EP1723333A2 - Pressverbund aus einem metallteil und einem kunststoffteil - Google Patents
Pressverbund aus einem metallteil und einem kunststoffteilInfo
- Publication number
- EP1723333A2 EP1723333A2 EP05708030A EP05708030A EP1723333A2 EP 1723333 A2 EP1723333 A2 EP 1723333A2 EP 05708030 A EP05708030 A EP 05708030A EP 05708030 A EP05708030 A EP 05708030A EP 1723333 A2 EP1723333 A2 EP 1723333A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- valve
- wall
- metal part
- plastic
- 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.)
- Withdrawn
Links
- 239000002184 metal Substances 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 title claims abstract description 5
- 239000000446 fuel Substances 0.000 claims abstract description 50
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 claims abstract 3
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 239000004744 fabric Substances 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 6
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
-
- 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
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit
Definitions
- the invention is based on a press composite of a metal part and a plastic part pushed onto the metal part with a press fit, in particular on a fuel injection valve for internal combustion engines.
- a “fuel filter 3” is held by a press fit on a metallic valve housing 1 and a metallic valve body 2 protruding axially from the valve housing 1.
- the fuel filter 3 has a pot-shaped base body 4 made of plastic with four pot sections 4a, 4b, 4c, 4d, the inner diameters of which are stepped against one another.
- the upper cylindrical pot section 4a with the largest inside diameter is pushed onto the valve housing 1 with a press fit.
- the adjoining second cylindrical pot section 4b with a reduced inside diameter surrounds the upper region of the valve body 2 with a radial spacing and has a wall opening 5, into each of which a filter fabric 6 is inserted.
- the third pot section 4c adjoining the second pot section 4b tapers like a cone and merges at its lower end into the cylindrical fourth pot section 4d, which press-fits onto the valve body 2.
- radial inlet channels 7 are formed in the valve body 2, which on the one hand open into a central valve chamber 8 and on the other hand on the outer wall of the valve body 2 and form an inlet opening 9 there for the fuel flow to the valve chamber 8.
- valve needle 10 which, together with a valve seat 11, opens or closes an injection opening 12 in the valve chamber 8, electromagnet 13 for actuating the valve needle 10 and valve closing spring 14, are well known, for example from Bosch, Kraftfachtechnische Taschenbuch, 23rd edition, 1999, pages 473 and 476, so that there is no need to go into this in detail.
- the press assembly according to the invention consisting of a metal part and a plastic part, has the advantage that no tight manufacturing tolerances are required between the two parts to be pressed together, and a press fit of the plastic part on the metal part that is reliable under all operating conditions and secure assembly are guaranteed without special conditioning requirements must be observed for the plastic part.
- any chips that peel off the plastic part are caught in the ring grooves sunk into the wall of the metal part at the base of the ribs and cannot get between the contact surfaces of the
- Press pressed parts and thus create an undefined pressing surface.
- the force behavior during assembly i.e. the postponement, is constant over a longer production period and has only a small spread, so that it can be monitored well.
- the ribs lying one behind the other are designed such that their protruding height, seen transversely to the pushing-on direction of the plastic part, grows over the wall of the metal part in the pushing-on direction of the plastic part, which means that the first rib, which is closer to the pushing-on direction, has a lower protruding height than that in the pushing-on direction further away from
- Last rib made of plastic. This configuration of the ribs ensures a slow increase in the pressure when the plastic part is pushed onto the metal part.
- Claims 5 to 9 specify a fuel valve, in particular an injection valve, for internal combustion engines, in which the press connection according to the invention is produced between the valve body, which represents a metal part, and the fuel filter, which represents a plastic part.
- Fig. 1 shows a longitudinal section of a fuel injection valve according to the prior art
- Fig. 2 shows a detail of a longitudinal section of a fuel injection valve according to the invention.
- the fuel injection valve shown only partially in longitudinal section in FIG. 2 has a cylindrical valve body 22, in which a valve chamber 28 and at least one inlet channel 27 for supplying fuel to the valve chamber 28 are formed.
- valve chamber 28 is provided with a valve opening or spray hole which is surrounded by a valve seat.
- the valve needle 30 shown in detail in FIG. 2 plunges into the valve chamber 28 and, as in FIG. 1, is pressed onto the valve seat by a valve closing spring. whereby the valve opening is closed.
