US3608171A - Method of making fuel injection valve - Google Patents

Method of making fuel injection valve Download PDF

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Publication number
US3608171A
US3608171A US885593A US3608171DA US3608171A US 3608171 A US3608171 A US 3608171A US 885593 A US885593 A US 885593A US 3608171D A US3608171D A US 3608171DA US 3608171 A US3608171 A US 3608171A
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US
United States
Prior art keywords
valve body
fuel injection
valve
longitudinal
injection valve
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
US885593A
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English (en)
Inventor
Gunther Stradtmann
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
Application granted granted Critical
Publication of US3608171A publication Critical patent/US3608171A/en
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
    • 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
    • Y10T29/49405—Valve or choke making
    • Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
    • Y10T29/49416—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting
    • Y10T29/49421—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting including metallurgical bonding
    • 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
    • Y10T29/49405—Valve or choke making
    • Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
    • Y10T29/49416—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting
    • Y10T29/49423—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting including metal deforming
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49879—Spaced wall tube or receptacle
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y10T29/49917—Overedge assembling of seated part by necking in cup or tube wall
    • Y10T29/49918—At cup or tube end
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube

Definitions

  • 29-156.7R 8 Claims ABSTRACT OF THE DISCLOSURE There is described a fuel injection valve which is made in the following manner: two metal strips, one of which is provided on one face with parallel extending longitudinal grooves, are superposed in registry and with the grooved face covered. Thereupon the strips are bent as a unit to form a double-jacketed tubular body which is subsequently welded and cut into required lengths. Annular inlet and outlet grooves are provided in said body to communicate with internal longitudinal fuel channels formed by said longitudinal grooves. By means of rolling operations, the ends of said fuel channels are sealed and further, circumferentially reduced areas are provided in said valve body for positioning valve components therein.
  • This invention relates to a fuel injection valve having a tubular valve body formed of two coaxially arranged tubes that enclose at least one longitudinal fuel channel which is sealed at its ends and include an inlet channel and an outlet channel.
  • the said fuel injection valve is further of the type that is terminated at one end by a nozzle body accommodating the movable valve member and containing nozzle openings for injection. From said outlet channel there extends a port disposed in the nozzle body and leading to the pressure chamber of the fuel injection valve also contained by said nozzle body.
  • the fuel injection valve further has a coupling means that is associated with said inlet channel and serves to attach to the fuel injection valve a pressure conduit extending from the fuel injection pump.
  • the fuel injection valve is prepared as follows:
  • Two steel 'strips of substantially identical width are superimposed subsequent to copper plating the contacting faces and subsequent to providing at least one longitudinal groove in one of said faces.
  • the two superimposed strips are bent as a unit into tubular form, the longitudinally adjacent free edges of which are welded together to form a seam.
  • the tubular body so prepared is cut into pieces of predetermined length; the concentric circular terminal edges at least at one end of each piece are pinched together by rolling to seal the ends of the longitudinal grooves serving as fuel channels. Finally, the valve body is brazed.
  • the longitudinal fuel channel will not be blocked by pinching even if the valve body is crimped to obtain reduced areas.
  • crimping may freely be applied to provide securing means or shoulders particularly of annular configuration for the abutment of components (such as nozzle body, spring seat disc, coupling member, etc.) disposed in or on the tubular member.
  • FIG. 1 is an axial sectional view of a first embodiment prepared according to the invention
  • FIG. 2 is a cross-sectional view of Itwo superimposed strips from which the tubular valve body is formed;
  • FIG. 3 is a cross-sectional view of a tubular valve body formed according to the invention.
  • FIG. ⁇ 4 is an axial sectional view of a second embodiment made according to the invention.
  • FIG. l there is shown a tubular valve body generally indicated at 1 and formed of an inner jacket 20 and an outer jacket 21. Between the two jackets there extend a plurality of longitudinal fuel channels 2 (two shown). One end of the valve body 1 is sealed by a nozzle body 3 threadedly engaging the inner jacket 20. Over the other end portion of the valve body 1 there is drawn an annularly-shaped coupling member 4 which is connected to a pressure conduit S leading from a fuel injection pump, not shown. The pressure conduit 5 communicates with all longitudinal channels 2 by means of an annular, circumferential groove 6 provided in the outer face of jacket 21 and covered by the coupling member 4.
  • the inner jacket 20 of the valve body 1 is provided with an annular groove 8 which registers with at least one radial port .9 of nozzle body 3 and establishes communication through said port 9 between the longitudinal channels Z on the one hand and a pressure chamber 10 of the fuel injection valve on the other hand.
  • the pressure chamber 10 is defined by the inner wall of the hollow nozzle body 3 and by a valve needle 12 disposed therein and adapted to be axially displaced against the force of a return spring 11. The latter engages with the interposition of a spring' seat disc 13, a shoulder 14 which is created by providing an annular reduced area 14 in the valve body 1.
  • annular sealing element 16 In order to prevent the fuel from flowing from the annular groove 8 into the inside of the valve body 1, between the radial terminal face of nozzle body 3 and a second shoulder 15' formed in the inner jacket 20' by reduced area 15, there is disposed an annular sealing element 16.
  • the space defined by the inner wall of jacket 20 communicates with a discharge conduit (not shown) attached to the valve body 1 at its end distal from the nozzle body 3.
  • the tubular valve body 1 is formed as hereinafter described.
  • FIG. 2 two substantially equally wide steel strips and 21, each copper-coated on one side and one provided on its coated side with parallel extending longitudinal grooves 2.2, are placed on one another in registry, with their coated sides in engagement.
  • the superimposed strips are deformed as a unit into tubular form by means of a tube drawing machine'.
  • strip 20 becomes inner jacket 20'
  • strip 21 becomes outer jacket 21'.
  • the tubular body which in this stage is of indefinite length, has a longitudinally extending gap which is generally wedge-shaped in cross section and which is sealed by a weld 23 (FIG. 3) provided by a welding step.
  • the tube is cut or sawed into required lengths each corresponding to the length dimension of a fuel injection valve body.
  • the reduced areas 14 and 15 are provided by a rolling operation and the thread for the nozzle bod'y 3 is cut.
  • the annular grooves 6 and 8 are provided, for example, by electrolytic means.
  • the coupling part 4 is drawn on the valve body 1 into a position in which it covers groove 6.
  • the contacting faces of jacket 21' and coupling part 4 have previously been copper-coated.
  • valve body 1 is brazed.
  • valve body 3 While in the embodiment shown in FIG. l, the nozzle body 3 is screwed into the valve body, according to the embodiment depicted in FIG. 4, the nozzle body 3 is axially introduced into a valve body 1' until the edge of its leading end face 2S abuts the shoulder 26' of a reduced area 26. Thereafter, the terminal portion 27 of the valve body 1 is crimped (for example, by means of a rolling step) over a shoulder of the nozzle body 3' and, as a result, the latter is locked into the valve body 1'. Or, instead, by means of a rolling operation, the terminal portion of the valve body 1' may be depressed into an annular groove (not shown) previously provided in the nozzle body 3.
  • the method of forming the valve body 1 is identical to that described in connection with valve body 1.
  • a method of making the valve body of a fuel injection valve of the type including (A) two coaxial tubes forming said valve body, (B) at least one longitudinal fuel channel disposed between said tubes and sealed at its ends, (C) an inlet channel and an outlet channel communicating with said longitudinal channel, (D) a hollow nozzle body sealingly secured to one end of said valve body and (E) coupling means associated with said inlet channel and carrying a pressure conduit leading from a fuel injection pump, comprising the following steps:
  • valve body is, by rolling, depressed into a circumferentially extending groove provided in said nozzle body positioned in said valve body.
  • valve body is provided electrolytically with axially spaced grooves constituting said inlet channel and said outlet channel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US885593A 1968-12-18 1969-12-16 Method of making fuel injection valve Expired - Lifetime US3608171A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681815260 DE1815260A1 (de) 1968-12-18 1968-12-18 Kraftstoffeinspritzventil

