CN201800530U - Fuel tank cover - Google Patents
Fuel tank cover Download PDFInfo
- Publication number
- CN201800530U CN201800530U CN 201020502801 CN201020502801U CN201800530U CN 201800530 U CN201800530 U CN 201800530U CN 201020502801 CN201020502801 CN 201020502801 CN 201020502801 U CN201020502801 U CN 201020502801U CN 201800530 U CN201800530 U CN 201800530U
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- CN
- China
- Prior art keywords
- fuel tank
- negative pressure
- pressure valve
- hole
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a fuel tank cover. A through hole is formed in the fuel tank cover, two ends of the through hole are communicated with the atmosphere and the interior of a fuel tank respectively, and a negative pressure valve for sealing the through hole in a natural state is arranged in the fuel tank cover; and when the interior of the fuel tank reaches the set negative pressure, the negative pressure valve is opened so that the atmosphere is communicated with the interior of the fuel tank. The negative pressure in the fuel tank can be kept in a certain range by using repeated opening and closing of the negative pressure valve in the design, so that the pressure inside and outside the fuel tank is balanced, the condition that a fuel system cannot normally supply oil to an engine due to over-high pressure inside the fuel tank is avoided, and the potential safety hazards of contraction deformation, leakage and the like due to negative pressure of the fuel tank are eliminated.
Description
Technical field
The utility model relates to a kind of fuel tank cap, particularly a kind of fuel tank cap with negative pressure valve.
Background technology
For tackling the control requirement of country, only have in the market by installing the charcoal jar additional to absorb fuel vapor in the Fuel Tank, thereby reach the control setup that reduces the fuel oil evaporation quantity discharged the fuel oil evaporation quantity discharged of motor bike.With reference to Fig. 1, Fig. 2, existing motorcycle fuel evaporation quantity discharged control setup, its 2 pairs of Fuel Tanks 1 of fuel tank cap by closed type seal, charcoal jar 3 is communicated with the inside of Fuel Tank 1, when malleation occurring in the Fuel Tank 1, the fuel vapor evaporation is promptly arranged, then absorb fuel vapor, reduce fuel vapor and discharge to the external world by canister 3; When negative pressure occurring in the Fuel Tank 1, due to promptly fuel oil consumption, pasta descended, then outside fresh air entered in the Fuel Tank by charcoal jar 3.
But because charcoal jar 3 has certain ventilation impedance, when ventilation impedance after 3 long-term uses of charcoal jar becomes big or ventilating return when stopping up, can't replenish air in the bio-occlusion Fuel Tank, head it off or be to change the charcoal jar, it is exactly cleaning mediation charcoal jar, so cause use, the maintenance cost of product to increase, and frequent cleaning charcoal jar continually, also bring inconvenience to the user.So develop a kind of pressure that is used for balance fuel case inside and outside, avoid causing the situation that fuel oil system can not the bio-occlusion engine oil to occur, eliminate Fuel Tank has been put on people because of the fuel tank cap of potential safety hazards such as negative pressure shrinkage distortion, leakage research schedule because of the Fuel Tank internal negative pressure is excessive.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of pressure that is used for balance fuel case inside and outside, avoid causing the situation that fuel oil system can not the bio-occlusion engine oil to occur, eliminate the fuel tank cap of Fuel Tank because of potential safety hazards such as negative pressure shrinkage distortion, leakages because of the Fuel Tank internal negative pressure is excessive.
The technical scheme that its technical matters that solves the utility model adopts is:
A kind of fuel tank cap, have through hole in the described fuel tank cap, the two ends of through hole communicate with atmosphere and Fuel Tank inside respectively, are provided with the negative pressure valve of state of nature lower seal through hole in the fuel tank cap, when reaching the setting negative pressure in the Fuel Tank, negative pressure valve is opened and is made atmosphere communicate with Fuel Tank inside;
As improvement of the technical scheme, the pedestal of liner seat in comprising, described fuel tank cap is housed, and this pedestal has the opening that communicates with Fuel Tank inside, and described pedestal top is with cover, has clamped the negative pressure valve valve seat between described cover and liner seat; Described negative pressure valve valve seat is provided with up big and down small stepped hole, upper and lower end at this stepped hole is provided with groove and the described through hole that radially runs through the valve seat wall respectively, have the perforation that two ends lead to groove and atmosphere respectively on described pedestal top, described liner seat has the hole that communicates with Fuel Tank inside and through hole lower end, and the negative pressure valve of state of nature lower seal through hole is housed on the described negative pressure valve valve seat.
