EP1102931A1 - Soupape d'injection de carburant et son procede de production - Google Patents

Soupape d'injection de carburant et son procede de production

Info

Publication number
EP1102931A1
EP1102931A1 EP00909052A EP00909052A EP1102931A1 EP 1102931 A1 EP1102931 A1 EP 1102931A1 EP 00909052 A EP00909052 A EP 00909052A EP 00909052 A EP00909052 A EP 00909052A EP 1102931 A1 EP1102931 A1 EP 1102931A1
Authority
EP
European Patent Office
Prior art keywords
valve
connecting part
valve housing
fuel injection
connection
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
EP00909052A
Other languages
German (de)
English (en)
Other versions
EP1102931B1 (fr
Inventor
Waldemar Hans
Johann Bayer
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 EP1102931A1 publication Critical patent/EP1102931A1/fr
Application granted granted Critical
Publication of EP1102931B1 publication Critical patent/EP1102931B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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

Definitions

  • the invention is based on a fuel injection valve according to the preamble of claims 1 and 3.
  • an electromagnetically actuated fuel injection valve with a valve housing which partially encloses a fuel inlet connector and a valve seat support.
  • the valve seat support has a valve seat surface which cooperates with a valve closing body which can be actuated by means of a valve needle to form a sealing seat.
  • a desired valve stroke to achieve a required amount of fuel, measured in the open valve state between the valve closing body and the valve seat surface, is set by interposing a stroke adjusting disc in the axial direction between a stop plate and an end face of the valve seat carrier. After adjustment, the valve housing and the valve seat carrier are connected to one another by crimping an end section of a cylindrical holding section of the valve housing around the valve seat carrier.
  • this configuration has the following disadvantages: Since the flanging force resulting from the flanging can only be approximately predetermined by the flanging process by flanging the end section of the cylindrical holding section of the valve housing around the valve seat support, the tension generated between the valve seat support and the valve housing cannot be specified. In addition, the flanging is achieved by plastic deformation of the end section of the cylindrical holding section of the valve housing, which is subject to aging, as a result of which the connecting force between the valve housing and the valve seat carrier decreases.
  • the fuel injector according to the invention with the characterizing features of claim 1 or claim 3 has the advantage that the axial tension between the valve housing and valve seat support can be predetermined and the connection can be made in simple and cost-saving steps.
  • the connection is also resistant to aging, which increases the service life of the fuel injector.
  • the cutout is advantageously in the form of a circumferential groove on a lateral surface of the valve seat carrier formed, which results in a high strength of the flange connection.
  • a support ring is advantageously provided between the spring element and the flanged valve housing. This ensures a uniform transmission of force from the flanged connection to the spring element and also protects the spring element from external influences.
  • the bundle connection has a plurality of exchange segments which are circumferentially offset with respect to one another with respect to a valve axis and on which the valve housing is connected to the valve seat support in each case to form a crimped partial connection while leaving uncrimped sections free. This can further simplify the production of the flare connection.
  • a stroke adjusting disk is advantageously provided between the valve housing and the valve seat carrier.
  • the stroke of the valve needle can be adjusted with the stroke adjusting disc.
  • the manufacturing method according to the invention with the features of claim 9 or claim 10 has the advantage of being inexpensive and automatable.
  • a support ring is introduced into the space formed between the valve seat support and the valve housing after the assembly.
  • the spring element can be clamped more easily and is stressed more uniformly.
  • the spring element is advantageously pretensioned by the action of a tubular pretensioning tool guided around the valve seat carrier. The preloading tool results in a considerably simplified production process.
  • the axial depth of insertion of the valve seat carrier into the valve housing is adjusted by a stroke adjusting disc for adjusting the stroke of the valve needle. This makes it possible to compensate for a difference in a valve needle length of the valve needle from a desired length.
  • Fig. 1 shows an axial section through a first embodiment of an inventive
  • Fig. 2 shows the detail II in Fig. 1 before manufacture of the
  • Fig. 3 shows the detail II in Fig. 1 after the manufacture of
  • FIG. 4 shows an excerpted axial section through a second exemplary embodiment of a fuel injection valve according to the invention before the flared connection is produced;
  • FIG. 5 shows the embodiment shown in FIG. 4 after the flared connection has been produced
