CN107606179B - Novel high-pressure resistant oil tank isolation valve for automobile - Google Patents
Novel high-pressure resistant oil tank isolation valve for automobile Download PDFInfo
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- CN107606179B CN107606179B CN201710979954.5A CN201710979954A CN107606179B CN 107606179 B CN107606179 B CN 107606179B CN 201710979954 A CN201710979954 A CN 201710979954A CN 107606179 B CN107606179 B CN 107606179B
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- spring
- isolation valve
- oil tank
- valve
- valve body
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- 238000002955 isolation Methods 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 42
- 238000003466 welding Methods 0.000 claims description 6
- 239000004033 plastic Substances 0.000 abstract description 3
- 230000001502 supplementing effect Effects 0.000 abstract description 3
- 229920001971 elastomer Polymers 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 21
- 229910052799 carbon Inorganic materials 0.000 description 17
- 239000004215 Carbon black (E152) Substances 0.000 description 10
- 229930195733 hydrocarbon Natural products 0.000 description 10
- 150000002430 hydrocarbons Chemical class 0.000 description 10
- 230000006872 improvement Effects 0.000 description 7
- 239000000446 fuel Substances 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000003502 gasoline Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention relates to a novel isolation valve of an automobile high-pressure resistant oil tank, which is characterized by comprising an isolation valve body, a spring assembly, a valve core assembly, a supporting rod, a flow limiting ring, a sealing ring and an electromagnetic valve, wherein the spring assembly, the valve core assembly, the flow limiting ring, the supporting rod and the sealing ring are all arranged in the isolation valve body, and the electromagnetic valve is arranged at the end part of the isolation valve body. The technical scheme has simple and ingenious structure, and uses fewer parts such as plastic parts, springs, electromagnetic valves, rubber parts and the like to realize complex functions such as high-pressure exhaust, negative-pressure air supplementing, oiling exhaust and the like; the diameter of the hole and the size of the spring can be adjusted to meet the requirements of different customers; the isolating valve with the structure only uses one electromagnetic valve, so that electric energy is saved; the isolating valve with the structure has small volume and does not occupy the space of the chassis.
Description
Technical Field
The invention relates to an isolation valve, in particular to a novel automobile high-pressure resistant oil tank isolation valve, and belongs to the technical field of plastic fuel tank structure equipment.
Background
Hydrocarbon molecules in the gasoline tank are volatilized and then continuously enter the carbon tank and are adsorbed by the activated carbon in the carbon tank, if a conventional automobile runs, the negative pressure formed by the engine desorbs the hydrocarbon molecules in the carbon tank into the engine for combustion, so that the hydrocarbon molecules are prevented from accumulating more and more in the carbon tank, and the risk of overflowing from an atmospheric port of the carbon tank to the outside and polluting the environment is generated. If the automobile is a plug-in type hybrid automobile, if the engine does not work for a long time, the carbon tank of the fuel system can not be desorbed by the engine, hydrocarbon molecules volatilized by gasoline can continuously enter the carbon tank, and after the activated carbon in the carbon tank is saturated by adsorption on the hydrocarbon molecules, the hydrocarbon molecules can overflow from the air port of the carbon tank to the outside, so that the environment is polluted; to avoid this risk, it is necessary to add a "tank isolation valve" between the tank and the canister, whose main functions are: when an automobile runs or stops by using a battery-driven motor, the 'oil tank isolation valve' is usually in a sealed closed state, hydrocarbon molecules in the oil tank are prevented from entering a carbon tank, but because the oil tank is sealed, the oil tank cannot exhaust, the oil tank rises in temperature or the fuel oil shakes severely, the pressure in the oil tank rises, when the pressure in the oil tank is too high (about 35 kPa), the high pressure exceeds the bearing range of the oil tank, the 'oil tank isolation valve' is set to open the exhaust under the pressure for safety, when the oil tank cools to about-15 kPa, the low pressure exceeds the bearing range of the oil tank, and the 'oil tank isolation valve' is set to open the exhaust under the pressure for safety; when the electric quantity of the automobile battery is exhausted and the engine is used for working, the oil tank isolation valve opens exhaust; when the automobile is refueled, the oil tank isolation valve is opened, so that the carbon tank is smoothly exhausted during refueled, and the refueled smoothness is met; another technical background is that when the tank isolation valve is opened when the tank pressure reaches about 35kPa, the hydrocarbon vapor with high flow in the tank needs to be discharged from the valve "FLVV", about 200 liters/min, and the FLVV is a mechanical valve, and the suction force generated by the excessively high flow can push the valve core float of the FLVV upwards to close the FLVV, so that the tank cannot continue to exhaust, and the problem is avoided by the tank isolation valve.