The beneficial effects of the utility model are: when the negative pressure in the Fuel Tank during less than setting value (setting value is different according to vehicle), negative pressure valve is in closed condition, and promptly the umbrella portion edge of negative pressure valve is attached to and forms sealing on the negative pressure valve valve seat; When the negative pressure in the Fuel Tank reaches the setting negative pressure, negative pressure valve will be opened; After outside air enters Fuel Tank, when the negative pressure in the Fuel Tank during once more less than setting value, negative pressure valve will cut out again.The design's profit adopts the repeated open of negative pressure valve and closes the negative pressure that can make in the Fuel Tank and remains on certain limit, thereby reach the pressure of balance fuel case inside and outside, avoid causing the situation that fuel oil system can not the bio-occlusion engine oil to occur, eliminate Fuel Tank because of potential safety hazards such as negative pressure shrinkage distortion, leakages because of the Fuel Tank internal negative pressure is excessive.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is known motorcycle fuel evaporation quantity discharged control setup structural representation;
Fig. 2 is the A place enlarged drawing of Fig. 1;
Fig. 3 is a sealing state scheme drawing of the present utility model;
Fig. 4 is an air inlet view of the present utility model;
Fig. 5 is the B place enlarged drawing of Fig. 4.
The specific embodiment
With reference to Fig. 3, Fig. 4, a kind of fuel tank cap, have through hole 6 in the described fuel tank cap 2, the two ends of through hole 6 communicate with atmosphere and Fuel Tank 1 inside respectively, be provided with the negative pressure valve 4 of state of nature lower seal through hole 6 in the fuel tank cap 2, when reaching the setting negative pressure in the Fuel Tank 1, negative pressure valve 4 is opened and is made atmosphere communicate with Fuel Tank 1 inside.
The pedestal 21 of liner seat 24 is housed in the fuel tank cap 2 that the design uses comprises, this pedestal 21 has the opening 211 that communicates with Fuel Tank 1 inside, and described pedestal 21 tops are with cover 22, have clamped negative pressure valve valve seat 23 between described cover 22 and liner seat 24; Described negative pressure valve valve seat 23 is provided with groove 231 and the described through hole 6 that radially runs through the valve seat wall, have the perforation 212 that two ends lead to groove 231 and atmosphere respectively on described pedestal 21 tops, described negative pressure valve valve seat 23 is provided with up big and down small stepped hole, upper end at this stepped hole is provided with the groove 231 that radially runs through the valve seat wall, the lower end is provided with axial through hole 6, make through hole 6 and groove 231 be communicated with, the negative pressure valve 4 of state of nature lower seal through hole 6 is housed on the described negative pressure valve valve seat 23 by stepped hole.In addition, between the oil filling port 11 of described negative pressure valve valve seat 23, liner seat 24, pedestal 21 and Fuel Tank 1, be respectively arranged with gasket seal 5, the use of gasket seal 5 guarantees that effectively the fuel vapor in the Fuel Tank 1 can not evaporate in the ambient atmosphere by fuel tank cap 2, thereby reduces the quantity discharged of fuel oil evaporation; But also have when vehicle falls down to the ground, prevent the function that fuel oil overflows from fuel tank cap 2.Simultaneously, the design is provided with the flange 232 of the umbrella portion 42 that surrounds negative pressure valve 4 at negative pressure valve valve seat 23 lower surfaces, and this design effectively oil that do not rocked of protection negative pressure valve 4 is washed away, and also can lead to air inlet, strengthens the intensity of negative pressure valve valve seat 23.Certainly, fuel tank cap 2 also is not limited to the said structure form, can also adopt other structures commonly used to substitute.
