CN101294531A - Electric-controlled gasoline ejector - Google Patents
Electric-controlled gasoline ejector Download PDFInfo
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- CN101294531A CN101294531A CNA2007100520699A CN200710052069A CN101294531A CN 101294531 A CN101294531 A CN 101294531A CN A2007100520699 A CNA2007100520699 A CN A2007100520699A CN 200710052069 A CN200710052069 A CN 200710052069A CN 101294531 A CN101294531 A CN 101294531A
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- tube core
- spool
- housing
- electric
- guide pin
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Abstract
The invention relates to an electric control gasoline injector, which mainly comprises a housing, a valve, an orifice plate, a valve seat, a flux sleeve, a tube core, an end cover, a guide bushing, a magnetic coil, a degaussing structure, an oil inlet and a spring; wherein, the guide bushing in which the valve core is arranged is arranged on one end of the housing; an inner hole of the valve core is provided with the spring; the orifice plate and the valve seat are sequentially arranged at one end of the guide bushing along the axial direction; the magnetic coil with a coil holder and a conductive magnet structure formed by the end cover and the tube core is sequentially arranged at the other end of the housing; the inner hole at one end of the tube core is provided with a hollow open spring pin, the end part of the end forms an oil inlet channel by welding with one end of the oil inlet tube; outer edge of a boss of the end cover is fixedly connected with the inner hole of the housing through welding; one end of a magnetic isolating sleeve manufactured by the flux sleeve and unmagnetized metal material is axially butted, welded and arranged inside the through hole of the end cover and between the tube core and the guide bushing; the lower end of the magnetic isolating sleeve is fixedly connected with the guide bushing by welding; a magnetic isolating structure is positioned next to the tube core and the valve core. The oil injector has the advantages of good consistence of product performance, low processing difficulty and low cost.
Description
Technical field:
The present invention relates to the oil sprayer that a kind of electric-controlled petrol engine fuel injection system uses, particularly be applicable to the electric-controlled gasoline ejector of common rail electric-controlling petrol engine fuel supply system.
Background technique:
Electric-controlled gasoline ejector is the vitals of modern gasoline motor, it is accurate at present to have fuel injection quantity at the petrol engine of usefulness with electric-controlled gasoline ejector, to the fast characteristics of electric excitation signal response, but these gasoline ejector processing conditions require high, difficulty is big, the cost height, the applicant has applied for a kind of product performance high conformity in 2006 for this reason, but require lower to processing conditions, difficulty of processing is little, the electric-controlled gasoline ejector that cost is low (number of patent application is 2006200960153), the applicant after further research, find, the part of this electric-controlled gasoline ejector also exists and remains improvements, such as: the core construction complexity, the processing and fabricating trouble, material consumption is many or the like.
Summary of the invention:
The technical problem to be solved in the present invention is: the number of patent application to the applicant is: 2006200960153 electric-controlled gasoline ejector further improves, " electric-controlled gasoline ejector " that provide a kind of its product performance of further improvement, has improved processing conditions, can reduce production costs is to solve the structure that existing electric-controlled gasoline ejector part also exists and processing technology is simple not enough, many or the like the deficiencys of material consumption.
The technological scheme that solves the problems of the technologies described above is: a kind of electric-controlled gasoline ejector, comprise housing, spool, orifice plate, valve seat, guide pin bushing, concentrating flux sleeve, end cap, tube core, magnetic shield, electromagnetic coil, the demagnetization structure, oil inlet pipe and spring, the guide pin bushing that spool is housed in it is contained in an end of housing, one end of guide pin bushing order vertically is equipped with by valve seat, orifice plate, protecting cover and O RunddichtringO, the electromagnetic coil of band coil holder is housed successively and by end cap be inserted in tube core in the end cap at the other end of housing, described end cap is the annulus that has a boss, tube core is the middle pipe that has boss, the projection section of tube core and end cap drive fit, spring is contained in the spool endoporus and stretches in the tube core endoporus, the middle part of tube core has groove, O-ring seals is housed in it, hollow opening resilient key is housed in the hole of the other end of tube core, tube core should dock welding formation oil inlet passage by the end cylindrical with the lower end of oil inlet pipe, the boss outer rim of end cap pack into housing endoporus by to foreign round the welding be fixedly linked, the be coaxial docking welding and being installed in the end cap through hole of one end of concentrating flux sleeve and the magnetic shield of making by unmagnetized metallic material, between tube core and the guide pin bushing, magnetic shield lower end and guide pin bushing are fixedly connected by welding, and the demagnetization structure is positioned at tube core and spool abutting end.
