EP2252786A1 - Traversée électrique étanchéifiée - Google Patents

Traversée électrique étanchéifiée

Info

Publication number
EP2252786A1
EP2252786A1 EP08873402A EP08873402A EP2252786A1 EP 2252786 A1 EP2252786 A1 EP 2252786A1 EP 08873402 A EP08873402 A EP 08873402A EP 08873402 A EP08873402 A EP 08873402A EP 2252786 A1 EP2252786 A1 EP 2252786A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
magnet
sealing
magnetic
fuel injector
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
Application number
EP08873402A
Other languages
German (de)
English (en)
Other versions
EP2252786B1 (fr
Inventor
Holger Rapp
Helmut Clauss
Friedrich Howey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2252786A1 publication Critical patent/EP2252786A1/fr
Application granted granted Critical
Publication of EP2252786B1 publication Critical patent/EP2252786B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for

Definitions

  • DE 196 50 865 A1 relates to a solenoid valve for controlling the fuel pressure in a control chamber of an injection valve, such as a common-rail injection system, for the supply of self-igniting internal combustion engines with fuel.
  • a stroke movement of a valve body is controlled with an injection port of the injection valve is opened or closed.
  • the solenoid valve comprises an electromagnet, a movable armature and a valve member moved with the armature and acted upon by a valve closing spring in the closing direction and cooperating with the valve seat of the valve member to control the fuel output from the control chamber.
  • the bushings are sealed with an O-ring joined to the coil pins. These O-rings are first pushed over the coil pins and then inserted with the coil pins from below into the corresponding bore of the sleeve. They come under radial stress and seal both with respect to the bore wall and against the pin jacket surface safely.
  • the hole is tapered upwards. This can be achieved either via a step or via a conical bore shape.
  • the coil pin is encapsulated in its lower part with plastic, which forms a so-called "dome” above the Spulenumspritzung and also avoids touching the coil pins with the magnetic core.
  • the sleeve Since the magnetic core is usually supported on a shoulder in the sleeve, the sleeve has hitherto been made in two parts, i. from an actual sleeve and from a drainage nozzle.
  • the magnetic core with coil was first inserted from above into the sleeve until it rested on the shoulder. Then the drain neck was placed on top and held down with a defined force. Thereafter, discharge spout and sleeve were crimped together and thereby fixed the magnet in its position.
  • the feedthroughs of the coil pins were incorporated in this case in the outlet pipe. If the sleeve is to be made in one piece in a cost effective manner, this has the consequence that the magnetic core must be inserted from below into the sleeve.
  • the inner contour of the sleeve and the outer contour of the core are not rotationally symmetrical, but have a radial contour.
  • the magent coil may not yet be mounted in the magnetic core, but may only be joined to the magnet core from below after mounting and aligning it. Since the outer diameter of the O-rings is larger than the recess for the pin dome in the magnetic core, the solenoid can only be mounted without O-rings. Alternatively, it is possible to perform the sealing of the bushings not with O-rings, but these bushings after Pour out the assembly of the complete magnet assembly with adhesive and seal in this way. However, this variant involves some risks that are critical in view of the error sequence, such as the outward leakage of fuel: Although the adhesive initially filled in the liquid state, the entire space between the sleeve and pin, but then hardens.
  • the vulcanized sealing elements can not be designed with a small réelleöffhung, but consistently.
  • the thickness in the center is smaller than the thickness outside, and the sealing elements are designed such that the sealing element can be pierced there by the contacting pin of the magnetic coil with a small axial force.
  • the sealing elements are pierced at these thinned points and biased in the sequence thereof in the radial direction, so that they also seal to the electrical Kunststofföffhung, but consistently.
