JP7121342B2 - Reductant inlet structure - Google Patents

Description

The present invention relates to a reducing agent injection port structure in an automobile provided with a reducing agent tank for storing a reducing agent for reducing exhaust gas discharged from an internal combustion engine.

2. Description of the Related Art An automobile equipped with an engine (internal combustion engine) is provided with an exhaust purification device such as a catalytic converter in order to reduce harmful components in exhaust gas discharged from the engine.

In recent years, as one of the exhaust purification devices, a reduction catalytic converter is provided for reducing nitrogen oxides (NO _x ) contained in the exhaust gas through a reduction reaction. As a reducing agent), an aqueous urea solution (urea water) that generates ammonia by thermal decomposition is used.

A vehicle using such urea water as a reducing agent is provided with a reducing agent tank for storing the urea water to be injected into the exhaust system, and the reducing agent tank is replenished with the urea water. A replenishment port is provided for refilling (see, for example, Patent Document 1).

JP 2009-96223 A

In the technique described in Patent Document 1, when the urea aqueous solution is replenished to the urea tank, if the urea aqueous solution spills around, the urea aqueous solution solidifies over time, and the solid matter spreads around the injection port. pile up.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to prevent the solidification and accumulation of the reducing agent spilled from the supply port.

A reducing agent injection port structure according to a first invention for solving the above problems is a reducing agent injection port structure for a vehicle equipped with an exhaust gas purification device that injects a reducing agent into an exhaust passage of an engine to purify exhaust gas. a reducing agent tank for storing the reducing agent; a replenishment pipe connecting the replenishing port for replenishing the reducing agent and the reducing agent tank; a lid member whose door is opened by pressing; a reducing agent receiving portion disposed around the replenishing pipe for receiving the reducing agent leaked from the replenishing port; and a discharge port for discharging from the reducing agent receiving portion, wherein the discharge port is provided on the other side opposite to the one with the supply pipe inserted into the reducing agent receiving portion interposed therebetween .

A reducing agent injection port structure according to a second aspect of the present invention for solving the above problems is the reducing agent injection port structure according to the first aspect of the invention, in which a first opening into which the supply pipe is inserted is formed on one side. a reducing agent discharge assisting member having an opening and a second opening having a second opening larger than the first opening facing the replenishing port on the other side; It is characterized by being connected to the opening.

A reducing agent injection port structure according to a third invention for solving the above problems is the reducing agent injection port structure according to the second invention, wherein the second opening of the reducing agent discharge assisting member is covered with the lid member. It is characterized by

A reducing agent injection port structure according to a fourth aspect of the present invention for solving the above problems is the reducing agent injection port structure according to the third aspect of the invention, wherein the replenishment port is located toward one side in the vehicle width direction and directed upwardly of the vehicle. The lid member is arranged to face the lid member, and is connected to the reducing agent discharge auxiliary member via a hinge member arranged on the one side in the vehicle width direction.

A reducing agent injection port structure according to a fifth aspect of the present invention for solving the above problems is the reducing agent injection port structure according to the third or fourth aspect of the invention, wherein the reducing agent discharge auxiliary member is separate from the floor panel of the vehicle. and assembled to the floor panel.

According to the reducing agent injection port structure according to the present invention, it is possible to prevent the reducing agent spilled from the replenishment port during replenishment from solidifying and accumulating.

FIG. 2 is an explanatory diagram showing the configuration of an automobile having a reducing agent injection port structure according to Example 1; FIG. 4 is an explanatory view showing the assembly direction of the reducing agent tank, the replenishing port unit, and the protection unit in the reducing agent injection port structure according to the first embodiment; FIG. 2 is an explanatory view (cross-sectional view taken along the line III-III in FIG. 1) showing the structure in the vicinity of the reducing agent replenishing port in the reducing agent injection port structure according to Example 1; FIG. 3 is an explanatory diagram (corresponding to a cross-sectional view taken along the line IV-IV in FIG. 1) showing the assembly procedure of the supply port unit in the reducing agent injection port structure according to the first embodiment; FIG. 3 is an explanatory diagram (corresponding to a cross-sectional view taken along the line IV-IV in FIG. 1) showing the assembly procedure of the supply port unit in the reducing agent injection port structure according to the first embodiment; FIG. 3 is an explanatory diagram (corresponding to a cross-sectional view taken along the line IV-IV in FIG. 1) showing the assembly procedure of the supply port unit in the reducing agent injection port structure according to the first embodiment; FIG. 3 is an explanatory diagram (corresponding to a cross-sectional view taken along the line IV-IV in FIG. 1) showing the assembly procedure of the supply port unit in the reducing agent injection port structure according to the first embodiment; FIG. 5 is an explanatory view showing the lower surface side of the floor panel with the replenishment port unit assembled in the reducing agent injection port structure according to the first embodiment; FIG. 3 is an explanatory view (corresponding to a cross-sectional view taken along the line III-III in FIG. 1) showing an example in which the assembling structure of the supply port unit and the protection unit in the reducing agent injection port structure according to Example 1 is changed; FIG. 3 is an explanatory view (corresponding to a cross-sectional view taken along the line III-III in FIG. 1) showing an example in which the assembling structure of the supply port unit and the protection unit in the reducing agent injection port structure according to Example 1 is changed;