Because adopt said structure, the present invention with the beneficial effect that existing electric-controlled gasoline ejector is compared is: be easy to producing stay-in-grade product in enormous quantities under the processing conditions cheaply.This is because adopted above structural type, makes that processing technology is simplified, the cooperation between the part is more convenient, mainly contain following some:
One, processing technology simplification, processing and fabricating convenience:
1, the housing of oil sprayer is made of permeability magnetic material, and housing plays the effect of magnetic conduction, is the part of magnetic circuit, cylindrical has a groove that the O RunddichtringO is installed, sealing when being used to install, the endoporus of housing is the secondary shoulder hole, adds the coaxality that is easy to guarantee the hole man-hour;
2, the endoporus of guide pin bushing is a secondary shoulder hole, the processing of endoporus can be finished by a clamping, the coaxality of secondary shoulder hole is guaranteed, valve seat and spool are installed in the guide pin bushing, its working position is only relevant with guide pin bushing, and irrelevant with nozzle holder, has reduced the fuel leakage that causes because of valve seat and housing coaxiality deviation to greatest extent, thereby reduced the requirement of housing machining accuracy, reduced processing cost;
3, original iron core that plays the magnetic conduction effect is changed into by end cap and be inserted in the split type magnetic conduction construction that the tube core in the end cap is formed, make the good manufacturability of product, the reliability height, and can save material;
4, spool is the part of a weak point, light weight, and spool is made of permeability magnetic material, and cylindrical is the secondary multidiameter shaft shape of arc transition, is the through hole of a secondary along valve core axis, and the little end of valve core diameter has welded a steel ball; Steel ball is used for playing when contacting with valve seat the effect of sealing, and spool plays the effect of armature and logical oil, and the spool external cylindrical surface plays the effect of guiding and is easy to processing.
Two, improve sealability:
(1) use a plurality of O RunddichtringOs to form flexible sealing dexterously, both guaranteed airtight quality, improved the assembly technology performance again:
Do not adopt the fit sealing of rigidity between valve seat and the guide pin bushing, but between valve seat and guide pin bushing, reserved the gap, valve seat can be placed on the seam of guide pin bushing when mounted easily, be convenient to the correcting of valve seat and spool like this, the valve seat O RunddichtringO of packing between valve seat and the guide pin bushing prevents fuel leakage, valve seat and orifice plate do not adopt the fit sealing of rigidity yet, but orifice plate and protecting cover are packed into, and be fixing in the end face welding of guide pin bushing and protecting cover.
Simultaneously, place the seal ring with spool end unshakable in one's determination to cancel, change the radial seal between concentrating flux sleeve and tube core into, further improved its sealability former.
(2) increase a concentrating flux sleeve with the identical size of magnetic shield, and concentrating flux sleeve and magnetic shield welded together coaxially be installed in the end cap through hole, between tube core and the guide pin bushing, magnetic shield lower end and guide pin bushing are fixedly connected by welding, and have further improved sealability.
Three, improve the switch on and off characteristic of solenoid valve, improved the high frequency response characteristic of oil sprayer:
The present invention welds together with the magnetic shield made from non-magnet material coaxially at the less end of guide pin bushing diameter, make by guide pin bushing and increase to the magnetic resistance the magnetic conductance seat, the spool that forces the magnetic line of force to be done by permeability magnetic material in being installed in guide pin bushing arrives tube core, formation is from tube core, concentrating flux sleeve, end cap, shell, guide pin bushing, spool, air gap between spool and the tube core, nullification magnetic sheet make spool obtain the electromagnetic force that moves in guide pin bushing to the magnetic loop of tube core.
