WO2017089013A1 - Dichtelement und kraftstoffinjektor mit einem dichtelement - Google Patents
Dichtelement und kraftstoffinjektor mit einem dichtelement Download PDFInfo
- Publication number
- WO2017089013A1 WO2017089013A1 PCT/EP2016/073323 EP2016073323W WO2017089013A1 WO 2017089013 A1 WO2017089013 A1 WO 2017089013A1 EP 2016073323 W EP2016073323 W EP 2016073323W WO 2017089013 A1 WO2017089013 A1 WO 2017089013A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sealing element
- sealing
- fuel injector
- components
- regions
- Prior art date
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
- 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
- F02M55/008—Arrangement of fuel passages inside of injectors
-
- 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
- F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
-
- 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
Definitions
- the invention relates to a sealing element for a high-pressure connection in a fuel injector according to the preamble of claim 1. Furthermore, the sealing element for a high-pressure connection in a fuel injector according to the preamble of claim 1. Furthermore, the sealing element for a high-pressure connection in a fuel injector according to the preamble of claim 1. Furthermore, the sealing element for a high-pressure connection in a fuel injector according to the preamble of claim 1. Furthermore, the
- a sealing element according to the preamble of claim 1 is known from DE 10 2012 222 167 A1 of the applicant.
- the known sealing element can be a high-pressure line to seal a connection in a fuel injector.
- the high-pressure line and the connecting piece are clamped together axially by means of a union nut, wherein the sealing element is disposed within bores of the two axially spaced apart components (high pressure line and connecting piece).
- the sealing element deforms radially outward and rests with an outer side or an outer periphery to form a seal at the mouth areas of the two through holes of the two components. It is essential that the sealing element in a respect to a longitudinal axis of the
- Sealing element axially central region a radially outwardly projecting
- Sealing element has an outer diameter which is larger than that
- the invention has the object, a sealing element for a high pressure connection in a fuel injector according to the preamble of claim 1 such that this allows a particularly compact arrangement of the components in the installed state in the axial direction. In addition, a particularly good sealing effect should be achieved.
- the invention is based on the idea that, by forming at least two axially spaced first sealing areas with respect to a longitudinal axis of the sealing element, the at least two first sealing areas can be assigned to the bores of the two components forming the high-pressure connection, such that the
- Sealing areas cooperate with an inner wall of the bore of the respective component. This makes it possible for those against each other
- Seal element can be arranged with their facing end faces directly in abutting contact. This in turn has the advantage of a particularly compact arrangement of the sealing element within the
- the sealing element is elastically deformable and made of metal, in particular of a steel material.
- sealing element has this in the axial cross-section on a waveform.
- the sealing element can be produced inexpensively and with high precision in a chipless forming process.
- the invention also includes a fuel injector with a so far
- Recess is arranged, wherein the recess, for example, by two radially encircling, having a same radius bores or
- Inner walls of the components is formed, and wherein the two components to form a perpendicular to a longitudinal axis of the sealing element
- the fuel injector is characterized in that under
- the sealing element in the unassembled state with respect to its longitudinal axis has a length which is greater than the height of the recess in the assembled state of the two components.
- Shortening of the sealing element causes such that the sealing element with his two opposite end faces sealingly in the region of the recess.
- Sealing surfaces formed between the two components and the sealing element This causes a particularly safe or improved sealing effect.
- a further preferred embodiment of the invention provides that, viewed in the axial direction of the longitudinal axis of the sealing element, radially outwardly projecting sections adjoin the two axial end regions of the sealing element in the direction of the sealing element and form the first sealing regions.
- Such a design of the sealing element causes the sealing element is mechanically expanded radially by the mounting force during axial clamping of the two components even without hydraulic pressure, such that the two first sealing regions bear against the inner wall of the two components.
- a reliable sealing of the high-pressure connection is ensured during operation even at a relatively low hydraulic pressure.
- An additional seal is inventively achieved in an advantageous manner in that the two interconnected components are arranged at least partially in abutting contact in the region of the parting plane of the two components. This not only limits the axial Verspannweg the two components during their installation, but achieved by the contact between the two components an additional sealing effect.
- Sealing element is arranged between a holding body and a nozzle body, or to applications in which the sealing element between a valve piece and a holding body is arranged.