An embodiment of a reducing agent injection port structure according to the present invention will be described in detail below with reference to the accompanying drawings. Of course, the present invention is not limited to the following examples, and it goes without saying that various modifications are possible without departing from the scope of the present invention.

Embodiment 1 A reducing agent inlet structure according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 5. FIG.

As shown in FIG. 1, a vehicle 1 is provided with a floor panel 11 that constitutes the lower structure of the vehicle (forms the bottom of the vehicle compartment). An exhaust passage (exhaust system) 12 connected to an internal combustion engine is provided, and a reducing agent tank 13 for storing a reducing agent (for example, urea aqueous solution) capable of purifying exhaust gas is provided.

Here, the reducing agent tank 13 constitutes a part of an exhaust purification device that injects a reducing agent into the exhaust system 12 to purify the exhaust gas. The reductant is injected into the exhaust system 12 by a reductant injector that does not. The reducing agent tank 13 includes a heat insulating material, and the reducing agent stored in the reducing agent tank 13 is not affected by the heat of the exhaust system 12 .

As shown in FIGS. 1 and 2, the reducing agent tank 13 is provided with a replenishment pipe 21 and a replenishment port unit 14, which are replenishment paths for replenishing the reducing agent tank 13 with the reducing agent.

The replenishment pipe 21 is a pipe through which the reducing agent can flow, one end of which is connected to the side portion (side surface) of the reducing agent tank 13, and is arranged along the side portion (side surface) of the reducing agent tank 13. , and the other end thereof is connected to a replenishment port of a replenishment port unit 14 located near the side portion (side surface) of the reducing agent tank 13 .

As shown in FIG. 3, the replenishment port unit 14 has a replenishment port 31 to which the reducing agent replenishing device 15 (see the two-dot chain line in FIG. 3) can be attached, and replenishment of the reducing agent is possible. A part of the replenishment port unit 14 (replenishment port 31) is attached to the floor panel 11 from the lower side of the vehicle so that it is positioned above the floor panel 11 through an attachment hole 11a formed in the floor panel 11. there is

By arranging the supply port 31 to protrude above the floor panel 11 in this manner, the user can easily access the supply port 31 from above the floor panel 11 (on the side of the vehicle interior space S1). Replenishment work of the reducing agent can be easily performed. The configuration and procedure for attaching the supply port unit 15 to the floor panel 11 will be described in detail later.

The refueling port unit 14 is arranged from the center in the vehicle width direction toward one side in the vehicle width direction (see FIG. 1), and the replenishment port 31 is located on the center side in the vehicle width direction (the other side in the vehicle width direction). , the right side in FIG. 3) (see FIG. 3). As a result, the user can easily attach the reducing agent supply device 15 to the supply port 31 from a wide space on the central side in the vehicle width direction, and can easily perform the operation of supplying the reducing agent.

3 and 4D, the replenishing port unit 14 includes a reducing agent receiving portion (drain receiving portion) for receiving the reducing agent spilled from the replenishing port 31 and the reducing agent replenishing device 15 when replenishing the reducing agent. ) 32 are provided. The reducing agent receiver 32 is arranged around the supply pipe and has a function of receiving the reducing agent leaked from the supply port. The drain receiving portion 32 is formed in a bucket shape (concave shape) corresponding to the mounting hole 11a. The side wall portion 32b has an inclined portion 32c which is inclined in the radially expanding direction from the upper edge of the side wall portion 32b.

