CN105370445A - Gas injector having determined microstructure on sealing surface - Google Patents
Gas injector having determined microstructure on sealing surface Download PDFInfo
- Publication number
- CN105370445A CN105370445A CN201510487241.8A CN201510487241A CN105370445A CN 105370445 A CN105370445 A CN 105370445A CN 201510487241 A CN201510487241 A CN 201510487241A CN 105370445 A CN105370445 A CN 105370445A
- Authority
- CN
- China
- Prior art keywords
- microstructure
- gas ejector
- sealing
- sealing surface
- gas
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
- F02M21/0269—Outwardly opening valves, e.g. poppet valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Fuel-Injection Apparatus (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to a gas injector having a determined microstructure on a sealing surface. The gas injector comprises a valve closing element (2) used for opening and closing a flow opening (3) and a valve seat (4) having a second sealing surface (6). The valve closing element (2) is provided with a first sealing surface (5). At least one of the sealing surface is provided with microstructure (7) in a determined geometrical shape.
Description
Technical field
The present invention relates to a kind of gas ejector for spraying into vaporized fuel, it has sealing surface, and described sealing surface has the clearly defined microstructure of geometrical shape.
Background technique
At present, the vehicle such as carrying out gas-powered with rock gas or hydrogen is used more and more widely.But with liquid fuel differently, vaporized fuel has different requirements, thus needs the sparger of special exploitation.Particularly when gas directly sprays into, wherein, gas is directly injected in firing chamber, because the high pressure of gas must adopt new method with the lubrication lacked.By gas ejector is directly arranged in firing chamber place, in order to seal because the high temperature at firing chamber place can not use such as elastomeric seal member.In addition, due to the density that gas is lower than liquid fuel, gas ejector must expose large cross section in opening state.
Summary of the invention
On the other hand, the advantage had for the gas ejector spraying into vaporized fuel with feature described in claim 1 according to the present invention to realize the sealing improved.In addition, described sealing can be realized within the whole service life of gas ejector.At this, even if there is the smallest particles that such as can be produced by output shaft at gas ejector run duration, also ensure that described sealing, and sealing seat can not be damaged like this, namely can not negatively damage described sealing in the opening state of gas ejector.According to the present invention, this can realize in the following way, have primary sealing area, and valve seat has secondary sealing area for valve closing element, the such as needle opening and closing through-flow openings, in the closed condition of gas ejector, described secondary sealing area closes through-flow openings.At this, arrange at least one sealing surface according to the present invention and there is the microstructure determining geometrical shape.The recess that the surface of sealing surface is such as determined by arranging geometrical shape constructs microstructure.At this, microstructure preferably has the degree of depth of about 10 μm.By arranging the microstructure determined, reducing sealing surface in the closed condition of gas ejector like this and being in the region of effectively contact, namely can realize high surface pressure, and not need to increase sealing force with identical degree for this reason.In addition, the geometrical shape of the determination of microstructure ensure that, very high stability is there is for the abrasion of particles being only difficult to avoid, because by the microstructure between sealing surface exist all the time multiple two sealings to the closed line between part, described closed line prevents from producing leakage path in off position.
Preferably, microstructure is arranged on primary sealing area and secondary sealing area.Still seal reliably in the working life that part can be implemented in gas ejector by microstructure being arranged on two sealings.
Further preferably, described microstructure is configured on the closed region of annular on one of described sealing surface, preferably on two sealing surfaces.
Preferably, the area of the microstructure in described sealing surface is less than the surface of contact in gas ejector closed condition between these two sealing surfaces.Therefore, manufacture cost particularly can be made to keep relatively low.Alternatively, the area of the microstructure in described sealing surface is greater than the surface of contact between these two sealing surfaces.Therefore, when particularly may there are increasing these two sealings to surface of contact in part within working life, all the time can also guarantee these two sealings to the reliable sealing on the contact area of part, because contact area is covered by the microstructure of larger geometrical shape all the time.
Further preferably, at least 50% microstructure being provided with geometrical shape of the surface of contact of sealing surface.
