WO2006096174A1 - Combinaison de guides d’abaissement de siege - Google Patents

Combinaison de guides d’abaissement de siege Download PDF

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Publication number
WO2006096174A1
WO2006096174A1 PCT/US2005/007470 US2005007470W WO2006096174A1 WO 2006096174 A1 WO2006096174 A1 WO 2006096174A1 US 2005007470 W US2005007470 W US 2005007470W WO 2006096174 A1 WO2006096174 A1 WO 2006096174A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat
closure member
longitudinal axis
fuel injector
housing
Prior art date
Application number
PCT/US2005/007470
Other languages
English (en)
Inventor
Gaetan Vich
Original Assignee
Siemens Vdo Automotive Corporation
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
Priority claimed from US11/072,459 external-priority patent/US7334746B2/en
Application filed by Siemens Vdo Automotive Corporation filed Critical Siemens Vdo Automotive Corporation
Priority to EP05724908A priority Critical patent/EP1856404B8/fr
Priority to JP2008500684A priority patent/JP2008531927A/ja
Priority to DE602005010911T priority patent/DE602005010911D1/de
Publication of WO2006096174A1 publication Critical patent/WO2006096174A1/fr

Links

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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • 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
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1826—Discharge orifices having different sizes
    • 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
    • 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector

Definitions

  • the invention relates generally to a fuel injector for an internal combustion engine, and more particularly to a fuel injector in which atomization and precision targeting of fuel can be altered so as to meet particular requirements for different engine configurations.
  • the fuel injector is typically mounted upstream of the intake valve in the intake manifold proximate a cylinder head. As the intake valve opens on an intake port of the cylinder, fuel is sprayed towards the intake port. In one situation, it may be desirable to target the fuel spray at the intake valve head or stem while in another situation, it may be desirable to target the fuel spray at the intake port instead of at the intake valve. In both situations, the targeting of the fuel spray can be affected by the spray pattern. Where the spray pattern has a large divergent cone shape, the sprayed fuel may impact on a surface of the intake port rather than towards its intended target. Conversely, where the spray pattern has a narrow divergent cone shape, the fuel may not atomize and may even recombine into a liquid stream. In either case, incomplete combustion may result, leading to an increase in undesirable exhaust emissions.
  • An electro-magnetic fuel injector typically utilizes a solenoid assembly to supply an actuating force to a fuel metering assembly.
  • the fuel metering assembly is a plunger-style closure member which reciprocates between a closed position, where the closure member is positioned in a seat to prevent fuel from escaping through a metering orifice into the combustion chamber, and an open position, where the closure member is lifted from the seat, allowing fuel to discharge through the metering orifice for introduction into the combustion chamber.
  • the closure member In reciprocating between the open and closed position, the closure member is positioned by a lower guide member that facilitates a proper contact with the seat.
  • the lower guide member and the seat are two separate parts that need to be properly aligned during assembly of the fuel injector. A misalignment of the two parts may cause leakage of the fuel injector that will adversely affect precision metering and targeting of the fuel. To prevent such misalignment, the lower guide member and the seat have been formed as one homogeneous member. However, in known homogeneous lower guide and seat members, atomization and precision targeting of fuel can not be altered so as to meet particular requirements for different engine configurations.
  • a preferred embodiment provides a fuel injector for an internal combustion engine, including a housing, a homogeneous member defining a continuous wall having a seat portion and a guide portion, a closure member, and a metering disk.
  • the housing includes an inlet and an outlet disposed along a longitudinal axis.
  • the homogeneous member is disposed proximate the outlet.
  • the seat portion includes a sealing surface and a seat orifice.
  • the closure member is disposed in the housing and positioned by the guide portion for reciprocal motion along the longitudinal axis between a first position such that the closure member is displaced from the seat, allowing fuel flow past the closure member, and a second position such that the closure member is contiguous the seat, precluding fuel flow past the closure member.
  • the metering disk is proximate the seat orifice.
  • Another preferred embodiment provides a method of manufacturing a fuel injector for an internal combustion engine.
  • the fuel injector includes a housing having an inlet and an outlet disposed along a longitudinal axis, and a closure member disposed in the housing.
  • the method includes providing a homogeneous member disposed proximate the outlet and defining a continuous wall having a seat portion and a guide portion.
  • the seat portion includes a sealing surface and a seat orifice.
  • the closure member is positioned by the guide portion and contiguous the seat portion.
  • the method includes providing a metering disk proximate the seat orifice, the metering disk having a plurality of metering orifices configured to form a spray pattern particular to the internal combustion engine.
  • Fig. 1 is a cross-sectional view of a fuel injector including a seat-lower guide combination, according to an embodiment of the invention.
  • Fig. 2 is an enlarged view of the seat-lower guide combination of Fig. 1.
  • FIG. 3 is a perspective view of the seat-lower guide combination, according to an embodiment of the invention.
  • Fig. 4 is cut-away view of the seat-lower guide combination of Fig. 3. Detailed Description Of The Preferred Embodiments
  • FIG. 1 A preferred embodiment of a fuel injector having a seat-lower guide combination 110 is illustrated in Fig. 1.
