EP2795092B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP2795092B1
EP2795092B1 EP12778320.7A EP12778320A EP2795092B1 EP 2795092 B1 EP2795092 B1 EP 2795092B1 EP 12778320 A EP12778320 A EP 12778320A EP 2795092 B1 EP2795092 B1 EP 2795092B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
grooves
pressing
region
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.)
Active
Application number
EP12778320.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2795092A1 (de
Inventor
Marc-Jean Derenthal
Johann Bayer
Ralph Ittlinger
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 EP2795092A1 publication Critical patent/EP2795092A1/de
Application granted granted Critical
Publication of EP2795092B1 publication Critical patent/EP2795092B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • F02M51/0682—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 the body being hollow and its interior communicating with the fuel flow
    • 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
    • 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
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a fuel injection valve which comprises an electromagnetic actuator with a magnetic coil, with an inner pole and with an outer magnetic circuit component and a movable valve closing body, which cooperates with a valve seat body associated valve seat.
  • the valve seat body and the inner pole are arranged in an inner opening of a thin-walled valve sleeve and the magnet coil and the outer magnetic circuit component on the outer circumference of the valve sleeve.
  • the magnetic circuit component formed in the form of a magnet pot is first pushed onto the valve sleeve, then the valve seat body pressed into the inner opening of the valve sleeve, so that solely by pressing in the valve seat body a firm connection of the valve sleeve and magnetic circuit component is achieved.
  • the inner pole is subsequently fixed by pressing in the valve sleeve.
  • the fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage that it is inexpensive to produce in a particularly simple manner.
  • the fixed press connection of at least two metallic components of the fuel injection valve is characterized in that at least one of the component partners has at least two successive zones or partial zones in its pressing region, which have a structure with grooves, wherein the profile depth of the grooves of individual zones or partial zones different.
  • press connections between metallic component partners are manufacturable that hold securely and reliably over a long period of time while avoiding cold welding and tight.
  • the press connections are very simple and inexpensive to manufacture, since advantageously known and usually necessary separate operations, such as coating or oiling for improved joining of the component partners or heating of the component partners can be dispensed with for shrinking.
  • the pressing area of a component partner is successively composed of an insertion bevel, a cylindrical pressing section and a welding area, wherein the largest profile depth of the grooves is then produced in the area of the lead-in chamfer and the smallest profile depth of the grooves in the welding area located on the opposite side of the pressing section.
  • the pressing section may have a zone of substantially the same profile depth or a plurality of partial zones of different profile depth.
  • FIG. 1 a fuel injection valve according to the prior art
  • FIG. 2 a detailed view of a valve sleeve
  • FIG. 3 a detailed view of a connection pipe
  • FIG. 4 a detailed view of a connection pipe before profiling according to the invention
  • FIG. 5 a detailed view of an alternative connection pipe before profiling according to the invention
  • FIG. 6 a detailed view of a connecting pipe with a first profiling according to the invention
  • FIG. 7 a section of the view according to FIG. 6 with a disturbing paragraph to avoid
  • FIG. 8 a detailed view of a connecting pipe with a second profiling according to the invention in a mounting situation in a valve sleeve.
  • FIG. 1 a fuel injection valve according to the prior art explained with its basic components.
  • electromagnetically actuated valve in the form of an injection valve for fuel injection systems of mixture-compressing, spark-ignition internal combustion engines has a largely surrounded by a magnetic coil 1, serving as réellepol and partially as a fuel flow largely tubular core 2.
  • the magnetic coil 1 is of an outer, sleeve-shaped and stepped running , z.
  • the magnetic coil 1, the core 2 and the valve shell 5 together form an electrically excitable actuator.
  • solenoid coil 1 While embedded in a bobbin 3 solenoid coil 1 surrounds a valve sleeve 6 from the outside, the core 2 in an inner, concentric with a valve longitudinal axis 10 extending opening 11 of the valve sleeve 6 is introduced.
  • the e.g. Ferritic valve sleeve 6 is stretched long and thin-walled.
  • the opening 11 also serves as a guide opening for a valve needle 14 which is axially movable along the valve longitudinal axis 10.
  • the valve sleeve 6 extends in the axial direction, e.g. over more than half the total axial extent of the fuel injector.
  • valve seat body 15 is further arranged in the opening 11, which is fastened to the valve sleeve 6, for example by means of a weld 8.
  • the valve seat body 15 has a fixed valve seat surface 16 as a valve seat.