Further preferably, the valve seat of gas ejector is flat seat or cone seat.So correspondingly be configured with the sealing surface of valve closing element.
According to a particularly preferred configuration of the present invention, the microstructure determined comprises the recess (groove) of multiple annular extended on sealing surface.At this, the recess of described annular is arranged relative to each other with one heart, and therefore achieves the multi-sealed of parallel connection along flow direction by multiple concentric potted line.Preferably, the groove of described annular is interrupted by connecting sheet.This contributes to suppressing the leakage paths on the recess of annular efficiently.
According to an interchangeable configuration of the present invention, the microstructure of geometrical shape comprises the recess of multiple ellipse or rectangle.
The microstructure that geometrical shape is determined preferably manufactures by means of laser.Also the structure of other geometrical shapies, such as oval, n dihedral or the circumferentially shallow slot that extends of direction can be considered.
Further preferably, valve closing element is the closing element inwardly opened or the closing element outwards opened.The closing element outwards opened particularly preferably is set at this, because particularly large cross section can be opened with little stroke thus, thus enough gas flows can be sprayed in of short duration spraying in the time.
In addition, the present invention relates to a kind of internal-combustion engine, it has firing chamber and according to gas ejector of the present invention, wherein, gas ejector is directly arranged on firing chamber, directly to spray into vaporized fuel.
Accompanying drawing explanation
Below with reference to the accompanying drawings preferred embodiment of the present invention is explained.In accompanying drawing:
Fig. 1 illustrates the schematic perspective view of gas ejector according to an embodiment of the invention,
Fig. 2 shows the schematic partial section of Fig. 1,
The schematic plan view of the microstructure that the geometrical shape that Fig. 3 shows the sealing surface of Fig. 1 is determined,
Fig. 4 shows the sectional view of Fig. 3,
Fig. 5 shows the view as Fig. 3 of the defect in the microstructure determined in geometrical shape with existence,
Fig. 6 illustrates the schematic perspective view of the gas ejector according to the second embodiment,
Fig. 7 shows the schematic sectional view of Fig. 1,
Fig. 8 illustrates the schematic perspective view of gas ejector according to the third embodiment of the invention,
Fig. 9 and 10 illustrates the schematic plan view of the microstructure that other different preferred geometrical shapies are determined.
Embodiment
The gas ejector 1 for directly being sprayed into by vaporized fuel in firing chamber 10 is explained below with reference to Fig. 1 to 5.
As by shown in Fig. 1 and 2, gas ejector 1 comprises valve closing element 2 and valve seat 4.When as when axially being moved by closing element 2 shown in double-head arrow A, through-flow openings 3 is unlocked or closes between closing element 2 and valve seat 4.
Primary sealing area 5 is arranged on valve closing element 2.Secondary sealing area 6 is configured on valve seat 4.The microstructure 7 that geometrical shape is determined is configured on primary sealing area 5.Microstructure 7 comprises multiple recess 70, and described recess such as manufactures by means of laser.Secondary sealing area 6 does not construct microstructure.Sealing surface 6 is manufactured by the method for traditional method of surface finish, such as grinding or this class.
The microstructure that geometrical shape shown in Fig. 3 to 5 is determined.As illustrated in fig. 3, the recess 70 of microstructure 7 that geometrical shape is determined is basic oval.At this, each recess lays respectively on a common line L.For better simple and clear object, a line L is only shown in Fig. 3 to 5.Line L is annular wire, because the gas ejector of the first embodiment is the gas ejector (see Fig. 1) with flat seat.At this, multiple recess is arranged on multiple annular wire L extended with one heart relative to each other.As shown in Figure 3, the recess 70 on annular wire adjacent respectively circumferentially misplaces in direction a little.At this, recess 70 all constructs in the same manner.But this is not like this, but can consider yet, different annular wire L has the shape that different geometrical shapies is determined.
Fig. 5 schematically illustrates, when during closing process, the material of such as particle or this class is in this two sealing surfaces 5, to the possibility of the damage 8 of microstructure 7 time between 6.Therefore, can set up the connection between adjacent recess 70, this is illustrated by double-head arrow D.But in off position in can not produce connection along flow direction C towards between the side 11 of firing chamber and the side 12 of firing chamber dorsad, because remain two sealing surfaces 5 by multiple ring with recess, at least one the closed potted line between 6.
