CN101283179B - Injector having a seal and supporting ring - Google Patents
Injector having a seal and supporting ring Download PDFInfo
- Publication number
- CN101283179B CN101283179B CN2006800376511A CN200680037651A CN101283179B CN 101283179 B CN101283179 B CN 101283179B CN 2006800376511 A CN2006800376511 A CN 2006800376511A CN 200680037651 A CN200680037651 A CN 200680037651A CN 101283179 B CN101283179 B CN 101283179B
- Authority
- CN
- China
- Prior art keywords
- sparger
- support ring
- ring
- seal
- described sparger
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 239000000446 fuel Substances 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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- 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
- F02M61/167—Means for compensating clearance or thermal expansion
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
-
- 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
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/003—Valve inserts containing control chamber and valve piston
-
- 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
- F02M61/166—Selection of particular materials
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to an injector, in particular for injecting fuel into a combustion chamber of an internal combustion engine, having a valve element which can be displaced longitudinally in a valve housing and an annular pressure chamber which is formed between the valve housing and the valve element and has a sealing element which is arranged therein between the valve housing and the valve element, wherein the sealing element has a sealing ring and an associated supporting ring (30), and the sealing ring has a radially inwardly lying sealing face and a radially outwardly lying sealing face, characterized in that the supporting ring (30) has at least one opening (31) which is spaced apart from a radially inner and a radially outer edge region (30A, 30B) of the supporting ring (30) (figure 5a).
Description
Technical field
The present invention relates to a kind of sparger, be particularly useful for injecting fuel in the firing chamber of internal-combustion engine.
Background technique
This sparger is for example open by DE 102 20 457 A1.Wherein disclosed sparger has a pressure chamber, and it seals by seal element between a high-pressure area and an area of low pressure.At this, between seal element is accommodated at the bottom of two annular wall of pressure chamber and the pressure chamber and constitute circlewise.The sealing component construction becomes metallic packing ring solid, one, and it is received on the inner annular wall by press fit.
Disclose a kind of sparger by DE 10 2,004 015 133 A1 in addition, it has a seal element, and it is configured to have the seal ring of support ring.This not the shear-stable seal ring make with the mixture of polytetrafluoroethylene (PTFE) and copper powder, make and must avoid extruding by support ring.Support ring also will stop generation high pressure foundation between seal ring and the support ring, so that avoid seal ring vertically to vacillate.For this reason, support ring has sickle-shaped opening and spron on the edge.
But thus may be in service owing to the support ring plastic deformation takes place high voltage load at sparger, make that the water cross section of opening is uncertain, deviation is very high.
Summary of the invention
The present invention proposes a kind of sparger that is particularly useful for injecting fuel in the combustion chambers of internal combustion engines, have a valve element that in valve chest, can vertically move and an annular pressure chamber that between valve chest and valve element, constitutes, this pressure chamber has the seal element that is placed between valve chest and the valve element in pressure chamber, wherein, support ring and seal ring that seal element has a seal ring and a corresponding configuration have a sealing surface and a sealing surface that is in radially outer that is in inner radial, wherein, according to the present invention, support ring has at least one hole, the fringe region partition distance inner radial of this hole and support ring and radially outer.
The advantage that sparger according to the present invention has is, the leakage cross section of determining by described at least one hole under the seal element structure situation of being advised is clearly determined and can not changed owing to the distortion of support ring and become uncertain.Thus, effectively the deviation of hole cross section is also determined, thereby can be easier to control.
Also reduced the danger of extruding of seal element by definite structure of the hole cross section in the support ring.
In addition, reduced microscopic motion between the sparger different elements to the influence of leakage area, because leakage area is in the inner region of support ring diametrically, not on its fringe region.
Particularly advantageously in addition be, described at least one hole is placed in the radially central region of support ring because like this this hole and the sealing surface around its be located in original, act on the pressure line on the seal ring.Thus, lateral extrusion pressure almost is eliminated for the meaning of seal action.Have the radial shape deviation or have under the situation of small damage at seal ring, enter fuel in the radial clearance and shear load in the seal ring material is raise and improve thus and extrude danger.
