CN113944792B - Valve for ventilation system of automobile fuel tank - Google Patents
Valve for ventilation system of automobile fuel tank Download PDFInfo
- Publication number
- CN113944792B CN113944792B CN202111194756.0A CN202111194756A CN113944792B CN 113944792 B CN113944792 B CN 113944792B CN 202111194756 A CN202111194756 A CN 202111194756A CN 113944792 B CN113944792 B CN 113944792B
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- Prior art keywords
- oil
- upper cover
- valve
- arc
- fuel tank
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- 238000009423 ventilation Methods 0.000 title claims abstract description 20
- 239000002828 fuel tank Substances 0.000 title claims abstract description 19
- 230000000903 blocking effect Effects 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 230000003116 impacting effect Effects 0.000 claims abstract description 3
- 238000013022 venting Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Abstract
The invention provides a valve for an automobile fuel tank ventilation system, which comprises an upper cover and a valve body, wherein the upper cover is arranged at the top of the valve body, and the top is provided with an oil leakage hole; an air passage is arranged on one side of the upper cover, and a closed space communicated with the air passage is arranged between the inner wall and the top of the upper cover; the inner wall of the upper cover is provided with a first blocking part extending towards the direction close to the top, and the first blocking part is used for impacting the oil-gas mixture splashed in the oil leakage hole; a second blocking part for blocking leaked oil liquid from entering the air passage is arranged on the top; the top is of an inverted cone structure, and the oil leakage hole is positioned in the middle of the top; the first blocking part comprises an arc-shaped plate, and the arc-shaped plate is covered above the oil leakage hole. The invention can make the valve have the oil-gas separation function, so that an oil-gas separation mechanism does not need to be arranged in the ventilation system of the automobile fuel tank, thereby saving the space better, avoiding increasing parts and reducing the cost and the complexity of the ventilation system arrangement.
Description
Technical Field
The invention belongs to the technical field of automobile fuel tank ventilation systems, and particularly relates to a valve for an automobile fuel tank ventilation system.
Background
During dynamic driving of the vehicle, such as rapid shifting, cornering or bumpy road surfaces, there is a possibility that liquid fuel flows out of the valve and eventually into the canister, so that the canister adsorption capacity is reduced, and even breakdown of the canister may be caused.
At present, a mode of adding an oil-gas separation mechanism between an oil tank and a carbon tank is generally adopted in the industry to reduce leakage of dynamic fuel, and the following problems exist in the mode:
1. the system cost is increased, and additional parts are required to be added;
2. The oil-gas separation mechanism is added independently, extra space is needed for arrangement, the space arrangement allowance of the vehicle body and the chassis is tension, and the extra oil-gas separation mechanism can greatly increase the complexity of system arrangement.
Therefore, there is an urgent need to develop a valve to solve the dynamic leakage problem of the fuel system.
Disclosure of Invention
The invention aims to provide a valve for an automobile fuel tank ventilation system, which aims to solve the technical problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The valve for the ventilation system of the automobile fuel tank comprises an upper cover and a valve body, wherein the upper cover is arranged at the top of the valve body, and the top of the valve body is provided with an oil leakage hole; an air passage is arranged on one side of the upper cover, and a closed space communicated with the air passage is arranged between the inner wall of the upper cover and the top; a first blocking part extending towards the direction close to the top is arranged on the inner wall of the upper cover and used for being impacted by the oil-gas mixture splashed in the oil leakage hole; a second blocking part for blocking leaked oil from entering the air passage is arranged on the top; the top is of an inverted cone structure, and the oil leakage hole is positioned in the middle of the top; the first blocking part comprises an arc-shaped plate, and the arc-shaped plate is covered above the oil leakage hole.
Preferably, an oil leakage pipe extending towards the direction close to the upper cover is arranged at the oil leakage hole, and a first oil return hole is arranged at the lower part of the oil leakage pipe.
Preferably, the number of the first oil return holes is multiple, and each first oil return hole is uniformly distributed in the circumferential direction of the oil leakage pipe.
Preferably, the upper cover is provided with a mounting hole opposite to the oil leakage hole, the middle position of one side of the arc plate, which is away from the air passage, is tangential to the side wall at the mounting hole, and the other sides of the arc plate are connected with the side wall at the mounting hole through a connecting plate; a gap is arranged between the arc-shaped plate and the top.
Preferably, the first blocking part further comprises a first baffle plate for the oil-gas mixture splashed after impacting the arc plate to collide, and the first baffle plate is arranged on one side of the inner wall of the upper cover, which is away from the air passage.