  • the valve needle 14 is formed for example by a tubular anchor portion 17, a likewise tubular needle portion 18 and a spherical valve closing body 19, wherein the valve closing body 19 is connected for example by means of a weld fixed to the needle portion 18.
  • a cup-shaped spray perforated disk 21 is arranged, whose bent and circumferentially encircling retaining edge 20 is directed against the flow direction upwards.
  • valve seat body 15 and spray disk 21 The solid connection of the valve seat body 15 and spray disk 21 is z. B. realized by a circumferential tight weld.
  • armature portion 17 in an inner longitudinal bore 23 fuel passing outwards and on the valve closing body 19, for. can flow along flats 24 to the valve seat surface 16 along.
  • the actuation of the injection valve takes place in a known manner electromagnetically.
  • the electromagnetic circuit with the solenoid coil 1, the inner core 2, the outer valve shell 5 and the anchor portion 17 is used Anchor portion 17 is aligned with the valve closing body 19 facing away from the end of the core 2.
  • the spherical valve closing body 19 cooperates with the valve seat surface 16 of the valve seat body 15, which tapers in the direction of the flow in the direction of flow and which is formed in the axial direction downstream of a guide opening in the valve seat body 15.
  • the spray perforated disc 21 has at least one, for example, four ejection openings 27 formed by erosion, laser drilling or punching.
  • the insertion depth of the core 2 in the injection valve is decisive for the stroke of the valve needle 14.
  • the one end position of the valve needle 14 is fixed in the non-energized magnetic coil 1 by the contact of the valve closing body 19 on the valve seat surface 16 of the valve seat body 15, while the other End position of the valve needle 14 results in energized solenoid coil 1 by the system of the anchor portion 17 at the downstream end of the core.
  • the stroke is adjusted by an axial displacement of the core 2, for example, produced by a machining process such as turning, which is subsequently connected firmly to the valve sleeve 6 according to the desired position.
  • an adjustment in the form of an adjusting sleeve 29 is inserted.
  • the adjusting sleeve 29 serves to adjust the spring bias of the voltage applied to the adjusting sleeve 29 return spring 25, which in turn is supported with its opposite side to the valve needle 14, wherein an adjustment of the dynamic Abspritzmenge with the adjusting sleeve 29.
  • a fuel filter 32 is disposed above the adjusting sleeve 29 in the valve sleeve 6.
  • the injector described so far is characterized by its particularly compact design, so that a very small, handy injection valve is created.
  • These components form a preassembled independent assembly, which is called function part 30 below.
  • the functional part 30 thus essentially comprises the electromagnetic circuit 1, 2, 5 and a sealing valve (valve closing body 19, valve seat body 15) with a subsequent jet treatment element (spray perforated disk 21) and as the base body, the valve sleeve. 6
  • connection part 40 is characterized above all by the fact that it comprises the electrical and the hydraulic connection of the fuel injection valve.
  • the largely executed as a plastic part connector 40 therefore has a serving as a fuel inlet nozzle tubular body 42.
  • a concentric to the valve longitudinal axis 10 extending flow bore 43 of an inner connecting pipe 44 in the base body 42 serves as a fuel inlet and is flowed through from the inflow end of the fuel injection valve in the axial direction of the fuel ,
  • a hydraulic connection of connecting part 40 and functional part 30 is achieved in the fully assembled fuel injection valve in that the flow holes 43 and 28 of both modules are brought to each other so that an unimpeded flow through the fuel is ensured.
  • a lower end 47 of the connecting tube 44 protrudes into the opening 11 of the valve sleeve 6 in order to increase the stability of the connection.
  • the main body 42 made of plastic can be sprayed onto the functional part 30 so that the plastic immediately surrounds parts of the valve sleeve 6 and of the valve jacket 5.
  • a secure seal between the functional part 30 and the main body 42 of the connecting part 40 is achieved, for example, via a labyrinth seal 46 on the circumference of the valve jacket 5.
  • To the base body 42 includes a mitangespritzter electrical connector 56. At its opposite end of the connector 56, the contact elements with the solenoid coil 1 are electrically connected.
  • FIGS. 2 to 8 metallic components of the fuel injection valve are shown, which are fixedly connected to at least one other metallic component by means of pressing.
  • the components valve sleeve 6 and connecting pipe 44 which should be emphasized that the illustrated and described inventive measures are adequately transferable to all pressing areas of two metallic components in the fuel injector.
  • press fits between the two components to be fastened are appropriate.
  • press fits generally lead to compressions or strains of a plastic or elastic nature in the components, depending on the tolerance position, material and component geometry. Due to their rigidity, the component partners can not stretch or compress, or they are too soft in their material, eg soft magnetic chromium steels, it is very likely to cold welds ("eaters") during the joining process of the pressing.
