KR102371227B1 - Urea solution filler neck device - Google Patents

Abstract

A urea water filler neck device is disclosed. The urea filler neck device according to an embodiment of the present invention includes: a cover mounted on the floor of a vehicle body corresponding to a urea water tank and having a through hole formed therein; a filler neck body disposed under the cover and mounted on the urea tank; an opening/closing cap mounted on the pillar neck body at an upper portion of the through hole and selectively opening and closing the through hole and the pillar neck body; and a sealing member mounted on the pillar neck body in a space formed inside the cover and the pillar neck body to prevent the urea water leaked from the urea water tank from flowing into the interior of the vehicle.

Description

Urea filler neck device {UREA SOLUTION FILLER NECK DEVICE}

The present invention relates to a urea water filler neck device, and more particularly, to a urea water filler neck device installed on the floor of a vehicle body to inject urea water into a urea water tank.

Eco-friendly vehicles are being developed around the world, and the emission standards for automobiles in each country are gradually being strengthened. In addition, due to the regulation of carbon dioxide, vehicle manufacturers are developing eco-friendly diesel vehicles.

The core of diesel vehicle exhaust gas standards is nitrogen oxides and particulate matter. In particular, UREA-SCR is useful for reducing nitrogen oxides emitted from diesel engines of large vehicles.

UREA-SCR injects harmless urea water (urea water) to the exhaust system, and when the injected urea water is converted into ammonia through thermal decomposition, the converted ammonia reacts with nitrogen oxides to convert it into harmless components such as water and nitrogen As a reduction system, a storage system for separately storing urea water is required.

The urea water storage system includes a urea water tank, a pump, an inlet, piping, wiring, and various sensors.

However, in the conventional urea water storage system as described above, the injection port is usually provided next to the fuel filling port, and this makes the filler neck connecting the urea water tank provided at the lower part of the vehicle and the injection port unnecessarily long, thereby complicating the layout, The disadvantage is that the cost increases.

In addition, when strong basic urea water is spit back into the inlet by the pressure of the urea water tank, odors are introduced into the interior of the vehicle and cause discomfort to occupants.

Matters described in this background section are prepared to enhance understanding of the background of the invention, and may include matters that are not already known to those of ordinary skill in the art to which this technology belongs.

Therefore, the present invention was invented to solve the above problems, and the problem to be solved by the present invention is to be mounted on the floor of the vehicle body so as to be directly connected to the urea water tank provided at the lower part of the vehicle body, and the odor of urea water is eliminated. An object of the present invention is to provide a filler neck device for urea water to prevent inflow into the room in advance.

A urea filler neck device according to an embodiment of the present invention for achieving this object is mounted on the floor of a vehicle body corresponding to the urea water tank, the cover having a through hole formed; a filler neck body disposed under the cover and mounted on the urea tank; an opening/closing cap mounted on the pillar neck body at an upper portion of the through hole and selectively opening and closing the through hole and the pillar neck body; and a sealing member mounted on the pillar neck body in a space formed inside the cover and the pillar neck body to prevent the urea water leaked from the urea water tank from flowing into the interior of the vehicle.

The cover may include a flange part connected to the vehicle body; and a connecting portion extending integrally from the lower surface of the flange portion toward the lower portion and contacting the upper portion of the filler neck body.

An upper outer surface of the sealing member may be in contact with an inner upper portion of the connecting part.

The filler neck body may include a filler port on which the opening/closing cap is mounted, and an injection hole formed in the center in the longitudinal direction; a welding flange portion extending integrally from the lower end of the filler port toward the outside in the circumferential direction, the outer peripheral surface of which is welded to the urea water tank; a filler neck integrally extending downward from the lower surface of the welding flange to be located inside the urea tank; a backflow prevention chamber formed between the weld flanges at the top of the filler neck to prevent backflow of urea water from the urea water tank when the urea water is injected; and a membrane provided inside between the welding flange part and the backflow prevention chamber.

A support portion that protrudes upward to correspond to the cover and contacts the cover may be integrally formed on the upper surface of the welding flange portion.

A sub-sealing member may be mounted on the upper end of the support to prevent leakage of urea water between the cover and the filler neck body.

A cross-section of the sub-seal member may be formed in an inverted “U” shape.

At least one discharge hole communicating with the urea water tank to discharge the urea water and gas generated from the urea water is formed in the welding flange part at a position spaced apart in the circumferential direction, and the discharge hole is provided in the support part to communicate with the outside Correspondingly, at least one communication hole may be formed along the circumferential direction.

