CN214822590U - Fuel evaporation and discharge system of light commercial vehicle - Google Patents
Fuel evaporation and discharge system of light commercial vehicle Download PDFInfo
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- CN214822590U CN214822590U CN202120053393.8U CN202120053393U CN214822590U CN 214822590 U CN214822590 U CN 214822590U CN 202120053393 U CN202120053393 U CN 202120053393U CN 214822590 U CN214822590 U CN 214822590U
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Abstract
The utility model discloses a light-duty commercial car fuel evaporation discharge system. The fuel tank assembly comprises a fuel tank assembly provided with a liquid level sensor and a filling port, a carbon tank and a fuel vapor outlet pipeline, and further comprises a sealing ring and an annular fixing clamp which are in interference fit with a fuel filling gun, wherein the sealing ring and the annular fixing clamp are both arranged in the filling port. The outside of annular fixing clip is equipped with two at least protruding structures, is equipped with annular groove and two at least shrinkage pools on the filler neck inner wall, and the sealing ring closely extrudees with annular groove and links to each other, and protruding structure card is gone into in the shrinkage pool. The system has the advantages that the filling is convenient, the appearance is neat, the sealing between the filling port and the oil filling gun is tight during the filling, and the air pollution caused by the leakage of fuel steam through the filling port is effectively avoided; in addition, when the oil gun is inserted into the filling port, the U-shaped sealing ring structure can be deformed and is not easy to wear, and the trouble of maintenance is avoided.
Description
Technical Field
The utility model relates to a commercial car gasoline engine fuel evaporation technical field specifically indicates a light-duty commercial car fuel evaporation discharge system.
Background
With the rapid development of the automobile industry in recent years, the national enactment and enforcement of emission regulations is becoming stricter. The evaporative emission detection requirements of the fuel tank of the national six-stage gasoline vehicle are as follows: in the fuel oil filling process of the whole vehicle, a filling system must be sealed to prevent fuel oil vapor from volatilizing from a filling opening part to cause atmospheric pollution.
In the existing light commercial vehicle, the fuel evaporation and discharge system of part of the commercial vehicle adopts a hydraulic sealing structure design, and the fuel evaporation and discharge system of part of the commercial vehicle adopts a mechanical sealing structure design. The light commercial vehicle of the hydraulic sealing fuel evaporation discharge system has the advantages that the fuel tank is arranged at a higher position, a certain height difference is formed between the fuel tank and the fuel tank, and the fuel filling port fixed on a vehicle body needs to be correspondingly increased, so that the height of the fuel filling port exceeds the normal operation range of a fuel filling gun, the fuel filling is inconvenient, and a metal fuel filling pipeline connected between the fuel filling port and the fuel tank is not attractive. The light commercial vehicle of the mechanical seal fuel evaporation discharge system has the advantages that the fuel filling port is directly arranged on the side face of the fuel tank, so that the height of the fuel filling port is within the normal operation range of a fuel filling gun, filling is very convenient, a metal fuel filling pipeline for connecting the filling port and the fuel tank is omitted, the appearance is more attractive, but in the mechanical seal fuel evaporation discharge system in the prior art, the seal rubber sheet in the fuel filling port is not tight in seal and is easy to wear.
Disclosure of Invention
The utility model aims at providing a filling is convenient, and is sealed tight, and the sealing member is difficult to wearing and tearing and the light-duty commercial car fuel evaporation discharge system that the appearance is pleasing to the eye.
In order to realize the above purpose, the utility model discloses a light-duty commercial car fuel evaporation discharge system, including fuel tank assembly, carbon tank and the fuel vapor outlet pipe way that is equipped with level sensor and filler, the first outlet pipe way of fuel vapor that fuel vapor outlet pipe way one end links to each other with level sensor and the fuel vapor second outlet pipe way that one end links to each other with engine assembly constitute, the other end that the first outlet pipe way of fuel vapor and fuel vapor second outlet pipe way all link to each other with the carbon tank, and its special character lies in: still include and be interference fit's sealing ring and annular fixing clip with the nozzle, sealing ring and annular fixing clip all set up in the filler, the outside of annular fixing clip is equipped with two at least protruding structures, be equipped with annular groove and two at least shrinkage pools on the filler inner wall, the sealing ring closely extrudees with annular groove and links to each other, protruding structure card is gone into in the shrinkage pool.
