EP0675283A1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

Info

Publication number
EP0675283A1
EP0675283A1 EP95103810A EP95103810A EP0675283A1 EP 0675283 A1 EP0675283 A1 EP 0675283A1 EP 95103810 A EP95103810 A EP 95103810A EP 95103810 A EP95103810 A EP 95103810A EP 0675283 A1 EP0675283 A1 EP 0675283A1
Authority
EP
European Patent Office
Prior art keywords
valve
injection valve
perforated
perforated disk
punching
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
EP95103810A
Other languages
German (de)
English (en)
Other versions
EP0675283B1 (fr
Inventor
Jörg Dipl.-Ing. Heyse
Norbert Dipl.-Ing. Belzner (Fh)
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 EP0675283A1 publication Critical patent/EP0675283A1/fr
Application granted granted Critical
Publication of EP0675283B1 publication Critical patent/EP0675283B1/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
    • 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
    • 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
    • F02M61/166—Selection of particular materials
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1853—Orifice plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49428—Gas and water specific plumbing component making
    • Y10T29/49432—Nozzle making

Definitions

  • the invention is based on an injection valve according to the preamble of the main claim.
  • an injection valve is already known which has a perforated disk downstream of its valve seat surface.
  • the perforated disc has several spray holes through which a medium such as fuel can escape.
  • the spray holes are made by eroding in the perforated disc.
  • perforated disks on injection valves that have injection holes made by punching.
  • the cup-shaped perforated disks represent a thin sheet and, depending on the material, have a tensile strength of 400 to 600 N / mm2.
  • the punching of the spray holes in the perforated disk has the result that a punching indentation is formed on a first surface on which the punch hits the perforated disk, while on a second surface on which the punch emerges from the perforated disk again on A raised area in the form of a ridge arises.
  • This disadvantageous ridge cannot be kept constant in many punching processes, so that it is relatively large Flow and beam angle scatter can occur. In large series production, however, these variations should be kept as low as possible. Grinding the punch burrs would represent an additional process that further increases manufacturing costs.
  • the injection valve according to the invention with the characterizing features of the main claim has the advantage that little effort and cost-effectively produced perforated disks with punched spray holes do not have any disadvantageous burr and, above all, the scattering of the jet angle or the flow rate is significantly reduced. A complex deburring is therefore inevitable. In large series production, the quality of the spray holes can be kept largely constant, so that the scattering of the medium flowing through is less.
  • FIG. 1 shows a partially illustrated injection valve
  • FIG. 2 shows a perforated disk
  • FIG. 3 shows a partially illustrated perforated disk of low hardness with a spray hole according to the prior art
  • FIG. 4 shows a perforated disk of greater hardness with a spray hole
  • FIG. 5 shows a perforated disk of greater hardness with a spray hole , which is punched in the opposite direction of flow.
  • the injection valve has a tubular valve seat support 1, in which a longitudinal opening 3 is formed concentrically with a valve longitudinal axis 2.
  • a longitudinal opening 3 is formed concentrically with a valve longitudinal axis 2.
  • the injection valve is actuated in a known manner, for example electromagnetically.
  • An indicated electromagnetic circuit with a magnet coil 10, an armature 11 and a core 12 serves for the axial movement of the valve needle 5 and thus for opening against the spring force of a return spring (not shown) or closing the injection valve.
  • the armature 11 is facing away from the valve closing body 7 End of the valve needle 5 by z.
  • a guide opening 15 of a valve seat body 16 is used to guide the valve closing body 7 during the axial movement.
  • the cylindrical valve seat body 16 is tightly mounted in the longitudinal opening 3 which is concentric to the longitudinal axis 2 of the valve by welding.
  • the valve seat body 16 On its one lower end face 17 facing away from the valve closing body 7 the valve seat body 16 with a bottom part 20 of a z.
  • B. pot-shaped perforated disc 21 concentrically and firmly connected so that the bottom part 20 abuts with its upper end face 44 on the lower end face 17 of the valve seat body 16.
  • valve seat body 16 and the perforated disk 21 are connected, for example, by a circumferential and sealed first weld seam 22 which is formed by a laser.
  • This type of assembly increases the risk of undesired deformation of the base part 20 in its central region 24, in which at least one, For example, four injection holes 25 formed by stamping are avoided.
  • a peripheral holding edge 26 adjoins the base part 20 of the pot-shaped perforated disk 21, for example.
  • the holding edge 26 exerts a radial spring action on the wall of the longitudinal opening 3. This prevents chip formation on the valve seat part and on the longitudinal opening 3 when the valve seat part consisting of valve seat body 16 and perforated disk 21 is inserted into the longitudinal opening 3 of the valve seat carrier 1.