  • the installation conditions of the component partners If the press connection, for example, in the installed state subjected to an internal pressure, so this can lead to strains and widening. Again, there is a risk of loosening the press connection and in the worst case of loosening the connection. To prevent this, therefore, the largest possible pressure should be generated, which in turn increases the tendency of the components to cold welding.
  • costly, precise and costly machining processes such as fine grinding or honing, the tolerances can be narrowed and press joints improved.
  • the aim is to produce as cost-effective components that are provided as turned parts, press connections between metallic component partners that hold securely and reliably over a long period of time while avoiding cold welding and tight.
  • the press connections should be made very simple and inexpensive, which is why a separate operation of coating or oiling or heating of the component partners is omitted for shrinking.
  • FIG. 2 an example of a thin-walled valve sleeve 6 is shown, which extends over a large part of the axial length of the fuel injection valve and in which the connecting pipe 44 ( FIG. 3 ) in a region a and the core 2 can be pressed in a region b and to which the valve jacket 5 can be pressed in a region c.
  • the connecting pipe 44 correspondingly has an outer pressing area a ', which corresponds to the area a in the installed state in the valve sleeve 6 to a press connection.
  • a and a ' are characterized areas that come in principle for a material contact in the press connection in question; however, it does not have to span the entire length of a and a ' the press connection come about, as based on the FIGS. 4 to 8 will be explained.
  • the connecting pipe 44 should be installed in the valve sleeve 6 with the lowest possible insertion force.
  • inlet fillets 59 in the transition of the pressing area a 'to the axially following on both sides sections are inventively modified before.
  • FIG. 4 shows a detailed view of a connecting pipe 44 before a profiling according to the invention. It becomes clear that the pressing area a 'on the connection pipe 44 is subdivided into three zones.
  • the zone I is characterized by a Ein Industriesfase 50, which is designed either as obliquely inclined or slightly curved performed annular circumferential material reduction. This Ein Industriesfase 50 serves the safe, centered and spanverhindernden introduction of the component to be pressed component 6, 44 into each other.
  • Zone II is followed by zone II, which forms the actual cylindrical pressing section 51.
  • This cylindrical pressing section 51 is followed on the side opposite the insertion chamfer 50 by a zone III which, like the insertion chamfer 50, is withdrawn and defines a welding region 52.
  • the welding region 52 extends at an angle ⁇ obliquely inclined back from the outer surface of the cylindrical pressing portion 51. The angle ⁇ is about 1 ° to 5 °.
  • FIG. 5 shows a detailed view of an alternative connection pipe 44 before profiling according to the invention.
  • the zone III is set back abruptly relative to the zone II serving as pressing section 51 via a shoulder 53, so that the outer jacket surface of the welding region 52 with a smaller outside diameter runs predominantly parallel to the outer circumferential surface of the cylindrical pressing section 51.
  • connection pipe 44 in the valve sleeve 6 this profiling of the pressing area a ' is a very effective measure to avoid the unwanted effect described above.
  • the two components 6, 44 are additionally secured and sealed against one another by means of a material-bonding joining method, such as welding or laser welding, then the profiling in the pressing region a 'may not be fully effective.
  • the welding depth in the welding area 52 Eg, about 0.8 to 1.2 mm.
  • a variable tread depth of the groove-like grooves 61 in the zones I, II, III of the pressing area a ' is provided, whereby a low-pore welding is made possible.
  • FIG. 6 is a detailed view of a connecting tube 44 shown with a first profiling according to the invention.
  • set back welding area 52 (zone III) is the lowest profile depth.
  • the profile depth of the grooves 61 in the pressing section 51 (zone II) may correspond to that of zone II or be slightly larger.
  • the zone I with the chamfer 50 has the area of grooves 61 which have the largest profile depth.
  • FIG. 7 shows a section of the view according to FIG. 6 with an unavoidable disturbing paragraph 55 or any other erratic increase.
  • groove-like grooves 61 are not shown to scale with their profile depths, but are clearly oversubscribed for a better understanding of the invention.
  • FIG. 8 is a detailed view of a connecting pipe 44 with a second profiling according to the invention in a mounting situation in a valve sleeve 6 is shown.
  • the middle cylindrical pressing section 51 is subdivided into two subzones IIa and IIb. While the grooves 61 of the first partial zone IIa still have the same profile depth as the grooves 61 of the lead-in chamfer 50, the grooves 61 of the partial zone IIb of the pressing section 51 have fewer deep grooves 61 whose low profile depth then extends as far as the welding area 52 continues.