Publications (1)

Publication Number Publication Date
US3608171A true US3608171A (en) 1971-09-28

Family

ID=5716513

Family Applications (1)

Application Number Title Priority Date Filing Date
US885593A Expired - Lifetime US3608171A (en) 1968-12-18 1969-12-16 Method of making fuel injection valve

Country Status (6)

Country Link
US (1) US3608171A (de)
BR (1) BR6915264D0 (de)
DE (1) DE1815260A1 (de)
ES (1) ES374665A1 (de)
FR (1) FR2026490A1 (de)
GB (1) GB1239117A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502196A (en) * 1980-02-05 1985-03-05 Heinz Kupper Method for manufacturing an insulated fuel injection nozzle device
US4784311A (en) * 1985-07-25 1988-11-15 Usui Kokusai Sangyo Kabushiki Kaisha Process of producing thick-walled composite metal tubing
US4790055A (en) * 1987-06-15 1988-12-13 Stanadyne, Inc. Method of assembling a fuel nozzle assembly
US4938193A (en) * 1987-06-15 1990-07-03 Stanadyne Automotive Corp. Fuel injection nozzle
US4951372A (en) * 1987-07-17 1990-08-28 Robert Bosch Gmbh Method for adjusting injection ports in a fuel injection valve
US5081766A (en) * 1990-10-11 1992-01-21 Siemens Automotive L.P. Method of making an electrically-operated fluid valve having improved sealing of the valve needle to the valve seat when the valve is closed
WO1998014701A1 (de) * 1996-10-02 1998-04-09 Robert Bosch Gmbh Ventil und verfahren zur herstellung eines ventiles
US6061906A (en) * 1996-01-24 2000-05-16 Aoyama Seisakusho Co., Ltd. Process for manufacturing a spool valve
EP0921304A3 (de) * 1997-12-06 2000-05-24 Lucas Industries Limited Kraftstoffeinspritzdüse
US6385848B1 (en) 2000-06-29 2002-05-14 Siemens Automotive Corporation Method of setting armature/needle lift in a fuel injector
US20070283932A1 (en) * 2002-04-11 2007-12-13 Dieter Marksteiner Leakage Connection For A Fuel Injector
US20090282682A1 (en) * 2008-05-16 2009-11-19 Perry Robert B External stroke/flow setting method for fuel injectors
US10919106B2 (en) * 2017-06-09 2021-02-16 General Electric Company Ultrasonic welding of annular components