  • the holding edge 26 of the perforated disk 21 is connected to the wall of the longitudinal opening 3, for example by a circumferential and tight second weld seam 30.
  • the insertion depth of the valve seat part consisting of valve seat body 16 and cup-shaped perforated disk 21 into the longitudinal opening 3 determines the presetting of the stroke of the valve needle 5, since the one end position of the valve needle 5 when the solenoid coil 10 is not energized due to the valve closing body 7 resting on a valve seat surface 29 of the valve seat body 16 is set.
  • the other end position the valve needle 5 is fixed when the magnet coil 10 is excited, for example by the armature 11 resting on the core 12.
  • the path between these two end positions of the valve needle 5 thus represents the stroke.
  • the spherical valve closing body 7 interacts with the valve seat surface 29 of the valve seat body 16 which tapers in the shape of a truncated cone, which is formed in the axial direction between the guide opening 15 and the lower end face 17 of the valve seat body 16.
  • a protective cap 40 is arranged on the periphery of the valve seat support 1 at its downstream end facing away from the solenoid 10 and is connected to the valve seat support 1 by means of, for example, a snap-in connection.
  • a sealing ring 41 serves to seal between the circumference of the injection valve and a valve receptacle, not shown, for example the intake line of the internal combustion engine.
  • FIG. 2 shows the perforated disk 21 with its spray holes 25 arranged in the central region 24.
  • B symmetrically around the longitudinal valve axis 2 in the form of corner points of a square and thus each have the same distance from each other and to the longitudinal valve axis 2.
  • the bottom part 20 of the perforated disc 21 has the upper end face 44, which corresponds to a second flat surface, and an opposite lower Face 19, which corresponds to a first flat surface.
  • the injection holes 25 are introduced in the opposite direction on the injection valve according to the invention.
  • the punching direction is indicated by an arrow 45.
  • the punches of the punching tool thus first meet the first surface 19 of the bottom part 20 of the perforated disk 21, which in the later installation position of the perforated disk 21 on the injection valve is downstream of the second surface 44, and penetrate the material of the perforated disk 21 to the second surface 44, where they leak out of the material.
  • the punching direction is therefore opposite to the medium flow direction ( Figure 2).
  • FIG. 3 shows a spray hole 25 in a perforated disk 21, as is the case with punching which has been customary to date.
  • the known perforated disks have a tensile strength of 400 to 600 N / mm2 depending on the material.
  • the relatively low hardness resulting from these values is the reason why a punching indentation 50, i.e. an enlargement of the cross-section of the injection hole 25, occurs on the first surface 19 due to the entry of the punch, while a ridge 51 on the second surface 44 extends over the Surface 44 protrudes, arises.
  • the consequences of these phenomena at the spray hole 25, which are not shown to scale, are comparatively large flow and jet angle scatterings.
  • FIG. 4 shows a spray hole 25 in the perforated disk 21, which is made of a material of greater hardness than the material of the perforated disk 21 according to FIG. 3.
  • the perforated disk 21 now has a tensile strength of> 800 N / mm2, which corresponds approximately to a Vickers hardness of> 300 HV1.
  • the usual perforated disks 21 can be brought to a greater material hardness, for example, by work hardening.
  • the greater material hardness means that there is little or no negligible punching or burring. Due to the greater brittleness of the material, there is no burr formation, but there is a punch breakout 52 at the injection hole 25, and the material breaks out on the exit surface of the punch, that is to say on the second surface 44.
  • This punch cutout 52 slightly enlarges the cross section of the spray hole 25 only in the vicinity of the second surface 44. The scatter of the flow rates can be reduced as a result; the beam angle scattering is retained by the punch cutout 52 on the downstream second
  • FIG. 5 shows a perforated disk 21 with a spray hole 25, which was punched in the opposite direction to the later medium flow direction, namely from the first surface 19 to the second surface 44, as indicated by the arrow 45 for the punching direction.
  • the material properties are the same as for the perforated disc 21 shown in FIG. 4, the tensile strength of the material is therefore also> 800 N / mm2.
  • the punch cutout 52 created by the punching lies on the second surface 44 of the perforated disk 21, but in the installed state in the injection valve faces the valve closing body 7.
  • the transition from the spraying hole 25 to the first surface 19 is therefore relatively sharp-edged and therefore has almost no deformations which cause negative effects when spraying.
  • the beam angle scatter advantageously remains very low due to this arrangement.
  • the variation in the flow rate can be reduced even further by varying the punch diameter of the punching tool.
  • the configuration of the perforated disk 21 according to the invention is possible with any shape of the perforated disk, that is to say also with perforated disks which do not have a holding edge 26.