As directly by Fig. 3 to 5 Suo Shi, by the surface structuration of the determination by means of microstructure, decrease the effective bearing area between two sealing surfaces.This can not produce the additional leakage paths along flow direction C.Even if the material due to particle or this class causes the accumulation of damage 8, also indirectly form the leakage paths of flow direction C.Absolutely not by arranging multiple recess 70 in the mode of dislocation along flow direction C, within working life, produce leakage paths.
In addition, primary sealing area 5 and secondary sealing area 6 directly contact area 9 shown in Fig. 3 to 5, this 91 and 92 illustrates by a dotted line.In a first embodiment, contact area 9 is less than the area of microstructure 7 at this.Therefore, can particularly along with the service time increased also to bear the distortion of issuable valve seat 4 by the larger area of microstructure 7, described valve seat may increase in the direction of the width.
Fig. 6 and 7 illustrates gas ejector 1 according to a second embodiment of the present invention.Be different from the first embodiment ground, the gas ejector 1 of the second embodiment is provided with cone seat.At this, the contact area 9 of the second embodiment is greater than the area of microstructure 7.In other respects, described embodiment is corresponding to aforesaid embodiment, thus the explanation that can provide with reference to there.
Fig. 8 illustrates gas ejector 1 according to the third embodiment of the invention.3rd embodiment is substantially corresponding to the second embodiment, and wherein, primary sealing area 5 has the shape that cross section is arc.Secondary sealing area 6 is same is that corresponding arc constructs with cross section.
Fig. 9 and 10 illustrates the other according to embodiments of the invention of the microstructure 7 that the geometrical shape for sealing surface is determined.Microstructure 7 shown in Fig. 9 is consisted of the groove that circumferentially direction is interrupted.At this, additional contact pin 72 is set.
Figure 10 illustrates microstructure 7, constructs oval recess 70 in described microstructure.Oval recess 70 is arranged on multiple parallel potted line L equally again.
Therefore, can reduce to such at least one sealing surface of part the sealing area being in effectively contact two sealings by microstructure processing geometrical shape determined according to the present invention, namely sealing can be realized to the high surface pressure between part, and the sealing force needed for therefore need not increasing with identical degree.In addition, can be realized by the special configuration of microstructure 7, as schematically shown in Figure 5, gas ejector according to the present invention is extremely robusts for the wearing and tearing caused by particle.
Claims (12)
1., for spraying into a gas ejector for vaporized fuel, it comprises
-for opening and closing the valve closing element (2) of a through-flow openings (3),
-wherein, described valve closing element (2) has primary sealing area (5); And
-there is the valve seat (4) of secondary sealing area (6),
-wherein, at least one of described sealing surface has the microstructure (7) being with the geometrical shape determined.
2. gas ejector according to claim 1, is characterized in that, described microstructure (7) is arranged on described primary sealing area (5) and/or described secondary sealing area (6).
3. according to gas ejector in any one of the preceding claims wherein, it is characterized in that, in the state that described gas ejector cuts out, at least 50% of the surface of contact between described two sealing surfaces (5,6) has a microstructure (7).
4. according to gas ejector in any one of the preceding claims wherein, it is characterized in that, described microstructure forms the region that the annular on described sealing surface closes.
5. according to gas ejector in any one of the preceding claims wherein, it is characterized in that, described microstructure (7) comprises the recess (70) that geometrical shape is determined.
6. according to gas ejector in any one of the preceding claims wherein, it is characterized in that, the face of the microstructure (7) on one of described sealing surface is less than the surface of contact (9) between these two sealing surfaces (5,6).
7. gas ejector according to any one of claim 1 to 5, is characterized in that, the face of the microstructure (7) on one of described sealing surface (5,6) is greater than the surface of contact (9) between these two sealing surfaces.
8. according to gas ejector in any one of the preceding claims wherein, it is characterized in that, described valve seat (4) is flat seat or cone seat.