Simultaneously, on the magnetic conductance seat end face adjacent, apply or be welded with the unmagnetized material with spool, nullification magnetic sheet is a shallow disc shape, also can be flat, because the existence of the unmagnetized material of nullification magnetic sheet or coating, when electric excitation signal stops, having reduced the adverse effect of permeability magnetic material remanent magnetism, improved the high frequency response characteristic of oil sprayer the spool seating velocity.
Below, the technical characteristics to the present invention's electric-controlled gasoline ejector is further described in conjunction with the accompanying drawings and embodiments.
Description of drawings:
Fig. 1: overall structure schematic representation---the sectional view of the present invention's electric-controlled gasoline ejector;
Fig. 2: tube core structure schematic representation;
Fig. 3: end cover structure schematic representation:
Fig. 3-1: the main sectional view, the plan view of Fig. 3-2: Fig. 3-1 looked;
Fig. 4: concentrating flux sleeve structural representation---the sectional view that is connected with magnetic shield;
Fig. 5: shell construction schematic representation;
Fig. 6: guide pin bushing structural representation;
Fig. 7～Fig. 8: the valve core structure schematic representation that has steel ball:
Fig. 7-master looks sectional view, the left view of Fig. 8-Fig. 7;
Fig. 9: valve seat construction schematic representation---sectional view;
Figure 10～Figure 11: resilient key structural representation:
Figure 10-master looks sectional view, the left view of Figure 11-Figure 10.
Among the figure:
The 1-oil inlet pipe, 2-tube core, 21-tube core upper end, the boss on the 22-tube core, 23-tube core middle part, the groove at 231-tube core middle part, 24-tube core endoporus, 3-end cap, the boss of 31-end cap lower end, the through hole of 32-end cap, the step of 33-end cap upper end, the threading hole on the 34-step; The 4-concentrating flux sleeve, 5-magnetic shield, 6-housing, the 61-undercut groove, 62-housing secondary stepped shaft endoporus, 7-guide pin bushing, the guide pin bushing circumference that 71-cooperates with housing, 72-guide pin bushing secondary stepped shaft endoporus, 8-spool, 81-spool secondary stepped shaft endoporus, 82-inclined hole, 83-steel ball, the 9-valve seat, 91-taper hole, the hole that 92-connects, 93-ring-type cutting groove, 10-orifice plate, 11-protecting cover, the 12-O RunddichtringO, 13-oil pocket, 14-nullification magnetic sheet, the 15-electromagnetic coil, the 16-coil holder, the fairlead on the 161-coil holder, 17-spring, the 18-O RunddichtringO, the 19-resilient key.
Embodiment:
A kind of electric-controlled gasoline ejector, form by housing, spool, guide pin bushing, magnetic shield, concentrating flux sleeve, tube core, electromagnetic coil, demagnetization structure, oil inlet pipe, spring, the guide pin bushing 7 that spool 8 is housed in it is contained in an end of housing 6, one end of guide pin bushing 7 order vertically also is equipped with valve seat 9, orifice plate 10, protecting cover 11 and O RunddichtringO 12, the other end at housing 6 is equipped with electromagnetic coil 15 and the end cap 3 and the tube core 2 that is inserted in the end cap 3 of being with coil holder 16 successively, end cap 3 is annulus that its lower end has boss 31, there is step 33 upper end, and two threading holes 34 are arranged on the step; Tube core 2 is the middle pipe that has boss 22, the projection section of tube core and end cap drive fit, spring 17 is contained in spool 8 endoporus and stretches in the tube core endoporus 24, the middle part 23 of tube core 2 has groove 231, O-ring seals 18 is installed in it, hollow opening resilient key 19 is housed in the hole of the upper end 21 of tube core 2, tube core 2 should dock welding formation oil inlet passage 101 by the end cylindrical with the lower end of oil inlet pipe 1, the endoporus of boss 31 outer rims of end cap 3 and the housing 6 of packing into is fixedly linked by welding to foreign round, the be coaxial docking welding and being installed in the end cap through hole 32 of one end of concentrating flux sleeve 4 and the magnetic shield of making by unmagnetized metallic material 5, between tube core 2 and the guide pin bushing 7, magnetic shield 5 lower ends and guide pin bushing 7 are fixedly connected by welding, and are welded with the nullification magnetic sheet 14 made with the unmagnetized material (referring to Fig. 1～Fig. 4) on adjacent tube core 2 end faces of tube core 2 and spool 8.