The discharge hole may include a first discharge hole adjacent to the filler port and communicating with the backflow prevention chamber; and a second discharge hole formed to correspond to the membrane at a position spaced apart from the filler port in a radial direction.

A plurality of the communication holes may be formed to be spaced apart from each other at set intervals along the circumference of the support part.

A support protrusion protruding upward between the first and second discharge holes may be integrally formed on an upper surface of the welding flange portion.

The support protrusion may have a triangular cross-section, and may be formed in a circumferential direction with respect to the filler port.

When the opening/closing cap is mounted to the filler port, a pressing portion may be formed on a lower portion of the opening/closing cap to correspond to the supporting protrusion so as to bring the sealing member into close contact with the supporting protrusion.

The backflow prevention chamber may be formed in a cone shape in which a diameter decreases from an upper portion to a lower portion.

At least one guide protrusion may be formed on an inner circumferential surface of the injection hole in a longitudinal direction.

The sealing member may have an outer peripheral surface of the upper end in contact with the inside of the cover, and an inner peripheral surface of the lower end in contact with the filler neck body, and may be made of a rubber material.

As described above, according to the urea water filler neck device according to the embodiment of the present invention, by installing it on the floor of the vehicle body so as to be directly connected to the urea water tank provided at the lower part of the vehicle body, maintainability is improved, and the connection pipe is removed to layout Simplification and production cost can be reduced.

In addition, by allowing the urea water to directly flow into the urea water tank through the removal of the connecting pipe, the replenishment time of the urea water is shortened, and when the urea water flows back, it is drained to the outside of the vehicle body, thereby improving the cleanliness of the urea water filler neck device and can be maintained.

In addition, it is possible to improve the comfort of the vehicle interior by preventing the odor generated from the urea water and the urea water gas from flowing into the interior of the vehicle in advance from the urea water tank.

Further, by providing a membrane therein to absorb vibrations of the vehicle body, it is possible to improve riding comfort.

1 is a partially cut-away perspective view of a urea filler neck device according to an embodiment of the present invention.
2 is a cross-sectional view of a urea filler neck device according to an embodiment of the present invention.
3 is an enlarged view of part A of FIG. 2 .
4 and 5 are diagrams showing the use of the urea filler neck device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

Prior to this, the configurations shown in the embodiments and drawings described in the present specification are only the most preferred embodiment of the present invention and do not represent all of the technical spirit of the present invention, so they can be substituted at the time of the present application It should be understood that various equivalents and modifications may exist.

In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

Since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the bar shown in the drawings, and the thickness is enlarged to clearly express various parts and regions.

And throughout the specification, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

In addition, terms such as "...unit", "...means", "...part", and "...member" described in the specification refer to a unit of a comprehensive configuration that performs at least one function or operation. it means.

1 is a partially cut-away perspective view of a urea filler neck device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a urea number filler neck device according to an embodiment of the present invention, and FIG. 3 is a portion A of FIG. is an enlarged view.

Referring to the drawings, the urea water filler neck device 100 according to the embodiment of the present invention is mounted on the floor of the vehicle body 10 so as to inject urea water into the urea water tank 20 formed on one side of the fuel tank. It is connected to the urea water tank (20).

As shown in FIGS. 1 to 3 , the urea filler neck device 100 includes a cover 110 , a pillar neck body 120 , an opening/closing cap 140 , and a sealing member 150 .

First, the cover 110 is selectively detachably mounted on the floor of the vehicle body 10 in correspondence to the urea water tank 20 . A through hole 112 is formed in the center of the cover 110 .

Here, the cover 110 includes a flange portion 114 and a connection portion 116 .

First, the flange part 114 is connected to the vehicle body 10 . In addition, the connection part 116 integrally extends downward from the lower surface of the flange part 114 , and is in contact with the pillar neck body 120 .

The cover 110 configured in this way may be detachably mounted to the vehicle body 10 . Accordingly, when the maintenance work of the urea water tank 20 or the pillar neck body 120 is required, the cover 110 can be easily detached from the vehicle body 10 .

In this embodiment, the filler neck body 120 is disposed under the cover 110 , and is mounted on the urea water tank 20 .

The filler neck body 120 may include a filler port 122 , a weld flange portion 124 , a filler neck 131 , a backflow prevention chamber 132 , and a membrane 133 .