  • FIG. 1 shows a section through a magnetic head of a solenoid valve for a fuel injector with a sealing of a contacting pin with an O-ring and with an adhesive injection element
  • FIG. 2 shows a bottom view of a magnetic head with a one-piece sleeve and a magnetic core locked by rotation
  • FIG. 3.1 shows a vulcanized sealing element as an individual part
  • FIG. 3.2 shows a vulcanized sealing element after assembly of the magnetic coil
  • Figure 4.1 is a vulcanized in a passage sealing element without internal opening as a single part
  • Figure 4.2 a vulcanized sealing element after mounting the coil.
  • FIG. 1 shows a magnet group which comprises a magnet coil and is sealed to the outside in two different ways in order to prevent the escape of fuel from a fuel injector.
  • FIG. 1 shows, in section, a magnet group 10 which is accommodated in a magnet sleeve 12, which is formed integrally here.
  • the magnet sleeve 12 and the magnet group 10 are formed symmetrically to an injector axis 14 of a fuel injector, not shown in Figure 1.
  • the fuel injector is actuated, i. a pressure relief of a system under pressure pressure control space causes.
  • the magnet sleeve 12 has a return 16, to which on the outside of the lateral surface 12, a return port 18 is aligned.
  • the magnet group 10 essentially comprises a magnet core 20 and a magnet coil 22 embedded in the magnet core 20.
  • the magnet coil 22 of the magnet group 10 is electrically connected via a contacting pin 28.
  • the Kunststofftechnikspin 28 can - as shown in Figure 1 in the left half - are sealed by an O-ring 32.
  • the O-ring 32 is inserted into a passage 30 and employed by a plastic dome 36 to a shoulder of the magnet sleeve 12.
  • this solution requires that the magnetic coil 22 must be moved during assembly in the magnetic head only in the axial direction and that the O-rings 32 are already pre-assembled on the coil pins.
  • the contacting pin 28 for supplying current to the magnet coil 22 is sealed within the magnet core 20 via an adhesive plug 40.
  • FIG. 2 shows the view of a magnet assembly 10 from the underside.
  • FIG. 2 shows, the magnetic sleeve 12 - see.
  • Representation of Figure 1 - along a circumference of a mounting hole a number of attacks 42. These attacks 42 are formed in the radial direction so that they exceed the diameter of the magnetic core 20 to be mounted.
  • the magnetic core 20, which is, however, inserted from the bottom into the magnet sleeve 12 and rotated in a twisting direction 56, has on its outside a number of wing-shaped widenings. These wing-shaped widenings are inserted into the magnet sleeve 12 in a first angular position 52 of the magnetic core 20 with respect to the magnet sleeve 12.
  • the magnetic coil 22 After assembly of the magnetic core 22 as shown in Figure 2, the magnetic coil 22 is inserted from the underside.
  • the magnetic coil 22 has the Kunststoffssenspins 28 to be contacted electrically, which the bushings 30 -. Representation according to Figure 1 - enforce and electrically contacted on the outside of the magnet sleeve 12 of the magnet group 10.
  • connector lugs are preferably used, which are welded to the Kunststofftechnischspins 28, soldered or electrically connected in some other way.
  • a seal in this solution using O-rings 32 would be only then possible if the magnetic core 20 have passages which are larger than the outer diameter of the mounted on a coil pin 28 O-ring 32.
  • Such large recesses in the magnetic core 20, however, are counterproductive to achieve the desired magnetic force and therefore to avoid as far as possible.
  • FIG. 3.1 shows a first embodiment of the elastic sealing element proposed according to the invention.
  • a vulcanized sealing element 34 is accommodated in the magnet sleeve 12 in the region of the passage 30.
  • the vulcanized sealing element 64 is preferably vulcanized in the context of a diameter transition of the bushing 30 against the paragraph resulting from the diameter transition and fixed in this manner within the bushing 30.
  • the sealing element 64 vulcanized into the passage 30 comprises an inner opening 66.
  • the inner diameter of the inner opening 66 is smaller than the outer diameter of the contacting pins 28, via which the magnet coil 22 of the magnet group 10 is electrically contacted after mounting in the magnet sleeve 12 .