  • Fig. 2 is an enlarged view of the seat-lower guide combination 110 fixed to an outlet of the fuel injector.
  • the fuel injector includes: a fuel inlet tube 50, a stator 52, a non-magnetic shell 54, a valve body 56, a metering disc 112, an adjustment tube 58, a filter assembly 60, a coil spring 62, an armature 64, a closure member 66, an overmold 68, a coil assembly 70 and a coil assembly housing 72.
  • Fuel inlet tube 50, stator 52, non-magnetic shell 54, and valve body 56 are joined preferably by hermetic laser welds to form a fluid-tight flow path between the fuel injector inlet and the fuel injector outlet.
  • the seat-lower guide 110 is coupled at the outlet end of valve body 56 by a suitable coupling technique, such as, crimping, welding, bonding or riveting.
  • adjustment tube 58 has been positioned along longitudinal axis A-A within stator 52 to compress coil spring 62 to a desired bias force that urges the armature 64 and closure member 66 such that the rounded tip end of closure member 66 can be seated on a seat portion 114 of the seat-lower guide 110 to close an orifice 118.
  • Filter assembly 60 can be fitted proximate an open upper end of adjustment tube 58 to filter particulate matter from fuel passing through the fuel injector.
  • Coil assembly 70 includes a plastic bobbin 76 on which an electromagnetic coil 78 is wound.
  • Respective terminations of the coil 78 connect to respective terminals 80 that are shaped and, in cooperation with a surround 82 formed as an integral part of overmold 68, form an electrical connector for connecting the fuel injector to an electronic control circuit (not shown) that operates the fuel injector.
  • the fuel injector is initially at the non-injecting position shown in Fig. 1. In this position, a working gap 84 exists between the annular end face of stator 52 and the confronting annular end face of armature 64.
  • Non-magnetic shell 54 assures that when electromagnetic coil 78 is energized, the magnetic flux will follow a path that includes armature 64.
  • the magnetic circuit extends through valve body 56 to armature 64, and from armature 64 across the working gap 84 to stator 52, and back to housing 72.
  • electromagnetic coil 78 When electromagnetic coil 78 is energized, the spring force on armature 64 is overcome and armature 64 is attracted toward stator 52 reducing the working gap 84.
  • FIG. 3 illustrates a preferred embodiment of the seat-lower guide combination 110.
  • Fig. 4 is a cut-away view of the seat-lower guide combination 110.
  • seat-lower guide combination 110 is a homogeneous member formed as a continuous wall.
  • the continuous wall is formed of metal by a deep drawn manufacturing process.
  • the continuous wall may be formed of other materials and by other processes so long as a seat portion 114 and a guide portion 116 of the seat-lower guide combination 110 are properly aligned with respect to each other.
  • Guide portion 116 defines a cylinder disposed along the longitudinal axis A-A.
  • Seat portion 114 generally defines a conic frustum disposed along the longitudinal axis A-A, and having its base integrally formed with one end of guide portion 1 16, and its apex forming an orifice 118.
  • Passage holes 120 radially spaced about longitudinal axis A-A by equal intervals penetrate the seat- lower guide combination at a wall portion intermediate the guide portion and seat portion. As illustrated in Fig. 2, guide portion 116 properly positions the closure member 66 on seat portion 114 to form a fluid-tight seal between closure member 66 and seat portion 114.
  • the continuous wall of seat-lower guide combination 110 may further include a metering disk support portion 122 and a retaining portion 124, both being formed integrally with the guide portion and the seat portion.
  • Retaining portion 124 forms a fluid tight connection with an outer surface of valve body 56 proximate the outlet of the fuel injector, as illustrated in Fig. 2.
  • Portion 122 defines an annulus extending between the apex of seat portion 114 and the retaining portion 124, and supports the metering disk 112. As shown in Fig. 2 and Fig. 4, portion 122 extends radially outward at an oblique angle from longitudinal axis A-A and forms a chamber 126 with metering disk 112.
  • Metering disk 112 includes a plurality of orifices 128 to allow fuel to be discharged from the fuel injector. Different metering disks 112 having different size, shape, number and pattern of orifices 128 may be fixed to metering disk support portion 122 so that atomization and precision targeting of fuel can be altered to meet particular requirements for different engine configurations.
  • the seat-lower guide 110 can be used with the fuel injector/metering disk arrangements disclosed in co- pending application nos. 10/183,406 filed June 28, 2002; 10/183,392 filed June 28, 2002; 10/753,378 filed January 9, 2004; 10/753,481 filed January 9, 2004; and 10/753,377 filed January 9, 2004, which are incorporated by reference herein in the entirety.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne un injecteur de carburant pour un moteur à combustion interne, comprenant un carter, un élément homogène définissant une paroi continue ayant une partie de siège et une partie de guidage, un élément de fermeture et un disque doseur. Le carter comprend une entrée et une sortie disposées le long d’un axe longitudinal. L’élément homogène est disposé à proximité de la sortie. La partie de siège comprend une surface d’étanchéité et un orifice de siège. L’élément de fermeture est disposé dans le carter et positionné par la partie de guidage de façon à réaliser un mouvement de va-et-vient le long de l’axe longitudinal entre une première position telle que l’élément de fermeture est déplacé hors du siège, permettant l’écoulement de carburant à travers l’élément de fermeture et une seconde position telle que l’élément de fermeture est contigu au siège, bloquant le passage de carburant à travers l’élément de fermeture. Le disque doseur est situé à proximité de l’orifice du siège.
PCT/US2005/007470 2005-03-07 2005-03-08 Combinaison de guides d’abaissement de siege WO2006096174A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05724908A EP1856404B8 (fr) 2005-03-07 2005-03-08 Combinaison de guides d'abaissement de siege
JP2008500684A JP2008531927A (ja) 2005-03-07 2005-03-08 内燃機関用の燃料噴射器
DE602005010911T DE602005010911D1 (de) 2005-03-07 2005-03-08 Untere führungskombination für sitz

