CN105275676A - Fuel and steam dual-way valve - Google Patents
Fuel and steam dual-way valve Download PDFInfo
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- CN105275676A CN105275676A CN201510741330.0A CN201510741330A CN105275676A CN 105275676 A CN105275676 A CN 105275676A CN 201510741330 A CN201510741330 A CN 201510741330A CN 105275676 A CN105275676 A CN 105275676A
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- valve
- fuel
- way valve
- valve body
- steam
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Abstract
The invention belongs to the technical field of valves, and discloses a fuel and steam dual-way valve. The fuel and steam dual-way valve comprises a two-way valve body, wherein the two-way valve body comprises an end A and an end B; the end A and the end B comprise large valve bodies, core covers, valve covers, springs, valve cores and valve bodies; the tops of the large valve bodies are connected with the core covers; the tops of the core covers are connected with the valve covers; the springs are arranged in the valve covers; the valve cores are arranged at the bottoms of the springs; and the valve bodies are arranged at the bottoms of the valve cores. The fuel and steam dual-way valve is used for an absorption pipe assembly; the assembly is used for conveying fuel and steam in a fuel tank to a carbon tank; the two-way valve stops the fuel from entering the carbon tank when the oil adding quantity of the fuel tank is excessive; the fuel and steam dual-way valve is powerful supplement of an EVAP system, improves the fuel economy, and prevents more fuel and steam from being exhausted into atmosphere to achieve an environmental protecting effect; and the large valve bodies, the core covers, the valve covers, the springs, the valve cores and the valve bodies are welded, so that the tightness is effectively guaranteed.
Description
Technical field
The present invention relates to a kind of two-way valve, be specifically related to a kind of fuel-steam two-way valve, belong to valve technology field.
Background technique
Current automobile is all equipped with fuel steam discharge control system (EVAP), fairly simple fuel evaporation control system common is at present (primarily of compositions such as fuel tank, charcoal canister, canister Controlling solenoid valve and various automobile pipeline assemblies (desorption pipe).Fuel evaporation control system (EVAP) can store the fuel vapor (HC) that oil-fired system produces; fuel vapor is stoped to be leaked in air; the fuel vapor of collection is in time sent into intake manifold simultaneously; enter engine combustion after mixing with normal mixed gas, fuel oil is fully used.Adsorption tube assembly is for transmitting fuel-steam in fuel tank to canister, and with two-way valve, when stoping fuel tank to refuel excessive, fuel oil enters canister.Two-way valve is also pressure retaining valve and absorption and control valve, a logical fuel tank, a logical canister.When motor does not work, ambient air temperature raises, and produce gasoline vapor in fuel tank and form malleation, gasoline vapor enters canister, by active carbon adsorption by this valve; When forming negative pressure in ambient air temperature decline gasoline vapor condensation fuel tank, air enters fuel tank, oil dropping apparatus tonifying Qi by canister and this valve.This valve is more crucial.If this valve is obstructed during fuel tank negative pressure, fuel tank will be there is during engine operation and inhale the flat or blow out of an engine.If during fuel tank malleation, this valve opening pressure is excessive, as being greater than 3,63KPA, then, when oil supply system does venting capability detection, will not reach the requirement of China's regulation.Namely, after inflating pressure 3,63KPA, open canister atmospheric air port, within 2MIN, Pressure Drop is less than 0, below 98KPA.It is lower that Volkswagen's two-way valve malleation opens pressure, only has 0.3Kpa.When malleation reaches 1Kpa, throughput is 7 to 16L/MLN, meets China's laws and regulations requirement.U.S., it is higher that Japanese automobile company two-way valve malleation opens pressure, and Japanese valve opens general 2.94 to the 3.92Kpa of pressure, even higher, below throughput 1L/MLN during 4.0Kpa.The U.S. more than two-way valve cracking pressure 7.0Kpa.America and Japan's two-way valve can not meet the laws and regulations requirement of China's automobile oil supply system venting capability.The important function of this valve another one makes engine air inlet tube and oil tank breather be cut-off state during engine operation.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, a kind of fuel-steam two-way valve is provided, for adsorption tube assembly, this assembly is for transmitting fuel-steam in fuel tank to canister, when this two-way valve stops fuel tank to refuel excessive, fuel oil enters canister, the present invention supplements the strong of EVAP system, improve the Economy of fuel oil avoid simultaneously more multiple fuel discharge of steam to air, play the effect of environmental protection, by by large valve body, core cap, valve gap, spring, by being welded to connect between spool and valve body, sealing is effectively guaranteed, effectively can solve the problem in background technique.