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111370A (en) * 1977-04-08 1978-09-05 Caterpillar Tractor Co. Fuel inlet fitting for a fuel injection nozzle
DE3010613A1 (de) * 1980-03-20 1981-10-01 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzanlage
DE3010612A1 (de) * 1980-03-20 1981-10-01 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil
JPS60119364A (ja) * 1983-12-02 1985-06-26 Hitachi Ltd 電磁式燃料噴射弁
GB2237325A (en) * 1989-10-28 1991-05-01 Lucas Ind Plc I.c. engine fuel injection nozzle
JP3841372B2 (ja) * 1997-02-26 2006-11-01 臼井国際産業株式会社 高圧燃料噴射管およびその製造方法
DE19712922B4 (de) * 1997-03-27 2005-08-11 Robert Bosch Gmbh Brennstoffeinspritzventil
JP4114641B2 (ja) * 2004-06-21 2008-07-09 株式会社デンソー 燃料噴射装置のインジェクタ
DE502005003327D1 (de) * 2005-06-17 2008-04-30 Siemens Ag Einspritzventil mit einem Gehäuse und Verfahren zur Herstellung eines Gehäuses

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502196A (en) * 1980-02-05 1985-03-05 Heinz Kupper Method for manufacturing an insulated fuel injection nozzle device
US4784311A (en) * 1985-07-25 1988-11-15 Usui Kokusai Sangyo Kabushiki Kaisha Process of producing thick-walled composite metal tubing
US4790055A (en) * 1987-06-15 1988-12-13 Stanadyne, Inc. Method of assembling a fuel nozzle assembly
US4938193A (en) * 1987-06-15 1990-07-03 Stanadyne Automotive Corp. Fuel injection nozzle
US4951372A (en) * 1987-07-17 1990-08-28 Robert Bosch Gmbh Method for adjusting injection ports in a fuel injection valve
US5081766A (en) * 1990-10-11 1992-01-21 Siemens Automotive L.P. Method of making an electrically-operated fluid valve having improved sealing of the valve needle to the valve seat when the valve is closed
US6061906A (en) * 1996-01-24 2000-05-16 Aoyama Seisakusho Co., Ltd. Process for manufacturing a spool valve
US6056263A (en) * 1996-10-02 2000-05-02 Robert Bosch Gmbh Valve with constrictions to adjust stroke length
WO1998014701A1 (de) * 1996-10-02 1998-04-09 Robert Bosch Gmbh Ventil und verfahren zur herstellung eines ventiles
CN1084843C (zh) * 1996-10-02 2002-05-15 罗伯特·博施有限公司 内燃机的燃料喷射阀及其制造方法
US6318643B1 (en) 1997-06-12 2001-11-20 Lucas Industries, Plc Fuel injector nozzle
EP0921304A3 (de) * 1997-12-06 2000-05-24 Lucas Industries Limited Kraftstoffeinspritzdüse
US6385848B1 (en) 2000-06-29 2002-05-14 Siemens Automotive Corporation Method of setting armature/needle lift in a fuel injector
US6687965B2 (en) 2000-06-29 2004-02-10 Siemens Automotive Corporation Apparatus for setting armature/needle lift in a fuel injector
US20070283932A1 (en) * 2002-04-11 2007-12-13 Dieter Marksteiner Leakage Connection For A Fuel Injector
US7475674B2 (en) * 2002-04-11 2009-01-13 Siemens Aktiengesellschaft Leakage connection for a fuel injector
US20090282682A1 (en) * 2008-05-16 2009-11-19 Perry Robert B External stroke/flow setting method for fuel injectors
US8024861B2 (en) 2008-05-16 2011-09-27 Delphi Technologies, Inc. External stroke/flow setting method for fuel injectors
US10919106B2 (en) * 2017-06-09 2021-02-16 General Electric Company Ultrasonic welding of annular components

Also Published As

Publication number Publication date
DE1815260A1 (de) 1970-07-09
FR2026490A1 (de) 1970-09-18
GB1239117A (de) 1971-07-14
BR6915264D0 (pt) 1973-06-12
ES374665A1 (es) 1972-01-01

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