EP1310669A2 - Injecteur à combustible à montage simple à travers un couvercle de soupape monobloc - Google Patents

Injecteur à combustible à montage simple à travers un couvercle de soupape monobloc Download PDF

Info

Publication number
EP1310669A2
EP1310669A2 EP02025179A EP02025179A EP1310669A2 EP 1310669 A2 EP1310669 A2 EP 1310669A2 EP 02025179 A EP02025179 A EP 02025179A EP 02025179 A EP02025179 A EP 02025179A EP 1310669 A2 EP1310669 A2 EP 1310669A2
Authority
EP
European Patent Office
Prior art keywords
fuel injector
forks
clamping claw
shaft
diameter
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Withdrawn
Application number
EP02025179A
Other languages
German (de)
English (en)
Inventor
Werner Wagner
Siegfried Ruthardt
Hermann Koch-Groeber
Andreas Gaudl
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 EP1310669A2 publication Critical patent/EP1310669A2/fr
Withdrawn legal-status Critical Current

Links

Images

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

  • High-pressure injection systems are increasingly being used in fuel injection systems for internal combustion engines with a high-pressure common room.
  • the fuel injectors on the internal combustion engine are made by these high-pressure injection systems supplied with fuel under very high pressure. by virtue of The prevailing pressure conditions make it extremely secure to secure the fuel injectors important.
  • the fuel injectors are usually designed with a fork-shaped design Clamping claws (clamps) attached in the cylinder head.
  • the forks of a clamping claw rest on flat recesses in the fuel injector on.
  • the forks also have curved lugs on the shoulders of the fuel injector rest.
  • the clamping claw is through a fastening screw in the cylinder head attached; in addition, it is secured by a counter bearing, with a partial area this counter bearing on the lever point of the clamping claw reinforced with a survey acts.
  • the cover For an expansion of the injector, the cover must first of all, as well the counter bearing are removed. The expansion is therefore labor and time intensive.
  • the claws of GB-A 2 213 197 also have curved lugs Shoulders rest on the fuel injector.
  • the inside of their forks are flat and lying flat recesses in the fuel injector.
  • the forks of the clamp opposite part of the clamping claw is supported by an additional support arm.
  • the fastening device for the fuel injector also contains a device which allows the support arm to be aligned.
  • DE-C 44 13 415 describes a fastening device in which the Spaunpratze from gripped like a claw and is thus additionally secured. They are also here Forks the clamp on flat recesses on the fuel injector.
  • the fastening devices for fuel injectors known from the prior art in the cylinder head of an internal combustion engine, the need is common, the clamping claw by additional devices such as a counter bearing, a support arm or secure a clamp to ensure an optimal fit of the fuel injector to be able to.
  • the forks of the clamps each lie on flat recesses of the fuel injector.
  • the width l 1 the point with the lugs is not larger than the original diameter d 0 , it is possible to push the stem of the fuel injector for mounting through a hole in the valve cover with diameter d 0 and through the forks of the clamping claw with distance d 2 , that the approaches are below the forks of the clamping claw, and to secure them by turning through 90 ° and fastening the clamping claw with a fastening screw.
  • d 1 ⁇ d 2 .
  • the fuel injector is now pressed firmly into its mounting hole in the cylinder head by the forks of the clamping claw resting on the shoulders.
  • the force ratios here are the same as in the fastening devices known from the prior art. Additional fastening elements for securing the clamping claw - apart from a fastening screw (clamping screw) - are however not necessary. Nor is it necessary for the fuel injector to have flat recesses.
  • the fuel injector can be easily removed after loosening the fastening screw by turning it 90 ° again and pulling the fuel injector through the forks the claw through the opening in the valve cover.
  • An expansion the valve cover is no longer necessary. This is particularly advantageous because of an expansion of the valve cover means increased assembly effort and the risk of contamination of the oil mist space around the camshafts and their storage during assembly.
  • the fuel injector can therefore from above after the valve cover has already been installed through a round opening in the valve cover so that the part of the fuel injector towards the injector in the camshaft chamber with a claw located there is secured while the part of the fuel injector with the high pressure connection and the connector is outside the camshaft space. Because the opening in the valve cover is round, sealing is easily possible. The use of a split valve cover can be avoided.
  • a cylindrical sealing surface is preferably applied to the shaft of the fuel injector, on which the seal sits in the valve cover. Because the force of the claw preferred close to the cylinder, the sealing surface is at the top of the fuel injector above the claw appropriate.
  • the valve cover also has an additional opening through which the tool for Tightening or loosening the fastening screw of the clamping claw is made possible.
  • the Dimension of this opening is determined by the dimension of the tool for loosening and tightening the fastening screw.
  • the opening can be done with a simple plug or a screw can be closed.
  • the lugs on the shaft of the fuel injector can be of any shape and have a variable material thickness, but the following should be noted:
  • the width l 1 of the fuel injector at the location provided with lugs is less than or equal to the original diameter d 0 of the fuel injector.
  • the width l 1 is preferably less than or equal to the length of the forks of the clamping claws l 2 (l 1 l l 2 ).
  • the forks of the clamp are generally rectangular. Their corners are preferably rounded. When assembled, the forks are usually not in direct contact with the shaft of the fuel injector, but are a tenth of a mm apart.
  • the tapered shaft of the fuel injector has a diameter d 1 that is less than or equal to the distance d 2 of the two forks of the clamping claw from one another.
  • the distance d 5 of the lugs from the point of the fuel injector at which it still has the diameter d 0 must be at least as large as the material thickness d 4 of the forks of the clamping claw.
  • the lugs are made from the same material as the fuel injector stem and shaped out of it.
  • the approaches can also be done separately Output part to be attached to the fuel injector shaft.
  • FIGs 1, 2, 4 and 4a show the fuel injector in the assembled state
  • the figures 3a and 3b show it in the unmounted state.
  • Figure 1 shows a device known from the prior art for fastening a Fuel injector 1.
  • Part 1a of the fuel injector with the connector for the High-pressure manifold (common rail) lies outside the camshaft chamber of the internal combustion engine.
  • the part of the fuel injector on the injector side is located itself in the camshaft space and is secured there by means of a traverse 9, which is secured with two fastening screws 3 is attached to the cylinder head.
  • a traverse 9 which is secured with two fastening screws 3 is attached to the cylinder head.
  • To remove the fuel injector too valve cover 4 must also be removed.
  • Figure 2 shows an inventive device for fastening a fuel injector 1 in the cylinder head of the camshaft chamber of an internal combustion engine, containing a fuel injector 1, the shaft 7 tapers towards the injection nozzle 6 from a diameter d 0 to a diameter d 1 and at the tapered shaft of each other opposite lugs 5a and 5b are at a distance d 5 from the injector part 1a with the diameter d 0 .
  • the forks 2a and 2b of the fork-shaped clamping claw 2 which have a material thickness d 4 , rest on the shoulders.
  • the approaches 5a and 5b are rectangular here on the side facing away from the fuel injector. It can clearly be seen that the point with the shoulders 5a and 5b is not wider than the original diameter d 0 of the fuel injector.
  • the distance d 5 must be at least as large as the material thickness d 4 of the forks 2a and 2b.
  • FIG 3a the fastening device according to the invention shown in Figure 2 can be seen in supervision and in the unassembled state.
  • the clamping claw 2 is shown completely in this figure, as is its fastening screw 3.
  • the fuel injector 1 has a diameter d 1 at the point provided with projections 5a and 5b, which is at most as large as the distance d 2 of the two forks 2a and 2b of the claws from each other.
  • the point with the shoulders 5a and 5b has a width l 1 which is at most as large as the original diameter d 0 of the fuel injector.
  • the width l 1 is preferably less than or equal to the length of the forks l 2 .
  • 3b shows a further fastening device according to the invention for securing a fuel injector 1 with a clamping claw 2, which has two forks 2a and 2b and is fastened to the cylinder head via a fastening screw 3.
  • the illustration shows the fastening device in the top view and the fuel injector in the unmounted state.
  • the approaches 5a and 5b are adapted to the dimensions of the clamping claw at its lowest point 8.
  • the shaft of the fuel injector has a diameter d 1 at the point with the shoulders.
  • FIG. 4 shows a fuel injector 1 which is fastened by a fastening device according to the invention is secured.
  • the fuel injector 1 lies over a cylindrical sealing surface 10 on the undivided valve cover 4.
  • the internal combustion engine is designated 11 here.
  • Part 1a of the fuel injector with the connector for the high-pressure manifold (Common Rail) is outside the camshaft space.
  • the lower part of the In the assembled state shown the fuel injector is inserted into the receiving bore 13 of the cylinder head 12 pressed.
  • the fastening screw for the clamping claw is in the cylinder head 12 attached (not shown).
  • FIG. 4a shows a section of a fastening device according to the invention in the assembled state.
  • a fork 2a of the clamping claw lies on one of the lugs 5a attached to the shaft 7 of the fuel injector.
  • the fork 2a of the clamping claw is rounded and has a small distance r 3 from the shaft of the fuel injector. r 3 is in the range of tenths of a mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP02025179A 2001-11-13 2002-11-11 Injecteur à combustible à montage simple à travers un couvercle de soupape monobloc Withdrawn EP1310669A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10155609 2001-11-13
DE10155609A DE10155609A1 (de) 2001-11-13 2001-11-13 Kraftstoffinjektor mit vereinfachter Montage durch ungeteilten Ventildeckel

Publications (1)

Publication Number Publication Date
EP1310669A2 true EP1310669A2 (fr) 2003-05-14

Family

ID=7705528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02025179A Withdrawn EP1310669A2 (fr) 2001-11-13 2002-11-11 Injecteur à combustible à montage simple à travers un couvercle de soupape monobloc

Country Status (4)

Country Link
US (1) US20030145833A1 (fr)
EP (1) EP1310669A2 (fr)
JP (1) JP2003148297A (fr)
DE (1) DE10155609A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103328809A (zh) * 2011-01-21 2013-09-25 罗伯特·博世有限公司 具有改进的高压接口的燃料喷射阀

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6755228B2 (ja) * 2017-10-26 2020-09-16 ヤンマーパワーテクノロジー株式会社 エンジン
US11608804B1 (en) 2021-08-25 2023-03-21 Caterpillar Inc. Fuel injector having side-fitted fuel connector for tight packaging in top-feed fuel system
US11603817B1 (en) 2021-08-25 2023-03-14 Caterpillar Inc. Slim-profile fuel injector for tight packaging in top feed fuel system
US11644000B2 (en) * 2021-08-25 2023-05-09 Caterpillar Inc. Fuel injector clamp assembly for offset clamping bolt and cylinder head assembly with same
US11898516B2 (en) 2021-08-25 2024-02-13 Caterpillar Inc. Cylinder head having bore locations arranged for tight packaging of gas exchange and fuel system components
US20230064203A1 (en) * 2021-08-25 2023-03-02 Caterpillar Inc. Fuel injector having controlled nozzle tip protrusion in cylinder head and cylinder head assembly with same
JP2023044793A (ja) * 2021-09-21 2023-04-03 いすゞ自動車株式会社 インジェクタの固定構造及びインジェクタの引き抜き方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213197A (en) 1987-12-05 1989-08-09 Perkins Engines Group I.C. engine fuel injector clamp
DE4413415C1 (de) 1994-04-18 1995-06-08 Daimler Benz Ag Vorrichtung zur Befestigung eines Kraftstoffeinspritzventiles
EP0957263A1 (fr) 1998-05-09 1999-11-17 Perkins Engines Company Limited Bride de fixation d'un injecteur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213197A (en) 1987-12-05 1989-08-09 Perkins Engines Group I.C. engine fuel injector clamp
DE4413415C1 (de) 1994-04-18 1995-06-08 Daimler Benz Ag Vorrichtung zur Befestigung eines Kraftstoffeinspritzventiles
EP0957263A1 (fr) 1998-05-09 1999-11-17 Perkins Engines Company Limited Bride de fixation d'un injecteur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103328809A (zh) * 2011-01-21 2013-09-25 罗伯特·博世有限公司 具有改进的高压接口的燃料喷射阀
CN103328809B (zh) * 2011-01-21 2018-05-15 罗伯特·博世有限公司 具有改进的高压接口的燃料喷射阀
US10954906B2 (en) 2011-01-21 2021-03-23 Robert Bosch Gmbh Fuel injector having an improved high-pressure connection

Also Published As

Publication number Publication date
US20030145833A1 (en) 2003-08-07
JP2003148297A (ja) 2003-05-21
DE10155609A1 (de) 2003-05-28

Similar Documents

Publication Publication Date Title
EP2961977B1 (fr) Dispositif pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion
EP2188516B1 (fr) Dispositif d'injection de carburant
DE2208646C2 (de) Vorrichtung zur Befestigung elektromagnetischer Einspritzventile an gemischverdichtenden Brennkraftmaschinen
DE3323010C2 (fr)
DE202004009755U1 (de) Vorrichtung zum Ausziehen eines Düsenstockes
DE60024938T2 (de) Verbindungsanordnung
EP1129286B1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
DE69107405T2 (de) Hochdruck-Dichtungssystem für das Steuerventil eines elektromagnetischen Brennstoffeinspritzventils für Verbrennungsmotoren.
EP2905461B1 (fr) Installation d'injection de carburant dotée d'un composant destiné à guider le carburant, d'une soupape d'injection de carburant et d'un support
EP1310669A2 (fr) Injecteur à combustible à montage simple à travers un couvercle de soupape monobloc
DE19528047A1 (de) Brennkraftmaschine mit einem daran befestigten Saugmodul bzw. Saugrohr und Verfahren zur Befestigung eines Saugmoduls bzw. Saugrohrs an einer Brennkraftmaschine
DE4430339A1 (de) Anordnung zur Flanschverbindung
DE60217064T2 (de) Kraftstoff-einspritzdüse
DE3010328A1 (de) Kraftstoffeinspritzduese fuer brennkraftmaschinen
DE10139622B4 (de) Einspritzventil
DE19913680B4 (de) Kraftstoffinjektoreinheit
DE10043084A1 (de) Spannelement für ein Brennstoffeinspritzventil und Brennstoffeinspritzanlage
DE102019207390B4 (de) Zylinderkopf für eine Brennkraftmaschine mit Kraftstoffrail und einem Einspritzventil, Verfahren zum Montieren sowie Verwendung hierfür
DE202004009756U1 (de) Vorrichtung mit Stützgabel zum Ausziehen eines Düsenstockes
DE102005052419B4 (de) Schraubverbindung
EP2053235B1 (fr) Moteur à combustion interne doté d'injecteurs de carburant
DE3329418C2 (de) Abdichtung einer Zylinderkopfhaube am Zylinderkopf einer Brennkraftmaschine
DE102008001533A1 (de) Einspritzdüsenhalter-Montageverbund mit Spannpratze
WO2008058799A1 (fr) Injecteur de carburant
EP0068337B1 (fr) Culbuteur pour commander les soupapes de moteurs à combustion interne

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

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

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

18D Application deemed to be withdrawn

Effective date: 20060531