US3876153A - Fuel injector and method for making same - Google Patents

Fuel injector and method for making same Download PDF

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Publication number
US3876153A
US3876153A US31057072A US3876153A US 3876153 A US3876153 A US 3876153A US 31057072 A US31057072 A US 31057072A US 3876153 A US3876153 A US 3876153A
Authority
US
United States
Prior art keywords
valve
sealant
bore
guide sleeve
annulus
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
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English (en)
Inventor
Vernon D Roosa
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.)
Stanadyne Automotive Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US31057072 priority Critical patent/US3876153A/en
Priority to CA185,545A priority patent/CA980643A/en
Priority to GB5237073A priority patent/GB1403339A/en
Priority to AU62620/73A priority patent/AU474989B2/en
Priority to JP13063673A priority patent/JPS577299B2/ja
Priority to IN2585/CAL/73A priority patent/IN139183B/en
Priority to ES420804A priority patent/ES420804A1/es
Priority to FR7342651A priority patent/FR2208057B1/fr
Priority to SE7315950A priority patent/SE388912B/xx
Priority to AR25115373A priority patent/AR200291A1/es
Priority to DE2358922A priority patent/DE2358922A1/de
Priority to BR934973A priority patent/BR7309349D0/pt
Priority to IT3175873A priority patent/IT1003245B/it
Application granted granted Critical
Publication of US3876153A publication Critical patent/US3876153A/en
Assigned to MANUFACTURERS HANOVER TRUST COMPANY, AS AGENT reassignment MANUFACTURERS HANOVER TRUST COMPANY, AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STANADYNE AUTOMOTIVE CORP.
Assigned to STANADYNE AUTOMOTIVE CORP., A CORP. OF DE reassignment STANADYNE AUTOMOTIVE CORP., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: STANADYNE, INC.
Anticipated expiration legal-status Critical
Assigned to STANADYNE INC. reassignment STANADYNE INC. RELEASE OF SECURITY INTEREST Assignors: CHEMICAL BANK, AS SUCCESSOR IN INTEREST TO MANUFACTURERS HANOVER TRUST COMPANY
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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7835—Valve seating in direction of flow