9. according to gas ejector in any one of the preceding claims wherein, it is characterized in that, described microstructure comprises multiple groove extended circlewise on described sealing surface.
10. gas ejector according to claim 9, is characterized in that, the described groove of annular is interrupted by connecting sheet (72).
11. gas ejectors according to any one of claim 1 to 8, is characterized in that, described microstructure (7) comprises the recess of multiple ellipse or rectangle.
12. 1 kinds of internal-combustion engines, it comprises a firing chamber (10) and according to gas ejector in any one of the preceding claims wherein, wherein, described gas ejector is directly arranged on described firing chamber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014215870.2 | 2014-08-11 | ||
| DE102014215870.2A DE102014215870A1 (en) | 2014-08-11 | 2014-08-11 | Gas injector with defined microstructure on a sealing surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105370445A true CN105370445A (en) | 2016-03-02 |
| CN105370445B CN105370445B (en) | 2020-02-18 |
Family
ID=55134883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510487241.8A Active CN105370445B (en) | 2014-08-11 | 2015-08-10 | Gas injector with defined microstructure on sealing surface |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105370445B (en) |
| DE (1) | DE102014215870A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916507A (en) * | 2019-05-07 | 2020-11-10 | 朗美通日本株式会社 | Semiconductor light receiving element and method for manufacturing semiconductor light receiving element |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017202958A1 (en) * | 2017-02-23 | 2018-08-23 | Robert Bosch Gmbh | Nozzle assembly for a fuel injector, fuel injector |
| GB2613396B (en) * | 2021-12-02 | 2024-03-20 | Delphi Tech Ip Ltd | Fuel injector suitable for gaseous fuel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4519372A (en) * | 1983-08-12 | 1985-05-28 | Hoffman James E | Gas injection valve |
| DE19907355A1 (en) * | 1999-02-20 | 2000-09-07 | Bosch Gmbh Robert | Nozzle unit for dosing of fluids or gases for fuel injection systems has guide surfaces between guide bore and nozzle body located partially outside sealing seat |
| CN1443271A (en) * | 2000-07-18 | 2003-09-17 | 曼B与W狄赛尔公司 | Gas exchange valve arrangement and valve seat construction with ring-shaped groove |
| JP2010038110A (en) * | 2008-08-07 | 2010-02-18 | Keihin Corp | Injection valve for gaseous fuel |
| JP2012077906A (en) * | 2010-09-06 | 2012-04-19 | Kawasaki Heavy Ind Ltd | Valve seat body and valve device |
-
2014
- 2014-08-11 DE DE102014215870.2A patent/DE102014215870A1/en active Pending
-
2015
- 2015-08-10 CN CN201510487241.8A patent/CN105370445B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4519372A (en) * | 1983-08-12 | 1985-05-28 | Hoffman James E | Gas injection valve |
| DE19907355A1 (en) * | 1999-02-20 | 2000-09-07 | Bosch Gmbh Robert | Nozzle unit for dosing of fluids or gases for fuel injection systems has guide surfaces between guide bore and nozzle body located partially outside sealing seat |
| CN1443271A (en) * | 2000-07-18 | 2003-09-17 | 曼B与W狄赛尔公司 | Gas exchange valve arrangement and valve seat construction with ring-shaped groove |
| JP2010038110A (en) * | 2008-08-07 | 2010-02-18 | Keihin Corp | Injection valve for gaseous fuel |
| JP2012077906A (en) * | 2010-09-06 | 2012-04-19 | Kawasaki Heavy Ind Ltd | Valve seat body and valve device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916507A (en) * | 2019-05-07 | 2020-11-10 | 朗美通日本株式会社 | Semiconductor light receiving element and method for manufacturing semiconductor light receiving element |
| CN111916507B (en) * | 2019-05-07 | 2024-05-17 | 朗美通日本株式会社 | Semiconductor light receiving element and method for manufacturing semiconductor light receiving element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105370445B (en) | 2020-02-18 |
| DE102014215870A1 (en) | 2016-02-11 |
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