The negative pressure valve 4 that the utility model uses is the umbrella shape of falling of rubber or elastomeric material making, the umbrella handle 41 of negative pressure valve 4 upwards is inserted on the negative pressure valve valve seat 23, the umbrella portion 42 state of nature lower seal through holes 6 of negative pressure valve 4, the umbrella portion 42 of described negative pressure valve 4 is an arch, the design of arch is that the elastic force of utilizing umbrella portion 42 to be had seals through hole 6, and prevent from sticking under the effect of oil film on the negative pressure valve valve seat 23, guarantee the edge and 23 contact seals of negative pressure valve valve seat of umbrella portion 42, contact surface is little, and can open by enough more weak pressure; In addition, come off in order to prevent negative pressure valve 4, the umbrella handle 41 of described negative pressure valve 4 is provided with the protruding circle 411 of anticreep.Certainly negative pressure valve 4 is not limited to above-mentioned form, also can adopt other structures commonly used, so long as essentially identical with it means realize the purpose of this utility model, all belongs to protection domain of the present utility model in a word.
With reference to Fig. 5, when reaching setting negative pressure (for example 100Pa) in the Fuel Tank 1, negative pressure valve 4 is subjected to the effect of negative pressure that deformation takes place downwards, its umbrella portion 42 edges separate with fitting surface on the negative pressure valve valve seat 23, perforation 212 the through hole 6 through negative pressure valve valve seat 23 on of outside air from the pedestal 21, by the umbrella portion 42 of negative pressure valve 4 and gap after fitting surface on the negative pressure valve valve seat 23 separates, the hole 241 from liner seat 24 is supplemented to Fuel Tank 1 inside again, effectively to reach the pressure of balance fuel case 1 inside and outside.
When the negative pressure in the Fuel Tank 1 during less than setting value, negative pressure valve 4 is in closed condition, and promptly umbrella portion 42 edges of negative pressure valve 4 are attached to and form sealing on the negative pressure valve valve seat 23; When the negative pressure in the Fuel Tank 1 reaches negative pressure valve 4 and opens required pressure, negative pressure valve 4 will be opened; After outside air enters Fuel Tank 1, when the negative pressure in the Fuel Tank 1 during once more less than setting value, negative pressure valve 4 will cut out again, the design utilizes the repeated open of negative pressure valve 4 and closes the negative pressure that can make in the Fuel Tank 1 and remains on certain limit, thereby reach the pressure of balance fuel case 1 inside and outside, avoid causing the situation that fuel oil system can not the bio-occlusion engine oil to occur, eliminate Fuel Tank 1 because of potential safety hazards such as negative pressure shrinkage distortion, leakages because of Fuel Tank 1 internal negative pressure is excessive.
Claims (7)
1. fuel tank cap, it is characterized in that: have through hole (6) in the described fuel tank cap (2), the two ends of through hole (6) communicate with atmosphere and Fuel Tank (1) inside respectively, be provided with the negative pressure valve (4) of state of nature lower seal through hole (6) in the fuel tank cap (2), when reaching the setting negative pressure in the Fuel Tank (1), negative pressure valve (4) is opened and is made atmosphere communicate with Fuel Tank (1) inside.
2. a kind of fuel tank cap according to claim 1, it is characterized in that: the pedestal (21) that liner seat (24) are housed in described fuel tank cap (2) comprises, this pedestal (21) has the opening (211) that communicates with Fuel Tank (1) inside, described pedestal (21) top is with cover (22), has clamped negative pressure valve valve seat (23) between described cover (22) and liner seat (24); Described negative pressure valve valve seat (23) is provided with up big and down small stepped hole, upper and lower end at this stepped hole is provided with groove (231) and the described through hole (6) that radially runs through the valve seat wall respectively, have the perforation (212) that two ends lead to groove (231) and atmosphere respectively on described pedestal (21) top, described liner seat (24) has the hole (241) that communicates with Fuel Tank (1) inside and through hole (6) lower end, and the negative pressure valve (4) of state of nature lower seal through hole (6) is housed on the described negative pressure valve valve seat (23).
