EP0503757B1 - Injecteur de carburant avec ajustage en silicone - Google Patents

Injecteur de carburant avec ajustage en silicone Download PDF

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Publication number
EP0503757B1
EP0503757B1 EP19920300881 EP92300881A EP0503757B1 EP 0503757 B1 EP0503757 B1 EP 0503757B1 EP 19920300881 EP19920300881 EP 19920300881 EP 92300881 A EP92300881 A EP 92300881A EP 0503757 B1 EP0503757 B1 EP 0503757B1
Authority
EP
European Patent Office
Prior art keywords
fuel
nozzle
retainer
injector
injector body
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
EP19920300881
Other languages
German (de)
English (en)
Other versions
EP0503757A3 (en
EP0503757A2 (fr
Inventor
Robert C. Gardner
Marvin D. Wells
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.)
Ford Werke GmbH
Ford France SA
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Werke GmbH
Ford France SA
Ford Motor Co Ltd
Ford Motor Co
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 Ford Werke GmbH, Ford France SA, Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Werke GmbH
Publication of EP0503757A2 publication Critical patent/EP0503757A2/fr
Publication of EP0503757A3 publication Critical patent/EP0503757A3/en
Application granted granted Critical
Publication of EP0503757B1 publication Critical patent/EP0503757B1/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
    • F02M61/166—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
    • 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