  • Fig. 6 is a partial axial section through a third embodiment of a Fuel injector according to the invention before producing the flare connection;
  • FIG. 7 shows the exemplary embodiment shown in FIG. 6 after the flared connection has been produced.
  • FIG. 8 shows a section along the line VIII-VIII in FIG. 7.
  • the fuel injection valve 100 is designed here as an internal opening fuel injection valve 100.
  • the fuel injection valve 100 is used in particular for the direct injection of fuel, in particular gasoline, into a combustion chamber of a mixture-compressing spark-ignition internal combustion engine as a so-called gasoline direct injection valve.
  • the fuel injector 100 according to the invention is also suitable for other applications.
  • the fuel injection valve 100 has a tubular connecting part in the form of a valve seat support 1 with a spray opening 2.
  • the injection opening 2 inserted into a cylinder head of the internal combustion engine is sealed off from the outside by means of a sealing ring 3.
  • a valve seat support 1 instead of a valve seat support 1, other connection parts, which partially form the housing of the valve, are also conceivable, which according to the invention have a valve housing 20. Flares are firmly connected.
  • the valve seat support 1 has an axial longitudinal bore 4 which receives an axially movable valve needle 5.
  • a valve seat surface 6 is formed on the valve seat support 1, which cooperates with a truncated cone-shaped valve closing body 7, which tapers downstream, to form a sealing seat.
  • the valve closing body 7 is formed in one piece with the valve needle 5.
  • the valve seat surface 6 can also be formed on a separate valve seat body which is received by the valve seat carrier 1 and connected to it.
  • the valve needle 5 On the side of the valve closing body 7 facing away from the sealing seat, the valve needle 5 has a cylindrical section 8, on the lateral surface of which one or more spiral-shaped swirl grooves 9 are provided.
  • the swirl grooves 9 are closed in the radial direction by the valve seat support 1 surrounding the cylindrical section 8 and extend from a fuel chamber 10, which is part of the axial longitudinal bore 4 of the valve seat support 1, to an eating point 11 in the region of the valve seat surface 6 Swirl grooves 9 generate a swirl flow which favors the swirling and thus the atomization of the fuel.
  • the fuel chamber 10 is delimited upstream by a guide section 12 and is connected via outlet openings 13 to an axial cavity 14, which penetrates the upstream region of the valve needle 5.
  • the valve needle 5 is connected to an armature 15.
  • the armature 15 interacts with a solenoid 16 for closing and opening the fuel injector 100.
  • a coil body 17 stepped in the radial direction receives the winding of the magnetic coil 16.
  • the stepped coil former 17 surrounds a core 18 serving as an inner pole and, with a larger diameter step, a non-magnetic intermediate part 19 at least partially axially.
  • Both the armature 15 and the core 18 and the outer valve housing 20 are made of a ferromagnetic material.
  • a closed magnetic flux circuit is formed by the core 18, the armature 15 and the valve housing 20, the armature 15 being electrical Excitation of the magnetic coil 16 is drawn in the direction of the core 18.
  • the valve needle 5 is moved counter to the restoring force caused by a restoring spring 21, which causes the fuel injector to open.
  • the return spring 21 is supported on a support plate 25.
  • a supply cable 22 serves for the electrical supply of the magnetic coil 16 and is connected to the valve housing 20 via a cable receptacle 23.
  • the armature 15 strikes with an armature stop surface 33 on the end face of the core 18 facing the spray direction 2.
  • the valve seat carrier 1 has a cutout 40 in the form of a circumferential groove into which the valve housing 20 is crimped, as a result of which the valve housing 20 is braced axially against the valve seat carrier 1.
  • the recess 40 is located on the outer circumference of the valve seat support 1 in an area in which the valve housing 20 abuts with a lower end area.
  • the valve seat support 1 has a further circumferential groove 41, in which a sealing ring 42 is inserted. The sealing ring 42 is pressed on a surface 43 formed on the valve housing 20 into the circumferential groove 41 in order to seal the interior of the fuel injection valve 100 from the outside.
  • a stroke adjustment disk 46 is provided between a stop surface 45 formed on a stop 44 and the support plate 25, the axial insertion depth of the valve seat support 1 in the valve housing 20 being adjusted by the stroke adjustment disk 46.
  • the core 18 of the fuel injection valve 100 has a fuel nozzle 50 in which an internal thread 51 is formed. Fuel is supplied via a fuel hose 52, which is screwed into the internal thread 51 of the fuel connector 50 via a screw element 53 is. A sealing element 54, which is made of fuel-resistant material, is provided between the screw element 53 and the fuel nozzle 50 to seal the screw connection.
  • valve housing 20 and valve seat support 1 The flare connection shown in FIG. 1 between valve housing 20 and valve seat support 1 and alternative embodiments thereof are described with reference to the following figures.
