CN203809182U - Needle valve assembly for fuel injection device - Google Patents
Needle valve assembly for fuel injection device Download PDFInfo
- Publication number
- CN203809182U CN203809182U CN201420196172.6U CN201420196172U CN203809182U CN 203809182 U CN203809182 U CN 203809182U CN 201420196172 U CN201420196172 U CN 201420196172U CN 203809182 U CN203809182 U CN 203809182U
- Authority
- CN
- China
- Prior art keywords
- valve
- needle
- oil
- ring groove
- nozzle opening
- 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
Links
- 238000002347 injection Methods 0.000 title claims abstract description 33
- 239000007924 injection Substances 0.000 title claims abstract description 33
- 239000000446 fuel Substances 0.000 title claims abstract description 30
- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 97
- 238000002485 combustion reaction Methods 0.000 description 14
- 239000000295 fuel oil Substances 0.000 description 13
- 230000008859 change Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010761 intermediate fuel oil Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model provides a needle valve assembly for a fuel injection device. The needle valve assembly comprises a valve body (10) and a needle valve (20). The valve body is provided with a valve body end (12), a valve hole (14), an oil inlet channel (16) and oil injection holes (18). The oil injection holes comprise a first set of oil injection holes (181) and a second set of oil injection holes (182). The first injection angle of the first set of the oil injection holes is smaller than the second injection angle of the second set of the oil injection holes. The communication position of the first set of oil injection holes and the valve hole is closer to the valve body end than the communication position of the second set of oil injection holes and the valve hole. The needle valve can move in the valve hole in a reciprocating mode. The needle valve comprises an oil inlet ring groove (26), an oil outlet ring groove (28) and an oil supply channel (24) communicated with the oil inlet ring groove and the first oil outlet ring groove. The first oil outlet ring groove can be respectively communicated with the first set of oil injection holes or the second set of oil injection holes, fuel is injected at the different injection angles, and the needle valve assembly is suitable for air-fuel mixture of different loads, takes fuel consumption and emission under different circumstances into consideration, and is simple in structure and convenient to machine.
Description
Technical field
The utility model relates to the needle valve assembly of fuel injection apparatus, especially for the needle valve assembly of the fuel injection apparatus of internal-combustion engine.
Background technique
Diesel engine traditional combustion is high-temp combustion HTC(High Temperature Combustion) pattern, very easily forming NOx and PM generates, and NOx and PM present significantly contrary variation relation, how to reduce that NOx discharges with PM is the emphasis that improves diesel emission simultaneously.
Premixed charge compression ignition burning PCCI(Premixed Charge Compression Ignition) allow the denseer mixed gas region of existence in cylinder, as long as the empty equivalent proportion of the combustion in rich mixture district is less than 2, just can avoid tail gas carbon granule (soot) discharge formation zone, certain this combustion manner also will guarantee that maximum combustion temperature is no more than 2200K, to avoid NOx formation zone.When the about 1600K of combustion temperature, no matter how dense mixed gas have, and substantially can avoid the generation of NOx and Soot.
By early-injection, can realize PCCI combustion mode, but along with the increase of engine load, in cylinder, premixed gas, in the burning in advance of compression stroke, causes NOx discharge to be risen, meanwhile, combustion phase causes combustion efficiency to reduce in advance.Therefore, motor adopts traditional combustion pattern under high load working condition, to obtain than better fuel economy and emission performance under PCCI combustion mode.
Figure 1 shows that a kind of structural representation of needle valve assembly of common fuel injection apparatus, as shown in the figure, needle valve assembly comprises valve body 60 and needle-valve 70.Valve body 60 is provided with the valve opening 62 of axially offering along it, oil inlet passage 64 communicates with valve opening 62, the end 68 of valve body 60 offers a plurality of nozzle openings 66 that communicate with valve opening 62, and fuel oil can flow into valve opening 62 from oil inlet passage 64, and from the space between valve opening 62 and needle-valve 70, flows to the end of needle-valve 70.Needle-valve 70, in the interior to-and-fro motion of valve opening 62, by the end of needle-valve 70 and coordinating of nozzle opening 66, opens or closes nozzle opening, thereby controls fuel oil to the injection in cylinder.Conventionally " angle of attack " of definition fuel oil is the angle of nozzle opening 66 axis and needle-valve 70 axis.But this fuel injection apparatus can not meet the air-fuel mixture situation under different combustion modes, cause taking into account the control to fuel consume and pollutant emission under different situations, and need between needle-valve and valve opening axially and end has very high quality of fit.