- the valve needle 30 is actuated by an electromagnet, which when an excitation current is applied
- Valve needle 30 lifts against the force of the valve closing spring from the valve seat, so that the valve opening is released and fuel is sprayed out of the valve chamber 28.
- the electromagnet is in turn accommodated in the valve housing 21.
- the valve body 22 is inserted into the valve housing 21 from below and in the region of a valve body section with an enlarged diameter with the valve housing 21 by a circumferential one
- annular chamber 32 is formed between the inner wall 211 of the valve housing 21 and the cylinder wall 221 of the valve body 22, in which the inlet channels 27 open with their inlet openings 29.
- the fuel flow to the valve chamber 28 takes place via the annular chamber 32 and the inlet channels 27.
- the fuel filter 23 r has a hollow cylindrical base body 24 made of plastic, the inside diameter of which is slightly larger than the outside diameter of the valve body 22.
- wall openings that is to say continuous wall openings 25 are incorporated, via which the inlet channels 27 connect to the annular chamber 34 stand.
- Each wall opening 25 is spanned by a filter fabric 26. The fuel filter 23 is pushed onto the valve body 22 in the direction of arrow 33.
- Each of the three circumferential rips 34, 35, 36 has a back 37 which rises radially in the push-on direction 33 of the fuel filter 23 and a flank 38 which drops steeply from the back end, which in the exemplary embodiment of FIG Fig. 2 extends radially.
- the radial projection height of the ribs 34, 35, 36 increases in the push-on direction 33 of the plastic filter 23, so that the first rib 34 has the smallest projection height and thus the smallest radial dimension of the flank 38 and the last rib 36 the has the greatest projecting height and thus the largest radial dimension of the flank 38.
- Each rib 34, 35, 36 is preceded by an annular groove 39 in the slide-on direction 33 of the fuel filter 23, which is incorporated directly into the cylinder wall 221 at the foot of the back 37.
- the fuel filter 23 with its base body 24 made of plastic is pressed over the ribs 34-36. Pressing the ribs 34-36 over is facilitated by the inclined back 37. The gradual increase in the projecting dimension of the ribs 34-36 over the cylinder wall 221 ensures a slow increase in the pressure.
- the pressing itself acts directly on the ribs 34-36 as a line contact and not over the entire pressing path, as a result of which the base body 24 is easily deformed.
- the base body 24 is loaded with a locally high line pressure, which is more advantageous for the plastic base body than a cylindrical load. With the complete pressing of the fuel filter 23 onto the valve body 22, the base body 24 hooks onto the ribs 34-36.
- Chips and scrapings made of plastic which are detached from the base body 24 during the pressing-on, can become detached in the annular grooves 39 at the foot of the Collect the back 37 of the ribs 34 - 36 and are not pushed outwards.
- the plastic chips or chips are not pressed into the gap between the base body 24 and the valve body 22 and do not wedge there. Nor can they get into the area of the inlet channels 27 and be flushed in there by the fuel via the inlet channels 27 into the valve seat area.
- the invention is not limited to the exemplary embodiment of a fuel injection valve shown and described in FIG. 2.