First, the filler port 122 has the opening/closing cap 140 mounted thereon, and an injection hole 121 is formed in the center in the longitudinal direction.

The filler port 122 is positioned above the filler neck body 120 to correspond to the through hole 112 .

Here, at least one guide protrusion 123 may be formed on the inner circumferential surface of the injection hole 121 in the longitudinal direction.

The guide protrusion 123 is in contact with the outer circumferential surface of the urea water replenishment gun 170 when the urea water replenishment gun 170 injected into the injection hole 121 is inserted or separated, and the urea water replenishment gun 170 ) can be guided stably.

In the present embodiment, the welding flange portion 124 integrally extends from the lower end of the filler port 121 toward the outside in the circumferential direction, and the outer circumferential surface is welded to the urea water tank 20 .

That is, the welding flange portion 124 may be integrally bent from the pillar port 121 perpendicular to the pillar port 121 .

Here, on the upper surface of the welding flange part 124 , a support part 125 integrally protrudes toward the upper surface corresponding to the connection part 116 of the cover 110 . The support part 125 may have an inner peripheral surface in contact with the outside of the lower end of the connection part 116 .

That is, when the cover 110 is mounted on the vehicle body 10 , the lower end of the connection part 116 is partially inserted into the support part 125 .

At least one discharge hole communicating with the urea water tank 20 to discharge urea water and gas generated from the urea water is formed in the welding flange portion 1 configured as described above at positions spaced apart in the circumferential direction.

The discharge hole includes a first discharge hole 126 communicating with the backflow prevention chamber 132 close to the filler port 122 and the membrane 133 at a position radially spaced apart from the filler port 122 . ) may include a second discharge hole 127 formed to correspond to the.

The first discharge hole 126 discharges urea water or gas from the urea water tank 20 to the outside of the urea water tank 20 . And the second discharge hole 127 may discharge the urea gas to the outside of the urea water tank (20).

Meanwhile, in the present embodiment, at least one communication hole 128 may be formed in the support part 125 in a circumferential direction corresponding to the first and second discharge holes 126 and 127 to communicate with the outside. there is.

A plurality of communication holes 128 are formed by being spaced apart from each other at set intervals along the circumference of the support part 125 . Accordingly, the urea water or urea water gas discharged from the first and second discharge holes 126 and 127 may be discharged to the outside of the filler neck body 120 through the communication hole 128 .

That is, the communication hole 128 transmits urea water or urea water gas to the vehicle body so that the urea water or water gas discharged from the first and second discharge holes 126 and 127 does not flow into the vehicle interior. 10) is discharged from the lower part to the outside.

In this embodiment, the filler neck 131 is integrally extended from the lower surface of the welding flange part 124 toward the lower side so as to be positioned inside the urea water tank 20 .

The backflow prevention chamber 132 is formed between the welding flange portions 124 above the filler neck 131 to prevent backflow of the urea water from the urea water tank 20 when the urea water is injected.

The backflow prevention chamber 132 is formed in a cone shape whose diameter decreases from the top to the bottom. That is, the backflow prevention chamber 132 forms an extended space between the filler port 122 and the filler neck 131 . In this space, when the urea water flows back from the urea water tank 20 through the filler neck 131 , it is possible to prevent the reversed urea water from being discharged to the filler port 122 .

In addition, the membrane 133 is provided between the welding flange part 124 and the backflow prevention chamber 132 . The membrane 133 may be formed in a ring shape.

The membrane 133 configured as described above may prevent the vibration generated from the urea water tank 20 from being transmitted to the vehicle body 10 while driving.

In this embodiment, the opening/closing cap 140 is mounted on the filler port 122 of the filler neck body 120 at the upper portion of the through hole 112 . The opening/closing cap 140 may selectively open and close the through hole 112 and the injection hole 121 of the filler port 122 .

That is, when the urea water is injected into the urea water tank 20 , the opening/closing cap 140 opens the injection hole 121 together with the through hole 112 while being removed from the filler port 122 . do.

In addition, the sealing member 150 is mounted to the filler port 122 in a space formed inside between the connection part 116 and the filler port 122 . The sealing member 150 may prevent the urea water leaking from the urea water tank 20 from flowing into the interior of the vehicle.