Definitions

  • ABSTRACT A precision fuel injector having an inwardly opening pressure operated valve positioned in a bore forming a valve chamber and guided for reciprocal movement to open and close the valve wherein a threaded stepped cylindrical valve guide sleeve at the end of the valve chamber opposite the valve tip mounts the valve and cooperates with a mating portion of the bore to form an annulus filled with an initially flowable settable sealant.
  • the sealant is pressurized during assembly of the guide sleeve and is forced into the clearance between the threads of the guide and the threads of the bore on both sides of the annulus to increase the length of the seal and to lock the guide sleeve in place.
  • the blind end of the guide sleeve bottoms against a shoulder in the bore to establish a predetermined minimum cross-section of the annulus to minimize the possibility of fracture of the sealant ring therein due to differential expansion, and a pilot extending from the end of the guide sleeve and closely fitted within the surrounding bore protects the sealant against corrosion by the repetitive high impact hydraulic forces within the valve chamber.
  • Fuel injectors of the type contemplated by this invention have a plunger or valve which is lifted from its seat by the pressure of fuel delivered to the injector by an associated high pressure pump in measured charges in timed relation with the associated engine.
  • Another object of this invention is to provide a novel method for using a sealant for securing a guide sleeve in the bore of a fuel injector and sealing and locking the same in position without escape of the sealant past the blind end of the insert.
  • FIG. 1 is a fragmentary cross-sectional view of a fuel injector embodying the present invention.
  • FIG. 2 is an enlarged fragmentary cross-sectional view showing the valve guide of FIG. 1.
  • the exemplary injector shown in the drawing and embodying the present invention is of the pressure-operable type and includes an elongated tubular body having a discharge tip 12 rigidly positioned at one end thereof.
  • the tubular body 10 further provides a central longitudinal bore extending throughout its length to form a valve chamber 14.
  • Located within the valve chamber 14 is a rod-like plunger or valve 16 having a conical tip 18 which cooperatively engages a valve seat 20 to control the discharge of fuel from the valve chamber 14 through discharge orifices 22.
  • a valve guide sleeve generally indicated at 24 is positioned within the bore of the tubular body 10 at one end of the valve chamber 14 to slidably mount and align the valve 16 with the valve seat 20 for rapid reciprocal movement under the influence of fuel pressure within the bore 14 acting against the bias of spring 26.
  • the injector is provided with a fuel inlet 28 communicating with the valve chamber 14 for the delivery of discrete charges of high pressure fuel to the bore 14 from an associated high pressure charge pump, not shown.
  • the upper end of the valve 16 engages a spring seat 30 which is in turn engaged by biasing spring 26.
  • the other end of biasing spring 26 is similarly provided with a spring seat 32 to cause the spring to exert an axial force on the valve 16.
  • An extension 42 of the spring seat 32 limits the lift of the valve 16 away from the valve seat 20.
  • novel means are provided for locating and sealing the valve guide sleeve 24 in assembled position in the injector body.
  • the guide sleeve 24 is provided with a pair of axially spaced stepped cylindrical threaded portions 44, 46 with an intermediate annular recess 48 therebetween with the threads on portions 44, 46 being formed on the same helix but having different pitch diameters.
  • Mating threaded cylindrical wal portions 50, 52 are provided within the bore of the injector.
  • the shoulder 54 at the end of guide sleeve 24 bottoms on a mating shoulder 56 provided in the bore.
  • an initially flowable settable sealant for example, an epoxy resin
  • an initially flowable settable sealant for example, an epoxy resin
  • the shoulder 54 is bottomed on the shoulder 56 and the sealant within the annulus 48 is pressurized to impart a hydraulic pressure on the sealant and force it into the clearances between the threads on both sides of the annulus.
  • the amount of sealant utilized is sufficient to cause the sealant to be squeezed in between the mating threads 44, 50 and 46, 52, respectively, to lengthen the seal and lock the guide sleeve 24 in the injector body.
  • the bottomed shoulders 54, 56 guard against the entry of sealant into the valve chamber 14. In this regard any excess sealant will be collected in the annulus 60 at the end of the threads.
  • the sealant thus positioned between the guide sleeve 24 and the injector body sets, or is treated so as to cause it to set, to provide a void free annular ring of sealant to permanently seal and lock the guide sleeve 24 in position.
  • the bottoming of the shoulders 54, 56 establishes the cross-section of the sealant ring in annulus 48 at a predetermined minimum to minimize the tensile stress thereon, and the possibility of fracture. due to differential expansion.
  • bottomed shoulders 54, 56, as well as pilot 62 which engages the surrounding annular surface 64 of the bore with a close fit, serve to isolate the sealant from the valve chamber 14.
  • This construction which impedes or throttles the flow of fuel from valve chamber 14 to annulus 60, protects the sealant from corrosion by the repetitive high impact hydraulic forces occasioned by the delivery of the sequential measure of high pressure fuel delivered by the charge pump for injection to the engine.
  • this invention provides a novel arrangement and method for sealing and locking a guide sleeve within a bore or aperture of an injector body in a manner which assures a leak-proof seal therebetween while guarding against the escape of the sealant beyond the blind end of the guide sleeve and into the valve chamber.
  • valve guide is a generally cylindrical sleeve having an end portion and a pair of axially displaced cylindrically shaped threaded outer surface portions separated by a step
  • the portion of the valve chamber remote from the valve seat is provided with a bore having a pair of stepped surface portions which cooperate with the stepped surface portions of said sleeve to form an annular therebetween when the end portion of the guide sleeve bottoms on a mating shoulder provided by the bore to guard against the entry of sealant into the valve chamber
  • each of said stepped surface portions of said tubular body being threaded and respectively engaging one of the stepped threaded portions of said sleeve, and an initially flowable settable sealant disposed in said annulus to be entrapped and compressed therein during assembly as the
  • An injector as recited in claim 1 including throttling means for throttling the flow of fuel from said valve chamber toward said sealant to protect the sealant against corrosion.
  • the injector of claim 4 including an annulus between said pilot and the mating threads of said stepped surfaces.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US31057072 1972-11-29 1972-11-29 Fuel injector and method for making same Expired - Lifetime US3876153A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US31057072 US3876153A (en) 1972-11-29 1972-11-29 Fuel injector and method for making same
CA185,545A CA980643A (en) 1972-11-29 1973-11-09 Fuel injector and method for making same
GB5237073A GB1403339A (en) 1972-11-29 1973-11-12 Fuel injector and method for making same
AU62620/73A AU474989B2 (en) 1972-11-29 1973-11-16 Fuel injector for making same
JP13063673A JPS577299B2 (OSRAM) 1972-11-29 1973-11-20
ES420804A ES420804A1 (es) 1972-11-29 1973-11-23 Mejoras en la construccion de inyectores de combustible paramotores de combustion interna.
IN2585/CAL/73A IN139183B (OSRAM) 1972-11-29 1973-11-23
SE7315950A SE388912B (sv) 1972-11-29 1973-11-26 Brensleinsprutningsmunstycke
FR7342651A FR2208057B1 (OSRAM) 1972-11-29 1973-11-26
AR25115373A AR200291A1 (es) 1972-11-29 1973-11-26 Un inyector de combustible
DE2358922A DE2358922A1 (de) 1972-11-29 1973-11-27 Kraftstoffeinspritzduese und verfahren zur herstellung derselben
BR934973A BR7309349D0 (pt) 1972-11-29 1973-11-28 Um injetor de combustivel aperfeicoado e processo aperfeicoado de vedar e travar positivamente uma manga guia de valvula
IT3175873A IT1003245B (it) 1972-11-29 1973-11-28 Iniettore di carburante per motori a combustione interna e procedimen to per la sua costruzione

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US31057072 US3876153A (en) 1972-11-29 1972-11-29 Fuel injector and method for making same

Publications (1)

Publication Number Publication Date
US3876153A true US3876153A (en) 1975-04-08

Family

ID=23203128

Family Applications (1)