In order to solve the problems of the technologies described above, the invention provides following technological scheme:
The invention provides a kind of fuel-steam two-way valve, comprise two-way valve body, described two-way valve body comprises side a and b, described side a and b comprises large valve body, core cap, valve gap, spring, spool and valve body, described large body top is connected with core cap, and described core cap top is connected with valve gap, and described valve gap inside is provided with spring, described spring bottom is provided with spool, is provided with valve body bottom described spool.
As a preferred technical solution of the present invention, described two-way valve body is made up of plastic material.
As a preferred technical solution of the present invention, described large valve body, core cap, valve gap, spring, between spool and valve body by being welded to connect.
As a preferred technical solution of the present invention, described side a and b is two-way can allow air-flow to pass through and side a and b two ends pressure reduction different flow is different.
The beneficial effect that the present invention reaches is: a kind of fuel-steam two-way valve, for adsorption tube assembly, this assembly is for transmitting fuel-steam in fuel tank to canister, when this two-way valve stops fuel tank to refuel excessive, fuel oil enters canister, the present invention supplements the strong of EVAP system, improve the Economy of fuel oil avoid simultaneously more multiple fuel discharge of steam to air, play the effect of environmental protection, by by large valve body, core cap, valve gap, spring, between spool and valve body by being welded to connect, sealing is effectively guaranteed.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.
In the accompanying drawings:
Fig. 1 is a kind of fuel-steam two-way valve overall structure schematic diagram described in the embodiment of the present invention;
Fig. 2 is a kind of fuel-steam two-way valve side a and b schematic diagram described in the embodiment of the present invention;
Number in the figure: 1, large valve body; 2, core cap; 3, valve gap; 4, spring; 5, spool; 6, valve body; 7, B end; 8, A end; 9, two-way valve body.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Embodiment: refer to Fig. 1-2, a kind of fuel-steam two-way valve of the present invention, comprise two-way valve body 9, it is characterized in that, described two-way valve body 9 comprises A end 8 and B end 7, described A end 8 and B end 7 comprise large valve body 1, core cap 2, valve gap 3, spring 4, spool 5 and valve body 6, described large valve body 1 top is connected with core cap 2, and described core cap 2 top is connected with valve gap 3, and described valve gap 3 inside is provided with spring 4, be provided with spool 5 bottom described spring 4, bottom described spool 5, be provided with valve body 6.
Described two-way valve body 9 is made up of plastic material, described large valve body 1, core cap 2, valve gap 3, spring 4, between spool 5 and valve body 6 by being welded to connect, described A end 8 and B hold 7 two-way can allow air-flow by and A end 8 holds 7 two ends pressure reduction different flows different with B, by by large valve body 1, core cap 2, valve gap 3, spring 4, between spool 5 and valve body 6 by being welded to connect, sealing is effectively guaranteed.
