EP1586763B1 - Injecteur avec agencement de ressort ameliore - Google Patents

Injecteur avec agencement de ressort ameliore Download PDF

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Publication number
EP1586763B1
EP1586763B1 EP04252275A EP04252275A EP1586763B1 EP 1586763 B1 EP1586763 B1 EP 1586763B1 EP 04252275 A EP04252275 A EP 04252275A EP 04252275 A EP04252275 A EP 04252275A EP 1586763 B1 EP1586763 B1 EP 1586763B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
fuel injector
valve member
fuel
filter housing
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
EP04252275A
Other languages
German (de)
English (en)
Other versions
EP1586763A1 (fr
Inventor
Guy Krier
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP04252275A priority Critical patent/EP1586763B1/fr
Priority to DE602004006718T priority patent/DE602004006718T2/de
Priority to AT04252275T priority patent/ATE363595T1/de
Publication of EP1586763A1 publication Critical patent/EP1586763A1/fr
Application granted granted Critical
Publication of EP1586763B1 publication Critical patent/EP1586763B1/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
    • 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
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
    • 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
    • F02M61/08—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 the valves opening in direction of 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/507—Adjusting spring tension by screwing spring seats

Definitions

  • the present invention relates to a fuel injector with an improved spring guide and spring calibration adjusting feature.
  • the invention is particularly, but not exclusively, useful in solenoid actuated fuel injectors.
  • a solenoid actuated fuel injector for automotive engines is required to operate with a small and precise stroke in order to provide a fuel flow rate within a desired minimal tolerance level.
  • the fuel injector commonly involves a spring to bias the valve closed. Line production of fuel injector parts and springs naturally leads to the need for adjustment of the precise bias effect of each spring to a defined requirement.
  • Figure 1 is a diagrammatic and very simplified view of a fuel injector in the art, showing a central pintle 2 having a spring 4 around its upper part.
  • the spring 4 acts against a top flange 3 of the pintle 2 to close its bottom flange against the outflow seat 6 of the fuel injector.
  • a solenoid actuator 5 acts on an armature 8 secured to the pintle to move the pintle 2 against the bias force of the spring 4 during injection.
  • Figure 2 is a more detailed cross-sectional view of an upper part of a fuel injector, showing in more detail a spring 16, pintle 12, and the top flange (20) of the pintle 12.
  • the equivalent of the top flange 3 of Fig. 1 is provided by an adjusting washer 18 and a locking screw 14 engaged with a screw threaded portion of the pintle 12.
  • Figure 2 further shows the location of a filter 22 and filter housing 24 in the inlet part of the fuel injector, so as to filter incoming fuel.
  • the filter 22 and filter housing 24 must be removed.
  • the adjusting washer 18 is then turned to achieve the desired spring force and then locked in position by tightening the locking screw 14, suitably accompanied by the application of a suitable adhesive.
  • the filter 22 and filter housing 24 are then replaced.
  • the present invention which is defined in claim 1, facilitates the adjustment of biasing means of a fuel injector.
  • the adjustment may be effected without removing an inlet fuel filter, by using a fuel filter housing to effect adjustment.
  • preferred forms of the invention use a coil spring as biasing means and a sleeve provided for effecting adjustment also acts as a guide to prevent lateral movement of the spring.
  • FIG. 3 shows a detailed view of the upper portion of a fuel injector according to one embodiment of the present invention.
  • a tubular body 30 contains a central pintle 32, around which is a biasing spring 34.
  • the pintle 32 has a top flange 36 which may be formed by welding a disc-shaped extension to the top of the pintle 32.
  • At the top of the tubular body 30 there is a filter 38 and filter housing 40 similar to those of Figure 2.
  • a sleeve 42 extends from a threaded portion (44) at its lower end to a level near the top of an inner lining 46 of the body 30.
  • the threaded portion 44 engages with a threaded portion of a fixed part 48 of the fuel injector.
  • the top of the sleeve 42 is castellated.
  • the periphery of the filter housing 40 is formed with a cooperating shape, thus providing a rotary driving connection between these parts.
  • the sleeve 42 can be rotated within the tube 30 and inner lining 46 either directly, as access to the top of the sleeve 42 is significantly better than access to the adjusting washer 18 of Figure 2, or preferably by turning the filter housing 40 which engages directly with the top of the sleeve 42.
  • the distance between the lower end of the spring 34 and the pintle flange 36 is changeable because of the degree of extension of the threaded portion 44 into the fixed part 48.
  • the sleeve movement may be upward or downward, thus increasing and decreasing the spring tension as desired.
  • the filter housing 40 can be welded to the inner lining 46 to lock the position of the sleeve 42.
  • the sleeve 42 also provides a close or snug guide to the spring 34, so as to resist lateral flexing of the spring 34.
  • the present invention provides a simple and effective way to adjust the biasing force on a fuel injector valve member, whilst overcoming problems known in the art.
  • the invention may also be applied to other forms of valve member and other forms of actuation in fuel injectors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Nozzles (AREA)

