EP0675283B1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

Info

Publication number
EP0675283B1
EP0675283B1 EP95103810A EP95103810A EP0675283B1 EP 0675283 B1 EP0675283 B1 EP 0675283B1 EP 95103810 A EP95103810 A EP 95103810A EP 95103810 A EP95103810 A EP 95103810A EP 0675283 B1 EP0675283 B1 EP 0675283B1
Authority
EP
European Patent Office
Prior art keywords
valve
perforated
punching
injection valve
valve seat
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
EP95103810A
Other languages
German (de)
English (en)
Other versions
EP0675283A1 (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 Genus of the main claim. From DE-OS 40 26 721 already known an injection valve that is downstream of it Valve seat surface has a perforated disc.
  • the perforated disc has several spray holes through which a medium such as Can leak fuel.
  • the spray holes are through Eroding introduced in the perforated disc.
  • perforated disks on injection valves that have injection holes made by punching.
  • Such an injection valve according to WO-A-9400686 forms the preamble of claim 1.
  • The, for example, cup-shaped perforated disks represent a thin sheet and, depending on the material, have a tensile strength of 400 to 600 N / mm 2 .
  • the punching of the spray holes in the perforated disk has the result that a punching indentation forms 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 relatively large flow and jet angle scattering 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.
  • Embodiments of the invention are in the drawing shown in simplified form and in the following Description explained in more detail.
  • 1 shows it partially illustrated injection valve
  • Figure 2 a Perforated disk
  • Figure 3 is a partially shown perforated disk low hardness with a spray hole according to the state of the Technique
  • Figure 4 is a perforated disc of greater hardness with a Spray hole
  • Figure 5 with a perforated disk of greater hardness a spray hole that is opposite to the later one Flow direction is punched.
  • a valve is shown in FIG. 1 as an exemplary embodiment the shape of an injector for Fuel injection systems from mixture compressors spark-ignited internal combustion engines partially shown.
  • the injector has a tubular valve seat support 1, in which a valve axis 2 concentric Longitudinal opening 3 is formed.
  • a valve axis 2 concentric Longitudinal opening 3 is formed in the longitudinal opening 3 .
  • tubular valve needle 5 arranged on the its downstream end 6 with a z.
  • the injection valve is actuated in a known manner Way, for example electromagnetic.
  • a return spring (not shown) or An indicated closing serves to close the injection valve electromagnetic circuit with a magnetic coil 10, one Anchor 11 and a core 12.
  • the anchor 11 is with the End of valve needle 5 facing away from valve closing body 7 through z. B. connected a weld using a laser and aligned with the core 12.
  • Valve seat body 16 To guide the valve closing body 7 during the A guide opening 15 serves for axial movement Valve seat body 16.
  • the core 11 opposite end of the valve seat support 1 is in the concentric to the longitudinal axis 2 of the valve Longitudinal opening 3 of the cylindrical valve seat body 16 through Welding tightly assembled.
  • Valve closing body 7 facing away from the lower end face 17 the valve seat body 16 with a bottom part 20 of a z.
  • valve seat body 16 and perforated disk 21 takes place, for example, by a circumferential and dense, first weld seam 22 formed by a laser.
  • first weld seam 22 formed by a laser.
  • Perforated disk 21 On the bottom part 20 of the pot-shaped, for example Perforated disk 21 closes a circumferential holding edge 26 on.
  • the holding edge 26 exerts a radial spring action on the Wall of the longitudinal opening 3.
  • the holding edge 26 of the Perforated disk 21 is with the wall of the longitudinal opening 3rd for example by a circumferential and dense second Weld 30 connected.
  • the insertion depth of the valve seat body 16 and pot-shaped perforated disk 21 existing valve seat part in the longitudinal opening 3 determines the default stroke Valve needle 5, since the one end position of the valve needle 5 at non-excited solenoid 10 by the system of Valve closing body 7 on a valve seat surface 29 of the Valve seat body 16 is fixed.
  • the other end position the valve needle 5 is when the solenoid 10 is excited for example by the anchor 11 resting against the core 12 fixed.
  • the path between these two end positions Valve needle 5 thus represents the stroke.
  • the spherical valve closing body 7 acts with the in Direction of flow tapering in the shape of a truncated cone Valve seat surface 29 of the valve seat body 16 together, the in the axial direction between the guide opening 15 and the lower end face 17 of the valve seat body 16 is formed is.
  • valve seat support 1 On the circumference of the valve seat support 1 is on his downstream, the solenoid 10 facing end one Protective cap 40 arranged and by means of, for example Snap connection connected to the valve seat support 1.
  • a Sealing ring 41 serves to seal between the circumference of the Injector and one, not shown Valve holder, for example the intake line of the Internal combustion engine.
  • FIG. 2 shows the perforated disk 21 with its central one Area 24 arranged spray holes 25.
  • Die for example, four spray holes 25 are located e.g. B. symmetrical about the valve longitudinal axis 2 in the form of corner points of a square and thus each have the equal distance from each other and to the valve longitudinal axis 2.
  • Das Bottom part 20 of the perforated disc 21 has the upper end face 44, which corresponds to a second flat surface, and one opposite lower end face 19, that of a first corresponds to a flat surface.
  • the spray holes 25 are Injector according to the invention in the opposite Direction introduced.
  • the punching direction is indicated by a Arrow 45 is displayed.
  • the stamps of the punching tool So first hit the first surface 19 of the bottom part 20 of the perforated disc 21, which in the later installation position Perforated disk 21 on the injection valve downstream of the second Surface 44 lies, and penetrate the material of the Perforated disc 21 to the second surface 44, where it from the Leak material.
  • the punching direction thus runs 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 / mm 2 .
  • the relatively low hardness resulting from these values is the reason why a punch feed 50, that is to say a cross-sectional enlargement of the injection hole 25, occurs on the first surface 19 due to the entry of the punch, while a burr 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 / mm 2 , 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
  • 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 disk 21 shown in FIG. 4, the tensile strength of the material is therefore also> 800 N / mm 2 .
  • 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 every shape of the perforated disc, also with Perforated disks that 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)