It should be noted that, the present invention is a kind of fuel-steam two-way valve, during work, when the pressure difference that pressure and the B of A end hold is at below 5kpa, due to two-way valve inner spring by compression, valve body is its sphere and large valve body conical surface close contact under the elastic force effect of spring, and simultaneously under the effect of pressure reduction, spool withstands on core cap.Now air-flow can only be passed through by the endoporus of spool.When the pressure of A end and the pressure reduction of B are 8kpa, the gas pressure that valve body is subject to just in time equals the holding power that spring provides, now valve body and large valve body directly create gap, simultaneously valve body and valve gap directly have and preserve certain gap, now air-flow can pass through from mutual gap, and the aperture of spool also can allow gas pass through simultaneously.When the pressure of A end and the pressure reduction of B are 30kpa, the gas pressure that valve body is subject to is greater than the holding power that spring provides, and now valve body and large valve body directly create gap, and valve body contacts with valve gap under the effect of the pressure, and now air-flow can only pass through from the aperture of spool.When the pressure of A end and the pressure reduction of B are-0.98kpa, two-way valve inner spring by compression, valve body is its sphere and large valve body conical surface close contact under the elastic force effect of spring, but throw off with core cap under the pressure effect that spool is held at B, now air-flow can be passed through by the gap between core cap, spool and valve body.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a fuel-steam two-way valve, comprise two-way valve body, it is characterized in that, described two-way valve body comprises side a and b, and described side a and b comprises large valve body, core cap, valve gap, spring, spool and valve body, and described large body top is connected with core cap, described core cap top is connected with valve gap, described valve gap inside is provided with spring, and described spring bottom is provided with spool, is provided with valve body bottom described spool.
2. a kind of fuel-steam two-way valve according to claim 1, is characterized in that, described two-way valve body is made up of plastic material.
3. a kind of fuel-steam two-way valve according to claim 1, is characterized in that, described large valve body, core cap, valve gap, spring, between spool and valve body by being welded to connect.
4. a kind of fuel-steam two-way valve according to claim 1, is characterized in that, described side a and b is two-way can allow air-flow to pass through and side a and b two ends pressure reduction different flow is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741330.0A CN105275676B (en) | 2015-11-04 | 2015-11-04 | A kind of fuel-steam two-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741330.0A CN105275676B (en) | 2015-11-04 | 2015-11-04 | A kind of fuel-steam two-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105275676A true CN105275676A (en) | 2016-01-27 |
| CN105275676B CN105275676B (en) | 2018-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510741330.0A Active CN105275676B (en) | 2015-11-04 | 2015-11-04 | A kind of fuel-steam two-way valve |
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| Country | Link |
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| CN (1) | CN105275676B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146790A (en) * | 1995-05-05 | 1997-04-02 | 罗伯特·博施有限公司 | Valve for the metered introduction of vaporised fuel |
| EP1891360A1 (en) * | 2005-06-16 | 2008-02-27 | Raval A.C.S. LTD | Double check valve for a fuel system |
| CN201980076U (en) * | 2010-07-29 | 2011-09-21 | 天津市格林利福新技术有限公司 | Bidirectional valve for flow control |
| CN204553966U (en) * | 2015-04-14 | 2015-08-12 | 重庆溯联汽车零部件有限公司 | Twoway valves |
| CN205135859U (en) * | 2015-11-04 | 2016-04-06 | 河北亚大汽车塑料制品有限公司 | Fuel steam two -way valve |
-
2015
- 2015-11-04 CN CN201510741330.0A patent/CN105275676B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146790A (en) * | 1995-05-05 | 1997-04-02 | 罗伯特·博施有限公司 | Valve for the metered introduction of vaporised fuel |
| EP1891360A1 (en) * | 2005-06-16 | 2008-02-27 | Raval A.C.S. LTD | Double check valve for a fuel system |
| CN201980076U (en) * | 2010-07-29 | 2011-09-21 | 天津市格林利福新技术有限公司 | Bidirectional valve for flow control |
| CN204553966U (en) * | 2015-04-14 | 2015-08-12 | 重庆溯联汽车零部件有限公司 | Twoway valves |
| CN205135859U (en) * | 2015-11-04 | 2016-04-06 | 河北亚大汽车塑料制品有限公司 | Fuel steam two -way valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105275676B (en) | 2018-03-16 |
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