Described housing 6 usefulness permeability magnetic materials are made, its profile is a secondary multidiameter shaft shape, along the axis extension of housing 6 and the endoporus that connects also is the secondary shoulder hole, a undercut groove 61 is arranged on the cylindrical of housing 6 diameter small ends, during use, can place O RunddichtringO (referring to Fig. 1, Fig. 5) in it.
Described guide pin bushing 7 adopts the magnetic material of low-coercivity to make, its profile is stair-stepping circular shaft, has secondary stepped shaft endoporus 72 (referring to Fig. 1, Fig. 6) in it vertically.
The secondary ladder pipe that described spool 8 is outer rim arc transition, have secondary stepped shaft endoporus 81 in it vertically, the shaft part middle part that spool 8 diameters are little evenly has 4 inclined holes 82 along the external diameter circumference, the center line of 4 inclined holes tilts to the axle head of welding steel ball in its face respectively, and the axle head of spool 8 minor diameters and steel ball 83 welding form spherical spool (referring to Fig. 1, Fig. 7, Fig. 8).
One end of valve seat 9 has a taper hole 91, the other end has a hole 92 of extending and connecting along axis, and its cylindrical has a ring-type cutting groove 93, and O RunddichtringO 12 places in the ring-type cutting groove 93, orifice plate 10 is sheet metals of a circle, and little through hole (referring to Fig. 1, Fig. 9) is arranged on disk.
Described demagnetization structure is to be welded on the nullification magnetic sheet made from the unmagnetized material on adjacent tube core 2 end faces of tube core 2 and spool 8 14 (referring to Fig. 1); Nullification magnetic sheet 14 is shallow disc shape or flat circle sheet, and is middle porose.
As a kind of conversion of the embodiment of the invention, nullification magnetic sheet 14 also can not be welded on tube core 2 end faces, but is welded on the spool end of spool 8 and tube core 2 adjacent ends.
Another conversion as the embodiment of the invention, on the tube core end face of tube core 2 end adjacent, also can not weld nullification magnetic sheet 14 with spool, but apply one deck unmagnetized material, and certainly, also can be on the spool end of the adjacent end of spool with tube core with this layer unmagnetized material coated.
Installation method:
Operating principle and working procedure:
Tube core 2 is inserted in the end cap 3, guide pin bushing 7 is made by permeability magnetic material, coaxial the welding together of one end of the less end of guide pin bushing diameter and the magnetic shield made from non-magnet material 5, the concentrating flux sleeve 4 in the other end of magnetic shield 5 and the same footpath made from permeability magnetic material is coaxial welds together and is installed in the end cap through hole 32, between tube core 2 and the guide pin bushing 7, radial direction seal ring 18 is arranged on tube core 2, make the gasoline that enters oil sprayer from oil inlet pipe can't enter coil, gasoline is limited in from oil inlet pipe 1 to valve seat in 9 the passage, magnetic shield 5 makes by guide pin bushing 7 and increases to the magnetic resistance tube core 2 and the end cap 3 simultaneously, the spool 8 that forces the magnetic line of force to be done by permeability magnetic material in being installed in guide pin bushing 7 arrives tube core 2, formation is from tube core 2, concentrating flux sleeve 4, end cap 3, shell 6, guide pin bushing 7, spool 8, air gap between spool 8 and the tube core 2, nullification magnetic sheet 14 makes spool obtain the electromagnetic force that moves in guide pin bushing to the magnetic loop of tube core 2.
Gasoline enters oil sprayer from filler opening, arrive the oil pocket 13 of valve seat 9 tops and guide pin bushing 7 formation through the endoporus 24 of oil inlet pipe 1, tube core 2, the endoporus 81 of spool 8, the inclined hole 82 of spool 8, when electromagnetic coil 15 is subjected to the electrical signal excitation, spool 8 overcomes spring force and moves to tube core 2 under the effect of electromagnetic force, spool 8 lifts off a seat 9, gasoline is from the metering-orifice ejection of valve seat 9 through orifice plate 10, when the electromagnetic excitation signal stops, under the effect of spring force, spool 8 is taken a seat, the steel ball 83 of spool 8 contacts with valve seat 9 and forms sealing state, and gasoline injection stops.