Other advantage of object of the present invention and favourable scheme can be learnt from specification, accompanying drawing and claim.
Description of drawings
Simplified schematic illustrates the mode of action of the preferred embodiment and the seal element of fuel high pressure device constructed according to the invention in the accompanying drawing, explains in detail in the following description.Shown in the accompanying drawing:
Fig. 1 is according to a schematic representation with sparger of seal element of the present invention;
The enlarged view of the regional X of Fig. 2 Fig. 1;
Fig. 3 does not have the action principle according to the seal element in hole of the present invention;
Fig. 4 does not have further illustrating according to the action principle of the seal element in hole of the present invention;
Fig. 5 a illustrates the plan view of the support ring of seal element separately, has the boring that selecting type is settled;
The cross section of the support ring of Fig. 5 b Fig. 5 a;
The view that the support ring of Fig. 5 c Fig. 5 a and 5b is seen from below; With
The cross section of the amplification of the support ring of Fig. 5 d Fig. 5 b.
Embodiment
Fig. 1 and Fig. 2 respectively illustrate a part that is used for injecting fuel into the sparger 1 of combustion chambers of internal combustion engines, and this sparger especially is used in the common rail structural formula fuel injection apparatus of vehicle.
Inside at the housing 2 of sparger 1 constitutes a pressure chamber 3, and this pressure chamber is settled around the valve element 4 that is configured to inserting member circlewise.Pressure chamber 3 is by two ring wall 3A that spacing is radially arranged, and 8 constitute at the bottom of 3B and the pressure chamber.At this, the ring wall 3A that is in inner radial is made of valve element 4, and the ring wall 3B that is in radially outer is made of housing 2.Pressure chamber 3 is by high pressure entry 6 through-flow are connected of a boring 5 with a high-voltage power supply.
On the circumference of valve element 4, on its combustion chamber side end, settle an annular sealing 7 in pressure chamber 3 inside, the sealing element is forced into pressure chamber by the high pressure that exists in pressure chamber 3 at the bottom of on 8 and be pressed towards the sidewall 3A radially of pressure chamber 3,3B.
The mode of action organization plan of other element of sparger 1 can be a traditional type, with in DE102 20 457 A1 and DE 196 19 523 A1, describe the same, their content obviously belongs to the disclosure of present specification.
For the advantage of the configuration of the present invention of illustrating seal element 7, Fig. 3 and 4 seal elements 10 by the known structure type illustrate the seal element mode of action.
The seal action of seal ring 11 realizes to the radial wall of valve element 4 and pressure chamber 3 that by the sealing material lateral extrusion wherein, squeeze pressure all the time must be the same with high pressure at least big, enters into sealing area to prevent pressure medium.
On the radially outer fringe region 13 of support ring 12, have sickle-shaped die-cut mouthful of (not shown) according to the seal ring 11 of Fig. 3 and 4, to avoid seal ring 11 since the double seal of seal ring 11 and support ring 12 and the pressure between them set up and vertically vacillate.This sickle-shaped leakage position has been set up when pressure medium enters in the gap 20 between the radial outer wall 3B of seal ring 11 and pressure chamber 3 as shown in Figure 4 in the gap to refluxing or the possibility of area of low pressure current drainage.
In Fig. 3 and 4 with the arrow mark pressure load and the shear load on the seal ring 11.
In Fig. 3, the axial original high voltage load of arrow 50 expressions, it acts on the seal ring based on high pressure.Produce the lateral extrusion pressure 51 of a secondary thus, it is pressed onto the anchor ring 3A that is radially spaced of pressure chamber 3 with seal ring 11, on the 3B.From axial back pressure 52 of following effect, it is delivered on the seal ring 11 by support ring 12.