Definitions

  • the present invention relates generally to a fuel injector having a nozzle, preferably a silicon nozzle, and more particularly, to such a fuel injector which includes a retainer for applying a spring- biased force against the silicon nozzle to retain the same against the body of the fuel injector.
  • Fuel injectors employing silicon nozzles for metering and dispersing fuel as it is ejected are known in the prior art.
  • Retainers for securing silicon nozzles onto fuel injector bodies are also known in the art.
  • US-A-4,768,751 discloses a retainer which threadedly engages with a fuel injector body for retaining a valve plate and a nozzle plate against a bottom portion of the injector body.
  • a Belleville washer is provided within the retainer for applying an upwardly directed force upon the valve plate and the nozzle plate.
  • a nozzle retainer in accordance with the present invention which includes a side wall and a bottom wall extending at an acute angle relative to the side wall.
  • the bottom wall is deformed against the silicon nozzle when initially fitted onto the fuel injector's body. This enables the bottom wall to apply a spring-biased force against the silicon nozzle to retain the same against the injector body, thereby substantially sealing the interface between the silicon nozzle and the injector body from fuel leakage.
  • a fuel injector for use in an internal combustion engine comprising: an injector body including a first portion having an inlet for communicating with a fuel source, a second portion having an outlet for ejecting fuel from said body, and an inner passageway which communicates with said inlet and said outlet; fuel valve means located within said inner passageway for controlling fuel ejection from said outlet; nozzle means positioned adjacent to said second portion for dispersing fuel as it is ejected from said outlet; and retainer means connected to said injector body for retaining said nozzle means against said second portion, said retainer means having a side portion and a base portion extending at an angle relative to said side portion to retain said nozzle means against said second portion, thereby substantially sealing the interface between said nozzle means and said second portion from fuel leakage, characterised in that said base portion of said retainer means extends at an acute angle relative to said side portion, said retainer being mounted and connected to said injector body under load so that a spring-biased force is maintained upon said nozzle means at substantially all
  • the nozzle means comprises at least one silicon nozzle plate having a substantially square shape and one or more openings therein.
  • the base portion of the retainer means is deformed against the nozzle means before the retainer means is connected to the injector body to generate the spring-biased force.
  • the retainer means may be weldably connected to the injector body, crimped or snap-fitted onto the injector body.
  • the side portion of the retainer means comprises a substantially cylindrical upper section having a first inner diameter, a substantially cylindrical lower section having a second inner diameter, and an intermediate interconnecting section interposed therebetween.
  • the silicon nozzle plate is located within the cylindrical lower section and the second inner diameter of the lower section is substantially equal to each diagonal of the silicon nozzle plate. As a result, the silicon nozzle plate is maintained in proper position below the second portion of the injector body and is substantially prevented from moving laterally within the retainer means.
  • the second portion of the injector body includes a recess formed therein for receiving the silicon nozzle plate.
  • the base portion of the injector body serves to retain the nozzle plate in the recess by applying the spring-biased force against the nozzle plate.
  • the side portion of the retainer means may comprise an upper section, a lower section, and an intermediate interconnecting section interposed therebetween as discussed above with respect to the first embodiment of the first aspect of the present invention.
  • the second portion of the injector body may include a recess formed therein for receiving the silicon nozzle plate as discussed above with respect to the second embodiment of the first aspect of the present invention.
  • a retainer which can be easily and precisely connected to an injector body during manufacturing. It is a further object of the present invention to provide a retainer for applying a spring-biased force against a silicon nozzle to retain the silicon nozzle against a fuel injector body, thereby substantially sealing the interface between the silicon nozzle and the injector body from fuel leakage.
  • a preferred embodiment of the present invention provides a fuel injector including retainer means having a side wall which has a lower section with an inner diameter which is substantially equal to the diagonals of the silicon nozzle to maintain the silicon nozzle in proper position below the injector body and substantially prevent lateral movement of the silicon nozzle within the retainer.
  • a first embodiment of a fuel injector of the present invention is shown in Fig. 1.
  • the fuel injector 10 comprises an injector body 12 having a first, upper portion 14 and a second, lower portion 16.
  • the first portion 14 includes an inlet 18 for communicating with a fuel source (not shown).
  • the second portion 16 includes a substantially planar bottom wall 17, and an outlet 20 for ejecting fuel from the body 12.
  • the injector body 12 further includes an inner passageway 22 which communicates with the inlet 18 and the outlet 20.