Claims (10)
1, a kind of electric-controlled gasoline ejector, comprise housing, spool, orifice plate, valve seat, guide pin bushing, concentrating flux sleeve, end cap, tube core, magnetic shield, electromagnetic coil, the demagnetization structure, oil inlet pipe and spring, it is characterized in that: the guide pin bushing (7) that spool (8) are housed in it is contained in an end of housing (6), one end of guide pin bushing (7) order vertically is equipped with valve seat (9), orifice plate (10), protecting cover (11) and O RunddichtringO (12), the electromagnetic coil (15) and the end cap (3) of band coil holder (16) is housed successively and is inserted in tube core (2) in the end cap (3) at the other end of housing (6), described end cap (3) is the annulus that has a boss, tube core (2) has the pipe of boss (22) for the centre, the projection section of tube core and end cap drive fit, spring (17) is contained in spool (8) endoporus and stretches in the tube core endoporus (24), the middle part (23) of tube core (2) has groove (231), O-ring seals (18) is housed in it, in the hole of the upper end (21) of tube core (2) hollow opening resilient key (19) is housed, this end cylindrical of tube core (2) docks welding and forms oil inlet passage (101) with the lower end of oil inlet pipe (1), pack into the welding of endoporus by to foreign round of housing (6) of boss (31) outer rim of end cap (3) is fixedly linked, the be coaxial docking welding and being installed in the end cap through hole (32) of one end of concentrating flux sleeve (4) and the magnetic shield of making by unmagnetized metallic material (5), between tube core (2) and the guide pin bushing (7), magnetic shield (5) lower end and guide pin bushing (7) are fixedly connected by welding, and the demagnetization structure is positioned at tube core (2) and spool (8) abutting end.
2, electric-controlled gasoline ejector according to claim 1, it is characterized in that: described spool (8) is the secondary ladder pipe of outer rim arc transition, have secondary stepped shaft endoporus (81) in it vertically, the shaft part middle part that spool (8) diameter is little evenly has 4 inclined holes (82) along the external diameter circumference, the center line of 4 inclined holes tilts to the axle head of welding steel ball in its face respectively, and the axle head of spool (8) minor diameter and steel ball (83) welding form spherical spool.
3, electric-controlled gasoline ejector according to claim 1 and 2, it is characterized in that: an end of valve seat (9) has a taper hole (91), the other end has a hole (92) of extending and connecting along axis, there is a ring-type cutting groove (93) at the middle part, and O RunddichtringO (12) places this ring-type cutting groove (93).
4, electric-controlled gasoline ejector according to claim 3 is characterized in that: the magnetic material of described guide pin bushing (7) employing low-coercivity is made, its profile is stair-stepping circular shaft, has secondary stepped shaft endoporus (72) in it vertically.
5, electric-controlled gasoline ejector according to claim 4, it is characterized in that: described housing (6) is a secondary multidiameter shaft shape with permeability magnetic material making, its profile, along the axis extension of housing (6) and the endoporus that connects also is the secondary shoulder hole, on the cylindrical of housing (6) diameter small end a undercut groove (61) is arranged.
6, electric-controlled gasoline ejector according to claim 5 is characterized in that: described demagnetization structure is the nullification magnetic sheet (14) that is welded on tube core (2) tube core (2) end face adjacent with spool (8) or is welded on the spool end of spool and tube core (2) abutting end, makes with the unmagnetized material.
7, electric-controlled gasoline ejector according to claim 6 is characterized in that: nullification magnetic sheet (14) is shallow disc shape or flat circle sheet.
8, electric-controlled gasoline ejector according to claim 7 is characterized in that: described resilient key (19) is the metal tube of angle of circumference less than 360 degree, and an end has tapering.
9, electric-controlled gasoline ejector according to claim 8 is characterized in that: orifice plate (10) is the sheet metal of a circle, and little through hole is arranged on disk.