Model utility content
The purpose of this utility model is to provide a kind of needle valve assembly of fuel injection apparatus, to adapt to the air-fuel mixture situation of different load condition, take into account the control to fuel consume and pollutant emission under different situations, and this needle valve assembly is simple in structure, easy to process.
The needle valve assembly of fuel injection apparatus, comprises a valve body and a needle-valve.Valve body has the valve body end of a sealing, a valve opening, an oil inlet passage communicating with valve opening, and a plurality of nozzle opening communicating with valve opening.Nozzle opening comprises first group of nozzle opening and second group of nozzle opening, the first angle of attack of first group of nozzle opening is less than the second angle of attack of second group of nozzle opening, and the position that is communicated with of first group of nozzle opening and valve opening is communicated with position near valve body end than second group of nozzle opening and valve opening.Needle-valve can to-and-fro motion in valve opening, and it comprises that an oil-feed annular groove, one go out oil ring groove and one and be communicated with the oil supply gallery that oil-feed annular groove and first goes out oil ring groove.Oil-feed annular groove is opened in the outer circumferential face of needle-valve, is connected with the oil inlet passage of valve body.First goes out the outer circumferential face that oil ring groove is opened in needle-valve, and during the position of needle-valve in its stroke, first goes out oil ring groove communicates with first group of nozzle opening; During the another location of needle-valve in its stroke, first goes out oil ring groove communicates with second group of nozzle opening.
In a kind of exemplary embodiment of needle valve assembly, wherein oil supply gallery comprises a radial passage, first oil discharge passage and an axial passage.Radial passage is radially offered with radial communication oil-feed annular groove along needle-valve; The first oil discharge passage is radially offered with radial communication first and is gone out oil ring groove along needle-valve; Axial passage along needle-valve axially offer be axially communicated with radial passage and the first oil discharge passage.
In the another kind of exemplary embodiment of needle valve assembly, wherein needle-valve also comprises that one second goes out oil ring groove and one the 3rd and goes out oil ring groove, and first goes out oil ring groove, second goes out oil ring groove and the 3rd and go out the oil ring groove end near valve body end away from needle-valve successively.Oil supply gallery also comprises second oil discharge passage and the 3rd oil discharge passage, the second oil discharge passage is radially offered with radial communication second and is gone out oil ring groove along needle-valve, the 3rd oil discharge passage is radially offered with radial communication the 3rd and is gone out oil ring groove along needle-valve, and axial passage is communicated with radial passage, the first oil discharge passage, the second oil discharge passage and the 3rd oil discharge passage.During the another position of needle-valve in its stroke, second goes out oil ring groove communicates with second group of nozzle opening, and the 3rd goes out oil ring groove and communicate with first group of nozzle opening simultaneously.
In another exemplary embodiment of needle valve assembly, wherein nozzle opening also comprises the 3rd group of nozzle opening, the 3rd angle of attack of the 3rd group of nozzle opening is greater than the second angle of attack of second group of nozzle opening, and the position that is communicated with of the 3rd group of nozzle opening and valve opening is communicated with position away from valve body end than second group of nozzle opening and valve opening.During the another position of needle-valve in its stroke, first goes out oil ring groove communicates with the 3rd group of nozzle opening.
Needle valve assembly of the present utility model has changed common needle valve assembly intermediate fuel oil and via the space between needle-valve and valve opening, has flowed to the fuel supply path of nozzle opening completely, but part fuel supply path is opened in needle-valve, control the position that is communicated with of fuel supply path on needle-valve and nozzle opening on valve body, can realize the change of angle of attack, and the needle valve assembly at this variable injecting angle is simple in structure, easy to process.
Adopt needle valve assembly of the present utility model to change flexibly angle of attack according to the variation of engine operating condition, avoid fuel oil collision casing wall, improve air utilization ratio in cylinder, improve the air-fuel mixture situation of motor under various operating modes, improve burning and the emission performance of motor.
Accompanying drawing explanation
The following drawings only schematically illustrates and explains the utility model, does not limit scope of the present utility model.
Fig. 1 is for illustrating a kind of common needle valve assembly.
Fig. 2 is for illustrating the structural representation of a kind of exemplary embodiment of the utility model needle valve assembly.
Fig. 3 is the structural representation of needle valve assembly in another eject position described in Fig. 2.
Fig. 4 is for illustrating the structural representation of the another kind of exemplary embodiment of the utility model needle valve assembly.
Fig. 5 is for illustrating the structural representation of another exemplary embodiment of the utility model needle valve assembly.