  • a needle valve 30 Positioned within the inner passageway 22 of the injector body 12 is a needle valve 30, which serves to control the amount of fuel ejected from the outlet 20.
  • the needle valve 30 comprises a needle 32 and a seat 34, upon which the needle 32 sits while located at its closed position.
  • a well-known solenoid-type actuator and spring return means (not shown) is included within the injector body 12 to move the needle 32 upwardly and downwardly within the inner passageway 22 to allow fuel to be ejected from the outlet 20.
  • piezoelectric drive means such as disclosed in US-A-4,907,748, may be employed in place of the solenoid drive means for displacing the needle 32 within the passageway 22.
  • a silicon nozzle means 40 comprising two silicon nozzle plates 42 and 44 which are bonded together, is retained against the bottom wall 17 of the injector body 12 for metering and dispersing fuel into a spray as it is ejected from the outlet 20.
  • the top plate 42 includes four orifices 42a therein, while the bottom plate 44 includes a single orifice 44a.
  • the orifices 42a and 44a serve to guide the fuel as it flows through the nozzle plates 42 and 44.
  • the silicon nozzle plates 42 and 44 are substantially similar to those disclosed in US-A-4,828,184. It is further contemplated by the present invention, that a single nozzle plate may be employed in place of the two nozzle plates 42 and 44.
  • a retainer 50 is provided for retaining the silicon nozzle plates 42 and 44 against the lower wall 17 of the injector body 12.
  • the retainer 50 comprises a side portion 52 and a base portion 54 extending at an acute angle X relative to the side portion 52 (see Fig. 4).
  • the retainer 50 is die punched from stainless steel.
  • the retainer 50 may also be made from beryllium-copper or formed from a polymeric material.
  • the retainer 50 is mounted and connected to the injector body 12 under an applied load.
  • the retainer 50 may be weldably connected to the injector body 12, as shown in Fig. 2, or may be crimped or snap-fitted thereon.
  • the base portion 54 deforms against the bottom silicon plate 44, resulting in a spring-biased force being applied against the silicon plates 42 and 44 by the base portion 54. Deformation of the base portion 54 also results in the angle X increasing slightly. Since the base portion 54 extends at an acute angle X relative to the side portion 52 and the retainer 50 is mounted to the injector body 12 under a load, the spring-biased force is maintained upon the plates 42 and 44 at substantially all times, thereby ensuring that the interface 56 between top plate 42 and the lower wall 17 is substantially sealed from fuel leakage.
  • the side portion 52 of the retainer includes a substantially cylindrical upper section 52a having a first inner diameter D1, a substantially cylindrical lower section 52b having a second inner diameter D2, and an intermediate interconnecting section 52c interposed therebetween.
  • the silicon nozzle plates 42 and 44 are located within the cylindrical lower section 52b, as shown in Figs. 1-3.
  • the second inner diameter D2 of the lower section 52b is substantially equal to the diagonals L of the silicon nozzle plates 42 and 44. Consequently, the lower section 52b of the retainer 50 acts to maintain the silicon nozzle plates 42 and 44 in proper position below the second portion 16 of the injector body 12 and prevents the nozzle plates 42 and 44 from moving laterally within the retainer 50.
  • a second embodiment of a fuel injector of the present invention generally designated by the reference numeral 10', is shown.
  • the fuel injector 10' comprises an injector body 12' which is substantially similar to the injector body 12 shown in Figs. 1 and 2.
  • the second portion 16' of the injector body 12' includes a recess 19 for receiving nozzle means 40' therein.
  • the nozzle means 40' serves to meter and disperse the fuel into a spray as it is ejected from the outlet 20'.
  • the nozzle means 40' as best shown in Fig. 8, comprises a single nozzle plate 42' having at least one orifice 42a' therein.
  • the nozzle means 40' may alternatively comprise two nozzle plates as described above with respect to the first embodiment of the present invention.
  • a retainer 50' is provided for retaining the silicon nozzle plate 42' in the recess 19.
  • the retainer 50' comprises a substantially cylindrical side portion 52' and a base portion 54' extending at an acute angle x relative to the side portion 52' (see Fig. 7).
  • the retainer 50' is mounted and connected to the injector body 12' under an applied load.
  • the retainer 50' may be weldably connected to the injector body 12', as shown in Fig. 5, or crimped or snap-fitted thereon.
  • the base portion 54' extends at an acute angle x relative to the side portion 52' and the retainer 50' is mounted to the injector body 12' under a load, an applied force is maintained against the plate 42' at substantially all times, thereby ensuring that the interface 56' between the plate 42' and the lower wall 17' of the injector body 12' is substantially sealed from fuel leakage.
  • a fuel injector which includes a silicon nozzle retainer for applying a spring- biased force against a silicon nozzle to retain the same against the injector's body.
  • the retainer can be easily formed at a low cost and can be easily and precisely connected to the injector's body during manufacturing. Because the retainer applies a spring-biased force against the silicon nozzle to retain the same against the injector's body, the interface between the silicon nozzle and the injector body is substantially sealed from fuel leakage.