  • the sealing element 64 vulcanized in the illustration in accordance with FIG. 3.1 in the diameter transition of the bushing 30 comprises sealing lips 68 which tightly conform to the outer surface 36 of the contact pin 28 during assembly.
  • FIG. 3.2 shows the vulcanized sealing element in the mounted state of a contacting pin.
  • FIG. 3.2 shows, during assembly of the contacting pin 28 of the magnet coil 22 there is a widening of the inner opening 66 of the sealing element 64 vulcanized in the leadthrough 30.
  • the inner diameter of the vulcanized sealing element 64 is less than the outer diameter of the contacting pin 28 of the magnet coil 22.
  • the sealing element 64 vulcanized into the bushing 30 rests against a shoulder defined by a diameter jump of the bushing 30 and is consequently secured in the axial direction - in relation to the insertion direction of the contacting pins 28 - and in the defined position Position positioned. If the contacting pins 28 are inserted into the sealing element 64 vulcanized into the magnet sleeve 12, the sealing lips 68 are widened radially, so that they conform to the lateral surface 76 of the contacting pins 28 of the magnet coil 22 along a sealing length 72. Depending on the length of the sealing length 72, a seal of the low-pressure region 38 of a fuel injector shown in FIG. 1 is achieved.
  • the inside of the magnet sleeve 12, i. characterized by the area filled by low-pressure fuel, designated by reference numeral 62 is an outer side of the magnet sleeve 12.
  • a leakage of fuel from the low pressure region 38 to the outside is absolutely to prevent.
  • the Kunststofftechnikspin 28 as shown in Figure 3.2 is symmetrical to the axis 78 of the Why Industriesspins 28 executed.
  • Reference numeral 74 designates the sealing lips 68 of the sealing element 12 which has been vulcanized into the magnetic sleeve 12 in the deformed, i. im employed on the lateral surface 76 of themaschinetechnischspins 28 state.
  • Figure 4.1 and Figure 4.2 show a variant of the present invention proposed vulcanized sealing element.
  • the sealing element 64 vulcanized into the magnetic sleeve 12 shown in FIGS. 4.1 and 4.2 differs from the embodiment according to FIGS. 3.1 and 3.2 in that it is designed in a first thickness 80 and a second, reduced thickness 82. Moreover, as shown in FIG. 4.1, it can be seen that the sealing element 64 vulcanized into the magnet sleeve 12 has a funnel-shaped insertion bevel 84. While the second, reduced thickness 82 is present in the center of the substantially rotationally symmetrical vulcanized sealing element 64, the vulcanized sealing element according to the embodiments in FIGS.
  • the first thickness 80 exceeds the second, reduced thickness 82 of the vulcanized sealing element 64 by at least two times.
  • the tip of the Kunststoffiansspins 28 is guided in the assembly of the magnetic coil 22 in the magnetic core 20 toward the center of the area in which the second, compared to the first thickness 80 reduced thickness 82 is present.
  • the tip of the contacting pin 28 penetrates the sealing element 64 vulcanized into the magnetic sleeve 12 in the region of the second, reduced thickness 82 within the insertion bevel 84.
  • Figure 4.2 shows the assembled state of the Kunststoff musclesspins.
  • 4.2 also shows that, due to the deflection of the sealing lips 68 and their transfer into a compressed state 74, a sealing length 72 in the axial direction with respect to the contacting pins 28 is created, which connects the low-pressure region 38 below the armature-side end face 24 Magnet group 10 effectively seals against the outside 62 of the magnet sleeve 12.
  • the vulcanization of the sealing element 64 ensures its stationary seating, wherein the elastic deformation properties of the material of the vulcanized sealing element 64 are not impaired by this type of fastening in the shoulder of the bushing 30 in the magnet sleeve 12.
  • the sealing lips 68 are in the compressed state 74, i. in the deflected to the lateral surface 76 of the Kunststofftechnikspins 28 along the sealing length 72 state.
  • sealing contact pins 28 may also be applied to the sealing of other electrical leads, e.g. the supply lines of piezo actuators or sensors.