- Fig. 1 shows a portion of a fuel injector in the connection area
- FIG. 2 shows a detail of FIG. 1 in an enlarged view
- Fig. 3 shows a portion of a fuel injector in the connection area
- Fig. 4 shows a detail of Fig. 3 in an enlarged view.
- a fuel injector 10 is shown in some areas, as he zürn injecting fuel into a combustion chamber, not shown
- Fuel injector 10 designed as a so-called common rail injector.
- the fuel injector 10 has a nozzle body 11, to which a retaining body 12 adjoins the injection openings, not shown, of the nozzle body 11.
- the nozzle body 1 1 is connected to the
- Holding body 12 axially clamped by means of a nozzle lock nut 15.
- nozzle needle 20 can be the
- the fuel injector 10 has a high pressure connection 25, in which a recognizable in Figs. 1 and 2 sleeve-shaped sealing element 26 is arranged.
- the sealing element 26 is preferably made of steel and is wave-shaped in the axial cross-section.
- the sealing element 26 has on its outer wall 28 two axially spaced first sealing regions 31, 32. Between the two first sealing areas 31, 32, a recess 33 is formed, in the area of which also the two
- End faces 16, 17 of the nozzle body 1 1 and the holding body 12 and the separating plane extend.
- the recess 19 is formed by a respective bore portion 34, 35 of the recess 19 in the nozzle body 1 1 and the holding body 12, which extends from the respective end face 16, 17.
- Recess 19 is the same size at least in the region of the sealing element 26.
- Sealing areas 31, 32 has an outer diameter d, which is slightly smaller than the diameter D of the recess 19. This allows the
- Sealing element 26 sealingly on the base 38, 39 of the respective bore section 34, 35 abut and thereby form second sealing regions 41, 42. Furthermore, it can be seen from FIG. 2 that, due to the wave shape of the sealing element 26, portions 43, 44 of the sealing element 26 emanate from the two axial end regions 36, 37 in the direction of the end faces 16, 17, which in relation to the longitudinal axis 27 of the sealing element 26 protrude radially outward or are arranged obliquely. The sections 43, 44 end in the area of the first
- Sealing areas 31, 32 are pressed radially outward against the recess 19 by the geometric configuration of the sections 43, 44.
- the sealing element 26 is additionally radially expanded by the hydraulic pressure in the recess 19, such that the two first sealing portions 31, 32 against the corresponding
- Sections of the bore 34, 35 are pressed. As a result, at least in the region of the two regions 31, 32, a leakage of fuel in the direction of the two end faces 16, 17 is avoided. In addition, an additional seal is created by the two second areas 41, 42, as well as by the contact area 18 between the nozzle body 1 1 and the
- the sealing element 26a is arranged between the holding body 12 and a valve piece 45 in the area of the high-pressure connection 25. Between the holding body 12 and the valve piece
- outside wall portion 46 of the valve member 45 is disposed and forms there a hydraulic seal.
- the radially inner first sealing region 48 is arranged in relation to the longitudinal axis 27 of the sealing element 26a between the two radially outer sealing regions 31, 32.
- the holding body 12 in the region of an end face 49 in abutting contact with an end face 50 of the
- Valve piece 45 is arranged. Also in the embodiment illustrated in FIGS. 3 and 4, the two axial end portions 36, 37 of the sealing element 26 a form second sealing surfaces 41, 42, which bear sealingly on the valve piece 45 or the holding body 12.
- the fuel injector 10, 10a described so far can be modified or modified in many ways without departing from the spirit of the invention.
- the sealing element 26, 26a with respect to its longitudinal axis 27 not only with two first sealing portions 31, 32 at the sealing element 26 and with three first sealing portions 31, 32, 48 at
- Fuel injector 10a equip, but it can also be provided additional sealing areas, which are provided on the outer wall or the inner wall of the sealing element 26, 26a.