Application Number Title Priority Date Filing Date
US31057072 Expired - Lifetime US3876153A (en) 1972-11-29 1972-11-29 Fuel injector and method for making same

Country Status (13)

Country Link
US (1) US3876153A (OSRAM)
JP (1) JPS577299B2 (OSRAM)
AR (1) AR200291A1 (OSRAM)
AU (1) AU474989B2 (OSRAM)
BR (1) BR7309349D0 (OSRAM)
CA (1) CA980643A (OSRAM)
DE (1) DE2358922A1 (OSRAM)
ES (1) ES420804A1 (OSRAM)
FR (1) FR2208057B1 (OSRAM)
GB (1) GB1403339A (OSRAM)
IN (1) IN139183B (OSRAM)
IT (1) IT1003245B (OSRAM)
SE (1) SE388912B (OSRAM)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030668A (en) * 1976-06-17 1977-06-21 The Bendix Corporation Electromagnetically operated fuel injection valve
US4057190A (en) * 1976-06-17 1977-11-08 Bendix Corporation Fuel break-up disc for injection valve
US5620023A (en) * 1994-07-23 1997-04-15 Daewoo Electronics Co., Ltd. Exhaust-control valve for an electromagnetic pump
WO2008009326A1 (de) * 2006-07-20 2008-01-24 Kathrein-Werke Kg Hochfrequenzfilter in koaxialer bauweise
US9523335B2 (en) 2012-05-30 2016-12-20 Caterpillar Motoren Gmbh & Co. Kg Plunger for an internal combustion engine fuel pump

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1551247A (en) * 1975-05-30 1979-08-30 Taymar Ltd Burner units for portable gas stoves
DE2920669A1 (de) * 1979-05-22 1980-12-04 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer brennkraftmaschinen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224684A (en) * 1963-04-16 1965-12-21 Hartford Machine Screw Co Fuel injection nozzle
US3295169A (en) * 1963-12-23 1967-01-03 Ernest P Moslo Spring-pressed shutoff for injection nozzle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224684A (en) * 1963-04-16 1965-12-21 Hartford Machine Screw Co Fuel injection nozzle
US3295169A (en) * 1963-12-23 1967-01-03 Ernest P Moslo Spring-pressed shutoff for injection nozzle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030668A (en) * 1976-06-17 1977-06-21 The Bendix Corporation Electromagnetically operated fuel injection valve
US4057190A (en) * 1976-06-17 1977-11-08 Bendix Corporation Fuel break-up disc for injection valve
US5620023A (en) * 1994-07-23 1997-04-15 Daewoo Electronics Co., Ltd. Exhaust-control valve for an electromagnetic pump
WO2008009326A1 (de) * 2006-07-20 2008-01-24 Kathrein-Werke Kg Hochfrequenzfilter in koaxialer bauweise
US20080024248A1 (en) * 2006-07-20 2008-01-31 Kathrein-Werke Kg High frequency filter in a coaxial construction, in particular in the manner of a high frequency separating filter (for example a duplex separating filter) or a bandpass filter or or band-stop filter
US7728700B2 (en) 2006-07-20 2010-06-01 Kathrein-Werke Kg High frequency filter in a coaxial construction, in particular in the manner of a high frequency separating filter (for example a duplex separating filter) or a bandpass filter or band-stop filter
US9523335B2 (en) 2012-05-30 2016-12-20 Caterpillar Motoren Gmbh & Co. Kg Plunger for an internal combustion engine fuel pump

Also Published As

Publication number Publication date
IT1003245B (it) 1976-06-10
JPS4982817A (OSRAM) 1974-08-09
AR200291A1 (es) 1974-10-31
IN139183B (OSRAM) 1976-05-15
JPS577299B2 (OSRAM) 1982-02-09
BR7309349D0 (pt) 1974-08-29
DE2358922A1 (de) 1974-06-06
AU6262073A (en) 1975-05-22
SE388912B (sv) 1976-10-18
CA980643A (en) 1975-12-30
GB1403339A (en) 1975-08-28
ES420804A1 (es) 1977-01-01
AU474989B2 (en) 1976-08-05
FR2208057A1 (OSRAM) 1974-06-21
FR2208057B1 (OSRAM) 1980-10-03

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Legal Events

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AS Assignment

Owner name: MANUFACTURERS HANOVER TRUST COMPANY, AS AGENT

Free format text: SECURITY INTEREST;ASSIGNOR:STANADYNE AUTOMOTIVE CORP.;REEL/FRAME:005046/0096

Effective date: 19890210

AS Assignment

Owner name: STANADYNE AUTOMOTIVE CORP., A CORP. OF DE, CONNECT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:STANADYNE, INC.;REEL/FRAME:005130/0582

Effective date: 19890210

AS Assignment

Owner name: STANADYNE INC., CONNECTICUT

Free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:CHEMICAL BANK, AS SUCCESSOR IN INTEREST TO MANUFACTURERS HANOVER TRUST COMPANY;REEL/FRAME:007308/0169

Effective date: 19950201