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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)

Claims (9)

  1. Injecteur de carburant destiné à être utilisé dans un moteur à combustion interne comprenant :
       un corps d'injecteur (12, 12') comprenant une première partie (14) comportant un orifice d'admission (18) destiné à communiquer avec une source de carburant, une seconde partie (16, 16') comportant un orifice de sortie (20, 20') destiné à éjecter du carburant à partir dudit corps, et un passage interne (22) qui communique avec ledit orifice d'admission et ledit orifice de sortie,
       un moyen de soupape de carburant (30) situé à l'intérieur dudit passage interne afin de commander l'éjection de carburant à partir dudit orifice de sortie,
       un moyen de diffuseur (40, 40') positionné à proximité immédiate de ladite seconde partie afin de disperser le carburant lorsqu'il est éjecté à partir dudit orifice de sortie, et
       un moyen d'élément de retenue (50, 50') relié audit corps d'injecteur (12, 12') afin de retenir ledit moyen de diffuseur (40, 40') contre ladite seconde partie (16, 16'), ledit moyen de retenue (50, 50') comportant une partie latérale (52, 52') et une partie de base (54, 54') s'étendant selon un angle aigu (X, x) par rapport à ladite partie latérale (52, 52') afin de retenir ledit moyen de diffuseur (40, 40') contre ladite seconde partie (16, 16'), mettant ainsi sensiblement à l'abri de fuites de carburant l'interface entre ledit moyen de diffuseur(40, 40') et ladite seconde partie (16, 16'), caractérisé en ce que ladite partie de base (54, 54') dudit moyen de retenue (50, 50') s'étend selon un angle aigu (X, x) par rapport à ladite partie latérale (52, 52'), ledit élément de retenue (50, 50') étant monté sur ledit corps d'injecteur (12, 12') et relié à celui-ci sous charge de sorte qu'une force de ressort est maintenue sur ledit moyen de diffuseur (40, 40') sensiblement à tous moments.
  2. Injecteur de carburant destiné à être utilisé dans un moteur à combustion interne selon la revendication 1, dans lequel ledit moyen de diffuseur (40, 40') comprend au moins une plaque de diffuseur en silicium (42, 44, 42') comportant en elle une ou plusieurs ouvertures (42a, 44a, 42a').
  3. Injecteur de carburant destiné à être utilisé dans un moteur à combustion interne selon la revendication 2, dans lequel au moins une plaque de diffuseur en silicium (42, 44, 42') comporte une forme sensiblement carrée.
  4. Injecteur de carburant destiné à être utilisé dans un moteur à combustion interne selon la revendication 3, dans lequel ladite partie latérale (52) dudit moyen de retenue (50) comprend une partie supérieure sensiblement cylindrique (52a) présentant un premier diamètre intérieur, une partie inférieure sensiblement cylindrique (52b) présentant un second diamètre intérieur, et une partie intermédiaire de liaison (52c) interposée entre celles-ci, ladite au moins une plaque de diffuseur en silicium (42, 44) étant située à l'intérieur de ladite partie inférieure cylindrique (52b) et ledit second diamètre intérieur de ladite partie inférieure étant sensiblement égal à chaque diagonale de ladite au moins une plaque de diffuseur en silicium (42, 44), maintenant ainsi ladite au moins une plaque de diffuseur en silicium en position correcte au-dessous de ladite seconde partie (16) dudit corps d'injecteur (12) et empêchant sensiblement ladite au moins une plaque de diffuseur en silicium (42, 44) d'effectuer des déplacements latéraux à l'intérieur dudit moyen de retenue (50).
  5. Injecteur de carburant destiné à être utilisé dans un moteur à combustion interne selon la revendication 2, dans lequel ladite seconde partie (16') dudit corps d'injecteur (12') comprend un évidement (19) formé dans celle-ci afin de recevoir ladite au moins une plaque de diffuseur en silicium (42'), et
       ladite partie de base (54') dudit moyen de retenue (50') sert à retenir ladite au moins une plaque de diffuseur (42') dans ledit évidement (19) en appliquant ladite force de ressort sur ladite plaque de diffuseur (42').
  6. Injecteur de carburant destiné à être utilisé dans un moteur à combustion interne selon la revendication 1, dans lequel ledit moyen de diffuseur (40) comprend deux plaques de diffuseur en silicium (42, 44), chacune ayant en elle une ou plusieurs ouvertures (42a, 44a).
  7. Injecteur de carburant destiné à être utilisé dans un moteur à combustion interne selon la revendication 1, dans lequel ladite partie de base (54, 54') dudit moyen de retenue (50, 50') est déformée contre ledit moyen de diffuseur (40, 40') avant que ledit moyen de retenue (50, 50') soit relié audit corps d'injecteur (12, 12') afin de créer ladite force de ressort.
  8. Injecteur de carburant destiné à être utilisé dans un moteur à combustion interne selon la revendication 1, dans lequel ledit moyen de retenue (50, 50') est relié par soudage audit corps d'injecteur (12, 12').
  9. Injecteur de carburant destiné à être utilisé dans un moteur à combustion interne selon la revendication 1, dans lequel ledit moyen de retenue (50, 50') est emboîté ou encliqueté sur ledit corps d'injecteur (12, 12').
EP19920300881 1991-03-08 1992-02-03 Injecteur de carburant avec ajustage en silicone Expired - Lifetime EP0503757B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66676491A 1991-03-08 1991-03-08
US666764 1991-03-08