Disclosure of Invention
The invention provides a novel high-pressure resistant oil tank isolating valve for an automobile, which aims at the technical problems in the prior art, and the technical scheme has ingenious and compact overall structural design and meets the requirement of a fuel system of a plug-in type oil-electricity hybrid automobile.
In order to achieve the above purpose, the technical scheme of the invention is that the novel high-pressure resistant oil tank isolation valve for the automobile is characterized in that the oil tank isolation valve comprises an isolation valve body, a spring assembly, a valve core assembly, a supporting rod, a flow limiting ring, a sealing ring and an electromagnetic valve, wherein the spring assembly, the valve core assembly, the flow limiting ring, the supporting rod and the sealing ring are all arranged in the isolation valve body, and the electromagnetic valve is arranged at the end part of the isolation valve body.
As an improvement of the present invention, the spring assembly includes a first spring provided on the support rod, a second spring provided between the support rod and the first seal cartridge, and a third spring provided in the isolation valve body.
As an improvement of the invention, the valve core assembly comprises a first sealing valve core and a second sealing valve core, wherein the first sealing valve core and the supporting rod are fixed together through welding of contact surfaces, and the second sealing valve core is positioned through the supporting rod and a second spring.
As an improvement of the invention, the second sealing valve core is provided with a conical structure, and the conical structure facilitates centering and positioning when the second sealing valve core is restored to a sealing state after positive pressure is used for opening exhaust.
As an improvement of the invention, the supporting rod is provided with a vent hole which is used for isolating an exhaust channel when the valve is positively pressed to open exhaust.
As an improvement of the invention, the first sealing valve core is provided with a cylindrical boss, and the second spring is positioned through the cylindrical boss. Through the cylindrical boss on the first sealing valve core, the second spring and the second sealing valve core are centered and positioned when the second spring is assembled and positive pressure is used for opening exhaust.
As an improvement of the invention, the body is internally provided with a body step. The body step is used for placing and positioning the flow limiting ring.
As an improvement of the invention, the flow limiting ring is provided with an exhaust passage.
Compared with the prior art, the invention has the advantages that 1) the whole structure is compact and ingenious, the emission of hydrocarbon is effectively reduced, and the environment is protected; the fuel consumption in the using process of the automobile is reduced; the fuel quality is ensured, and the fuel is prevented from being weathered; 2) The technical scheme has simple and ingenious structure, and uses fewer parts such as plastic parts, springs, electromagnetic valves, rubber parts and the like to realize complex functions such as high-pressure exhaust, negative-pressure air supplementing, oiling exhaust and the like; the diameter of the hole and the size of the spring can be adjusted to meet the requirements of different customers; the isolating valve with the structure only uses one electromagnetic valve, so that electric energy is saved; the isolating valve with the structure has small volume and does not occupy the space of the chassis; 3) In the scheme, the second sealing valve core is arranged into a conical structure, and the conical structure is beneficial to centering and positioning when the second sealing valve core is restored to a sealing state after positive pressure is used for opening and exhausting; the support rod is provided with a vent hole which is used for isolating an exhaust channel when the valve is opened by positive pressure for exhaust; 4) In the scheme, a cylindrical boss is arranged on the first sealing valve core, and the second spring is positioned through the cylindrical boss. Through the cylindrical boss on the first sealing valve core, the second spring is ensured to be centered and positioned with the second sealing valve core when assembling and positive pressure opening exhaust; 5) According to the scheme, the safety of the oil tank is further improved, hydrocarbon emission in the use process of the plug-in type oil-electricity hybrid vehicle is reduced, the load of the carbon tank is lightened, and the smoothness of oiling is met.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic diagram of the valve core assembly and spring assembly;
FIGS. 4-8 are schematic diagrams of operational process states;
FIG. 9 is a schematic view of the exhaust passage of the restrictor ring partially shielded by the step of the body;
In the figure: 1. the valve core body comprises a valve core body, 2, a spring assembly, 3, a valve core assembly, 4, a support rod, 5, a flow limiting ring, 6, a sealing ring, 7, an electromagnetic valve, 21, a first spring, 22, a second spring, 23, a third spring, 31, a first sealing valve core, 32 and a second sealing valve core. 8. Welding surface 9, cylindrical boss 41, support rod vent hole 11, body step.