The bottom portion 32 a is provided with a discharge port (drain hole) 33 and a drain pipe 34 for discharging the reducing agent received by the drain receiver 32 . Since the user replenishes the reducing agent by attaching the reducing agent replenishing device 15 to the replenishing port 31 from a wide space on the vehicle width direction center side (the other side in the vehicle width direction), the drain hole 33 is located near the replenishing port 31. It is formed on the other side in the vehicle width direction of the replenishing port 31 , at a position where the reducing agent tends to spill out.
The drain pipe 34 is arranged so that its tip (the end open to the atmosphere) is positioned at a desired position where there is no other member below, and the reducing agent discharged from this drain pipe 34 is , and is discharged without adhering to various members of the vehicle 1 .

As shown in FIG. 2, the reducing agent tank 13 is provided with a vent pipe 22 which is always open to the atmosphere to prevent overpressure and negative pressure in the reducing agent tank 13, a supply pipe 21, and the reducing agent tank 13. A breather pipe 23 is interposed between the supply port unit 14 and prevents the reducing agent from blowing out from the supply port 31 . Therefore, the user can smoothly replenish the reducing agent from the replenishing port 31 to the reducing agent tank 13 .

In the vehicle 1 , the supply port unit 14 , the supply pipe 21 , the vent pipe 22 , the breather pipe 23 , and the drain pipe 34 are located on the side of the reducing agent tank 13 , and the exhaust system 12 and the exhaust system 12 are arranged with respect to the reducing agent tank 13 . It is arranged on the opposite side, that is, in the shadow of the reducing agent tank 13 with respect to the exhaust system 12 .

That is, the heat (radiation) emitted by the exhaust system 12 is not directly applied to the supply port unit 14, the supply pipe 21, the vent pipe 22, the breather pipe 23, and the drain pipe 34. The openings of pipe 34 and breather pipe 23 are not in the high temperature atmosphere near exhaust system 12, but in the low temperature atmosphere away from exhaust system 12 (hidden behind reducing agent tank 13).

Therefore, when replenishing the reducing agent, the reducing agent flowing through the replenishing port unit 14, the replenishing pipe 21, and the vent pipe 22 is not affected by the heat (radiant heat) of the exhaust system 12, and the reducing agent tank 13 and the replenishing port The space in the unit 14 is not affected by exposure to a high-temperature atmosphere (heat of the exhaust system 12) through the openings of the breather pipe 23 and the drain pipe 34.

Further, as shown in FIGS. 4D and 5 , the supply port unit 14 is provided with a fixing bracket 35 for fixing the supply port unit 14 . The fixing bracket 35 is formed to cover the drain receiving portion 32 from the vehicle lower side while avoiding the supply pipe 21, the drain pipe 34, etc., and the guide portion B1 and the screw portion B2 of the bolt B, which will be described later, can be inserted therethrough. bolt holes 35a. The fixing bracket 35 may be fixed to the replenishment port unit 14 (drain receiving portion 32) with an adhesive or a screw (not shown). It may be fixed to the floor panel 11 without using the mounting bracket 35 .

As shown in FIGS. 1 and 2, the vehicle 1 is provided with a protection unit 16 that functions as a cover for the supply port 31 that protrudes upward from the floor panel 11 .

As shown in FIG. 3, the protection unit 16 includes a funnel-shaped reducing agent discharge auxiliary member (cup member) 41 attached in the vicinity (periphery) of the attachment hole 11a, and an upper opening (second and a lid member 43 attached to the opening 41a via a hinge member 42 so as to be openable and closable. The upper opening (second opening) 41a is arranged at a position facing the supply port.

The lower opening (first opening) 41b of the cup member 41 is arranged corresponding to the mounting hole 11a and the drain receiving portion 32, and the drain receiving portion 32 and the lower opening (first opening) 41b of the cup member 41 are arranged. is connected to Here, since the second opening 41a is larger than the first opening 41b, the reducing agent spilled from the replenishment port 31 during replenishment of the reductant flows into the inner surface of the reductant discharge auxiliary member (cup member) 41. By letting it flow well and flowing downward, it falls from the lower opening (second opening) 41b to the drain receiving portion 32 and is collected.

As shown in FIG. 4D, the cup member 41 is provided with a flange portion 41c protruding to the outer periphery in the vicinity of the lower opening portion 41b. to the floor panel 11 is fixed (fixed).