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
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16777656.6A EP3380716B1 (de) | 2015-11-26 | 2016-09-29 | Kraftstoffinjektor mit einem dichtelement |
CN201680080142.0A CN108495994B (zh) | 2015-11-26 | 2016-09-29 | 密封元件和具有密封元件的燃料喷射器 |
KR1020187017458A KR20180085765A (ko) | 2015-11-26 | 2016-09-29 | 밀봉 요소, 그리고 밀봉 요소를 포함하는 연료 인젝터 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015223440.1 | 2015-11-26 | ||
DE102015223440.1A DE102015223440A1 (de) | 2015-11-26 | 2015-11-26 | Dichtelement und Kraftstoffinjektor mit einem Dichtelement |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017089013A1 true WO2017089013A1 (de) | 2017-06-01 |
Family
ID=57083293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2016/073323 WO2017089013A1 (de) | 2015-11-26 | 2016-09-29 | Dichtelement und kraftstoffinjektor mit einem dichtelement |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3380716B1 (de) |
KR (1) | KR20180085765A (de) |
CN (1) | CN108495994B (de) |
DE (1) | DE102015223440A1 (de) |
WO (1) | WO2017089013A1 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006048727A1 (de) * | 2006-10-16 | 2008-04-17 | Robert Bosch Gmbh | Kraftstoffinjektor mit Magnetventil |
WO2013083522A1 (de) * | 2011-12-08 | 2013-06-13 | Robert Bosch Gmbh | Einspritzventil, insbesondere für eine brennkraftmaschine |
DE102012204310A1 (de) * | 2012-03-19 | 2013-09-19 | Robert Bosch Gmbh | Dicht umspritztes Bauelement und Verfahren zum Herstellen eines solchen Bauelements |
EP2700806A1 (de) * | 2012-08-23 | 2014-02-26 | Continental Automotive GmbH | Brennstoffeinspritzdüse, Brennstoffeinspritzanordnung und Verwendung eines Dichtungsrings |
DE102012222167A1 (de) | 2012-12-04 | 2014-06-05 | Robert Bosch Gmbh | Alternativer Hochdruckanschluss mit Feder-Dichtlinse |
DE102014201854A1 (de) | 2014-02-03 | 2015-08-06 | Robert Bosch Gmbh | Dichtscheibe für einen Kraftstoffinjektor, sowie Kraftstoffinjektor mit einer derartigen Dichtscheibe |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3919231C2 (de) * | 1989-06-13 | 1997-03-06 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen |
DE10149514A1 (de) * | 2001-10-08 | 2003-04-24 | Bosch Gmbh Robert | Kraftstoffinjektor mit Kompensationselement für Kraftstoffeinspritzsysteme |
CN203670023U (zh) * | 2013-11-01 | 2014-06-25 | 上海汽车集团股份有限公司 | 用于喷油器的密封件、喷油器和柴油机 |
-
2015
- 2015-11-26 DE DE102015223440.1A patent/DE102015223440A1/de not_active Withdrawn
-
2016
- 2016-09-29 WO PCT/EP2016/073323 patent/WO2017089013A1/de active Application Filing
- 2016-09-29 CN CN201680080142.0A patent/CN108495994B/zh active Active
- 2016-09-29 KR KR1020187017458A patent/KR20180085765A/ko not_active Application Discontinuation
- 2016-09-29 EP EP16777656.6A patent/EP3380716B1/de active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006048727A1 (de) * | 2006-10-16 | 2008-04-17 | Robert Bosch Gmbh | Kraftstoffinjektor mit Magnetventil |
WO2013083522A1 (de) * | 2011-12-08 | 2013-06-13 | Robert Bosch Gmbh | Einspritzventil, insbesondere für eine brennkraftmaschine |
DE102012204310A1 (de) * | 2012-03-19 | 2013-09-19 | Robert Bosch Gmbh | Dicht umspritztes Bauelement und Verfahren zum Herstellen eines solchen Bauelements |
EP2700806A1 (de) * | 2012-08-23 | 2014-02-26 | Continental Automotive GmbH | Brennstoffeinspritzdüse, Brennstoffeinspritzanordnung und Verwendung eines Dichtungsrings |
DE102012222167A1 (de) | 2012-12-04 | 2014-06-05 | Robert Bosch Gmbh | Alternativer Hochdruckanschluss mit Feder-Dichtlinse |
DE102014201854A1 (de) | 2014-02-03 | 2015-08-06 | Robert Bosch Gmbh | Dichtscheibe für einen Kraftstoffinjektor, sowie Kraftstoffinjektor mit einer derartigen Dichtscheibe |
Also Published As
Publication number | Publication date |
---|---|
EP3380716A1 (de) | 2018-10-03 |
KR20180085765A (ko) | 2018-07-27 |
CN108495994B (zh) | 2021-06-08 |
EP3380716B1 (de) | 2020-05-06 |
DE102015223440A1 (de) | 2017-06-01 |
CN108495994A (zh) | 2018-09-04 |
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