  • Fig. 2 shows a sectional view of the section designated II in Fig. 1.
  • the stroke adjusting disk 46 is introduced into the valve housing 20 in order to set a valve needle stroke of the valve needle 5.
  • the stroke adjusting disc 46 lies: surface 45 of the stop 44 on the stop.
  • the sealing ring 42 is introduced, which in this exemplary embodiment has a cross-sectional area adapted to the groove 41.
  • the valve seat support 1 is inserted into the valve housing 20, the valve seat support 1 striking against the stop surface 45 of the stop 44 via the support plate 25 and the stroke adjusting disk 46.
  • the valve housing 20 has a radially outwardly projecting material bead 70 which has an average axial distance d from the circumferential recess 40 formed in the valve seat carrier 1.
  • an outer surface 71 of the material bead 70 is covered by a suitable z. B. tubular crimping tool, so that the valve housing 20 is plastically deformed and in the region of an over the circumferential recess 40 formed inner surface 72 of the valve housing 20, a projection 73 formed in cross-section nose-shaped according to: Fig. 3 results.
  • the nose-shaped projection 73 shown in FIG. 3 engages behind a contact surface 74 of the valve seat carrier 1, whereby displacement of the valve seat carrier 1 with respect to the valve housing 20 is prevented.
  • the average distance d between the material bead 70 and the circumferential recess 40 results in an axial bracing of the valve housing 20 with respect to the valve seat support 1 after the material bead 70 is crimped, the nose-shaped projection 73 axially pressing the valve seat support 1 against the stop surface 45 of the stop 44.
  • the sealing ring 42 is acted upon radially in the flange connection according to the invention, which improves the seal between the valve housing 20 and the valve seat support 1.
  • recesses 40 of a different design can also be provided, in order, for. B. to enable a loosening of the Börde1 connection.
  • the support plate 25 can be omitted or interchanged with the stroke adjusting disk 46.
  • a spring element 61 is introduced into an intermediate space 60 formed between the valve seat carrier 1 and the valve housing 20.
  • the space 60 results from a stepped outer contour of the valve seat carrier 1.
  • the spring element 61 is preferably designed as a spring ring or as a plate spring.
  • a support ring 62 is also introduced, via which the spring element 61 is preloaded.
  • the spring element 61 is preferably pretensioned by the action of a tubular one guided over the valve seat support 1 Pretensioning tool which engages on the support ring 62 on a radially inner annular surface 63 of an end face 64 of the support ring 62 facing away from the spring element 61.
  • Pretensioning tool which engages on the support ring 62 on a radially inner annular surface 63 of an end face 64 of the support ring 62 facing away from the spring element 61.
  • a seal-side section 65 of the valve housing 20 is flanged in the direction of the valve seat support 1, which results in the flare connection shown in FIG. 5.
  • the spring element 61 generates an axial tension between the valve housing 20 and the valve seat support 1 via the support ring 62. Regardless of the shape of the flanged sealing seat-side section 65 of the valve housing 20, the support ring 62 causes the spring element 61 to bear against a spring element 61 End face 75 given. In addition, without the use of a support ring 62, there is a risk that the spring element 61 will be damaged or jammed when the sealing seat-side section 65 of the valve housing 20 is flanged.
  • FIGS. 6, 7 and 8 show a further exemplary embodiment of the invention
  • Fuel injector 100 shown. 6 and 7 each show a partial axial section of the section designated II in FIG. 1.
  • FIG. 8 shows the section designated VIII in FIG. 7.
  • the section 65 of the valve housing 20 on the sealing seat side has a greater wall thickness.
  • the resulting flare connection can evenly "over the
  • the entire circumference of the sealing seat-side section 65 of the valve housing 20 may be formed, or, as in the exemplary embodiment shown, it may have a plurality of flange segments 66a to 66e which are circumferentially offset with respect to a valve axis 67, the valve housing 20 with the flange segments 66a to 66e Valve seat support 1 is each connected by a flanged part connection, leaving unflared sections 68a to 68d.
  • This type of flare connection has the advantage that the tensions between the flare segments 66a to 66e are reduced by unflared sections 68a to 68d compared to a circumferential flare and the occurrence of cracks in the sealing seat-side section 65 of the valve housing 20 is avoided.
  • the fuel injection valve 100 can also be designed as an externally opening fuel injection valve 100.
  • the described bundle connection between valve housing 20 and valve seat support 1 is also suitable for other connections, in particular the connection of valve housing 2 and core 18.
  • the elements described can be arranged in a way that is different from the examples shown.
  • the spring element 61 can also be arranged on the side of the stop surface 45, as a result of which the spring element 61 can also be used in the embodiments described for FIGS. 1 to 3.