Can see that in Fig. 4 pressure medium, for example fuel under high pressure enter and how to take place in the seal clearance 20 and cause seal ring 11 distortion.In seal ring 11, produce a zone 53 thus with the shear load that increases.
Fig. 5 a, 5b and 5c illustrate the support ring 30 of seal element 7 of the sparger 1 of Fig. 1 and 2 with plan view, the section seen from above and the plan view of seeing from below.This support ring 30 can be combined with the seal ring according to Fig. 3, has a plurality of axially extended holes 31, and they are distributed on the circumference of support ring 30.These holes 31 can be evenly distributed on the circumference of support ring, for example with 90 ° of angles, but also can distribute unevenly according to the applicable cases difference.
All grooves 32 have the connection strap 55 of external radial seal, so that reliably avoid the leakage flow between anchor ring 3B and the outward edge 30B.
Shown in the structure, four grooves 32 are equably, promptly be distributed on the circumference of support ring 30 with 90 ° mutual angle.But according to the applicable cases difference, the quantity of groove 32 and their distributions on support ring 30 circumference also can change.
According to Fig. 5 a and 5c, hole 31 can be arranged with angular misalignment α arbitrarily with respect to a groove 32.Shown in the layout with 0 ° of angular misalignment in, this hole 31 preferably is placed in the zone of groove 32.
These holes 31 can be configured to circular hole, as boring.Under the situation of about 8mm of the internal diameter of support ring 30 and the about 10mm of external diameter, they preferably have the bore dia of about 0.1mm.
The hole cross section can change aspect shape, position attitude and the geometrical construction according to the functional requirement difference.
According to the present invention, these holes are arranged to such an extent that leave with the radially inward edge 30A and the radially outward edge 30B of support ring 30, preferably anchor ring in the radial direction at the middle part of support ring, this anchor ring carries out the transition in the ring connection strap 56 of axial orientation on the edge within it.
Defined structure by hole 31, thereby prevented by seal ring and support ring double seal especially effectively and prevented that seal ring from vertically vacillating, wherein, at this, it is favourable that Leak hole is arranged in the center region of support ring, that is, the possible distortion of support ring 30 can not exert an influence to the size of Leak hole.Seal element 7 obviously becomes more insensitive to deviation thus.
Claims (12)
1. sparger (1), pressure chamber (3) with a valve element (4) that in valve chest (2), can vertically move and an annular that between valve chest (2) and valve element (4), constitutes, this pressure chamber has the seal element (7) that is placed in therein between valve chest (2) and the valve element (4), wherein, sealing element (7) has the support ring (30) of a seal ring and a corresponding configuration, the sealing ring has the sealing surface and the sealing surface that is in radially outer that are in inner radial, it is characterized in that, this support ring (30) has at least one hole (31), (30A 30B) separates spacing to inner radial and fringe region radially outer of described hole and this support ring (30).
2. according to the described sparger of claim 1, it is characterized in that this support ring (30) also has at least one groove (32), described groove constitutes one at inside in the radial direction leakage paths.
3. according to the described sparger of claim 2, it is characterized in that each groove (32) outwards has a connection strap (55).
4. according to the described sparger of one of claim 1 to 3, it is characterized in that a plurality of holes (31) are arranged to such an extent that be distributed on the circumference of support ring (30).
5. according to the described sparger of claim 4, it is characterized in that these holes (31) are evenly distributed on this circumference.
6. according to the described sparger of claim 2, it is characterized in that described at least one hole (31) is arranged with an angle with respect to the groove position (α) about described at least one groove (32).
7. according to the described sparger of claim 6, it is characterized in that each hole (31) are arranged in the middle part with respect to groove with 0 ° of angular orientation.
8. according to the described sparger of claim 4, it is characterized in that these holes (31) are the axial bores of circular.
9. according to the described sparger of one of claim 1 to 3, it is characterized in that these holes (31) have the diameter of approximate 0.1mm.