10, electric-controlled gasoline ejector according to claim 5 is characterized in that: described demagnetization structure is on the tube core end face of tube core (a 2) end adjacent with spool or one deck unmagnetized material that applies on the spool end of spool (a 8) end adjacent with tube core (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100520699A CN101294531B (en) | 2007-04-24 | 2007-04-24 | Electric-controlled gasoline ejector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100520699A CN101294531B (en) | 2007-04-24 | 2007-04-24 | Electric-controlled gasoline ejector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101294531A true CN101294531A (en) | 2008-10-29 |
| CN101294531B CN101294531B (en) | 2011-12-14 |
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ID=40065018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100520699A Expired - Fee Related CN101294531B (en) | 2007-04-24 | 2007-04-24 | Electric-controlled gasoline ejector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101294531B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102608A (en) * | 2010-09-08 | 2011-06-22 | 柳州源创电喷技术有限公司 | High-speed response electromagnetic valve type fuel injector for motorcycle |
| CN102767453A (en) * | 2012-07-11 | 2012-11-07 | 江门市威宇系统技术有限公司 | Electric gasoline injector |
| CN106205944A (en) * | 2016-07-25 | 2016-12-07 | 成都威特电喷有限责任公司 | Heat-insulating and sealing electromagnet assembly |
| CN107152360A (en) * | 2017-07-03 | 2017-09-12 | 东莞市盈森汽车电喷科技有限公司 | High-performance fuel injector |
| CN112594106A (en) * | 2021-01-27 | 2021-04-02 | 广东津宇新能源技术有限公司 | Electric metering hole structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372313A (en) * | 1993-02-16 | 1994-12-13 | Siemens Automotive L.P. | Fuel injector |
| US5427319A (en) * | 1994-03-24 | 1995-06-27 | Siemens Automotive L.P. | Fuel injector armature assembly |
| CN201025195Y (en) * | 2007-04-24 | 2008-02-20 | 柳州华威电控技术有限公司 | Electrically controlled gasoline oil sprayer |
-
2007
- 2007-04-24 CN CN2007100520699A patent/CN101294531B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102608A (en) * | 2010-09-08 | 2011-06-22 | 柳州源创电喷技术有限公司 | High-speed response electromagnetic valve type fuel injector for motorcycle |
| CN102767453A (en) * | 2012-07-11 | 2012-11-07 | 江门市威宇系统技术有限公司 | Electric gasoline injector |
| CN102767453B (en) * | 2012-07-11 | 2014-07-02 | 江门市威宇系统技术有限公司 | Electric gasoline injector |
| CN106205944A (en) * | 2016-07-25 | 2016-12-07 | 成都威特电喷有限责任公司 | Heat-insulating and sealing electromagnet assembly |
| CN106205944B (en) * | 2016-07-25 | 2019-02-05 | 成都威特电喷有限责任公司 | Heat-insulating and sealing electromagnet assembly |
| CN107152360A (en) * | 2017-07-03 | 2017-09-12 | 东莞市盈森汽车电喷科技有限公司 | High-performance fuel injector |
| CN112594106A (en) * | 2021-01-27 | 2021-04-02 | 广东津宇新能源技术有限公司 | Electric metering hole structure |
| CN112594106B (en) * | 2021-01-27 | 2024-05-07 | 广东瀚宇新能源装备有限公司 | Electric measuring hole structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101294531B (en) | 2011-12-14 |
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Application publication date: 20081029 Assignee: Yongzhou Australia Automotive Electronics Co., Ltd. Assignor: Liuzhou Hwowell E-C Technology Co., Ltd. Contract record no.: 2012430000161 Denomination of invention: Electric control gasoline injector Granted publication date: 20111214 License type: Exclusive License Record date: 20120803 |
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Application publication date: 20081029 Assignee: Yongzhou Australia Automotive Electronics Co., Ltd. Assignor: Liuzhou Hwowell E-C Technology Co., Ltd. Contract record no.: 2012430000161 Denomination of invention: Electric control gasoline injector Granted publication date: 20111214 License type: Exclusive License Record date: 20120803 |
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