- the press assembly according to the invention which is described using the example of a fuel injection valve, consisting of a metal part and on a plastic part pushed onto the metal part with a press fit, can in principle be used in any plastic-metal part connection.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
- Laminated Bodies (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004010174.4A DE102004010174B4 (de) | 2004-03-02 | 2004-03-02 | Pressverbund aus einem Metallteil und einem Kunststoffteil |
| PCT/EP2005/050687 WO2005085621A2 (de) | 2004-03-02 | 2005-02-16 | Pressverbund aus einem metallteil und einem kunststoffteil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1723333A2 true EP1723333A2 (de) | 2006-11-22 |
Family
ID=34853908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05708030A Withdrawn EP1723333A2 (de) | 2004-03-02 | 2005-02-16 | Pressverbund aus einem metallteil und einem kunststoffteil |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7540435B2 (de) |
| EP (1) | EP1723333A2 (de) |
| JP (1) | JP4171045B2 (de) |
| DE (1) | DE102004010174B4 (de) |
| WO (1) | WO2005085621A2 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007008863A1 (de) * | 2005-08-26 | 2008-08-28 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
| DE102005061408A1 (de) * | 2005-12-22 | 2007-06-28 | Robert Bosch Gmbh | Kunststoff-Metall-Verbindung und Brennstoffeinspritzventil mit einer Kraftstoff-Metall-Verbindung |
| JP4628461B2 (ja) * | 2008-10-24 | 2011-02-09 | 三菱電機株式会社 | 燃料噴射弁 |
| US8460422B2 (en) | 2010-09-17 | 2013-06-11 | Caterpillar Inc. | Exhaust aftertreatment system, and engine service package having fuel filtering mechanism |
| EP2940286A1 (de) * | 2014-05-01 | 2015-11-04 | Delphi International Operations Luxembourg S.à r.l. | Kraftstoffeinspritzventilfilter |
| EP3076004B1 (de) * | 2015-04-02 | 2018-09-12 | Continental Automotive GmbH | Ventilanordnung mit einem Partikelrückhalteelement und Flüssigkeitsinjektionsventil |
| US10941742B2 (en) * | 2018-04-09 | 2021-03-09 | Caterpillar Inc. | Perforated integral filter sleeve for fuel injector and fuel system setup method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4431044A1 (de) * | 1994-09-01 | 1996-03-07 | Bosch Gmbh Robert | Gasverteilereinrichtung für Brennstoffeinspritzanlagen |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4938193A (en) | 1987-06-15 | 1990-07-03 | Stanadyne Automotive Corp. | Fuel injection nozzle |
| JPH0799128B2 (ja) | 1989-10-04 | 1995-10-25 | 株式会社ユニシアジェックス | フューエルインジェクタ |
| DE4131535A1 (de) * | 1991-09-21 | 1993-03-25 | Bosch Gmbh Robert | Elektromagnetisch betaetigbares einspritzventil |
| US5238192A (en) * | 1991-12-18 | 1993-08-24 | Siemens Automotive L.P. | Filter for solenoid operated fluid metering devices |
| DE19638201B4 (de) * | 1996-09-19 | 2005-05-04 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
| DE19647587A1 (de) | 1996-11-18 | 1998-05-20 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
| US5853202A (en) * | 1997-06-17 | 1998-12-29 | Teleflex Incorporated | Hose end fitting assembly |
| US6561550B1 (en) * | 2000-10-16 | 2003-05-13 | Alfmeier Prazision Ag Baugruppen Und Systemlosungen | Hose connection |
| US6547154B2 (en) * | 2000-12-29 | 2003-04-15 | Siemens Automotive Corporation | Modular fuel injector having a terminal connector interconnecting an electromagnetic actuator with a pre-bent electrical terminal |
-
2004
- 2004-03-02 DE DE102004010174.4A patent/DE102004010174B4/de not_active Expired - Fee Related
-
2005
- 2005-02-16 EP EP05708030A patent/EP1723333A2/de not_active Withdrawn
- 2005-02-16 JP JP2006508320A patent/JP4171045B2/ja not_active Expired - Fee Related
- 2005-02-16 US US10/590,617 patent/US7540435B2/en not_active Expired - Fee Related
- 2005-02-16 WO PCT/EP2005/050687 patent/WO2005085621A2/de not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4431044A1 (de) * | 1994-09-01 | 1996-03-07 | Bosch Gmbh Robert | Gasverteilereinrichtung für Brennstoffeinspritzanlagen |
Also Published As
| Publication number | Publication date |
|---|---|
| US20070181713A1 (en) | 2007-08-09 |
| JP2007526957A (ja) | 2007-09-20 |
| DE102004010174B4 (de) | 2017-04-06 |
| WO2005085621A3 (de) | 2007-02-22 |
| JP4171045B2 (ja) | 2008-10-22 |
| WO2005085621A2 (de) | 2005-09-15 |
| US7540435B2 (en) | 2009-06-02 |
| DE102004010174A1 (de) | 2005-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
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| AX | Request for extension of the european patent |
Extension state: AL BA HR LV MK YU |
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| PUAK | Availability of information related to the publication of the international search report |
Free format text: ORIGINAL CODE: 0009015 |
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| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): DE FR IT |
|
| 17P | Request for examination filed |
Effective date: 20070822 |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): DE FR IT |
|
| 17Q | First examination report despatched |
Effective date: 20081218 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20140902 |