Claims (2)

  1. Injecteur, notamment injecteur de carburant pour des installations d'injection de carburant de moteurs à combustion interne comprenant un disque à orifices (21) ayant une première face (19) et une seconde face (44) et au moins un orifice d'éjection (25) fabriqué par poinçonnage, la direction du poinçonnage étant celle partant de la première face vers la seconde face,
    caractérisé en ce que
    le disque à orifices (21) a une résistance à la traction supérieure à 800 N/mm2 et,
    le disque à orifice (21) est monté dans l'injecteur pour que la première surface (19) soit située en aval de la seconde surface (44).
  2. Injecteur selon la revendication 1,
    caractérisé en ce que
    la résistance à la traction du disque à orifices (21) est supérieure à 800 N/mm2 et présente une dureté Vickers supérieure à 300 HV1.
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 EP0675283A1 (fr) 1995-10-04
EP0675283B1 true 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)

Families Citing this family (13)

* 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
US6945478B2 (en) 2002-03-15 2005-09-20 Siemens Vdo Automotive Corporation Fuel injector having an orifice plate with offset coining angled orifices
US6789406B2 (en) 2002-03-15 2004-09-14 Siemens Vdo Automotive Corporation Methods of forming angled orifices in an orifice plate
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
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
US10370177B2 (en) 2016-11-22 2019-08-06 Summit Packaging Systems, Inc. Dual component insert with uniform discharge orifice for fine mist spray

Family Cites Families (10)

* 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
DE3567062D1 (en) * 1985-10-22 1989-02-02 Voest Alpine Automotive Method of manufacturing an injection nozzle housing
US4699323A (en) * 1986-04-24 1987-10-13 General Motors Corporation Dual spray cone electromagnetic fuel injector
US4934653A (en) * 1987-12-23 1990-06-19 Siemens-Bendix Automotive Electronics L.P. Multi-stream thin edge orifice disks for valves
US4923169A (en) * 1987-12-23 1990-05-08 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
DE4221185A1 (de) * 1992-06-27 1994-01-05 Bosch Gmbh Robert Spritzlochscheibe für ein Ventil und Verfahren zur Herstellung
US5350119A (en) * 1993-06-01 1994-09-27 Siemens Automotive L.P. Clad metal orifice disk for fuel injectors

Also Published As

Publication number Publication date
DE59502382D1 (de) 1998-07-09
US5626295A (en) 1997-05-06
DE4411554A1 (de) 1995-10-05
JPH07279798A (ja) 1995-10-27
EP0675283A1 (fr) 1995-10-04
ES2117317T3 (es) 1998-08-01

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