Preferably, the second blocking portion is a second baffle, the second baffle is of an arc-shaped structure, and the second baffle is arranged on one side, close to the air duct, of the top.
Preferably, a second oil return hole is formed in the lower portion of the second baffle plate.
Preferably, the valve body comprises a valve seat, a floater, an elastic piece and a shell, wherein the floater is arranged in the valve seat, and the elastic piece is arranged between the lower end of the floater and the valve seat; the lower part of the shell is arranged between the outer circumference of the floater and the valve seat, and the outer circumference of the upper part of the shell is provided with a mounting protrusion for connecting with the upper end of the valve seat; the upper cover is covered on the upper part of the shell.
Preferably, an annular groove is further formed in the outer circumferential surface of the upper portion of the housing, the annular groove is located above the mounting protrusion, and a sealing ring is arranged in the annular groove.
The invention has the beneficial effects that:
When the valve for the ventilation system of the automobile fuel tank is used, leaked oil-gas mixture can collide with the first blocking part when splashed out of the oil leakage hole, so that oil in the oil-gas mixture can drop on the top after colliding, and gas in the oil-gas mixture can flow out through the closed space and the ventilation duct; meanwhile, the second blocking part is utilized to prevent oil from entering the air passage, so that the valve can have an oil-gas separation function, an oil-gas separation mechanism is not required to be independently arranged in the air passage system, the space is better saved, the addition of parts is avoided, and the cost and the complexity of the arrangement of the air passage system are reduced.
Drawings
For a clearer description of embodiments of the present application or of the prior art, reference will be made briefly to the accompanying drawings, which are required to be used in the embodiments, and to further detail of specific embodiments of the present application, taken in conjunction with the accompanying drawings, wherein
FIG. 1 is a schematic diagram of a valve for an automotive fuel tank venting system according to an embodiment of the present invention;
FIG. 2 is a schematic view of an upper cover according to an embodiment of the present invention;
Fig. 3 is a schematic view of a housing according to an embodiment of the present invention.
The reference numerals in the drawings:
11. upper cover 12, air duct 13, arc plate 131, lower end face of arc plate
132. Right end face 14 of arc-shaped plate, first baffle 15, connecting plate 16 and mounting hole
21. Casing 22, second baffle 221, second oil return hole 23, and oil drain pipe
24. First oil return hole 25, annular groove 26, mounting boss 27, top plate
31. Seal ring 41, valve seat 51, float 61, elastic member 71, and seal assembly
81. Closed space
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present solution will be described in further detail with reference to specific embodiments.
As shown in fig. 1 to 3, the embodiment of the invention provides a valve for an automobile fuel tank ventilation system, which comprises an upper cover 11 and a valve body, wherein the upper cover 11 is arranged at the top of the valve body, and the top of the valve body is provided with an oil leakage hole; an air passage 12 is arranged on one side of the upper cover, and a closed space 81 communicated with the air passage is arranged between the inner wall of the upper cover 11 and the top; a first blocking part extending towards the direction close to the top is arranged on the inner wall of the upper cover 11 and is used for being impacted by the oil-gas mixture splashed in the oil leakage hole; the top is provided with a second blocking part for blocking leaked oil from entering the air passage.
When the valve for the ventilation system of the automobile fuel tank is used, leaked oil-gas mixture can collide with the first blocking part when splashed out of the oil leakage hole, so that oil in the oil-gas mixture drops on the top after colliding, and gas in the oil-gas mixture flows out through the closed space and the ventilation duct; meanwhile, the second blocking part is utilized to prevent oil from entering the air passage, so that the valve can have an oil-gas separation function, an oil-gas separation mechanism is not required to be independently arranged in the air passage system, the space is better saved, the addition of parts is avoided, and the cost and the complexity of the arrangement of the air passage system are reduced.
Further, the top is of an inverted cone structure, and the oil leakage hole is located in the middle of the top, so that oil leaked from the oil leakage hole is conveniently collected at the top.
Specifically, an oil leakage pipe 23 extending in a direction approaching the upper cover is provided at the oil leakage hole, and a first oil return hole 24 is provided at a lower portion of the oil leakage pipe 23, so that oil collected at the top can flow back into the valve body through the first oil return hole 24.
Preferably, the number of the first oil return holes 24 is plural, and each first oil return hole 24 is uniformly distributed in the circumferential direction of the oil leakage pipe, so that the oil collected at the top can conveniently flow back into the valve body.