Claims (7)

  1. Un injecteur de carburant destiné à être utilisé dans un moteur, comprenant :
    un corps (30) ayant une entrée de carburant et une sortie de carburant ;
    un siège de soupape dans la sortie et incluant une ouverture de décharge ;
    un élément de soupape (32) pouvant se déplacer dans le siège de soupape entre une position ouverte et une position fermée ;
    un moyen de décalage (34) pour décaler l'élément de soupape (32) en direction de sa position fermée ; un manchon (42) qui peut être ajusté entre des positions linéaires au moyen d'une rotation afin d'ajuster la force du moyen de décalage (34) contre l'élément de soupape (32) ; et un boîtier de filtre (40) au niveau de l'entrée caractérisé en ce que le boîtier de filtre est formé de façon correspondante avec le manchon afin de fournir une connexion d'entraînement en rotation avec ledit manchon (42) de telle sorte que la rotation dudit boîtier de filtre (40) ait pour résultat la rotation dudit manchon (42).
  2. Un injecteur de carburant tel que revendiqué dans la revendication 1 dans lequel le manchon (42) s'étend complètement ou substantiellement jusqu'à l'extrémité d'entrée de carburant du corps (30).
  3. Un injecteur de carburant tel que revendiqué dans la revendication 1 ou la revendication 2 dans lequel le manchon (42) a une portion filetée (44) au niveau de son extrémité inférieure pouvant se mettre en prise avec une partie fixe de l'injecteur grâce à quoi la rotation du manchon (42) amène un déplacement axial du manchon (42) par rapport au corps (30).
  4. Un injecteur de carburant tel que revendiqué dans la revendication 3 dans lequel le moyen de décalage comprend un ressort hélicoïdal (34) enfermé entre le manchon (42) et un flasque (36) assujetti à l'élément de soupape (32).
  5. Un injecteur de carburant tel que revendiqué dans la revendication 4 dans lequel le manchon (42) a un diamètre interne proche du diamètre externe du ressort hélicoïdal (34) pour faire office de guide pour ce dernier.
  6. Un injecteur de carburant tel que revendiqué dans n'importe lesquelles des revendications précédentes dans lequel l'élément de soupape (32) est une aiguille.
  7. Une méthode pour ajuster la force de décalage d'un moyen de décalage (34) sur un élément de soupape (32) dans un injecteur de carburant selon n'importe lesquelles des revendications 1 à 6, dans laquelle le manchon (42) est déplacé au moyen d'une rotation d'un boîtier de filtre au niveau de l'entrée afin d'ajuster la force de décalage.
EP04252275A 2004-04-17 2004-04-17 Injecteur avec agencement de ressort ameliore Expired - Lifetime EP1586763B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04252275A EP1586763B1 (fr) 2004-04-17 2004-04-17 Injecteur avec agencement de ressort ameliore
DE602004006718T DE602004006718T2 (de) 2004-04-17 2004-04-17 Einspritzdüse mit verbesserter Federanordnung
AT04252275T ATE363595T1 (de) 2004-04-17 2004-04-17 Einspritzdüse mit verbesserter federanordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04252275A EP1586763B1 (fr) 2004-04-17 2004-04-17 Injecteur avec agencement de ressort ameliore

Publications (2)

Publication Number Publication Date
EP1586763A1 EP1586763A1 (fr) 2005-10-19
EP1586763B1 true EP1586763B1 (fr) 2007-05-30

Family

ID=34930257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04252275A Expired - Lifetime EP1586763B1 (fr) 2004-04-17 2004-04-17 Injecteur avec agencement de ressort ameliore

Country Status (3)

Country Link
EP (1) EP1586763B1 (fr)
AT (1) ATE363595T1 (fr)
DE (1) DE602004006718T2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114563176B (zh) * 2022-04-27 2022-08-12 西安航天动力研究所 一种栓式喷注器及其针阀动特性测试装置和测试方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2986342A (en) * 1959-02-04 1961-05-30 Borg Warner Fuel injection nozzle
GB1586254A (en) * 1977-06-22 1981-03-18 Lucas Industries Ltd Fuel injection nozzle unit for supplying fuel to an internal combustion engine
DE3727366A1 (de) * 1987-08-17 1989-03-02 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE4131535A1 (de) * 1991-09-21 1993-03-25 Bosch Gmbh Robert Elektromagnetisch betaetigbares einspritzventil
JP2979467B2 (ja) * 1996-05-10 1999-11-15 株式会社ケーヒン 電磁式燃料噴射弁
US5944262A (en) * 1997-02-14 1999-08-31 Denso Corporation Fuel injection valve and its manufacturing method
US6328232B1 (en) * 2000-01-19 2001-12-11 Delphi Technologies, Inc. Fuel injector spring force calibration tube with internally mounted fuel inlet filter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE602004006718D1 (de) 2007-07-12
EP1586763A1 (fr) 2005-10-19
ATE363595T1 (de) 2007-06-15
DE602004006718T2 (de) 2008-01-24

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