19, is fixed to the wheel house inner 16 (vehicle body), and is held by the holding member 20 on the vehicle body. Will be done. The lower end of the filler neck 1 is connected to the tank 9.

In the filler neck 1 of the present embodiment, the upper end portion of the filler neck 1 is fixed to the fuel filler neck 30 by bolting the bracket 2c on the filler head 2a side and the bracket 31 on the fuel filler neck 30 side. Further, in the filler neck 1 of the present embodiment, the flange 6a integrally formed with the chamber 6 is bolted to the wheel house inner 16, and the filler hose 2 and the leveling pipe 3 are wheeled by fixing parts 2d and 3d, respectively. By being fixed to the house inner 16, the intermediate portion thereof is fixed to the vehicle body.

Further, as shown in FIG. 2, the holding member 20 is attached to the filler neck 1 of the present embodiment so as to cover the bent portion 1a, and the holding member 20 is fixed to the vehicle body, thereby passing through the holding member 20. The periphery of the bent portion 1a is held by the vehicle body. As shown in FIG. 4, the upper end of the vent hose 4 is supported by a clip 6c integrally formed with the chamber 6, the intermediate portion thereof is held by the fixing part 3d and the holding member 20, and the lower end portion thereof is held. It is connected to the tank 9.

Further, the upper end portion 5a of the drain hose 5 is fixed to the boot 8, the lower end portion 5b thereof is fixed to the holding member 20, and the intermediate portion 5c thereof is attached to the vehicle body via the filler neck 1. In the present embodiment, a tubular connecting portion 8a is projected from the side surface of the truncated cone-shaped boot 8, and the upper end portion 5a of the drain hose 5 is connected to the connecting portion 8a. Further, the intermediate portion 5c of the drain hose 5 of the present embodiment is supported by a clip 6d integrally formed with the chamber 6, and is attached to the wheel house inner 16 via the chamber 6. In the drain hose 5 of the present embodiment, the intermediate portion 5c is supported by the two clips 6d, but the intermediate portion 5c does not have to be supported at two locations.

As shown in FIG. 2, the holding member 20 has a function of holding the filler neck assembly 1'with respect to the vehicle body, and the filler neck assembly 1'from scattered objects such as pebbles and muddy water that can enter from the tire 19 side. It is a part that also has a function to protect. Further, the holding member 20 protects the filler neck assembly 1'even when the tire 19 itself invades the inside.

The holding member 20 has a substantially L-shape that extends in the vertical direction and the lower end is bent inward when viewed from the front (when viewed from the front). The filler hose 2, the leveling pipe 3, and the vent hose 4 are arranged so as to extend inward from above along the surface of the holding member 20 facing inward. On the other hand, the drain hose 5 is arranged from the upper side to the lower side along the surface of the holding member 20 facing the inside. Further, as shown in FIGS. 5 and 6, the opening 5d of the lower end portion 5b is located above the lower surface 25 of the holding member 20 and is arranged so as to face vertically downward.

Since the reducing agent (urea aqueous solution or ammonia aqueous solution) discharged from the drain hose 5 is alkaline, it has a property of corroding metals. Therefore, the drain hose 5 is arranged so that the open end (the end face on which the opening 5d is formed) of the lower end portion 5b is not in contact with the vehicle body. In the drain hose 5 of the present embodiment, the opening 5d of the lower end portion 5b is arranged behind the vertical wall 26 of the holding member 20. Behind the vertical wall 26, a negative pressure may be generated when the traveling wind from the front hits the vertical wall 26. Therefore, by arranging the opening 5d of the drain hose 5 at this position, the reducing agent remaining in the drain hose 5 is efficiently discharged.

The holding member 20 of the present embodiment is configured by combining two parts, an upper member 20U and a lower member 20L. The upper member 20U is fixed to the vehicle body in a state of being previously assembled to the filler neck 1. On the other hand, the lower member 20L is arranged below the upper member 20U and fixed to the vehicle body after the filler neck assembly 1'and the upper member 20U are fixed to the vehicle body.

The holding member 20 of the present embodiment has a fixed point 21 for the side surface of the side member 13 (hereinafter referred to as "first fixed point 21") and a fixed point 22 for the rear floor panel 14 (hereinafter referred to as "second fixed point 22"). Has a fixed point 23 (hereinafter referred to as "third fixed point 23") with respect to the lower surface of the side member 13. The first fixing point 21 and the second fixing point 22 are provided on the upper member 20U, and the third fixing point 23 is provided on the lower member 20L. Further, the holding member 20 of the present embodiment has a fixing point 24 (hereinafter referred to as "fourth fixing point 24") for fastening the upper member 20U and the lower member 20L. The upper member 20U and the lower member 20L are fixed at the fourth fixing point 24 in a state where the lower end portion of the upper member 20U is overlapped with the upper end portion of the lower member 20L from the outside.