Further, the first blocking part comprises an arc-shaped plate 13, a mounting hole 16 opposite to the oil leakage hole is formed in the upper cover, the middle position of one side, away from the air duct 12, of the arc-shaped plate 13 is tangent to the side wall of the mounting hole, and the other sides of the arc-shaped plate 13 are connected with the side wall of the mounting hole through connecting plates; the arc 13 covers the oil leakage hole, and a gap is formed between the arc 13 and the top. By adopting the scheme, the arc plate 13 is covered above the oil leakage hole, and the oil-gas mixture splashed out by the oil leakage hole can strike on the inner cambered surface of the arc plate 13, so that the effect of better oil-gas separation can be achieved. It can be understood that the intrados of the arc 13 is smooth; in the vertical direction, the lower end surface of the arc plate 13 is lower than the upper end surface of the oil leakage pipe 23, so that the splashed oil-gas mixture can collide with the arc plate 13; the opening of the arc plate 13 faces away from the air passage 12 so as to prevent oil liquid from splashing into the air passage 12 after striking the arc plate 13.
Specifically, the first blocking portion further includes a first baffle 14 for the oil-gas mixture that splashes out after striking the arc plate 23 to collide, the first baffle 14 is disposed on the inner wall of the upper cover 11 and is away from one side of the air duct 12, so that oil can be prevented from splashing onto the inner wall of the upper cover 11, and meanwhile, the oil can be impacted again by using the first baffle 14, so that the oil-gas separation effect of the valve is further improved. It will be appreciated that the first baffle 14 is opposite the opening of the arcuate plate 13; a gap is formed between the lower end surface of the first baffle plate and the top so as to facilitate oil to flow back to the oil leakage hole through the top; the first baffle can cover the whole opening of the arc-shaped plate, and a gap is formed between the right end face 132 of the arc-shaped plate and the first baffle so as to facilitate the gas to flow to the air passage; in the vertical direction, the lower end surface of the first baffle is lower than the lower end surface 131 of the arc-shaped plate; the first baffle 14 may be a curved baffle.
Further, the second blocking portion is a second baffle 22, the second baffle 22 is in an arc structure, and the second baffle 22 is disposed on one side of the top close to the air duct 12, so that oil can be better prevented from flowing into the air duct. It will be appreciated that the arcuate plate 13 is located between the second baffle and the leak pipe 23; the second baffle is arranged between the oil leakage pipe and the air passage and is used for blocking the low-speed oil-gas mixture from directly entering the air passage from the oil leakage pipe.
Specifically, the second oil return hole 221 is provided at the lower portion of the second baffle 22, so that a small amount of oil that occasionally remains outside the top second baffle 22 can flow to the middle position of the top through the second oil return hole 221.
Further, the valve body comprises a valve seat 41, a float 51, an elastic member 61 and a housing 21, wherein the float 51 is arranged in the valve seat 41, and the elastic member 61 is arranged between the lower end of the float 51 and the valve seat; the lower part of the housing 21 is disposed between the outer circumference of the float 51 and the valve seat 41, and the outer circumference of the upper part of the housing 21 is provided with a mounting protrusion 26 for connecting with the upper end of the valve seat 41; the upper cover 11 is provided to cover an upper portion of the housing 21. By adopting the scheme, the connection between the shell and the valve seat can be conveniently realized through the mounting protrusion 26, and meanwhile, the structure of the valve body is simpler; it will be appreciated that the top plate 27 of the housing is the top of the valve body; the float can move up and down in the shell, the structure and the working principle of the valve body are the same as those of the valve body in the prior art, and the details are not repeated here; the upper cover and the valve seat can be connected in a clamping way; the elastic member 61 may preferably be a spring.
Specifically, an annular groove 25 is further formed in the outer circumferential surface of the upper portion of the housing 21, the annular groove 25 is located above the mounting protrusion 26, and a sealing ring is arranged in the annular groove, so that the tightness between the upper cover and the housing is good, and air leakage is avoided. It is understood that the closed space 81 is a space surrounded by the inner wall surface of the upper cover and the outer wall surface of the top, and the closed space is connected to the carbon tank through a nylon tube after being communicated with the air passage.
The general working principle of the valve for the ventilation system of the automobile fuel tank provided by the embodiment of the invention is as follows: when the oil-gas mixture splashes out from the oil leakage hole, the oil-gas mixture collides with the inner surface of the arc plate 13, and the oil-gas mixture flows from the vertical direction to the horizontal direction due to the radian of the inner cambered surface of the arc plate 13 and collides with the first baffle plate 14 again; for the oil-gas mixture, two oil-gas separations are realized through the two collisions, and simultaneously the two collisions can also generate energy exchange, namely the gas flow rate in the two collisions is changed with small change, the flow direction is changed, and the oil flow rate in the two collisions is changed with large change and moves downwards under the influence of dead weight; thus, the gas eventually flows to the airway after changing direction; the oil can accumulate on the top, and under the action of dead weight, the oil accumulates along the upper surface of the top to the oil leakage hole in the middle of the top and finally flows back to the inside of the valve body through the first oil return hole and the oil leakage hole due to the inverted cone structure of the top.