Landscapes

  • 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)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Powder Metallurgy (AREA)
EP95103810A 1994-04-02 1995-03-16 Soupape d'injection Expired - Lifetime EP0675283B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4411554 1994-04-02
DE4411554A DE4411554A1 (de) 1994-04-02 1994-04-02 Einspritzventil

Publications (2)

Publication Number Publication Date
EP0675283A1 true EP0675283A1 (fr) 1995-10-04
EP0675283B1 EP0675283B1 (fr) 1998-06-03

Family

ID=6514553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95103810A Expired - Lifetime EP0675283B1 (fr) 1994-04-02 1995-03-16 Soupape d'injection

Country Status (5)

Country Link
US (1) US5626295A (fr)
EP (1) EP0675283B1 (fr)
JP (1) JPH07279798A (fr)
DE (2) DE4411554A1 (fr)
ES (1) ES2117317T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107842453A (zh) * 2016-09-20 2018-03-27 罗伯特·博世有限公司 用于进气口燃料喷射器的燃料喷射模块

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5984208A (en) * 1997-11-03 1999-11-16 Caterpillar Inc. Fuel injector having a press-in valve seat
US6247656B1 (en) 2000-04-26 2001-06-19 Resources Conservation, Inc. Shower head
JP2002054533A (ja) * 2000-08-16 2002-02-20 Unisia Jecs Corp 燃料噴射弁及び該燃料噴射弁に用いるノズルプレートの製造方法
DE10042956A1 (de) * 2000-08-31 2002-03-21 Siemens Ag Düsenkörper mit Schutzkappe
US7003880B2 (en) * 2001-10-05 2006-02-28 Denso Corporation Injector nozzle and method of manufacturing injector nozzle
US6817545B2 (en) * 2002-01-09 2004-11-16 Visteon Global Technologies, Inc. Fuel injector nozzle assembly
US6789406B2 (en) 2002-03-15 2004-09-14 Siemens Vdo Automotive Corporation Methods of forming angled orifices in an orifice plate
US6945478B2 (en) 2002-03-15 2005-09-20 Siemens Vdo Automotive Corporation Fuel injector having an orifice plate with offset coining angled orifices
US7490784B2 (en) * 2002-06-10 2009-02-17 Siemens Aktiengesellschaft Injector for injecting fuel
US20040163254A1 (en) * 2002-12-27 2004-08-26 Masanori Miyagawa Method for manufacturing injection hole member
US20060107526A1 (en) * 2004-11-22 2006-05-25 Von Bacho Paul S Iii Process for inserting flow passages in a work piece
US10370177B2 (en) 2016-11-22 2019-08-06 Summit Packaging Systems, Inc. Dual component insert with uniform discharge orifice for fine mist spray

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000686A1 (fr) * 1992-06-27 1994-01-06 Robert Bosch Gmbh Disque perfore d'injection pour soupape et son procede de fabrication

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57131567A (en) * 1981-01-16 1982-08-14 Ricoh Co Ltd Nozzle for ink jet printer
EP0219591B1 (fr) * 1985-10-22 1988-12-28 VOEST-ALPINE AUTOMOTIVE Gesellschaft m.b.H. Procédé de fabrication d'un corps d'injecteur
US4699323A (en) * 1986-04-24 1987-10-13 General Motors Corporation Dual spray cone electromagnetic fuel injector
US4923169A (en) * 1987-12-23 1990-05-08 Siemens-Bendix Automotive Electronics L.P. Multi-stream thin edge orifice disks for valves
US4934653A (en) * 1987-12-23 1990-06-19 Siemens-Bendix Automotive Electronics L.P. Multi-stream thin edge orifice disks for valves
GB8817774D0 (en) * 1988-07-26 1988-09-01 Lucas Ind Plc Fuel injectors for i c engines
US5052624A (en) * 1988-03-11 1991-10-01 Possis Corporation Ultra high pressure water cleaning tool
DE4026721A1 (de) * 1990-08-24 1992-02-27 Bosch Gmbh Robert Einspritzventil und verfahren zur herstellung eines einspritzventils
US5350119A (en) * 1993-06-01 1994-09-27 Siemens Automotive L.P. Clad metal orifice disk for fuel injectors

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000686A1 (fr) * 1992-06-27 1994-01-06 Robert Bosch Gmbh Disque perfore d'injection pour soupape et son procede de fabrication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107842453A (zh) * 2016-09-20 2018-03-27 罗伯特·博世有限公司 用于进气口燃料喷射器的燃料喷射模块
CN107842453B (zh) * 2016-09-20 2022-04-12 罗伯特·博世有限公司 用于进气口燃料喷射器的燃料喷射模块

Also Published As

Publication number Publication date
EP0675283B1 (fr) 1998-06-03
DE4411554A1 (de) 1995-10-05
US5626295A (en) 1997-05-06
ES2117317T3 (es) 1998-08-01
JPH07279798A (ja) 1995-10-27
DE59502382D1 (de) 1998-07-09

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