10. according to the described sparger of one of claim 1 to 3, it is characterized in that the hole cross section can change aspect shape, position attitude and the geometrical construction.
11., it is characterized in that described sparger (1) is used for injecting fuel into combustion chambers of internal combustion engines according to the described sparger of claim 1.
12., it is characterized in that the axial bore of described circular is boring or die-cut mouth according to the described sparger of claim 8.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200510048541 DE102005048541A1 (en) | 2005-10-11 | 2005-10-11 | injector |
| DE102005048541.3 | 2005-10-11 | ||
| PCT/EP2006/066588 WO2007042382A1 (en) | 2005-10-11 | 2006-09-21 | Injector having a seal and supporting ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101283179A CN101283179A (en) | 2008-10-08 |
| CN101283179B true CN101283179B (en) | 2011-04-13 |
Family
ID=37402265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800376511A Active CN101283179B (en) | 2005-10-11 | 2006-09-21 | Injector having a seal and supporting ring |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1941152B1 (en) |
| JP (1) | JP2009511838A (en) |
| CN (1) | CN101283179B (en) |
| DE (2) | DE102005048541A1 (en) |
| WO (1) | WO2007042382A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102282358B (en) * | 2009-01-16 | 2015-12-02 | 伊利诺斯工具制品有限公司 | For the two-phase spring assembly of fuel injection system |
| TR201108147A2 (en) * | 2011-08-16 | 2013-01-21 | Robert Bosch Gmbh | An injection valve with effective sealing. |
| CN103899462B (en) * | 2012-12-31 | 2016-05-25 | 北京亚新科天纬油泵油嘴股份有限公司 | Hermetically-sealed construction in a kind of fuel feed system injector |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4027499A1 (en) * | 1990-08-30 | 1992-03-05 | Bayerische Motoren Werke Ag | Sealing ring for rubbery material - consists of disc-shaped plastics rigid or hard support section, with softer material on outside |
| GB2271793A (en) * | 1992-10-26 | 1994-04-27 | Fmc Corp | Seal anti-extrusion device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60134869U (en) * | 1984-02-20 | 1985-09-07 | マツダ株式会社 | Fuel return structure of fuel injection nozzle |
| DE10020870A1 (en) * | 2000-04-28 | 2001-10-31 | Bosch Gmbh Robert | Common rail injector |
| JP3567374B2 (en) * | 2001-07-16 | 2004-09-22 | 株式会社ボッシュオートモーティブシステム | Fuel injection valve seal structure |
| DE102004015133A1 (en) * | 2003-11-03 | 2005-06-02 | Robert Bosch Gmbh | injector |
-
2005
- 2005-10-11 DE DE200510048541 patent/DE102005048541A1/en not_active Withdrawn
-
2006
- 2006-09-21 EP EP06793710A patent/EP1941152B1/en active Active
- 2006-09-21 DE DE502006006659T patent/DE502006006659D1/en active Active
- 2006-09-21 JP JP2008534970A patent/JP2009511838A/en active Pending
- 2006-09-21 WO PCT/EP2006/066588 patent/WO2007042382A1/en active Application Filing
- 2006-09-21 CN CN2006800376511A patent/CN101283179B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4027499A1 (en) * | 1990-08-30 | 1992-03-05 | Bayerische Motoren Werke Ag | Sealing ring for rubbery material - consists of disc-shaped plastics rigid or hard support section, with softer material on outside |
| GB2271793A (en) * | 1992-10-26 | 1994-04-27 | Fmc Corp | Seal anti-extrusion device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1941152A1 (en) | 2008-07-09 |
| CN101283179A (en) | 2008-10-08 |
| JP2009511838A (en) | 2009-03-19 |
| EP1941152B1 (en) | 2010-04-07 |
| DE502006006659D1 (en) | 2010-05-20 |
| WO2007042382A1 (en) | 2007-04-19 |
| DE102005048541A1 (en) | 2007-04-12 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |