EP1502022A1 - Kraftstoffverteilungsrohr für kraftfahrzeug-einspritzeinrichtungen, insbesondere für common-rail-systeme - Google Patents
Kraftstoffverteilungsrohr für kraftfahrzeug-einspritzeinrichtungen, insbesondere für common-rail-systemeInfo
- Publication number
- EP1502022A1 EP1502022A1 EP03729864A EP03729864A EP1502022A1 EP 1502022 A1 EP1502022 A1 EP 1502022A1 EP 03729864 A EP03729864 A EP 03729864A EP 03729864 A EP03729864 A EP 03729864A EP 1502022 A1 EP1502022 A1 EP 1502022A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing body
- fuel distribution
- distribution pipe
- transmission element
- force transmission
- 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
- 239000000446 fuel Substances 0.000 title claims description 31
- 238000009826 distribution Methods 0.000 title claims description 25
- 238000002347 injection Methods 0.000 title claims description 5
- 239000007924 injection Substances 0.000 title claims description 5
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000004323 axial length Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
Definitions
- Fuel distribution pipe for motor vehicle injection devices in particular for coinmon rail systems
- the invention relates to a fuel distribution pipe for motor vehicle injection devices, in particular for common rail systems, which consists of a drawn, rolled or forged pipe, the interior of which forms a high-pressure accumulator for holding fuel, to which pressure lines are connected, each via a transverse bore in the tube open into the interior, and which has an end closure with a sealing body on at least one end face, the sealing body being pressed in a sealing manner by a force-transmitting element with a thread on an adapted contact surface of the tube.
- Such a fuel distribution pipe is already known from EP 0 866 221 AI.
- One end of the known distributor pipe - the other end usually serves to connect to a high-pressure pump - is closed by a sealing body which is particularly spherical or spherical in shape to the interior and which is pressed sealingly against a contact surface in the fuel distribution pipe by an axially arranged threaded plug.
- the fuel distribution pipe is conventionally made from a forgings to which connection connections for the attachment of pressure lines are formed.
- the distribution paths are created by means of holes, ie a longitudinal hole is made into which cross holes lead through the connection connections.
- a longitudinal hole is made into which cross holes lead through the connection connections.
- the object of the present invention is to further develop the fuel distribution pipe mentioned at the outset in such a way that optimization of the tension conditions at the intersection edges is made possible.
- the problematic stresses at the intersection edges associated with the structural conditions should be able to be reduced even with a given installation space.
- the invention is based on the consideration that further stresses can be superimposed on the mechanical stresses resulting from the internal pressure.
- these are tensions that result from the sealing force at the connection connection of a pressure line
- tensions that come from the sealing force at the end closure are small in terms of amount and can be kept low by a sufficiently large distance between the contact surface there and the intersection edge.
- this voltage component is currently not limiting.
- the voltage component resulting from the end closure has proven to be significant. In principle, it could be reduced by reducing the sealing force, which is practically not possible for safety reasons. Increasing the distance between the sealing surface and the closest cutting edge seems to be a better alternative. Given the specified connection position for the pressure line, however, this would inevitably lead to an extension of the fuel distribution pipe.
- the sealing body and the force transmission element are therefore not arranged axially in the row, but rather at least partially in parallel, in order to save axial installation space.
- a preferred, easy to manufacture and assemble embodiment can be achieved in that the force transmission element is designed as a threaded cap and is screwed onto an external pipe thread or screwed into an internal pipe thread, and that the cap base of the threaded cap is on the side of the pipe facing away from the contact surface Sealing body rests.
- FIG. 1 shows a fuel distribution pipe according to the prior art in a sectional side view
- FIG. 2 in the same representation, a fuel distribution pipe according to the invention
- FIG. 1 shows a section of a known fuel distribution pipe, which essentially corresponds to the embodiment according to FIG. 10 in the above-mentioned EP 0 866 221 A1.
- the fuel distributor consists of a drawn or rolled tube 1.
- the interior (the "longitudinal bore") of the tube 1 forms a high-pressure accumulator 2, into which cross bores 3 open, each of which is connected to a pressure line 4.
- the pressure lines 4 are each connected to the pipe 1 with a connection 5.
- the diameter of the transverse bore 3 corresponds approximately to the inside diameter of the pressure line 4, so that it practically opens directly into the high-pressure accumulator 2.
- Each pressure line 4 therefore has a transverse bore 3 running radially in the tube 1 Bore intersection between the longitudinal bore and the transverse bore 3, an intersection edge 6 is formed.
- an end closure On the right end face of the tube 1, which can be seen in FIG. 1, this is provided with an end closure.
- This consists essentially of a spherical sealing body 7, which bears sealingly on a correspondingly adapted contact surface 8 in the interior of the tube 1. It is necessary to fix the sealing body 7 on the contact surface 8 by means of a grub screw 9 in such a way that a tight seal 16 of the high-pressure accumulator 2 is ensured even taking into account the high pressures prevailing therein.
- the tight closure 16 can, as indicated in FIG. 1, be supported by a slight adjustment of the sealing body 7 and the threaded pin 9 in the sense of tolerance compensation.
- the set screw 9 can be screwed in with the aid of an insertion opening 17 provided for a screwing tool.
- connection 5 and thus also the intersection edge 6, which is closest to the contact surface 8. Due to the arrangement of the grub screw 9 and the sealing body 7 axially one behind the other, the contact surface 8 is arranged relatively far inside the tube and thus also in relative proximity to the intersection edge 6, which is therefore to a large extent exposed to the adverse effects of the sealing force start from the contact surface 8.
- FIG. 2 shows a fuel distribution pipe according to the invention, in which the end closure of the pipe 1 is ensured by a sealing body 7, which is fixed by a threaded cap 10.
- the threaded cap 10 has an internal thread on its wings, more precisely: on the inside of its cylindrical part, while the tube 1 has a corresponding external thread 11.
- the sealing body 7 lies directly against the cap base 12 of the threaded cap 10, possibly with tolerance compensation.
- the wings of the threaded cap 10 extend outside the tube 1, as can be seen, over a substantial part of the axial extent of the sealing body 7.
- the material and the thickness of the cap base 12 can be selected depending on the specific circumstances.
- Axial installation space can be saved by the partially parallel arrangement of sealing body 7 and force transmission element 10 in FIG.
- the length difference between the thickness of the cap base 12 and the length of the previous threaded pin 9 according to FIG. 1 corresponds to the saving in axial length or the potential for increasing the distance between the contact surface 8 and the intersection edge 6.
- a reduction in tension at the intersection edge 6 is same axial overall length of the fuel distribution pipe possible; on the other hand, an absolute reduction in the axial length can be achieved with the same voltages.
- the cap base 12 can be integrally connected to the side of the sealing body 7 facing away from the contact surface 8.
- the sealing body 7 can not only be designed, as shown in the figures, as a sealing ball that can be produced with little effort, but also, for example, with a first end face that is spherical or spherical in shape to the interior and with a second end face that is flat towards the force transmission element 10.
- a cold-worked power transmission element that can be produced with little effort can advantageously be used.
- the force transmission element can be designed as a threaded plug 13 with a recess 14 on the sealing body side. formed and screwed into a pipe internal thread 15.
- the sealing body 7 is accommodated in a space-saving manner with part of its axial length in the recess 14, so the dense height is literally enclosed by the threaded plug 13 in this case.
- the embodiment according to FIG. 3B, in which the threaded cap 18 is screwed into an internal pipe thread differs from the embodiment according to FIG. 3A above all in terms of geometry (larger radius).
- FIGS. 2, 3A and 3B are the openings or surfaces necessary for the introduction of force when screwing in the force transmission element 10, 13, and 18.
- outer key surfaces or a rear insertion opening similar to that in FIG. 1, can be provided.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10220339A DE10220339A1 (de) | 2002-05-07 | 2002-05-07 | Kraftstoffverteilungsrohr für Kraftfahrzeug-Einspritzeinrichtungen, insbesondere für Common-Rail-Systeme |
| DE10220339 | 2002-05-07 | ||
| PCT/DE2003/001431 WO2003095826A1 (de) | 2002-05-07 | 2003-05-05 | Kraftstoffverteilungsrohr für kraftfahrzeug-einspritzeinrichtungen, insbesondere für common-rail-systeme |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1502022A1 true EP1502022A1 (de) | 2005-02-02 |
| EP1502022B1 EP1502022B1 (de) | 2006-07-19 |
Family
ID=29285166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03729864A Expired - Lifetime EP1502022B1 (de) | 2002-05-07 | 2003-05-05 | Kraftstoffverteilungsrohr für kraftfahrzeug-einspritzeinrichtungen, insbesondere für common-rail-systeme |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7004145B2 (de) |
| EP (1) | EP1502022B1 (de) |
| JP (1) | JP4008920B2 (de) |
| DE (2) | DE10220339A1 (de) |
| WO (1) | WO2003095826A1 (de) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1752655B1 (de) * | 2005-07-08 | 2007-09-05 | C.R.F. Società Consortile per Azioni | Anordnung zur Verbindung eines Kraftstoffspeichers für Kraftstoff unter Druck und mindestens einem Injektor, für eine Brennkraftmaschine |
| DE102008017151B3 (de) * | 2008-04-03 | 2009-08-27 | Continental Automotive Gmbh | Kraftstoff-Einspritzsystem für eine Brennkraftmaschine |
| AT509177B1 (de) * | 2009-11-23 | 2013-09-15 | Bosch Gmbh Robert | Druckrohrstutzen für common-rail-einspritzsystem |
| JP2012112355A (ja) * | 2010-11-26 | 2012-06-14 | Otics Corp | デリバリパイプ |
| US20130001891A1 (en) * | 2011-06-29 | 2013-01-03 | Caterpillar Inc. | Sealing assembly |
| JP2014009680A (ja) * | 2012-07-03 | 2014-01-20 | Aisan Ind Co Ltd | 燃料デリバリパイプ |
| JP2015025436A (ja) * | 2013-07-29 | 2015-02-05 | 株式会社デンソー | 蓄圧容器 |
| DE102015205980A1 (de) * | 2015-04-02 | 2016-10-06 | Robert Bosch Gmbh | Brennstoffeinspritzanlage und hydraulische Anbindung an einer Brennstoffeinspritzanlage |
| US9574534B2 (en) * | 2015-05-19 | 2017-02-21 | Millennium Industries Corporation | Reinforced end cap assembly for pressure vessel |
| JP6793661B2 (ja) * | 2015-11-30 | 2020-12-02 | 日立オートモティブシステムズ株式会社 | インジェクタ、燃料レール及び燃料レールアッセンブリ |
| KR102466840B1 (ko) * | 2016-04-08 | 2022-11-15 | 에이치엘만도 주식회사 | 밸브 블록 |
| DE102016006411B4 (de) * | 2016-05-31 | 2018-03-29 | Henzel Automotive GmbH | Anschlussstutzen zum Anschluss einer Kraftstoffleitung an eine Kraftstoffhochdruckpumpe |
| CN111520266A (zh) * | 2020-03-17 | 2020-08-11 | 成都威特电喷有限责任公司 | 一种轻量化的高压油轨 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3598434A (en) * | 1970-06-08 | 1971-08-10 | Columbus Autom Parts Co | Ball joint having disposable retainer |
| JPH09317599A (ja) | 1996-05-22 | 1997-12-09 | Usui Internatl Ind Co Ltd | コモンレールおよびその製造方法 |
| DE19744762A1 (de) | 1997-03-18 | 1998-10-01 | Poppe & Potthoff Gmbh & Co | Einspritzeinrichtung für einen Dieselmotor |
| DE19747736C1 (de) * | 1997-10-29 | 1999-04-08 | Siemens Ag | Druckspeicher für Kraftstoffversorgungssysteme |
| DE10143511B4 (de) * | 2001-09-05 | 2006-11-09 | Siemens Ag | Speichereinspritzsystem mit Drosseleinrichtung |
| EP1298314B1 (de) * | 2001-09-28 | 2008-11-26 | Continental Automotive GmbH | Kraftstoffspeicher für eine Einspritzvorrichtung |
-
2002
- 2002-05-07 DE DE10220339A patent/DE10220339A1/de not_active Ceased
-
2003
- 2003-05-05 WO PCT/DE2003/001431 patent/WO2003095826A1/de not_active Ceased
- 2003-05-05 EP EP03729864A patent/EP1502022B1/de not_active Expired - Lifetime
- 2003-05-05 DE DE50304287T patent/DE50304287D1/de not_active Expired - Fee Related
- 2003-05-05 JP JP2004503794A patent/JP4008920B2/ja not_active Expired - Fee Related
-
2004
- 2004-09-21 US US10/945,726 patent/US7004145B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03095826A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US7004145B2 (en) | 2006-02-28 |
| DE10220339A1 (de) | 2003-11-27 |
| JP2005530080A (ja) | 2005-10-06 |
| EP1502022B1 (de) | 2006-07-19 |
| JP4008920B2 (ja) | 2007-11-14 |
| WO2003095826A1 (de) | 2003-11-20 |
| US20050045152A1 (en) | 2005-03-03 |
| DE50304287D1 (de) | 2006-08-31 |
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