The fuel vapor filled into the fuel tank assembly enters the carbon tank through the liquid level sensor and the first fuel vapor outlet pipeline and is stored in the carbon tank. In the running process of the light commercial vehicle, the fuel vapor stored in the carbon tank enters the engine through the second fuel vapor outlet pipeline and is combusted to provide energy.
The filling port is directly arranged on the fuel tank assembly, so that a metal filling pipeline connected between the filling port and the fuel tank assembly is saved, and the appearance of the whole fuel evaporation and emission system is tidier and more attractive.
The sealing ring in the filling port is matched with the annular fixing clip to form a sealing structure at the filling port. In addition, the inner diameter of the sealing ring is slightly smaller than the outer diameter of the oil gun, and the sealing ring is in interference fit with the oil gun, so that fuel steam is prevented from leaking through a filling port and entering the atmosphere to cause environmental pollution in the filling process of the oil gun.
Furthermore, the sealing ring is of a U-shaped structure along the axial cross section, the two sides of the opening of the U-shaped structure are respectively provided with an outer abutting edge and an inner abutting edge along the axial direction, one side of the annular fixing clamp is provided with an annular boss along the axial direction, an annular gap is formed between the inner wall of the filling port and the annular boss, the outer abutting edge and the inner abutting edge are respectively located in the annular groove and the annular gap, and the outer abutting edge and the inner abutting edge are respectively closely extruded and connected with the annular groove and the annular gap to form a sealing structure.
The fillet structure on the U type base of sealing ring and oil gun contact department does not have the dangling limit, and collision sealing ring when the oil gun inserts, circular arc structure can warp the compression and difficult the collision breakage, the life of extension sealing ring.
Furthermore, the convex structure is an inverted triangle structure matched with the concave hole.
After the annular fixing clip is assembled, the inverted triangular structure on the outer side of the annular fixing clip falls into the concave hole on the inner wall of the filling port to form an agnail, and the annular fixing clip is prevented from falling off.
Further, the at least two protruding structures are symmetrically arranged on the outer side of the annular fixing clamp, and the at least two concave holes are symmetrically arranged on the inner wall of the filling opening.
Two symmetrical barb structures formed on the annular fixing clip not only extrude the outer abutting edge on one side of the sealing ring into the annular groove, but also press the inner abutting edge on the other side of the sealing ring into an annular gap formed between the annular boss and the inner wall of the filling port, so that the whole sealing ring is fixed and sealed.
Compare with current hydraulic seal fuel evaporation discharge system, the utility model provides a light-duty commercial car fuel evaporation discharge system annotates conveniently, has saved the oil pipe way that adds, and the appearance is pleasing to the eye, has practiced thrift manufacturing cost.
Compare with current mechanical seal fuel evaporative emission system, the utility model provides a light-duty commercial car fuel evaporative emission system has following beneficial effect: the sealing between the filling port and the fuel filling gun is tight, so that the air pollution caused by the fact that fuel steam leaks through the filling port and enters the atmosphere is effectively avoided; in addition, when the oil gun is inserted into the filling port, the U-shaped sealing ring structure can be deformed and is not easy to wear, and the trouble of maintenance is avoided.
The utility model discloses a light-duty commercial car fuel evaporation discharge system is applicable to the light-duty commercial car motorcycle type that can't arrange hydraulic seal.
Drawings
FIG. 1 is a schematic top view of a fuel evaporative emissions system for a light-duty commercial vehicle.
Fig. 2 is a schematic view of the filler neck of fig. 1 viewed from the inside to the outside.
Fig. 3 is a schematic structural view of the fixing clip in fig. 2 from inside to outside.
FIG. 4 is a schematic view of a partial cross-sectional structure of the filling port in FIG. 2, wherein the inner wall of the filling port is cut at two symmetrical raised structures on the outer side of the annular fixing clip along the axial direction.
Fig. 5 is a schematic view of a partial cross-sectional structure of the filling port inner wall and the annular fixing clip in fig. 2, which are cut at two symmetrical protruding structures on the outer side of the annular fixing clip along the axial direction.
Fig. 6 is a schematic structural view of a part of the cross section of the filling port inner wall, the annular fixing clip and the U-shaped sealing ring in fig. 2, which are cut at two symmetrical protruding structures at the outer side of the annular fixing clip along the axial direction.