The specific embodiment is as follows:
in order to enhance the understanding and appreciation for the invention, the invention will be further described with reference to the drawings and the detailed description.
Example 1: referring to fig. 1, a novel high-pressure resistant oil tank isolation valve of an automobile, the oil tank isolation valve comprises an isolation valve body 1, a spring assembly 2, a valve core assembly 3, a support rod 4, a flow limiting ring 5, a sealing ring 6 and an electromagnetic valve 7, wherein the spring assembly, the valve core assembly, the flow limiting ring, the support rod and the sealing ring are all arranged in the isolation valve body, the electromagnetic valve is arranged at the end part of the isolation valve body, in the scheme, the spring assembly comprises a first spring 21, a second spring 22 and a third spring 23, the first spring is arranged on the support rod, the second spring is arranged between the support rod and a first sealing valve core 31, the third spring is arranged in the isolation valve body, the valve core assembly comprises a first sealing valve core 31 and a second sealing valve core 32, the first sealing valve core and the support rod are fixed together through welding of a contact surface, the second sealing valve core is positioned through the support rod and the second spring, the second sealing valve core is arranged into a conical structure, a vent hole is formed in the support rod, a cylindrical boss is arranged on the first sealing valve core, the second spring is positioned through the cylindrical boss, and a step is arranged in the interior of the support rod, and an exhaust channel is arranged on the sealing ring. Referring to fig. 3, the sealing spool 31 and the support rod 4 are fixed together by welding of the contact surface 8. The dotted circle of fig. 3 indicates the welding surface of the first sealing valve core and the supporting rod. The second spring 22 is always in a compressed state and is positioned by the cylindrical boss 9 of the first sealing spool 31. The second sealing spool 32 is positioned with the support rod 4 and the second spring 22 by its tapered surface structure, respectively. The second sealing spool 32 is opened only in the high-pressure state for exhaust and is closed in the rest of the conditions. The ventilation holes in the circumferential direction of the root of the support rod form a high-pressure exhaust passage, and the second spring 22 is designed according to the pressure during high-pressure exhaust, for example, 35 kPa. In the process that the first sealing valve core 1 moves back and forth along with the supporting rod, the functions of filling oil, exhausting and negative pressure air supplementing of the isolation valve can be realized.
Working principle: a novel isolating valve for a high-pressure resistant oil tank of an automobile has the following working process,
Referring to fig. 4, in a natural state, the solenoid valve is not energized, all springs are in a compressed state, and since the elasticity set by the first spring 21 is larger than that of the third spring 23, the valve is in a closed and sealed state, and the tank port and the carbon tank port are in an isolated state;
referring to fig. 5, in the high pressure open state, the solenoid valve is not energized, the "second spring 22" is opened by the high pressure inside the tank (about 35 kPA), the tank port and the canister port are in the open state, and the pressure inside the tank can be released to the outside through the canister;
Referring to fig. 6, in the negative pressure open state, the electromagnetic valve is not electrified, the third spring 23 is opened by the negative pressure in the tank (about-15 kPA), that is, the elasticity of the third spring 23 and the negative pressure in the tank are larger than those of the first spring 21, the port of the tank and the port of the carbon tank are in the open state, and the negative pressure in the tank can be released through the carbon tank;
Referring to fig. 7 and 9, in the oiling open state, the electromagnetic valve is electrified and subjected to electromagnetic force, a mechanism in the whole body is forced to move outwards, the electromagnetic valve is opened, the flow limiting ring is forced to be closed, the first spring 21 is compressed, at the moment, the flow limiting ring is still attached to the step 11 of the body under higher pressure of the oil tank, the exhaust channel part on the flow limiting ring is blocked by the step of the body, the exhaust quantity is not very large, the risk that the FLVV is closed and exhaust is blocked is avoided, the port of the oil tank and the port of the carbon tank are in the open state, and the pressure in the oil tank can be released to the outside through the carbon tank;
Referring to fig. 8, when the pressure in the fuel tank drops to a certain value, the elastic force of the third spring 23 is greater than the fuel tank pressure, the flow limiting ring is pushed out of the step, the whole exhaust passage of the flow limiting ring can exhaust, the pressure release of the fuel tank is accelerated, meanwhile, the FLVV is not closed due to the fuel tank pressure, and at the moment, the electromagnetic valve is opened, and the flow limiting ring is opened.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and equivalent changes or substitutions made on the basis of the above-mentioned technical solutions fall within the scope of the present invention as defined in the claims.