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)

Abstract

L'invention concerne une soupape d'injection de carburant (100), notamment une soupape d'injection de systèmes d'injection de carburant de moteurs à combustion interne. Cette soupape d'injection (100) présente un corps obturateur de soupape (7) qui est actionné par un pointeau (5) et qui coopère par une surface de siège (6) aménagée sur un support de siège (1) avec un siège d'étanchéité. Cette soupape présente également un boîtier de soupape (20) abritant partiellement le support de siège de soupape (1). Le boîtier de soupape (20) est relié au support de siège de soupape (1) par une liaison d'emboutissage réalisée par déformation axiale.
EP00909052A 1999-06-08 2000-02-22 Soupape d'injection de carburant et son procede de production Expired - Lifetime EP1102931B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19925984A DE19925984A1 (de) 1999-06-08 1999-06-08 Brennstoffeinspritzventil und Verfahren zu dessen Herstellung
DE19925984 1999-06-08
PCT/DE2000/000487 WO2000075503A1 (fr) 1999-06-08 2000-02-22 Soupape d'injection de carburant et son procede de production

Publications (2)

Publication Number Publication Date
EP1102931A1 true EP1102931A1 (fr) 2001-05-30
EP1102931B1 EP1102931B1 (fr) 2005-05-18

Family

ID=7910478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00909052A Expired - Lifetime EP1102931B1 (fr) 1999-06-08 2000-02-22 Soupape d'injection de carburant et son procede de production

Country Status (4)

Country Link
EP (1) EP1102931B1 (fr)
JP (1) JP2003501584A (fr)
DE (2) DE19925984A1 (fr)
WO (1) WO2000075503A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0306008D0 (en) 2003-03-15 2003-04-23 Qinetiq Ltd Optical device
US20060215954A1 (en) 2004-03-22 2006-09-28 Jenkins Richard M Optical routing device comprising hollow waveguides and mems reflective elements
GB0306634D0 (en) 2003-03-22 2003-04-30 Qinetiq Ltd Optical wavelength division multiplexer/demultiplexer device
DE102017213454A1 (de) * 2017-08-03 2019-02-07 Robert Bosch Gmbh Verfahren zur Herstellung eines Dosierventils, Dosierventil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936332A1 (de) * 1979-09-08 1981-03-26 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzventil und verfahren zur herstellung eines kraftstoffeinspritzventiles
DE3540660A1 (de) * 1985-11-16 1987-05-21 Bosch Gmbh Robert Elektromagnetisch betaetigbares kraftstoffeinspritzventil
JP2515758B2 (ja) * 1986-10-29 1996-07-10 株式会社日立製作所 電磁式燃料噴射弁装置の製造方法
US4887769A (en) * 1987-06-26 1989-12-19 Hitachi, Ltd. Electromagnetic fuel injection valve
US5236173A (en) * 1992-03-11 1993-08-17 Siemens Automotive L.P. Armature bounce damper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0075503A1 *

Also Published As

Publication number Publication date
JP2003501584A (ja) 2003-01-14
DE50010343D1 (de) 2005-06-23
WO2000075503A1 (fr) 2000-12-14
DE19925984A1 (de) 2000-12-14
EP1102931B1 (fr) 2005-05-18

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