In the present embodiment, the opening 5d of the drain hose 5 is projected below the lower edge of the upper member 20U, and the rear surface portion of the lower member 20L is provided as the vertical wall 26. Further, in the present embodiment, a recess 26a extending in the vertical direction and protruding forward is formed on the vertical wall 26 so that the open end of the drain hose 5 does not come into contact with the holding member 20. The lower end portion 5b of the drain hose 5 is arranged along the recess 26a.

Further, the holding member 20 of the present embodiment is provided with a tubular portion 27 extending in the vertical direction while the holding member 20 is fixed to the vehicle body. The drain hose 5 is fixed to the holding member 20 by inserting the lower end portion 5b into the tubular portion 27. In the present embodiment, in the substantially U-shaped upper member 20U opened inward in a top view, the tubular portion 27 is arranged at a corner portion formed by a side surface portion and a rear surface portion. Further, as shown in FIG. 6, the holding member 20 of the present embodiment has a locking claw 29 provided inside and below the tubular portion 27. The locking claw 29 holds the vicinity of the opening 5d of the drain hose 5.

[2. effect]
(1) According to the vehicle body structure described above, since the lower end portion 5b of the drain hose 5 for discharging the reducing agent to the outside of the vehicle is fixed to the holding member 20, the position of the lower end portion 5b can be defined. As shown by the broken line in FIG. 6, the reducing agent discharged from the opening 5d of the drain hose 5 spreads downward from the opening 5d in a conical shape, but the position of the lower end 5b is fixed. It is possible to prevent the discharged reducing agent from adhering to the vehicle body. Further, since the intermediate portion 5c of the drain hose 5 is attached to the vehicle body via the filler neck 1, the intermediate portion 5c can be provided with play. As a result, the vibration during running can be reliably absorbed by the intermediate portion 5c regardless of the material of the drain hose 5, so that the stress concentration of the drain hose 5 can be relaxed while defining the position of the drain hose 5. it can.

(2) Since the drain hose 5 described above is arranged so that the opening 5d of the lower end portion 5b is located above the lower surface 25 of the holding member 20, as shown by a thick arrow in FIG. 6, the tire 19 The opening 5d of the drain hose 5 can be protected from muddy water and snow damage that are rolled up by rotation. In this way, the number of parts is increased by providing the holding member 20 for holding the filler neck 1 (filler neck assembly 1') to the vehicle body with the protection function of the filler neck assembly 1'including the drain hose 5. It is possible to improve the protection while suppressing the increase in the amount of water.

(3) In the drain hose 5 described above, since the opening 5d of the lower end portion 5b is arranged behind the vertical wall 26 of the holding member 20, the negative pressure generated by the running wind is utilized in the drain hose 5. The residual reducing agent can be efficiently discharged.
(4) Further, since the drain hose 5 described above is arranged so that the open end of the lower end portion 5b is not in contact with the vehicle body, it is possible to prevent the reducing agent from adhering to the vehicle body. In the above-described embodiment, since the holding member 20 has the locking claw 29, the portion directly above the opening end is held by the locking claw 29, so that the opening end is maintained in non-contact with the vehicle body. can do.

(5) The holding member 20 described above is provided with a tubular portion 27, and the drain hose 5 is fixed to the holding member 20 by inserting the lower end portion 5b of the drain hose 5 into the tubular portion 27. The posture of the drain hose 5 can be stabilized and fixed without creating a stress concentration portion on the drain hose 5. Further, the tubular portion 27 of the holding member 20 can protect the lower end portion 5b of the drain hose 5 from chipping and scattered objects.

(6) In the vehicle body structure described above, the intermediate portion 5c of the drain hose 5 is attached to the vehicle body (wheel house inner 16) via the chamber 6 of the filler neck 1. The chamber 6 has a larger outer surface area than pipes such as the leveling pipe 3 and the filler hose 2, and it is easy to provide a clip 6d for attaching the drain hose 5, so that the attachability of the drain hose 5 can be improved. ..