Identifier declaration:
10 valve bodies
12 valve body ends
14 valve openings
16 oil inlet passages
18 nozzle openings
181 first groups of nozzle openings
182 second groups of nozzle openings
183 the 3rd groups of nozzle openings
20 needle-valves
24 oil supply galleries
242 axial passages
246 radial passages
247 second oil discharge passages
248 first oil discharge passages
249 the 3rd oil discharge passages
26 oil-feed annular grooves
28 first go out oil ring groove
282 second go out oil ring groove
283 the 3rd go out oil ring groove
60 valve bodies
62 valve openings
64 oil inlet passages
66 nozzle openings
68 ends
70 needle-valves
α the first angle of attack
β the second angle of attack
γ the 3rd angle of attack.
Embodiment
For the technical characteristics of model utility, object and effect being had more clearly, understand, now contrast accompanying drawing explanation embodiment, accompanying drawing is only understood for helping, the not practical structures of representative products and truly ratio, and in each figure, identical label represents identical part.
In this article, " schematically " expression " is served as example, example or explanation ", any diagram, the mode of execution that are described in this article " schematically " should be interpreted as a kind of preferred or have more the technological scheme of advantage.In this article, " first ", " second ", " the 3rd " be only for differentiation each other, but not represent their significance level etc.In this article " connection " both can represent direct connection between the two, also can represent the indirect communication by the third party.
As shown in Figure 2, the needle valve assembly of fuel injection apparatus comprises a valve body 10 and a needle-valve 20.Valve body 10 has 14, one oil inlet passages 16 that communicate with valve opening 14 of 12, one valve openings of valve body end of a sealing, and a plurality of nozzle opening 18 communicating with valve opening 14.Nozzle opening 18 comprises first group of nozzle opening 181 and second group of nozzle opening 182, the first angle of attack of first group of nozzle opening 181 is α, the second angle of attack of second group of nozzle opening 182 is β, the first angle of attack be α to be less than the second angle of attack be β, and the position that is communicated with of first group of nozzle opening 181 and valve opening 14 is communicated with position near valve body end 12 than second group of nozzle opening 182 and valve opening 14.
Needle-valve 20 can be in the interior to-and-fro motion of valve opening 14, and it comprises that an oil-feed annular groove 26, one first go out oil ring groove 28 and an oil supply gallery 24, and oil supply gallery 24 is communicated with oil-feed annular grooves 26 and first and goes out oil ring groove 28.Oil-feed annular groove 26 is opened in the outer circumferential face of needle-valve 20, is connected with oil inlet passage 16.First goes out the outer circumferential face that oil ring groove 28 is also located at needle-valve 20, needle-valve 20 is when position as shown in Figure 2 of its stroke, first goes out oil ring groove 28 communicates with first group of nozzle opening 181, and needle-valve 20 is when position as shown in Figure 3 of its stroke, and first goes out oil ring groove 28 communicates with second group of nozzle opening 182.
Adopt the changing load angle of attack that the needle valve assembly of said structure can be different according to motor, under the premixed pattern of the lower need of engine load, the injection advance angle of fuel oil is larger, during fuel injection beginning piston head from its top dead center position away from, the moment of fuel injection beginning is positioned at position as shown in Figure 2, first goes out oil ring groove 28 communicates with first group of nozzle opening 181, and now fuel oil sprays with less angle of attack α; Along with engine load increases, injection advance angle reduces gradually, during fuel injection beginning piston head from its top dead center position close to, now should adopt larger angle of attack, now the moment of fuel injection beginning is positioned at position as shown in Figure 3, first goes out oil ring groove 28 communicates with second group of nozzle opening 182, and now fuel oil carries out injected fuel with larger angle of attack β.Therefore, the needle valve assembly of this structure can change according to different engine loads the angle of attack of fuel oil, thereby optimizes the air-fuel mixture situation under different load.In addition, because opening or closing by the position of needle-valve 70 of needle-valve controlled, than existing needle valve assembly, conventionally with needle valve end and coordinating more easily of valve seat, control, and so not harsh to the requirement of needle-valve and valve body quality of fit yet.
As shown in Figures 2 and 3, in a kind of exemplary embodiment of needle valve assembly, oil supply gallery 24 comprises a radial passage 246, the first oil discharge passage 248 and an axial passage 242.Radial passage 246 is radially offered along needle-valve 20, the oil-feed annular groove 26 on radial communication needle-valve 20.The first oil discharge passage 248 is radially offered along needle-valve 20, and radial communication first goes out oil ring groove 28.Axial passage 242 is axially offered along needle-valve 20, to be axially communicated with radial passage 246 and the first oil discharge passage 248.