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  • 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)
EP12778320.7A 2011-12-20 2012-10-23 Brennstoffeinspritzventil Active EP2795092B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011089247A DE102011089247A1 (de) 2011-12-20 2011-12-20 Brennstoffeinspritzventil
PCT/EP2012/070915 WO2013091936A1 (de) 2011-12-20 2012-10-23 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP2795092A1 EP2795092A1 (de) 2014-10-29
EP2795092B1 true EP2795092B1 (de) 2015-12-30

Family

ID=47076219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12778320.7A Active EP2795092B1 (de) 2011-12-20 2012-10-23 Brennstoffeinspritzventil

Country Status (9)

Country Link
US (1) US9822749B2 (ja)
EP (1) EP2795092B1 (ja)
JP (1) JP6077564B2 (ja)
KR (1) KR102048190B1 (ja)
CN (1) CN104011367B (ja)
BR (1) BR112014014910A2 (ja)
DE (1) DE102011089247A1 (ja)
IN (1) IN2014CN04440A (ja)
WO (1) WO2013091936A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6355765B2 (ja) * 2015-01-30 2018-07-11 日立オートモティブシステムズ株式会社 燃料噴射弁
DE102015217673A1 (de) 2015-09-15 2017-03-16 Continental Automotive Gmbh Einspritzvorrichtung zur Zumessung eines Fluids und Kraftfahrzeug mit einer derartigen Einspritzvorrichtung
WO2017109886A1 (ja) * 2015-12-24 2017-06-29 日立オートモティブシステムズ株式会社 電磁弁及びその製造方法
US10502112B2 (en) * 2017-09-14 2019-12-10 Vitesco Technologies USA, LLC Injector for reductant delivery unit having fluid volume reduction assembly
US10947880B2 (en) 2018-02-01 2021-03-16 Continental Powertrain USA, LLC Injector for reductant delivery unit having fluid volume reduction assembly
CN108447647B (zh) * 2018-04-16 2023-07-11 浙江工业大学 一种基于电励磁的湿式四磁柱式电磁铁

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3105671A1 (de) * 1981-02-17 1982-09-02 Robert Bosch Gmbh, 7000 Stuttgart "kraftstoffeinspritzduese"
US4938193A (en) * 1987-06-15 1990-07-03 Stanadyne Automotive Corp. Fuel injection nozzle
US5498263A (en) 1994-06-28 1996-03-12 Acromed Corporation Transverse connector for spinal column corrective devices
DE19900405A1 (de) 1999-01-08 2000-07-13 Bosch Gmbh Robert Verfahren zur Montage einer Ventilbaugruppe eines Brennstoffeinspritzventils
DE10044933A1 (de) * 2000-09-12 2002-03-21 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10103933A1 (de) * 2001-01-30 2002-08-14 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10334785A1 (de) * 2003-07-30 2005-02-24 Robert Bosch Gmbh Brennstoffeinspritzventil und Verfahren zu dessen Montage
WO2005066487A1 (de) * 2004-01-12 2005-07-21 Siemens Aktiengesellschaft Verfahren zum festziehen einer düsenspannmutter eines injektors für die kraftstoffeinspritzung sowie injektor und düsenspannmutter
DE102005025953A1 (de) * 2005-06-06 2006-12-07 Siemens Ag Einspritzventil und Ausgleichselement für ein Einspritzventil
DE102007008863A1 (de) * 2005-08-26 2008-08-28 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005040363B4 (de) 2005-08-26 2017-09-14 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
DE202008004065U1 (de) * 2008-03-25 2008-06-12 Robert Bosch Gmbh Hochdruckabdichtung
US7766254B2 (en) * 2008-05-30 2010-08-03 Delphi Technologies, Inc. Heated fuel injector
US7886718B2 (en) * 2008-09-26 2011-02-15 Caterpillar Inc. Fuel injector having integral body guide and nozzle case for pressure containment

Also Published As

Publication number Publication date
JP6077564B2 (ja) 2017-02-08
EP2795092A1 (de) 2014-10-29
KR102048190B1 (ko) 2019-11-25
KR20140104445A (ko) 2014-08-28
US9822749B2 (en) 2017-11-21
CN104011367A (zh) 2014-08-27
US20150041567A1 (en) 2015-02-12
CN104011367B (zh) 2017-07-18
IN2014CN04440A (ja) 2015-09-04
DE102011089247A1 (de) 2013-06-20
JP2015500947A (ja) 2015-01-08
WO2013091936A1 (de) 2013-06-27
BR112014014910A2 (pt) 2017-06-13

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