3. a kind of fuel tank cap according to claim 2, it is characterized in that: described negative pressure valve (4) is for falling umbrella shape, the umbrella handle (41) of negative pressure valve (4) upwards is inserted on the negative pressure valve valve seat (23), umbrella portion (42) the state of nature lower seal through hole (6) of negative pressure valve (4).
4. a kind of fuel tank cap according to claim 3 is characterized in that: the umbrella portion (42) of described negative pressure valve (4) is an arch.
5. a kind of fuel tank cap according to claim 3 is characterized in that: described negative pressure valve valve seat (23) lower surface is provided with the flange (232) of the umbrella portion (42) that surrounds negative pressure valve (4).
6. a kind of fuel tank cap according to claim 3 is characterized in that: the umbrella handle (41) of described negative pressure valve (4) is provided with the protruding circle of anticreep (411).
7. according to described any fuel tank cap of claim 2 to 6, it is characterized in that: between the oil filling port (11) of described negative pressure valve valve seat (23), liner seat (24), pedestal (21) and Fuel Tank (1), be respectively arranged with gasket seal (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020502801 CN201800530U (en) | 2010-08-24 | 2010-08-24 | Fuel tank cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020502801 CN201800530U (en) | 2010-08-24 | 2010-08-24 | Fuel tank cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201800530U true CN201800530U (en) | 2011-04-20 |
Family
ID=43870047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020502801 Expired - Lifetime CN201800530U (en) | 2010-08-24 | 2010-08-24 | Fuel tank cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201800530U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103213635A (en) * | 2013-04-15 | 2013-07-24 | 江门市大长江集团有限公司 | Fuel tank cap and oil filler sealing structure assembly for motorcycle |
| CN103287528A (en) * | 2013-05-28 | 2013-09-11 | 江门市大长江集团有限公司 | Fuel tank |
| CN104875602A (en) * | 2014-02-27 | 2015-09-02 | 安徽省宁国天亿滚塑有限公司 | Fuel tank ventilation assembly |
| CN109154262A (en) * | 2016-05-17 | 2019-01-04 | 罗伯特·博世有限公司 | For the overflow valve of high-pressure pump, high-pressure pump and method for running overflow valve |
| CN109538945A (en) * | 2018-12-17 | 2019-03-29 | 东风富士汤姆森调温器有限公司 | Universal vehicle-mounted fuel systems leak detecting device |
-
2010
- 2010-08-24 CN CN 201020502801 patent/CN201800530U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103213635A (en) * | 2013-04-15 | 2013-07-24 | 江门市大长江集团有限公司 | Fuel tank cap and oil filler sealing structure assembly for motorcycle |
| CN103287528A (en) * | 2013-05-28 | 2013-09-11 | 江门市大长江集团有限公司 | Fuel tank |
| CN104875602A (en) * | 2014-02-27 | 2015-09-02 | 安徽省宁国天亿滚塑有限公司 | Fuel tank ventilation assembly |
| CN109154262A (en) * | 2016-05-17 | 2019-01-04 | 罗伯特·博世有限公司 | For the overflow valve of high-pressure pump, high-pressure pump and method for running overflow valve |
| CN109154262B (en) * | 2016-05-17 | 2021-07-27 | 罗伯特·博世有限公司 | Overflow valve for a high-pressure pump, high-pressure pump and method for operating an overflow valve |
| CN109538945A (en) * | 2018-12-17 | 2019-03-29 | 东风富士汤姆森调温器有限公司 | Universal vehicle-mounted fuel systems leak detecting device |
| CN109538945B (en) * | 2018-12-17 | 2023-10-27 | 东风富士汤姆森调温器有限公司 | Universal type vehicle-mounted fuel system leakage detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110420 |