Here, the outer peripheral surface of the upper end of the sealing member 150 is in contact with the upper inner surface of the connection portion (116). In addition, the inner peripheral surface of the lower end of the sealing member 150 may be in contact with the lower outer surface of the filler port 122 . This sealing member 150 may be a rubber material.

In this embodiment, the support protrusion 129 protruding upward between the first and second discharge holes 126 and 127 may be integrally formed on the upper surface of the welding flange part 124 .

The support protrusion 129 has a triangular cross-section, and is formed along the circumferential direction around the filler port 122 .

Here, when the opening and closing cap 140 is mounted to the filler port 122 at the lower portion of the opening and closing cap 140 , the lower inner side of the sealing member 150 is in close contact with the support protrusion 129 . A pressing portion 142 may be formed to correspond to the support protrusion 124 .

The pressing part 142 is in close contact with the sealing member 150 to the support protrusion 129 , so that urea water or urea water gas flows through the first discharge hole 126 to the outside of the urea water tank 20 . discharge can be prevented.

Meanwhile, in the present embodiment, a sub-seal member 160 may be mounted on the upper end of the support part 125 to prevent leakage of urea water between the connection part 116 and the pillar neck body 120 .

A cross-section of the sub-seal member 160 is formed in an inverted “U” shape. This sub-seal member 160 may be a rubber material.

Accordingly, the connection part 116 and the support part 125 are sealed through the sub-seal member 150 to prevent leakage of urea water between the filler neck body 120 connected to the cover 110 . can be prevented in advance.

Hereinafter, the operation and operation of the urea filler neck device 100 according to an embodiment of the present invention configured as described above will be described in detail.

4 and 5 are diagrams showing the use of the urea filler neck device according to an embodiment of the present invention.

First, referring to FIG. 4 , when urea water is not injected into the urea water tank 20 , the opening/closing cap 140 is mounted on the filler port 122 at the upper portion of the through hole 112 . to keep

Accordingly, the through hole 112 and the injection hole 121 are closed. At the same time, the pressing part 142 of the opening/closing cap 140 brings the sealing member 150 into close contact with the support protrusion 129 so that the first discharge hole 126 is closed.

Then, the urea water gas generated inside the urea water tank 20 is discharged through the second discharge hole 127, and is smoothly discharged to the outside through the communication hole 128 without entering the vehicle interior. .

Here, when the urea water tank 20 is shaken due to the vibration generated while the vehicle is driving, the membrane 133 causes the flow of urea water due to the shaking of the urea water tank 20 to the second discharge hole ( 127) to prevent it from being discharged. In addition, the membrane 133 may absorb the vibration of the urea water tank 20 to prevent the vibration from being transmitted to the vehicle body 10 .

On the other hand, when injecting urea water into the urea water tank 20 , as shown in FIG. 5 , the operator removes the opening/closing cap 140 from the filler port 122 .

Then, the through hole 112 and the injection hole 121 are opened. At the same time, the first discharge hole 126 is in an open state together with the second discharge hole 127 .

In this state, the urea water replenishment gun 170 is inserted into the injection hole 121 of the filler port 122 , and urea water is added to the urea water tank 20 from the upper portion spaced apart from the filler neck 131 . inject

At this time, when the urea water backflows from the urea water tank 20 , it is possible to prevent the backflowed urea water from being discharged to the filler port 122 through the expanded space formed by the backflow prevention chamber 132 . .

On the other hand, when urea water is injected, urea gas or urea water generated inside the urea water tank 20 is discharged through the first and second discharge holes 126 and 127 that are opened, and is discharged into the vehicle interior. It is smoothly discharged to the outside through the communication hole 128 without inflow.

Therefore, when the urea water filler neck device 100 according to the embodiment of the present invention configured as described above is applied, the urea water filler neck device 100 is directly connected to the urea water tank 20 provided under the vehicle body 10 . By installing it on the floor of the vehicle body 10, it is possible to improve the maintainability, and to simplify the layout and reduce the manufacturing cost by removing the connecting pipe.

In addition, by allowing the urea water to directly flow into the urea water tank 20 through the removal of the connection pipe, the replenishment time of the urea water is shortened, and when the urea water flows back, the urea water is drained to the outside of the vehicle body 10 It is possible to improve and maintain the cleanliness of the male pillar neck device 100 .

In addition, it is possible to improve the comfort of the vehicle interior by preventing the odor generated from the urea water and urea water gas from flowing into the interior of the vehicle in advance from the urea water tank 20 .