Fuel oil first enters the space between valve opening 14 and oil-feed annular groove 26 from oil inlet passage 16, via the radial passage 246 that communicates with oil-feed annular groove 26, enter axial passage 242 again, from the first oil discharge passage 248 communicating with axial passage 242, flow to first subsequently and go out oil ring groove 28.As shown in Figure 2, when first of needle-valve 20 goes out first group of nozzle opening 181 of oil ring groove 28 aligning valve bodies 10, fuel oil wherein sprays into cylinder with angle of attack α; As shown in Figure 3, when first of needle-valve 20 goes out second group of nozzle opening 182 of oil ring groove 28 aligning valve bodies 10, fuel oil wherein sprays in cylinder with angle of attack β.For clear, show that first goes out oil ring groove 28 and the first oil discharge passage 248, the needle-valve 20 in Fig. 3, not to analyse and observe demonstration, goes out oil ring groove 28 and the first oil discharge passage 248 in order to present first simultaneously.
This project organization of needle-valve 20 oil supply galleries 24 is simple, convenient, at oil-feed annular groove 26 and first, goes out the axial blind hole that oil ring groove 28 places process radial direction through hole, are connected these radial direction through hole from the end processing of needle-valve 20 again.Certainly oil supply gallery also can adopt as direct punching is communicated with oil-feed annular groove 26 and first and go out the alternate manners such as oil ring groove 28.
The another kind that Figure 4 shows that needle valve assembly is schematic, and part identical with Fig. 2 in its structure repeats no more.Referring to Fig. 4 and Fig. 2, needle-valve 20 also comprises that one second goes out oil ring groove 282 and one the 3rd and goes out oil ring groove 283, first goes out oil ring groove 28, second goes out oil ring groove 282 and the 3rd and goes out oil ring groove 283 end near ejection end 12 away from needle-valve 20 successively, and axial passage 242 is communicated with first simultaneously and goes out oil ring groove 28, second and go out oil ring groove 282 and the 3rd and go out oil ring groove 283.
Oil supply gallery 24 also comprises second oil discharge passage 247 and the 3rd oil discharge passage 249.The second oil discharge passage 247 is radially offered along needle-valve 20, and radial communication second goes out oil ring groove 282; The 3rd oil discharge passage 249 is radially offered along needle-valve 20, and radial communication the 3rd goes out oil ring groove 283.Axial passage 242 is axially communicated with radial passage 246(referring to Fig. 2), the first oil discharge passage 248, the second oil discharge passage 247 and the 3rd oil discharge passage 249.
In the exemplary embodiment shown in Fig. 4, needle-valve 20 is when its similar position as shown in Figure 2, and only first goes out oil ring groove 28 and communicate with first group of nozzle opening 181; Needle-valve 20 is when its similar position as shown in Figure 3, and only first goes out oil ring groove 28 and communicate with second group of nozzle opening 182; And at needle-valve 20 during in position as shown in Figure 4, second goes out oil ring groove 282 communicates with second group of nozzle opening 182, while the 3rd goes out oil ring groove 283 and communicates with first group of nozzle opening 181, fuel oil eject request when meeting full load, fuel oil sprays simultaneously and can reach better air-fuel mixture effect from first group of nozzle opening and second group of oil spout.
Figure 5 shows that another exemplary embodiment of needle valve assembly, part identical with Fig. 2 in its structure repeats no more, nozzle opening 18 also comprises the 3rd group of nozzle opening 183, the 3rd angle of attack γ of the 3rd group of nozzle opening 183 is greater than the second angle of attack β, certainly it is also greater than the first angle of attack α, and the position that is communicated with of the 3rd group of nozzle opening 183 and valve opening 14 is communicated with position away from valve body end 12 than second group of nozzle opening 182 and valve opening 14.
In the exemplary embodiment shown in Fig. 5, needle-valve 20 is when its similar position as shown in Figure 2, and only first goes out oil ring groove 28 and communicate with first group of nozzle opening 181; Needle-valve 20 is when its similar position as shown in Figure 3, and only first goes out oil ring groove 28 and communicate with second group of nozzle opening 182; And at needle-valve 20 during in position as shown in Figure 5, first goes out oil ring groove 28 communicates with the 3rd group of nozzle opening 183.The 3rd group of nozzle opening 183 is suitable for the situation that injection advance amount is less, thereby strengthened the scope that angle of attack changes, and improved the adaptability of motor.
Be to be understood that, although this specification is described according to each embodiment, but not each embodiment only comprises an independently technological scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should make specification as a whole, technological scheme in each embodiment also can, through appropriately combined, form other mode of executions that it will be appreciated by those skilled in the art that.
Listed a series of detailed description is above only illustrating for feasibility embodiment of the present utility model; they are not in order to limit protection domain of the present utility model; allly do not depart from equivalent embodiment or the change that the utility model skill spirit is done; as the combination of feature, cut apart or repeat, within all should being included in protection domain of the present utility model.
