WO2003025384A1 - Befestigungsanordnung zur befestigung von injektoren an einem zylinderkopf - Google Patents
Befestigungsanordnung zur befestigung von injektoren an einem zylinderkopf Download PDFInfo
- Publication number
- WO2003025384A1 WO2003025384A1 PCT/DE2002/003456 DE0203456W WO03025384A1 WO 2003025384 A1 WO2003025384 A1 WO 2003025384A1 DE 0203456 W DE0203456 W DE 0203456W WO 03025384 A1 WO03025384 A1 WO 03025384A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injector
- fastening
- force
- arrangement according
- fastening arrangement
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
Definitions
- the present invention relates to a fastening arrangement for fastening an injector to a cylinder head according to the preamble of patent claim 1.
- FIG. 4 shows a fastening arrangement for fastening an injector to a cylinder head according to the prior art.
- the injector 1 consists in a known manner of several injector modules 7, 2, 3, which are arranged one after the other in the axial direction MM of the injector.
- the main components of the injector are an injector body 7, a stop disk 2, an injection nozzle 3 and a nozzle clamping nut 4 which clamps the injector modules 7, 2, 3 against one another.
- the nozzle clamping nut 4 exerts a predefined axial force F v .
- the axial force F v is designed in such a way that both a sealing function at the separating surfaces between the individual injector modules is fulfilled and a deformation and load inside the injector modules does not exceed a predetermined amount in order to prevent damage to the components.
- the injector 1 preloaded in this way is sealed by means of a sealing washer 5 on the cylinder head 6.
- the force F required for sealing is applied directly to the injector body 1.
- this fastening force F must be limited. However, this also limits the seal between the cylinder head 6 and the injector 1. As a result, undesired leaks and leaks can occur between the cylinder head 6 and the injector 1.
- the fastening arrangement according to the invention for fastening the injector to the cylinder head is designed such that a fastening force for fastening the injector acts directly or indirectly on the biasing element of the injector. This can prevent the fastening force from acting directly on the vector modules. It is therefore possible that a higher fastening force than in the prior art is used, so that there is an improved seal between the cylinder head and the injector. Since the fastening force is no longer applied directly to the injector modules, damage to the injector modules can also be reliably prevented. By applying the force to the biasing element of the injector, the fastening force can thus be used completely for sealing.
- the fastening force is preferably introduced in the direction of the force introduction at a position which lies after a first tensioning contact between the biasing element and the injector modules. It is thereby achieved that the fastening force is passed completely past the injector modules, since the force in the direction of the force introduction on the nozzle clamping nut is only introduced after the first clamping contact.
- This makes it possible in particular to take advantage of the fact that the biasing element of the injector is not completely rigid, but rather has a certain flexibility. Due to the advantageously selected position of the force introduction, this flexibility according to the invention dimension are used so that there is no additional impact on the injector modules clamped by the biasing element.
- the fastening force is preferably introduced via an additional, sleeve-like component.
- the sleeve-like component particularly preferably engages a collar formed on the prestressing element.
- the fastening force is transmitted directly to the cylinder head via the sleeve-like component and the collar of the prestressing element.
- a sealing disk can be arranged between the prestressing element and the cylinder head for better sealing.
- the collar is arranged on a lower end region of the prestressing element.
- annular element is arranged between the prestressing element and the sleeve-like component.
- the annular element preferably has a circular or oval cross section.
- the ring-shaped element can be designed, for example, as an embossed ring or as a slotted ring.
- the annular element is designed as a nut which is screwed onto an external thread on the prestressing element. The fastening force can then be applied to the nut Preload element can be initiated.
- the use of the nut has the advantage over the formation of a collar on the prestressing element that the sleeve-like component can only be plugged on after the injector has been installed.
- the external thread for fastening the nut is preferably arranged at a position of the prestressing element which is in the direction of the force application at a position after the first prestressing contact of the prestressing element with the injector modules.
- the external thread is particularly preferably arranged on the lower end region of the prestressing element.
- the prestressing element is preferably designed as a nozzle tension nut.
- a first bracing contact is advantageously carried out via a thread and a second bracing contact is provided by a shoulder on the nozzle clamping nut.
- the fastening force is preferably applied to the prestressing element by means of a claw attached to the cylinder head.
- the claw can, for example, be screwed or caulked to the cylinder head or fastened in any other way.
- the introduction of the fasteners is particularly advantageous. force on the biasing element after a first tensioning contact to completely rule out the introduction of force to components of the injector.
- a certain flexibility of the prestressing element can be used here. If the first tensioning contact is additionally made of thread, the usable flexibility can be increased further, since the thread further reduces a rigid behavior of the prestressing element. This applies in the same way if a nut is provided on the prestressing element, via which the fastening force is introduced.
- FIG. 1 shows a schematic sectional view of a fastening arrangement according to a first exemplary embodiment of the present invention
- FIG. 2 shows a schematic sectional view of a fastening arrangement according to a second exemplary embodiment of the present invention
- Figure 3 is a schematic sectional view of a fastening arrangement according to a third embodiment of the present invention.
- Figure 4 is a schematic sectional view of a mounting arrangement according to the prior art.
- FIG. 1 shows a fastening arrangement for fastening an injector 1 to a cylinder head 6 according to a first exemplary embodiment.
- the injector 1 consists of several injector modules 7, 2, 3, which are arranged one after the other in the axial direction.
- the injector modules are more precise as injector bodies 7, as stop Disc 2 and designed as an injector 3.
- the injector modules 7, 2, 3 are clamped against one another in a known manner by means of a nozzle clamping nut 4, a first clamping contact 13 and a second clamping contact 14 to the injector modules being formed on the nozzle clamping nut 4.
- the first bracing contact 13 is designed as a thread and the second bracing contact 14 is designed as a shoulder in the nozzle clamping nut 4.
- the injector modules are now clamped simply by screwing the nozzle clamping nut onto the thread 13. This creates an axial force F v for the clamp, which is designed such that both the sealing function between the separating surfaces of the individual injector modules is fulfilled, as well as deformation and excessive Load on the individual injector modules does not occur.
- the fastening arrangement for fastening the injector 1 to the cylinder head 6 now mainly consists of a sleeve 8 which is on a collar formed on the nozzle clamping nut 4
- the collar 9 is present.
- the collar 9 is at a lower end
- the fastening force F is now applied to the sleeve 8 so that the force is applied to the cylinder head 6 via the sleeve 8, the collar 9 and a sealing washer 5 arranged between the nozzle clamping nut 4 and the cylinder head 6.
- the fastening force F is introduced in the direction of the force application (in FIG. 1 in the direction of the arrow F downward) at a position which is in the direction of the force application after the first tensioning contact 13 (see FIG. 1).
- the fastening force F has no negative effects on the individual Injector modules 7, 2, 3 has.
- the use of a higher fastening force F thus enables an improved sealing on the sealing disk 5 between the injector 1 and the cylinder head 6.
- the flexibility is further increased by using the thread as the first bracing contact 13. According to the invention, the fastening force F is guided past the injector modules.
- FIG. 2 shows a fastening arrangement according to a second exemplary embodiment of the present invention.
- the same or functionally the same parts are designated with the same reference numerals as in the first embodiment.
- a slotted embossing ring 11 is arranged between the sleeve 8 and the nozzle nut 4.
- the fastening force F is thus transmitted via the sleeve 8 and the stamping ring 11 to the collar 9 of the nozzle clamping nut 4 and then to the sealing areas between the injector 1 and the cylinder head.
- the use of the stamping ring 11 results in a resultant application of force F G to the nozzle clamping nut 4, which is composed of an axial force F A and a radial force F R.
- force F G is composed of an axial force F A and a radial force F R.
- the contact area between the sleeve 8 and the stamping ring 11 is, as shown in detail X of FIG. 2, such that the sleeve 8 corresponds to the outer contour of the stamping ring 11.
- the cross-section of the embossing ring is preferably circular or oval. It should be noted that the connection area between the sleeve 8 and the stamping ring 11 can also be designed as a bevel.
- a fastening arrangement according to a third exemplary embodiment of the present invention is described below with reference to FIG. 3.
- the same or functionally identical parts are again identified by the same reference symbols as in the two previous exemplary embodiments.
- the third exemplary embodiment results in particular in an assembly-technical advantage in that the sleeve 8 does not have to be attached during the assembly of the injector 1, but can also be attached after the assembly of the injector. Then the nut 12 is then screwed onto the external thread 15 on the nozzle clamping nut 4.
- the fastening force F is generated, for example, by means of a claw which is fastened to the cylinder head 6.
- the nut 12 can be designed, for example, as a locknut which has cutouts on its contact surfaces, so that it can be screwed on using a special tool. This can prevent the introduction of excessive radial forces that is possible when using a normal nut.
- the present invention thus relates to a fastening arrangement for fastening an injector 1 to a cylinder head 6.
- the injector 1 has a plurality of injector modules 7, 2, 3 which follow one another in the axial direction and are braced against one another by means of a prestressing element 4.
- a fastening force F for fastening the injector 1 acts on the pretensioning element 4 in order to prevent adverse effects of force on the injector modules.
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 (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02774373A EP1427936B1 (de) | 2001-09-18 | 2002-09-16 | Befestigungsanordnung zur befestigung von injektoren an einem zylinderkopf |
DE50203840T DE50203840D1 (de) | 2001-09-18 | 2002-09-16 | Befestigungsanordnung zur befestigung von injektoren an einem zylinderkopf |
JP2003528984A JP4248398B2 (ja) | 2001-09-18 | 2002-09-16 | シリンダヘッドにインジェクタを固定するための固定装置 |
US10/802,022 US6886539B2 (en) | 2001-09-18 | 2004-03-16 | Device for fixing injectors on a cylinder head |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10145988A DE10145988A1 (de) | 2001-09-18 | 2001-09-18 | Befestigungsanordnung zur Befestigung von Injektoren an einem Zylinderkopf |
DE10145988.2 | 2001-09-18 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/802,022 Continuation US6886539B2 (en) | 2001-09-18 | 2004-03-16 | Device for fixing injectors on a cylinder head |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003025384A1 true WO2003025384A1 (de) | 2003-03-27 |
Family
ID=7699431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/003456 WO2003025384A1 (de) | 2001-09-18 | 2002-09-16 | Befestigungsanordnung zur befestigung von injektoren an einem zylinderkopf |
Country Status (5)
Country | Link |
---|---|
US (1) | US6886539B2 (de) |
EP (1) | EP1427936B1 (de) |
JP (1) | JP4248398B2 (de) |
DE (2) | DE10145988A1 (de) |
WO (1) | WO2003025384A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6868539B1 (en) * | 2000-06-28 | 2005-03-15 | Microsoft Corp. | System and method providing single application image |
DE102007001549A1 (de) * | 2007-01-10 | 2008-07-17 | Robert Bosch Gmbh | Dehnhülsenbefestigung |
US7513242B2 (en) * | 2007-05-03 | 2009-04-07 | Cummins Inc. | Fuel injector assembly with injector seal retention |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1948557A (en) * | 1931-07-03 | 1934-02-27 | Bosch Robert | Fuel spraying nozzle |
GB565793A (en) * | 1943-04-22 | 1944-11-28 | Paxman & Co Ltd Davey | Improvements in or relating to fuel injection devices for internal combustion engines |
JPH0988765A (ja) * | 1995-09-27 | 1997-03-31 | Toyota Motor Corp | 内燃機関の燃料噴射弁の取付構造 |
EP0819846A1 (de) * | 1996-07-18 | 1998-01-21 | Denso Corporation | Kraftstoffeinspritzvorrichtung mit Gewindezylinder zur Befestigung eines Kraftstoffeinspritzventils auf einer Brennkraftmaschine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3408012A1 (de) * | 1984-03-05 | 1985-09-05 | Gerhard Dipl.-Ing. Warren Mich. Mesenich | Elektromagnetisches einspritzventil |
DE3908796A1 (de) * | 1988-06-06 | 1989-12-14 | Bosch Gmbh Robert | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
DE4315233A1 (de) * | 1993-05-07 | 1994-07-28 | Daimler Benz Ag | Direkteinspritzende Brennkraftmaschine mit einem im Zylinderkopf zwischen Gaswechselventilen angeordneten Kraftstoffeinspritzventil |
DE19508305A1 (de) * | 1995-03-09 | 1996-09-12 | Bayerische Motoren Werke Ag | Vorrichtung zur Halterung einer Einspritzdüse an einem Maschinenteil, insbesondere im/am Zylinderkopf einer Brennkraftmaschine |
DE19511703A1 (de) * | 1995-03-30 | 1996-10-02 | Bayerische Motoren Werke Ag | Vorrichtung zur Befestigung einer Einspritzdüse insbesondere am Zylinderkopf einer Brennkraftmaschine |
JP3329998B2 (ja) * | 1995-10-17 | 2002-09-30 | 三菱電機株式会社 | 筒内噴射用燃料噴射弁 |
-
2001
- 2001-09-18 DE DE10145988A patent/DE10145988A1/de not_active Withdrawn
-
2002
- 2002-09-16 WO PCT/DE2002/003456 patent/WO2003025384A1/de active IP Right Grant
- 2002-09-16 JP JP2003528984A patent/JP4248398B2/ja not_active Expired - Fee Related
- 2002-09-16 DE DE50203840T patent/DE50203840D1/de not_active Expired - Fee Related
- 2002-09-16 EP EP02774373A patent/EP1427936B1/de not_active Expired - Lifetime
-
2004
- 2004-03-16 US US10/802,022 patent/US6886539B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1948557A (en) * | 1931-07-03 | 1934-02-27 | Bosch Robert | Fuel spraying nozzle |
GB565793A (en) * | 1943-04-22 | 1944-11-28 | Paxman & Co Ltd Davey | Improvements in or relating to fuel injection devices for internal combustion engines |
JPH0988765A (ja) * | 1995-09-27 | 1997-03-31 | Toyota Motor Corp | 内燃機関の燃料噴射弁の取付構造 |
EP0819846A1 (de) * | 1996-07-18 | 1998-01-21 | Denso Corporation | Kraftstoffeinspritzvorrichtung mit Gewindezylinder zur Befestigung eines Kraftstoffeinspritzventils auf einer Brennkraftmaschine |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 07 31 July 1997 (1997-07-31) * |
Also Published As
Publication number | Publication date |
---|---|
JP2005502820A (ja) | 2005-01-27 |
DE10145988A1 (de) | 2003-05-08 |
US20040173186A1 (en) | 2004-09-09 |
EP1427936B1 (de) | 2005-08-03 |
JP4248398B2 (ja) | 2009-04-02 |
DE50203840D1 (de) | 2005-09-08 |
US6886539B2 (en) | 2005-05-03 |
EP1427936A1 (de) | 2004-06-16 |
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