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)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un injecteur de carburant avec un groupe magnétique (10), un noyau magnétique (20) et une bobine magnétique (22), dans lequel le groupe magnétique (10) est logé dans une douille magnétique (12). La douille magnétique (12) comprend des traversées (30) pour des broches de contact électriques (28) de la bobine magnétique (22). Des éléments d'étanchéité élastiques (64) sont placés dans les traversées (30) de la douille magnétique (12) de manière que les broches de contact (28) de la bobine magnétique (22), dans l'état monté, soient soumises à une force de précontrainte (70) agissant dans la direction radiale.
EP08873402A 2008-03-19 2008-12-05 Traversée électrique étanchéifiée Not-in-force EP2252786B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008000753A DE102008000753A1 (de) 2008-03-19 2008-03-19 Abgedichtete elektrische Durchführung
PCT/EP2008/066893 WO2009115150A1 (fr) 2008-03-19 2008-12-05 Traversée électrique étanchéifiée

Publications (2)

Publication Number Publication Date
EP2252786A1 true EP2252786A1 (fr) 2010-11-24
EP2252786B1 EP2252786B1 (fr) 2013-04-03

Family

ID=40493912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08873402A Not-in-force EP2252786B1 (fr) 2008-03-19 2008-12-05 Traversée électrique étanchéifiée

Country Status (6)

Country Link
US (1) US20110006137A1 (fr)
EP (1) EP2252786B1 (fr)
JP (1) JP5238065B2 (fr)
CN (1) CN101978157B (fr)
DE (1) DE102008000753A1 (fr)
WO (1) WO2009115150A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104821209B (zh) * 2015-05-04 2017-03-01 特乐斯特机械(上海)有限公司 电缆终端密封装置
JP2020089224A (ja) * 2018-11-30 2020-06-04 日本電産株式会社 モータ、および電動ホイール
JP2020089223A (ja) * 2018-11-30 2020-06-04 日本電産株式会社 モータ、および電動ホイール
CN111641118B (zh) * 2020-06-15 2021-12-31 东营金丰正阳科技发展有限公司 一种防尘配电箱
US11820474B2 (en) * 2020-10-14 2023-11-21 Aqua Satellite, Inc. Feedthroughs for enclosures in deep water vessels

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US3456232A (en) * 1967-07-13 1969-07-15 Burndy Corp Self-sealing connector
US4711397A (en) * 1982-01-11 1987-12-08 Essex Group, Inc. Electromagnetic fuel injector having continuous flow path
JPH01176619A (ja) * 1987-12-29 1989-07-13 Aisin Seiki Co Ltd センサの防水構造
US5244180A (en) * 1992-09-03 1993-09-14 Siemens Automotive L.P. Solenoid pre-loader
DE4242238C2 (de) * 1992-12-15 2001-02-15 Bosch Gmbh Robert Dichtring für einen in eine Öffnung eines Gehäuses ragenden Stift
DE4412277A1 (de) * 1994-04-09 1995-10-12 Bosch Gmbh Robert Elektromagnetisch betätigbares Brennstoffeinspritzventil
DE19650865A1 (de) 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
DE10027662A1 (de) * 2000-06-03 2001-12-06 Bosch Gmbh Robert Dichtmittel und Niederhalter für ein Brennstoffeinspritzventil
EP1628015B8 (fr) * 2004-08-20 2007-10-03 Siemens VDO Automotive AG Système d'étanchéité pour actionneur piezoélectrique d'injecteur de carburant
DE102004063293B4 (de) * 2004-12-29 2010-07-08 Continental Automotive Gmbh Kraftstoffinjektor für eine Brennkraftmaschine
JP2007064076A (ja) * 2005-08-30 2007-03-15 Toyota Motor Corp 内燃機関の燃料噴射装置
EP1867867B1 (fr) * 2006-06-15 2010-08-25 C.R.F. Società Consortile per Azioni Injecteur de carburant
DE102006029966B4 (de) * 2006-06-29 2010-04-22 Continental Automotive Gmbh Abdichtungsanordnung eines Piezoaktors für ein Kraftstoffeinspritzventil einer Brennkraftmaschine
FR2909137B1 (fr) * 2006-11-24 2009-02-27 Electricfil Automotive Soc Par Dispositif d'assemblage pour un actionneur electromagnetique d'un injecteur pour moteur a combustion interne.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009115150A1 *

Also Published As

Publication number Publication date
JP2011514478A (ja) 2011-05-06
CN101978157A (zh) 2011-02-16
EP2252786B1 (fr) 2013-04-03
US20110006137A1 (en) 2011-01-13
DE102008000753A1 (de) 2009-09-24
WO2009115150A1 (fr) 2009-09-24
JP5238065B2 (ja) 2013-07-17
CN101978157B (zh) 2013-06-12

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