In the figure:
a fuel tank assembly 1 (wherein, a liquid level sensor 1-1 and a filling port 1-2),
A filling port 1-2 (wherein, the annular groove 1-21 and the concave hole 1-22),
A carbon tank 2,
A fuel vapor outlet pipeline 3 (wherein, a first fuel vapor outlet pipeline 3-1 and a second fuel vapor outlet pipeline 3-2),
A sealing ring 4 (wherein, an outer abutting edge 4-1 and an inner abutting edge 4-2),
An annular fixing clip 5 (wherein, the convex structure 5-1, the annular boss 5-2 and the annular gap 5-3).
Detailed Description
The invention will be described in further detail with reference to the following drawings and specific embodiments:
the fuel evaporation and discharge system of the light commercial vehicle shown in the figures 1-6 comprises a liquid level fuel tank assembly 1, a carbon tank 2 and a fuel vapor outlet pipeline 3. The fuel tank assembly 1 includes a sensor 1-1 and a fill port 1-2. The fuel vapor outlet pipeline 3 comprises a fuel vapor first outlet pipeline 3-1 and a fuel vapor second outlet pipeline 3-2, wherein one end of the fuel vapor first outlet pipeline 3-1 is connected with the liquid level sensor 1-1, and the other end of the fuel vapor first outlet pipeline is connected with the carbon tank 2; one end of the second fuel vapor outlet pipeline 3-2 is connected with the engine assembly, and the other end is connected with the carbon tank 2.
The fuel vapor filled into the fuel tank assembly 1 passes through the liquid level sensor 1-1, enters the carbon tank 2 through the first fuel vapor outlet pipeline 3-1, and is stored in the carbon tank 2. When the light commercial vehicle runs, the fuel vapor stored in the carbon tank 2 is guided into the engine assembly through the fuel vapor second outlet pipeline 3-2 and combusted.
The filling port 1-2 of the fuel evaporation and discharge system of the light commercial vehicle is a non-hydraulic sealing structure, so that the filling port 1-2 does not need to be arranged on a vehicle body, and a metal fuel filling pipeline does not need to be arranged between the filling port 1-2 and a fuel tank assembly 1. A filling port 1-2 is arranged on the side surface of the fuel tank assembly 1, and the filling port 1-2 adopts a mechanical sealing structure.
As the filling port 1-2 is directly arranged on the fuel tank assembly 1, a metal filling pipeline connected between the filling port 1-2 and the fuel tank assembly 1 is saved, and the appearance of the whole fuel evaporative emission system is tidier and more attractive.
The inner wall of the filling port 1-2 is provided with an annular groove 1-21 and two concave holes 1-22. A sealing ring 4 and an annular fixing clip 5 are also arranged in the filling port 1-2, and the sealing ring 4 is tightly extruded and connected with the annular groove 1-21.
The section of the sealing ring 4 along the axial direction is of a U-shaped structure, and the two sides of the opening of the U-shaped structure are respectively provided with an outer abutting edge 4-1 and an inner abutting edge 4-2 along the axial direction. The inner diameter of the sealing ring 4 is slightly smaller than the outer diameter of the oil gun, and the sealing ring 4 is in interference fit with the oil gun, so that fuel steam is prevented from leaking through the filling port 1-2 and entering the atmosphere to cause environmental pollution in the filling process of the oil gun.
Two convex structures 5-1 are symmetrically arranged on the outer side of the annular fixing clamp 5, two concave holes 1-22 are symmetrically arranged on the inner wall of the filling port 1-2, and the convex structures 5-1 are inverted triangular structures matched with the concave holes 1-22.
One side of the annular fixing clip 5 is also provided with an annular boss 5-2 along the axial direction, and an annular gap 5-3 is formed between the inner wall of the filling port 1-2 and the annular boss 5-2. The outer abutting edge 4-1 and the inner abutting edge 4-2 are respectively positioned in the annular groove 1-21 and the annular gap 5-3.
When the sealing device is installed, the outer abutting edge 4-1 of the U-shaped sealing ring 4 is firstly extruded into the annular groove 1-21 on the inner wall of the filling port 1-2, then the annular boss 5-2 on the annular fixing clip 5 presses the inner abutting edge 4-2, so that the inner abutting edge 4-2 is extruded into the annular gap 5-3, the annular fixing clip 5 is slightly rotated, two convex structures 5-1 on the outer side of the annular fixing clip 5 are rotated to the corresponding two concave holes 1-22 on the inner wall of the filling port 1-2, the two convex structures 5-1 are clamped into the corresponding two concave holes 1-22, and at the moment, the outer abutting edge 4-1 and the inner abutting edge 4-2 can be respectively and tightly extruded and connected with the annular groove 1-21 and the annular gap 5-3.