The protection unit 16 is provided with a plurality of (three in this embodiment) bolts B, and the floor panel 11 is formed with bolt holes 11b corresponding to the plurality of bolts B. As shown in FIG. Therefore, when assembling the protection unit 16 to the floor panel 11 from the upper side of the vehicle, a plurality of bolts B are inserted through the plurality of bolt holes 11b, respectively, so that the lower opening 41b of the cup member 41 is aligned with the mounting hole 11a. (same position as the mounting hole 11a).

4D, the cup member 41 is provided with a guide portion 44 that protrudes downward from the inner peripheral surface of the lower opening portion 41b and engages with the side wall portion 32b of the drain receiving portion 32. As shown in FIG. The guide portions 44 are provided at a plurality of locations (for example, three locations) spaced apart in the circumferential direction of the lower opening 41b. The cup member 41 (protection unit 16) and the drain receiver 32 (replenishment port unit 14) are positioned relative to each other by bringing the outer peripheral surfaces of the plurality of guide portions 44 into close contact with the inner peripheral surface of the side wall portion 32b. It has become so.

That is, when assembling the protection unit 16 and the replenishment port unit 14 to the floor panel 11, the protection unit 16 is placed at a predetermined position from the vehicle upper side of the floor panel 11 with the bolt B, and then the protection unit 16 is mounted. Then, the supply port unit 14 is assembled from the vehicle lower side so that the guide portion 44 and the side wall portion 32b are engaged with each other.

At this time, since the protective unit 16 and the supply port unit 14 have a predetermined relative shape and size, the work of assembling the protection unit 16 and the supply port unit 14 to the floor panel 11 becomes easy. there is Specifically, when the supply port unit 14 is assembled to the protection unit 16 positioned at a predetermined position by the fixing bolt B as described above, the position of the supply port unit 14 is changed stepwise (in this embodiment, , four stages) so that the operator can assemble the supply port unit 14 without consciously performing fine positional adjustments. The procedure for assembling the protection unit 16 and the supply port unit 14 to the floor panel 11 will be detailed later.

As shown in FIG. 3, the hinge member 42 is provided at the end of the cup member 41 on one side in the vehicle width direction (the left side in FIG. 3), and the lid member 43 is provided at the center side in the vehicle width direction. The door is opened toward one side in the vehicle width direction (or the other side in the vehicle width direction, which is the right side in FIG. 3).

Therefore, when opening and closing the lid member 43 with respect to the cup member 41, the user can perform the opening and closing operation using the wide space on the center side in the vehicle width direction (without being hindered by side panels, etc., not shown). When replenishing the reducing agent from the replenishing port 31 by the reducing agent replenishing device 15, the wide space on the center side in the vehicle width direction is used (without being obstructed by a side panel or the like, not shown). Actions can be performed (see dashed-two dotted line in FIG. 3).

As shown in FIGS. 3 and 4D, a first seal member 45 is interposed between the floor panel 11 and the cup member 41 to seal the gap between the cup member 41 and the lid member 43. A second sealing member 46 is interposed therebetween to seal the gap.

Therefore, when the lid member 43 is opened with respect to the cup member 41, the user can access the replenishment port 31 and replenish the reducing agent (see the two-dot chain line in FIG. 3). When the member 43 is closed with respect to the cup member 41, the space (replenishment space) S16 in the protection unit 16 can be reliably isolated from the space in the vehicle interior (interior space) S1. The odor of the reducing agent and the reducing agent adhering to the supply port 31 and the like can be kept in the supply space S16, and the odor can be prevented from entering the vehicle interior space S1 (see the solid line in FIG. 3).

Here, the drain receiving portion 32 and the drain hole 33 are provided facing the replenishing space S16 defined by the protection unit 16 together with the replenishing port 31, and when the lid member 43 is closed, the drain receiving portion 32 and the drain hole 33 are provided. The odor of the reducing agent remaining in the drain hole 33 and the like is kept in the supply space S16 and does not enter the vehicle interior space S1.

1 to 5, a description will be given of a procedure for assembling a protection unit and a replenishment port unit to a floor panel in an automobile according to Embodiment 1 of the present invention.

First, the protection unit 16 is placed on the floor panel 11, and the supply port unit 14 is attached to the floor panel 11 and the protection unit 16 so that the supply port 31 is inserted through the mounting hole 11a and the lower opening 41b of the cup member 41. The bolt hole 35a is engaged with the guide portion B1 of the bolt B by approaching from the lower side of the vehicle (see FIG. 4A). As a result, the supply port unit 14 is in a state (first position regulated state) in which it can move only within the range of the difference between the outer diameter of the guide portion B1 and the inner diameter of the bolt hole 35a.