Further, by providing the membrane 133 therein to absorb vibrations of the vehicle body, it is possible to improve riding comfort.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

100: urea number filler neck device
110: cover
112: through hole
114: flange part
116: connection part
120: filler neck body
121: injection hole
122: filler port
123: guide turn
124: welding flange part
125: support
126: first discharge hole
127: second discharge hole
128: communication hole
129: support projection
131: filler neck
132: non-return chamber
133: membrane
140: opening and closing cap
142: press
150: seal member
160: sub-seal member
170: Replenishment of the number of urea

Claims (16)

a cover mounted on the floor of the vehicle body corresponding to the urea water tank and having a through hole formed therein;
a filler neck body disposed under the cover and mounted on the urea tank;
an opening/closing cap mounted on the pillar neck body at an upper portion of the through hole and selectively opening and closing the through hole and the pillar neck body; and
a sealing member mounted on the pillar neck body in a space formed inside the cover and the pillar neck body and preventing the urea water leaking from the urea water tank from flowing into the interior of the vehicle;
The number of urea filler neck device comprising a. According to claim 1,
the cover is
a flange part connected to the vehicle body; and
a connection part extending from a lower surface of the flange part toward a lower part and in contact with an upper part of the filler neck body;
The number of urea filler neck device comprising a. 3. The method of claim 2,
The upper outer surface of the sealing member is
Urea filler neck device, characterized in that in contact with the inner upper portion of the connection portion. According to claim 1,
The filler neck body is
a filler port on which the opening/closing cap is mounted and having an injection hole formed in the center in the longitudinal direction;
a welding flange portion extending integrally from the lower end of the filler port toward the outside in the circumferential direction, the outer peripheral surface of which is welded to the urea water tank;
a filler neck integrally extending downward from the lower surface of the welding flange to be positioned inside the urea tank;
a backflow prevention chamber formed between the weld flanges at the top of the filler neck to prevent backflow of urea water from the urea water tank when the urea water is injected; and
a membrane provided inside the welding flange portion and the backflow prevention chamber;
The number of urea filler neck device comprising a. 5. The method of claim 4,
On the upper surface of the welding flange
The urea filler neck device, characterized in that the support portion which protrudes upward to correspond to the cover and is in contact with the cover is integrally formed. 6. The method of claim 5,
At the top of the support
A sub-seal member is mounted to prevent leakage of urea water between the cover and the filler neck body. 7. The method of claim 6,
The cross-section of the sub-seal member is
The number of elements filler neck device, characterized in that formed in an inverted “U” shape. 6. The method of claim 5,
At least one discharge hole communicating with the urea water tank to discharge the urea water and the gas generated from the urea water is formed in the welding flange portion at a position spaced apart in the circumferential direction,
At least one communication hole is formed in the support part in a circumferential direction to correspond to the discharge hole so as to communicate with the outside. 9. The method of claim 8,
The exhaust hole is
a first discharge hole adjacent to the filler port and communicating with the backflow prevention chamber;
a second discharge hole formed to correspond to the membrane at a position spaced apart from the filler port in a radial direction;
The number of urea filler neck device comprising a. 9. The method of claim 8,
The communication hole is
The number of urea filler neck device, characterized in that a plurality are formed spaced apart at a set interval along the circumference of the support part. 9. The method of claim 8,
On the upper surface of the welding flange
The urea filler neck device, characterized in that the support protrusion protruding upwardly between the first and second discharge holes is integrally formed. 12. The method of claim 11,
The support protrusion
The urea filler neck device, characterized in that the cross-section is formed in a triangular shape and is formed along the circumferential direction with the filler port as the center. 12. The method of claim 11,
The lower part of the opening and closing cap is
When the opening and closing cap is mounted on the filler port, the urea filler neck device, characterized in that the pressing portion is formed in correspondence with the support projection to bring the sealing member into close contact with the support projection. 5. The method of claim 4,
The backflow prevention chamber is
A urea filler neck device, characterized in that it is formed in a cone shape whose diameter decreases from the top to the bottom. 5. The method of claim 4,
On the inner circumferential surface of the injection hole,
A urea filler neck device, characterized in that at least one guide projection is formed in the longitudinal direction. According to claim 1,
The sealing member is
The urea filler neck device, characterized in that the outer peripheral surface of the upper part is in contact with the inside of the cover, the inner peripheral surface of the lower part is in contact with the filler neck body, and is made of a rubber material.

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