When the convex structure 5-1 of the inverted triangle structure falls into the concave hole 1-22 on the inner wall of the filling port 1-2, an agnail is formed, the agnail structure not only prevents the annular fixing clip 5 from falling off from the inside of the filling port 1-2, but also can tightly extrude the U-shaped sealing ring 4 between the annular groove 1-21 and the annular gap 5-3, and thus, the fixing and the sealing of the whole U-shaped sealing ring 4 are realized.
When in refueling, a refueling gun is inserted into the refueling port 1-2, the refueling gun is tightly attached by the U-shaped sealing ring 4, zero contact is realized between the sealing ring 4 and the refueling gun, and steam in the fuel tank is sealed in the refueling port and cannot leak through the refueling port to enter the atmosphere, so that air pollution is caused.
The fuel evaporation and discharge system of the light commercial vehicle has convenient filling and neat appearance, and when the fuel is filled, the sealing between the filling port and the fuel filling gun is tight, thereby effectively avoiding the air pollution caused by the leakage of fuel vapor through the filling port; in addition, when the oil gun is inserted into the filling port, the U-shaped structure of the sealing ring can be deformed, so that the sealing ring is not easy to wear, and the trouble of maintenance is avoided.
Claims (4)
1. The utility model provides a light-duty commercial car fuel evaporation discharge system, is including fuel tank assembly (1), carbon tank (2) and fuel vapour gas outlet pipe way (3) that are equipped with level sensor (1-1) and filler (1-2), fuel vapour gas outlet pipe way (3) are gone out by the first gas outlet pipe way of fuel vapour (3-1) that one end and level sensor (1-1) link to each other and fuel vapour second gas outlet pipe way (3-2) that one end and engine assembly link to each other and are constituteed, the other end of the first gas outlet pipe way of fuel vapour (3-1) and fuel vapour second gas outlet pipe way (3-2) all links to each other with carbon tank (2), its characterized in that: still include and be interference fit's sealing ring (4) and annular fixing clip (5) with the nozzle, sealing ring (4) and annular fixing clip (5) all set up in filling mouth (1-2), the outside of annular fixing clip (5) is equipped with two at least protruding structures (5-1), be equipped with annular groove (1-21) and two at least shrinkage pools (1-22) on filling mouth (1-2) inner wall, sealing ring (4) closely extrude with annular groove (1-21) and link to each other, protruding structure (5-1) card is gone into in shrinkage pool (1-22).
2. A light commercial vehicle fuel evaporative emissions system as set forth in claim 1 wherein: the sealing ring (4) is of a U-shaped structure along the axial cross section, an outer abutting edge (4-1) and an inner abutting edge (4-2) are respectively arranged on two sides of an opening of the U-shaped structure along the axial direction, an annular boss (5-2) is arranged on one side of the annular fixing clamp (5) along the axial direction, an annular gap (5-3) is formed between the inner wall of the filling port (1-2) and the annular boss (5-2), and the outer abutting edge (4-1) and the inner abutting edge (4-2) are respectively located in the annular groove (1-21) and the annular gap (5-3).
3. A light commercial vehicle fuel evaporative emissions system as set forth in claim 2 wherein: the convex structures (5-1) are inverted triangular structures matched with the concave holes (1-22).
4. A light commercial vehicle fuel oil evaporation and discharge system according to any one of claims 1-3, characterized in that: the at least two protruding structures (5-1) are symmetrically arranged on the outer side of the annular fixing clamp (5), and the at least two concave holes (1-22) are also symmetrically arranged on the inner wall of the filling port (1-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120053393.8U CN214822590U (en) | 2021-01-08 | 2021-01-08 | Fuel evaporation and discharge system of light commercial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120053393.8U CN214822590U (en) | 2021-01-08 | 2021-01-08 | Fuel evaporation and discharge system of light commercial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214822590U true CN214822590U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120053393.8U Active CN214822590U (en) | 2021-01-08 | 2021-01-08 | Fuel evaporation and discharge system of light commercial vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214822590U (en) |
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2021
- 2021-01-08 CN CN202120053393.8U patent/CN214822590U/en active Active
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