At this time, since the supply port unit 14 is positioned to the side of the reducing agent tank 13 (see FIGS. 1 and 2), the operator must remove the bolt B protruding downward from the floor panel 11 and the supply port unit 14. The above operation (the operation of engaging the bolt hole 35a with the guide portion B1 of the bolt B) can be performed while visually recognizing the mounting surface (bolt hole 35a).

Also, since two bolts B out of the three bolts B are arranged on the vehicle rear side (see FIG. 5), the operator must install the two bolts B arranged on the vehicle rear side and the two bolt holes 35a. can be engaged while visually recognizing the two bolts B and the bolt hole 35a. can be combined.

Next, in the first position regulated state, the operator brings the supply port unit 14 closer to the floor panel 11 and the protection unit 16 (moves from the lower side of the vehicle toward the upper side of the vehicle), and closes the bolt hole 35a. is engaged with the threaded portion B2 of the bolt B, which is larger in diameter than the guide portion B1 (see FIG. 4B). As a result, the replenishment port unit 14 is in a state (second position restricted state) in which it can move only within the range of the difference between the outer diameter of the screw portion B2 and the inner diameter of the bolt hole 35a.

At this time, the inclined portion 32c of the drain receiving portion 32 overlaps with the guide portion 44 in the vertical direction of the vehicle. It is positioned on the upper side of the vehicle with respect to the lower edge of the guide portion 44 .

Note that the difference between the outer diameter of the screw portion B2 and the inner diameter of the bolt hole 35a is smaller (shorter) than the horizontal distance between the guide portion 44 and the inclined portion 32c that overlap in the vertical direction of the vehicle. Even if the unit 14 moves horizontally in the second position regulated state, the guide portion 44 is never positioned radially outside the inclined portion 32c, and is always positioned radially inside the inclined portion 32c. do. In other words, the operator does not have to pay particular attention to the horizontal position of the supply port unit 14 with respect to the protection unit 16 in the second position regulation state, and the bolt hole 35a and the bolt B (the bolt hole 35a and the threaded portion B2) do not have to be particularly careful. (engagement) can be performed while watching only

Next, in the second position regulated state, the operator further brings the supply port unit 14 closer to the floor panel 11 and the protection unit 16 (further moves from the lower side of the vehicle toward the upper side of the vehicle), and moves the side wall portion. 32b is engaged with the guide portion 44 (see FIG. 4C). As a result, the supply port unit 14 is substantially positioned by the engagement of the plurality of guide portions 44 and the side wall portion 32b, and is in a state in which it is possible to move only in the assembly direction (third position regulation state). .

At this time, since the inclined portion 32c is inclined from the upper end edge of the side wall portion 32b in the diameter-expanding direction, the range in which the supply port unit 14 can move in the horizontal direction increases as the vehicle moves upward. By gradually narrowing according to the inclination angle of , the second position regulation state is gradually transformed into the third position regulation state.

Then, in the third position regulated state, the worker further brings the supply port unit 14 closer to the floor panel 11 and the protection unit 16 (further moves from the vehicle bottom side toward the vehicle top side), and moves the supply port unit 14 (the upper edge of the inclined portion 32c and the fixing bracket 35) are brought into contact with the floor panel 11, and the supply port unit 14 (the inclined portion 32c) is brought into close contact with the first seal 45 (see FIG. 4D).

At this time, the replenishment port unit 14 contacts the first seal member 45 in a state (third position regulation state) in which the plurality of guide portions 44 and the side wall portion 32b engage with each other. A lip portion 45a protruding toward the inclined portion 32c of the first seal member 45 comes into contact with the inclined portion 32c in a favorable manner, thereby sealing the gap between the protection unit 16 and the supply port unit 14. It can perform its functions satisfactorily.

Finally, the operator screws the nut N onto the threaded portion B2 of the bolt B to fix the protection unit 16 and the supply port unit 14 to the upper and lower surfaces of the floor panel 11 (see FIG. 4D).

As described above, the worker can easily assemble the protection unit 16 and the supply port unit 14 to the floor panel 11 .

In this embodiment, the supply port unit 14 and the protection unit 16 are fixed to the floor panel 11 by mechanical fastening means of bolts B and nuts N so as to sandwich the floor panel 11 in the vertical direction. .