Publications (3)

Publication Number Publication Date
EP0503757A2 EP0503757A2 (fr) 1992-09-16
EP0503757A3 EP0503757A3 (en) 1993-03-03
EP0503757B1 true EP0503757B1 (fr) 1995-03-22

Family

ID=24675369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920300881 Expired - Lifetime EP0503757B1 (fr) 1991-03-08 1992-02-03 Injecteur de carburant avec ajustage en silicone

Country Status (4)

Country Link
EP (1) EP0503757B1 (fr)
JP (1) JPH04325769A (fr)
CA (1) CA2061485A1 (fr)
DE (1) DE69201740T2 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2583593Y2 (ja) * 1993-01-14 1998-10-22 株式会社ゼクセル 燃料噴射ノズル
CA2115819C (fr) * 1993-02-17 2000-07-25 Yasuhide Tani Injecteur de fluide
WO1995004881A1 (fr) * 1993-08-06 1995-02-16 Ford Motor Company Injecteur de carburant
US5383597A (en) * 1993-08-06 1995-01-24 Ford Motor Company Apparatus and method for controlling the cone angle of an atomized spray from a low pressure fuel injector
JPH07289953A (ja) * 1994-03-03 1995-11-07 Nippondenso Co Ltd 流体噴射ノズル
JP3440534B2 (ja) * 1994-03-03 2003-08-25 株式会社デンソー 流体噴射ノズル
US5484108A (en) * 1994-03-31 1996-01-16 Siemens Automotive L.P. Fuel injector having novel multiple orifice disk members
JP3560174B2 (ja) * 1994-05-17 2004-09-02 株式会社デンソー 流体噴射ノズル及びそれを用いた燃料噴射弁
DE19547406B4 (de) * 1995-12-19 2007-10-31 Robert Bosch Gmbh Brennstoffeinspritzventil
US6783085B2 (en) * 2002-01-31 2004-08-31 Visteon Global Technologies, Inc. Fuel injector swirl nozzle assembly
US9670379B2 (en) * 2015-07-23 2017-06-06 The Boeing Company Composites transmissive to visual and infrared radiation and compositions and methods for making the composites

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3147219A1 (de) * 1981-11-28 1983-06-09 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur linearisierung der kennlinie eines ventils und ventil zur durchfuehren des verfahrens
JPS61104156A (ja) * 1984-10-26 1986-05-22 Nippon Denso Co Ltd 電磁式燃料噴射弁
US4647013A (en) * 1985-02-21 1987-03-03 Ford Motor Company Silicon valve
US4628576A (en) * 1985-02-21 1986-12-16 Ford Motor Company Method for fabricating a silicon valve
DE8802464U1 (fr) * 1988-02-25 1989-06-22 Robert Bosch Gmbh, 7000 Stuttgart, De
DE3911910A1 (de) * 1989-04-12 1990-10-18 Bosch Gmbh Robert Kraftstoffeinspritzventil
DE3927390A1 (de) * 1989-08-19 1991-02-21 Bosch Gmbh Robert Kraftstoffeinspritzventil

Also Published As

Publication number Publication date
DE69201740D1 (de) 1995-04-27
CA2061485A1 (fr) 1992-09-09
JPH04325769A (ja) 1992-11-16
EP0503757A3 (en) 1993-03-03
DE69201740T2 (de) 1995-07-13
EP0503757A2 (fr) 1992-09-16

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