Claims (4)
1.
the needle valve assembly of fuel injection apparatus, comprising:
A valve body (10), described valve body (10) is provided with a valve opening (14), an oil inlet passage (16) communicating with described valve opening (14), and the nozzle opening (18) that communicates of a plurality of and described valve opening (14); With one can be in described valve opening (14) reciprocating needle-valve (20);
It is characterized in that:
Described valve body (10) has the valve body end (12) of a sealing;
Described nozzle opening (18) comprises first group of nozzle opening (181) and second group of nozzle opening (182), first angle of attack (α) of described first group of nozzle opening (181) is less than second angle of attack (β) of described second group of nozzle opening (182), and the position that is communicated with of described first group of nozzle opening (181) and described valve opening (14) is communicated with position near described valve body end (12) than described second group of nozzle opening (182) and described valve opening (14);
Described needle-valve (20) comprising:
An oil-feed annular groove (26), it is opened in described needle-valve (20) outer circumferential face and is connected with described oil inlet passage (16);
One first goes out oil ring groove (28), it is opened in described needle-valve (20) outer circumferential face, during the position of described needle-valve (20) in its stroke, this first goes out oil ring groove (28) and communicates with described first group of nozzle opening (181), and during another position in its stroke of described needle-valve (20), this first goes out oil ring groove (28) and communicate with described second group of nozzle opening (182); With
Be opened in the oil supply gallery (24) in described needle-valve (20), it goes out oil ring groove (28) for being communicated with described oil-feed annular groove (26) and described first.
2.
needle valve assembly as claimed in claim 1, wherein said oil supply gallery (24) comprising:
A radial passage (246) of radially offering along described needle-valve (20), oil-feed annular groove (26) described in its radial communication;
First oil discharge passage (248) of radially offering along described needle-valve (20), first goes out oil ring groove (28) described in its radial communication;
An axial passage (242) of axially offering along described needle-valve (20), it is axially communicated with described radial passage (246) and described the first oil discharge passage (248).
3.
needle valve assembly as claimed in claim 2, wherein,
Described needle-valve (20) also comprises that one second goes out oil ring groove (282) and one the 3rd and goes out oil ring groove (283), and described first goes out oil ring groove (28), described second goes out oil ring groove (282) and the described the 3rd and go out oil ring groove (283) end near described valve body end (12) away from described needle-valve (20) successively;
Described oil supply gallery (24) also comprises:
Second oil discharge passage (247) of radially offering along described needle-valve (20), second goes out oil ring groove (282) described in its radial communication,
The 3rd oil discharge passage (249) of radially offering along described needle-valve (20), the 3rd goes out oil ring groove (283) described in its radial communication,
Described axial passage (242) is communicated with described radial passage (246), described the first oil discharge passage (248), described the second oil discharge passage (247) and described the 3rd oil discharge passage (249);
During the another position of described needle-valve (20) in its stroke, described second goes out that oil ring groove (282) communicates with described second group of nozzle opening (182) and the described the 3rd goes out oil ring groove (283) and communicate with described first group of nozzle opening (181).
4.
?needle valve assembly as claimed in claim 2, wherein said nozzle opening (18) also comprises the 3rd group of nozzle opening (183), the 3rd angle of attack (γ) of described the 3rd group of nozzle opening (183) is greater than second angle of attack (β) of described second group of nozzle opening (182), and the position that is communicated with of described the 3rd group of nozzle opening (183) and described valve opening (14) is communicated with position away from described valve body end (12) than described second group of nozzle opening (182) and described valve opening (14), during the another position of described needle-valve (20) in its stroke, described first goes out oil ring groove (28) communicates with described the 3rd group of nozzle opening (183).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420196172.6U CN203809182U (en) | 2014-04-22 | 2014-04-22 | Needle valve assembly for fuel injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420196172.6U CN203809182U (en) | 2014-04-22 | 2014-04-22 | Needle valve assembly for fuel injection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809182U true CN203809182U (en) | 2014-09-03 |
Family
ID=51447947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420196172.6U Expired - Lifetime CN203809182U (en) | 2014-04-22 | 2014-04-22 | Needle valve assembly for fuel injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203809182U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982350A (en) * | 2014-04-22 | 2014-08-13 | 江苏大学 | Needle valve component for fuel injection device |
-
2014
- 2014-04-22 CN CN201420196172.6U patent/CN203809182U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982350A (en) * | 2014-04-22 | 2014-08-13 | 江苏大学 | Needle valve component for fuel injection device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |