EP1347168B1 - Injecteur pour moteurs à combustion interne - Google Patents

Injecteur pour moteurs à combustion interne Download PDF

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Publication number
EP1347168B1
EP1347168B1 EP03001751A EP03001751A EP1347168B1 EP 1347168 B1 EP1347168 B1 EP 1347168B1 EP 03001751 A EP03001751 A EP 03001751A EP 03001751 A EP03001751 A EP 03001751A EP 1347168 B1 EP1347168 B1 EP 1347168B1
Authority
EP
European Patent Office
Prior art keywords
insert
housing
counterpart
injector according
nozzle part
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.)
Expired - Lifetime
Application number
EP03001751A
Other languages
German (de)
English (en)
Other versions
EP1347168A2 (fr
EP1347168A3 (fr
Inventor
Hans-Joachim Koch
Wilhelm Malitsky
Horst Ressel
Wolfgang Scheibe
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.)
LOrange GmbH
Original Assignee
LOrange 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
Priority claimed from DE2002112002 external-priority patent/DE10212002C1/de
Application filed by LOrange GmbH filed Critical LOrange GmbH
Publication of EP1347168A2 publication Critical patent/EP1347168A2/fr
Publication of EP1347168A3 publication Critical patent/EP1347168A3/fr
Application granted granted Critical
Publication of EP1347168B1 publication Critical patent/EP1347168B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M61/168—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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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

Definitions

  • the invention relates to an injection injector for internal combustion engines.
  • multi-part, consisting of axially clamped elements construction include known from WO 01/12981 A1 injectors in series connection a nozzle part, a pilot part and an actuator in the form of a magnetic actuator. If the actuator is energized, then a control chamber is pressure-relieved via the pilot part, the pressure of the nozzle needle of the nozzle part is pressurized in the direction of its closing direction and is thus pressed.
  • the pilot part comprises a control insert, in which an elongated, slender valve rod is guided as a control, which extends between the actuator and a counterpart fixed axially to the housing.
  • About the valve stem is located in the connection between the control chamber and low pressure side connection channel can be shut off.
  • the valve rod has, based on the size of the distance between an actuator-side stop and the controlled by the valve rod mouth of the connecting channel on a small oversize, which is dimensioned so that it can be adjusted by the elastic compliance of the valve rod with fitted between the actuator and counterpart control insert ,
  • the control insert has a sleeve-like jacket which receives the guide for the valve rod and which in turn is inserted and fitted in the central housing bore and lies between the actuator and the nozzle part.
  • a fuel injection valve for internal combustion engines is known, the valve holding body is inserted into the housing of the internal combustion engine and the high pressure connection is formed by a pressure pipe also used in the housing of the engine, wherein the receiving bore for this pressure pipe socket on the bore opens for the valve holding body and the pressure pipe socket is braced in the region of its free end against the housing.
  • the clamping takes place via a clamping nut, which connects the pressure pipe socket with a subsequent pressure line, wherein the pressure line terminates in a radially widened and conically engaging in a corresponding receptacle of the pressure pipe socket head piece.
  • the clamping nut is screwed into the receiving bore for the pressure pipe socket via a neck enclosing the pressure pipe neck and surrounds the pressure line at a distance from the mother head and head piece with a deformation element enclosing the pressure pipe, which is designed as a sleeve and over which the height of the To be limited by the clamping nut on the pressure pipe socket transferable axial clamping forces to a predetermined limit, by plastic deformation of the deformation element when exceeding the elastic limit.
  • the invention has for its object to find a support for an application for a multi-part, axially clamped injector, which allows a constructive limitation of the clamping force up while ensuring the required minimum axial clamping force, and this also when mounting the control insert as a prefabricated mounting unit and at From the point of view of manufacturing advantageous coarse tolerances, without resulting in impairments of the functionality of the injection injector, although not by the other structure of the injection injector and by its installation in the internal combustion engine-related tension.
  • the housing forms a stop for the nozzle part or a counterpart upstream of the nozzle part, which constitutes a transition element.
  • this stop ie when clamping the nozzle part or a nozzle part upstream counterpart (transition element) against the housing, for example, in the context of the axial clamping of the injector, the nozzle part or the nozzle part and the counterpart to the housing fixed axially, so that the dimensioning of the length of the support sleeve, which has an excess length in the initial state, the tension of the insert against the nozzle part or the upstream counterpart is ensured.
  • the radial guide section for the control insert is expediently formed by a radially projecting shoulder, so that a radially recessed shoulder results as a contact for the enclosing support sleeve, which is expediently thin-walled and is supported opposite to a shoulder of the housing bore.
  • the enclosing, and designed in particular as a sleeve support preferably has, in particular before the initial assembly sufficient radial clearance to avoid even when going into the plastic region deformations of the support radial, acting on the insert clamping forces.
  • a total of a structure for an injection injector is achieved, in which the use of conditional by its attachment in the housing clamping forces is kept free as well as by the clamping of the injector forces.
  • This is associated with the advantage that the assembly of the injection injector, in particular the introduction of the insert forming a preassembled unit in the receiving bore of the housing due to the configuration of the support of the insert relative to the receiving bore no tight tolerances, as in connection with the tension of the nozzle part or counterpart against the housing for use the desired axial position to the nozzle part or counterpart due the yielding support to the housing results by itself.
  • the training of the insert with the seat and wide limits in the length of the application, whether z. B. by using seat pieces of different height or by frontal removal of material on each seat.
  • the wall thickness of the support sleeve makes up a fraction of the diameter of the insert, so that, for example, to a diameter of the insert, or the socket of the insert in the order of 10 - 15 mm a wall thickness of about 1 mm is given.
  • a design is useful for the support sleeve, which is at one to several times the diameter of the support sleeve, wherein the length of the support sleeve is two to four times its diameter represents a convenient Schlrelation.
  • a support sleeve and another spatially correspondingly usable Element are provided, which allow in a corresponding manner by elastic and / or elastoplastic compliance and / or deformability, the required power transmission.
  • the guide length of the insert, or of its sleeve relative to the housing adjacent to the counterpart, and thus with respect to the insertion of the insert in the housing, is suitably in the order of the diameter of the insert, the insert expires against the counterpart in an annular sealing surface which is formed by a seat assigned to the insert end side.
  • valve rod provided as a control is limited in its displacement by a stop collar with respect to a stop face of the insert, the stop collar preferably being an annular space associated with the insert, which is partially delimited by a cap-like, attached end portion of the insert.
  • a plate-shaped counterpart 5 to a control insert designed as insert 7 the housing 4 receives in a central axial bore 6.
  • the insert 7 is centrally penetrated by a control in the form of an elongated valve rod 8, which is arranged to act on a opposite to the nozzle part 2 on the housing 4 and only schematically illustrated actuator 9, which is preferably designed as a magnetic actuator.
  • the valve rod may be in one piece or consist of several sections.
  • the valve stem is formed of two pieces.
  • a rod part made of a carbide In the area of the sealing zone it is recommended to use a rod part made of a carbide because of the abrasive attacks of the fuel.
  • a rod part made of a material In the upper part, preferably a rod part made of a material is used which has the same coefficient of thermal expansion as the housing and the bushing 10 of the insert 7.
  • the guide can, as shown, take place in an upper and a lower bearing bush 10, wherein the lower bearing bush 10 can represent a guide for both rod parts.
  • an additional third bearing bush can be provided for the leadership of the lower, wear-resistant rod member. Axial offsets between the guides and the valve seat can be easily compensated for with separate guidance of the lower rod part.
  • the control insert 7 is shown in Fig. 2 enlarged.
  • the insert 7 comprises - as a prefabricated assembly unit which is to be inserted into the axial bore 6 - with a cylindrical basic shape a bushing 10, in the central bore 11 of which the valve rod 8 is displaceably guided via the bearing bushes 12.
  • the Counterpart 5 associated end of the sleeve 10 is centrally provided with an inserted seat 13, which contains in a known manner the seat for a valve member 8 associated closing member.
  • the closing member may be a separate from the valve rod 8 part such.
  • B. be a flat ball.
  • the seat piece 13 has a bore as part of a connecting channel 14, which continues in the counterpart 5 forming an insert.
  • the seat piece 13 thus forms a valve plate as the closing body of the control insert 7, which forms with the counterpart 5, a sealing channel 16 surrounding the connecting channel 16, which is closed with sufficient axial tension between the insert 7 and the counterpart 5.
  • a support sleeve 17 which is clamped between systems, one of which is remote from the counterpart 5 housing-side shoulder 18 and the Other is formed by a shoulder 19 on the outer circumference of the bush 10 of the control insert 7.
  • a shoulder 19 On the shoulder 19 follows in the direction of the counterpart 5, an enlarged diameter portion of the sleeve 10, which forms the radial guide 20 to the housing 4 for the control insert 7.
  • the support sleeve 17 is in contrast, which does not stand out in the drawing, with radial clearance to the circumference of the bush 10 of the control insert 7 and / or the corresponding region of the axial bore 6 of the housing 4 arranged such that, based on short upsetting paths, by upsetting the support sleeve 17 caused changes in the wall thickness of the support sleeve 17 no radial tension between the housing 4 and the insert 7 result.
  • the valve rod 8 is supported against an anchor rod 30 having a stop collar 21 which lies in an annular space 22 of the control insert 7, said annular space 22 between an end face of the socket 10 and a cap-like, screwed against the sleeve 10 and an extension of the sleeve 10 forming end portion 23 is located.
  • the end faces of the annular space 22 form Hubanelle, in particular the lower stroke stop also plays a damping function.
  • the anchor rod 30 is connected at its end projecting beyond the end part 23 with the armature plate 24 of the actuator designed as a magnetic actuator 9, which is screwed by mediating a spacer 25 the front side against the housing 4.
  • Fig. 1 further shows schematically the high-pressure port 26 of the injection injector 1 and partly its channel connection 27 to the nozzle needle 3 and the pressure chamber 28.
  • a control chamber 29 which in throttled connection to high-pressure side inlet is and which, which is only partially shown, via the channel 14 comprehensive, valve-controlled connection connection to the low pressure side to initiate the injection pressure is relieved.
  • control insert 7 forms a prefabricated assembly unit, which facilitates both the initial assembly as well as any repairs.
  • the necessary fitting of the control insert 7 as a mounting unit is by the use of a support sleeve 17 in the axial support of the control insert 7 relative to the housing. 4 much easier and requires in particular a much lower tolerated effort.
  • the inventively provided use of the material behavior to compensate for the tolerances means a significant simplification, especially in the inventive solution, a relatively large tolerance band is given and the axial positioning of the support sleeve as well as their length and the shoulders 18 and 19th easy to control.
  • the control insert 7 forms a prefabricated and thus also previously tested unit, which further improves the assembly safety and also offers the possibility of easy replacement of the wear-sensitive parts.
  • control insert 7 is mounted in the manner described above and secured via the support sleeve 17 as elastically and load-dependent optionally plastically deformable spring element regardless of given axial tolerances the necessary supporting force for sealing contact of the seat piece 13 on the counterpart 5, so needs to complete the assembly of the injection injector only the anchor plate 24 are connected to the outgoing to the valve rod 8 provided anchor rod 30, wherein the spacer disc 25 of the residual air gap for the actuating magnet 9 is set.
  • control insert 7 is an independent internal unit of the Injection injector 1 forms, which is radially supported against the housing 1 only in the region of the guide 20, but otherwise is not guided radially, remain other, acting on the injection injector 1 from the outside forces, in particular fastening forces, without effect on the set Einstellbergere, in particular on the control insert 7, whereby a precise function of the injection injector is ensured overall. Only the air gap between the armature plate 24 and magnetic base body can undergo a reduction in a compression of the injector 4, which is easily compensated by a suitable spacer 25.
  • the structural design of the support sleeve 17 depends on the supporting force, which is applied for the sealing in the sealing boundary 16, or after the support material on the material side for the support sleeve 17 corresponding voltage level.
  • the pressures to be controlled with injector injectors extend into the range of 2000 bar.
  • the drawing illustrates that relatively thin-walled support sleeves 17 are also sufficient for the control of such pressures or for applying corresponding support forces.
  • the illustrated steel support sleeve 17 has an outer diameter of the sleeve 10 of about 12 mm, a wall thickness of about 1 mm and is, with an axial length of about 40 mm, radially non-contact.

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  • 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)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Nonmetallic Welding Materials (AREA)

Claims (12)

  1. Injecteur pour moteurs à combustion interne, comprenant un boîtier (4) et une partie de buse fixée sur le boîtier (4) par vissage, et comprenant un insert (7) disposé dans un alésage axial du boîtier (4) et comprenant un élément de commande (8), l'insert (7) étant d'une part serré contre la partie de buse (2) fixée sur le boîtier ou contre une pièce conjuguée (5) montée avant la partie de buse (2),
    caractérisé en ce que
    l'insert (7) est serré d'autre part contre le boîtier (4) par le biais d'une gaine de support (17) supportée sur le boîtier (4) et sur l'insert (7) dans des épaulements (18, 19), laquelle est comprimée en longueur dans l'état monté.
  2. Injecteur selon la revendication 1,
    caractérisé en ce que
    la gaine de support (17) est comprimée dans la plage élastique dans l'état monté.
  3. Injecteur selon la revendication 1,
    caractérisé en ce que
    la gaine de support (17) est comprimée dans la plage élasto-plastique dans l'état monté.
  4. Injecteur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les points de serrage de l'insert (7) forment entre l'épaulement (19) et la partie de buse (2) ou la pièce conjuguée (5) un court serrage de l'insert (7).
  5. Injecteur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'insert (7) comprend une douille (10), une tige de soupape guidée en tant qu'élément de commande (8) dans la douille (10), une pièce de siège (13) du côté de la buse et, à l'extrémité opposée à la partie de buse (2), une partie d'extrémité qui est fixée sur la douille (10) et qui présente, conjointement avec la douille (10), des butées de levage pour un collet de butée (21) relié à la tige de soupape.
  6. Injecteur selon la revendication 5,
    caractérisé en ce que
    l'insert (7) forme une unité prémontée.
  7. Injecteur selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    l'insert (7) est réalisé sous forme cylindrique et en ce que la gaine de support (17) entoure l'insert (7) avec un jeu radial au moins avant le premier montage.
  8. Injecteur selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce que
    la gaine de support (17) présente, par rapport à l'alésage axial (6) du boîtier (4), un jeu radial au moins avant le premier montage.
  9. Injecteur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'insert (7) est prévu entre un actionneur (9) et une pièce conjuguée (5) située dans une transition à la partie de buse (2), et en ce que l'insert (7) forme, en cas de support axial de la pièce conjuguée (5) contre le boitier (4), avec la pièce conjuguée (5), une limite d'étanchéité (16) pour un conduit de liaison (14) entre l'insert (7) et la pièce conjuguée (5), l'insert (7) étant guidé radialement dans l'alésage axial (6) dans sa région voisine de la pièce conjuguée (5), tournée vers l'arrière par rapport à sa direction d'enfoncement dans l'alésage axial (6) et étant serré axialement contre la pièce conjuguée (5) par le biais de la gaine de support (17), qui s'étend en cas de jeu radial entre un épaulement d'appui (19) prévu du côté périphérique vers l'insert (7) et un épaulement d'appui (18) du côté du boîtier.
  10. Injecteur selon la revendication 9,
    caractérisé en ce que
    l'épaulement d'appui (19) pour la gaine (17), du côté de la douille, est formé dans la transition à la portion de guidage radiale (20).
  11. Injecteur selon la revendication 10,
    caractérisé en ce que
    la longueur axiale de la portion de guidage radiale (20) correspond approximativement au diamètre de l'insert (7) dans la région de la portion de guidage (20).
  12. Injecteur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la partie de buse (2) est serrée par le biais d'un écrou de buse (31) contre le boîtier (4), la longueur de l'emprise de l'écrou de buse (31) sur le boîtier (4) correspondant à la longueur de la portion de guidage radiale (20) de l'insert (7) dans le boîtier (4).
EP03001751A 2002-03-18 2003-01-28 Injecteur pour moteurs à combustion interne Expired - Lifetime EP1347168B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10212002 2002-03-18
DE2002112002 DE10212002C1 (de) 2002-03-18 2002-03-18 Einspritzinjektor für Brennkraftmaschinen
DE10259544 2002-12-19
DE10259544 2002-12-19

Publications (3)

Publication Number Publication Date
EP1347168A2 EP1347168A2 (fr) 2003-09-24
EP1347168A3 EP1347168A3 (fr) 2005-01-05
EP1347168B1 true EP1347168B1 (fr) 2006-03-29

Family

ID=27789744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03001751A Expired - Lifetime EP1347168B1 (fr) 2002-03-18 2003-01-28 Injecteur pour moteurs à combustion interne

Country Status (3)

Country Link
EP (1) EP1347168B1 (fr)
AT (1) ATE321946T1 (fr)
DE (1) DE50302779D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007025050B3 (de) * 2007-05-29 2008-10-16 L'orange Gmbh Hochdruck-Einspritzinjektor für Brennkraftmaschinen mit einer knicklaststeigernden Steuerstangenabstützung über unter Hochdruck stehendem Kraftstoff

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004022958A1 (de) * 2004-05-10 2005-12-22 Siemens Ag Kraftstoffinjektor mit einer korrigierbaren Einstellung eines Leerhubs einer Aktoreinheit
AT500889B8 (de) * 2004-08-06 2007-02-15 Bosch Gmbh Robert Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59606610D1 (de) * 1995-06-02 2001-04-26 Ganser Hydromag Ag Zuerich Brennstoffeinspritzventil für Verbrennungskraftmaschinen
DE19524520A1 (de) 1995-07-05 1997-01-09 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19820341C2 (de) * 1998-05-07 2000-04-06 Daimler Chrysler Ag Betätigungsvorrichtung für eine Hochdruck-Einspritzdüse für flüssige Einspritzmedien
DE19938921B4 (de) 1999-08-17 2004-02-19 L'orange Gmbh Einspritzventil für eine Verbrennungskraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007025050B3 (de) * 2007-05-29 2008-10-16 L'orange Gmbh Hochdruck-Einspritzinjektor für Brennkraftmaschinen mit einer knicklaststeigernden Steuerstangenabstützung über unter Hochdruck stehendem Kraftstoff

Also Published As

Publication number Publication date
EP1347168A2 (fr) 2003-09-24
ATE321946T1 (de) 2006-04-15
DE50302779D1 (de) 2006-05-18
EP1347168A3 (fr) 2005-01-05

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