[3. Others]
Regardless of the above-described embodiment, it can be modified in various ways without departing from the spirit of the above. Each configuration of the present embodiment can be selected as needed, or may be combined as appropriate.
The specific configuration of the Philanek 1 described above is an example. For example, the fixed portion of the filler neck 1 to the vehicle body may not be the above-mentioned portion, and the arrangement of the filler neck 1 and the vent hose 4 may be different from the above-mentioned arrangement.

Further, instead of making the filler neck assembly 1', the filler neck 1 may be fixed to the vehicle body, and then the vent hose 4 and the drain hose 5 may be fixed to the filler neck 1 or the vehicle body. Further, the intermediate portion 5c of the drain hose 5 may be attached to the vehicle body via the filler neck 1, and its position does not have to be the chamber 6. Further, the fixing structures of the upper end portion 5a and the lower end portion 5b of the drain hose 5 are not limited to those described above. For example, the holding member 20 may be provided with a claw portion for holding the pipes 2 to 5 including the drain hose 5 to lock the pipes 2 to 5. Alternatively, the locking claw 29 may be omitted.

Further, the configuration, fixing position, and the like of the holding member 20 described above are examples, and are not limited to those described above. For example, the holding member 20 may be composed of one component, and the material thereof is not particularly limited. Further, the holding member 20 may be at least fixed to the vehicle body. Further, the holding member 20 may be provided with a portion surrounding the opening end of the lower end portion 5b of the drain hose 5 to further improve the protection property of the lower end portion 5b.

In the above-described embodiment, the reduction system for purifying NOx in the exhaust gas has been described in detail, but the type of additive (reducing agent) is not limited to urea water. In an exhaust gas purification system using a NOx selective reduction catalyst, ammonia water may be used instead of urea water. Further, in an exhaust purification system using a diesel particulate filter, hydrocarbons (HC, unburned fuel) may be injected into the exhaust pipe in order to promote the combustion of PM (particulate matter). .. Therefore, it is also possible to apply the above-mentioned vehicle body structure to an exhaust gas purification system that supplies ammonia water or hydrocarbons instead of urea water.

1 Filler neck 1a Bending part 2 Filler hose (water injection pipe)
3 Leveling pipe 5 Drain hose (drainage pipe)
5a Upper end 5b Lower end 5c Intermediate 5d Opening 6 Chamber 7 Water inlet 8 Boots (mounting member)
9 Tank 10 Vehicle 11 Outer panel (body)
13 Side member (body)
14 Rear floor panel (body)
15 Wheelhouse 16 Wheelhouse Inner (body)
17 Wheelhouse outer (body)
19 tires (wheels)
20 Holding member 25 Bottom surface 26 Vertical wall 27 Cylinder

Claims (6)

A filler neck arranged along the wheel house of the vehicle by connecting the in-vehicle tank for storing the additive for exhaust gas purification and the water injection port of the additive, and
A holding member that is attached to the filler neck and holds the filler neck against the vehicle body.
A mounting member that is attached to the water injection port and attaches the water injection port to the vehicle body.
A drainage pipe for discharging the additive overflowing from the water injection port to the outside of the vehicle is provided.
The drainage pipe is characterized in that an upper end portion thereof is fixed to the mounting member, a lower end portion thereof is fixed to the holding member, and an intermediate portion thereof is attached to the vehicle body via the filler neck. Construction. The wheel house is formed of a wheel house inner arranged inside the vehicle width direction and a wheel house outer arranged outside the wheel house inner in the vehicle width direction.
The filler neck has an intermediate portion thereof arranged behind the vehicle along the wheel house inner.
The vehicle body structure according to claim 1, wherein the drainage pipe is arranged so that the opening at the lower end portion is located above the lower surface of the holding member. The holding member has a vertical wall extending in the vehicle width direction and has a vertical wall.
The vehicle body structure according to claim 2, wherein the drainage pipe has an opening at the lower end arranged behind the vehicle on the vertical wall of the holding member. The vehicle body structure according to any one of claims 1 to 3, wherein the drainage pipe is arranged so that the open end of the lower end portion is not in contact with the vehicle body. The holding member has a tubular portion that extends in the vertical direction while being fixed to the vehicle body.
The vehicle body structure according to any one of claims 1 to 4, wherein the drainage pipe is fixed to the holding member by inserting the lower end portion into the cylinder portion. The filler neck was interposed between a leveling pipe that defines an upper limit liquid level when injecting the additive into the tank and the middle of the leveling pipe, and the additive was injected beyond the upper limit liquid level. In some cases, it has a chamber that serves as a pool of the additive.
The vehicle body structure according to any one of claims 1 to 5, wherein the drainage pipe is attached to the vehicle body via the chamber.

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