Of course, the present invention is not limited to the configuration of this embodiment, and the replenishment port unit 14 and the protection unit 16 may be separately fixed to the floor panel 11, or may be fixed by other mechanical fastening means such as rivets. It may be fixed.

In addition, in this embodiment, the first seal 45 is interposed between the floor panel 11 and the protection unit 16 (cup member 41), and extends radially inward of the mounting hole 11a to close the supply port. It is also interposed between the unit 14 and the protection unit 16, and the first seal 45 has the function of sealing between the floor panel 11 and the protection unit 16 (cup member 41) and the replenishment port unit. 14 and the protection unit 16.

Of course, the present invention is not limited to the configuration of this embodiment, and the first sealing member 45 is composed of a plurality of (for example, two) separate sealing members, that is, the floor panel 11 and the protection unit 16 ( The gap between the cup member 41) and the gap between the supply port unit 14 and the protection unit 16 may be sealed with a separate seal member.

In this embodiment, a portion of the floor panel 11 is recessed from the floor surface F of the passenger compartment, and the lower end of the protection unit 16 is recessed from the floor surface F of the floor panel 11. , and the upper end of the protection unit 16 is positioned near the floor surface F.

Of course, the present invention is not limited to the configuration of this embodiment, and as shown in FIG. may be attached to the floor panel 11 in the vicinity of the upper end thereof. Further, as shown in FIG. 7, a part of the floor panel 11 is recessed with respect to the floor surface F of the passenger compartment, and a part of the floor panel 11 is formed in a funnel shape. The portion may be substituted for the cup member 41 in this embodiment. 6 and 7, members having the same functions as those of the present embodiment are denoted by the same reference numerals.

1 vehicle 11 floor panel 11a mounting hole 11b in floor panel bolt hole 12 in floor panel exhaust system 13 reducing agent tank 14 supply port unit 15 reducing agent supply device 16 protection unit 21 supply pipe 22 vent pipe 23 breather pipe 31 supply port 32 drain Receiving portion (reducing agent receiving portion, reducing agent discharging means, position regulating means)
32a Bottom portion 32b of the drain receiving portion Side wall portion (position control means) of the drain receiving portion
32c Inclined part (position control means) in the drain receiving part
33 outlet (drain hole, reducing agent discharge means)
34 drain pipe (reducing agent discharge means)
35 Fixing bracket 35a Bolt hole in fixing bracket (position control means)
41 cup member (reducing agent discharge auxiliary member, isolation means)
41a second opening (upper opening in cup member)
41b first opening (lower opening in cup member)
41c Flange portion 42 Hinge member 43 Lid member (separating means) in cup member
44 guide part (position control means)
45 first sealing member (separating means)
46 Second sealing member (separating means)
B bolt (position control means)
Guide part (position control means) in B1 bolt
Threaded portion of B2 bolt (position control means)
N nut

Claims (5)

A reducing agent inlet structure in a vehicle equipped with an exhaust purification device for injecting a reducing agent into an exhaust passage of an engine to purify exhaust gas,
a reducing agent tank that stores a reducing agent;
a supply pipe connecting a supply port for supplying the reducing agent and the reducing agent tank;
a lid member that covers the supply port and has a hinge member on one side and opens toward the one side;
a reducing agent receiver disposed around the supply pipe and receiving the reducing agent leaked from the supply port;
a discharge port for discharging the reducing agent leaked to the reducing agent receiving portion from the reducing agent receiving portion;
with
A reducing agent inlet structure , wherein the outlet is provided on the other side opposite to the one side with the replenishing pipe inserted into the reducing agent receiving portion interposed therebetween . A second opening having a first opening formed with a first opening into which the replenishing pipe is inserted on one side and a second opening larger than the first opening facing the replenishing port is formed on the other side A reducing agent discharge auxiliary member having
2. The reducing agent inlet structure according to claim 1, wherein the reducing agent receiver is connected to the first opening. 3. The reducing agent inlet structure according to claim 2, wherein the second opening of the reducing agent discharge assisting member is covered with the lid member. The replenishment port is arranged so as to face the upper direction of the vehicle while being moved to one side in the vehicle width direction,
4. The reducing agent inlet structure according to claim 3, wherein the lid member is connected to the reducing agent discharge auxiliary member via a hinge member arranged on the one side in the vehicle width direction. 5. The reducing agent injection port structure according to claim 3, wherein the reducing agent discharge assisting member is formed separately from a floor panel of the vehicle and assembled to the floor panel.

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