Claims (3)
1. The utility model provides an automobile high pressure resistant oil tank isolation valve, characterized in that, oil tank isolation valve includes isolation valve body, spring assembly, case subassembly, bracing piece, restriction ring, sealing washer and solenoid valve, spring assembly, case subassembly, restriction ring, bracing piece, sealing washer all set up in isolation valve body, the solenoid valve sets up the tip at isolation valve body, the case subassembly includes first seal case and second seal case, spring assembly includes first spring, second spring and third spring, first spring sets up on the bracing piece, the second spring sets up between second seal case and first seal case, the third spring sets up in isolation valve body to be located first case periphery, fixed together through the contact surface welding between first seal case and the bracing piece, the second seal case is fixed through bracing piece and second spring, the second seal case sets up to conical structure, the body is inside to be provided with the body step, be provided with the exhaust passage on the restriction ring, the restriction ring is located the periphery of first seal case step, sets up in body step, when setting up in the body step, and open the state, and the restriction ring is exposed to the electromagnetic force is closed to the outside the isolation valve body, the restriction ring is still acted on the side of the electromagnetic force of the isolation valve body, the restriction ring is opened to the electromagnetic force is kept off the pressure,
When the pressure in the oil tank is reduced to a certain value, the elastic force of the third spring is larger than the pressure of the oil tank, and the flow limiting ring is pushed out of the step.
2. The automotive high pressure resistant tank isolation valve of claim 1, wherein the support rod is provided with a vent hole.
3. The automotive high pressure resistant tank isolation valve of claim 2, wherein the first sealing spool is provided with a cylindrical boss, and the second spring is positioned by the cylindrical boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710979954.5A CN107606179B (en) | 2017-10-19 | 2017-10-19 | Novel high-pressure resistant oil tank isolation valve for automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710979954.5A CN107606179B (en) | 2017-10-19 | 2017-10-19 | Novel high-pressure resistant oil tank isolation valve for automobile |
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| Publication Number | Publication Date |
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| CN107606179A CN107606179A (en) | 2018-01-19 |
| CN107606179B true CN107606179B (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710979954.5A Active CN107606179B (en) | 2017-10-19 | 2017-10-19 | Novel high-pressure resistant oil tank isolation valve for automobile |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209685A (en) * | 2018-08-24 | 2019-01-15 | 亚普汽车部件股份有限公司 | A kind of new electronic control high-pressure fuel oil system |
| CN109611590B (en) * | 2019-01-24 | 2023-11-28 | 安徽尼威汽车动力系统有限公司 | Oil tank isolation valve |
| CN112594096A (en) * | 2020-12-09 | 2021-04-02 | 亚普汽车部件股份有限公司 | Electric control valve, electric control fuel system and control method |
| CN112576417A (en) * | 2020-12-09 | 2021-03-30 | 亚普汽车部件股份有限公司 | Electric control valve, electric control valve assembly, electric control fuel system and filling control method |
| CN113931769B (en) * | 2021-10-13 | 2023-03-24 | 亚普汽车部件股份有限公司 | Integrated electric control assembly of fuel system and fuel system control method |
| CN114087371B (en) * | 2021-10-18 | 2022-09-27 | 苏州恩都法汽车系统有限公司 | Oil tank isolating valve |
| CN114673609A (en) * | 2021-10-18 | 2022-06-28 | 苏州恩都法汽车系统有限公司 | Oil tank isolation valve control system |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6028748B2 (en) * | 2014-02-13 | 2016-11-16 | 株式会社デンソー | solenoid valve |
| JP6253623B2 (en) * | 2015-09-14 | 2017-12-27 | 本田技研工業株式会社 | Fuel shut-off valve |
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|---|---|---|---|---|
| KR19980056761A (en) * | 1996-12-30 | 1998-09-25 | 박병재 | Over Wheel Limiter for Evaporative Gas Control |
| JP2002317707A (en) * | 2001-04-24 | 2002-10-31 | Toyota Motor Corp | Fuel vapor control device |
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| CN107606179A (en) | 2018-01-19 |
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