The foregoing is merely a preferred embodiment of the present application, and it should be noted that these examples are only for illustrating the present application and are not intended to limit the scope of the present application, and that various changes and modifications may be made by one skilled in the art after reading the contents of the present application, and the equivalent forms are also within the scope of the present application as defined in the appended claims.
Claims (6)
1. The valve for the ventilation system of the automobile fuel tank is characterized by comprising an upper cover and a valve body, wherein the upper cover is arranged at the top of the valve body, and the top of the valve body is provided with an oil leakage hole; an air passage is arranged on one side of the upper cover, and a closed space communicated with the air passage is arranged between the inner wall of the upper cover and the top; a first blocking part extending towards the direction close to the top is arranged on the inner wall of the upper cover and used for being impacted by the oil-gas mixture splashed in the oil leakage hole; a second blocking part for blocking leaked oil from entering the air passage is arranged on the top; the top is of an inverted cone structure, and the oil leakage hole is positioned in the middle of the top; the first blocking part comprises an arc-shaped plate, and the arc-shaped plate is covered above the oil leakage hole;
the upper cover is provided with a mounting hole opposite to the oil leakage hole, the middle position of one side of the arc plate, which is away from the air duct, is tangential to the side wall at the mounting hole, and the other sides of the arc plate are connected with the side wall at the mounting hole through a connecting plate; a gap is formed between the arc-shaped plate and the top;
the first blocking part further comprises a first baffle plate used for enabling the oil-gas mixture splashed after impacting the arc-shaped plate to collide, and the first baffle plate is arranged on one side, away from the air passage, of the inner wall of the upper cover;
the second blocking part is a second baffle, the second baffle is of an arc-shaped structure, and the second baffle is arranged on one side, close to the air duct, of the top.
2. The valve for a ventilation system of an automobile fuel tank according to claim 1, wherein a drain pipe extending in a direction approaching the upper cover is provided at the drain hole, and a first oil return hole is provided at a lower portion of the drain pipe.
3. The valve for a ventilation system of an automobile fuel tank according to claim 2, wherein the number of the first oil return holes is plural, and each of the first oil return holes is uniformly distributed in a circumferential direction of the drain pipe.
4. The valve for a ventilation system of an automobile fuel tank according to claim 1, wherein a second oil return hole is provided at a lower portion of the second baffle plate.
5. A valve for a vehicle fuel tank venting system as defined in any one of claims 1 to 4, wherein said valve body comprises a valve seat, a float, an elastic member, a housing, said float being disposed within said valve seat, said elastic member being disposed between a lower end of said float and said valve seat; the lower part of the shell is arranged between the outer circumference of the floater and the valve seat, and the outer circumference of the upper part of the shell is provided with a mounting protrusion for connecting with the upper end of the valve seat; the upper cover is covered on the upper part of the shell.
6. The valve for a ventilation system of an automobile fuel tank according to claim 5, wherein an annular groove is further provided on an outer circumferential surface of an upper portion of the housing, the annular groove being located above the mounting boss, and a seal ring is provided in the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111194756.0A CN113944792B (en) | 2021-10-13 | Valve for ventilation system of automobile fuel tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111194756.0A CN113944792B (en) | 2021-10-13 | Valve for ventilation system of automobile fuel tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113944792A CN113944792A (en) | 2022-01-18 |
| CN113944792B true CN113944792B (en) | 2024-06-21 |
Family
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212960055U (en) * | 2020-08-12 | 2021-04-13 | 苏州市振业实业有限公司 | Oil tank built-in oiling limiting valve integrating oil-gas separation function |
| CN113124223A (en) * | 2021-05-11 | 2021-07-16 | 亚普汽车部件股份有限公司 | Combined valve for automobile fuel tank |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212960055U (en) * | 2020-08-12 | 2021-04-13 | 苏州市振业实业有限公司 | Oil tank built-in oiling limiting valve integrating oil-gas separation function |
| CN113124223A (en) * | 2021-05-11 | 2021-07-16 | 亚普汽车部件股份有限公司 | Combined valve for automobile fuel tank |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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