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/072,459 2005-03-07
US11/072,459 US7334746B2 (en) 2004-03-08 2005-03-07 Seat-lower guide combination

Publications (1)

Publication Number Publication Date
WO2006096174A1 true WO2006096174A1 (fr) 2006-09-14

Family

ID=34962228

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/007470 WO2006096174A1 (fr) 2005-03-07 2005-03-08 Combinaison de guides d’abaissement de siege

Country Status (4)

Country Link
EP (1) EP1856404B8 (fr)
JP (1) JP2008531927A (fr)
DE (1) DE602005010911D1 (fr)
WO (1) WO2006096174A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0718490A2 (fr) * 1994-12-23 1996-06-26 Robert Bosch Gmbh Soupape d'injection de combustible
US6131826A (en) * 1996-12-21 2000-10-17 Robert Bosch Gmbh Valve with combined valve seat body and perforated injection disk
US6173914B1 (en) * 1997-06-25 2001-01-16 Robert Bosch Gmbh Valve and method for producing a valve seat for a valve
WO2004097209A1 (fr) * 2003-05-02 2004-11-11 Robert Bosch Gmbh Soupape d'injection de carburant

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712922B4 (de) * 1997-03-27 2005-08-11 Robert Bosch Gmbh Brennstoffeinspritzventil
JPH10299605A (ja) * 1997-04-18 1998-11-10 Unisia Jecs Corp フューエルインジェクタ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0718490A2 (fr) * 1994-12-23 1996-06-26 Robert Bosch Gmbh Soupape d'injection de combustible
US6131826A (en) * 1996-12-21 2000-10-17 Robert Bosch Gmbh Valve with combined valve seat body and perforated injection disk
US6173914B1 (en) * 1997-06-25 2001-01-16 Robert Bosch Gmbh Valve and method for producing a valve seat for a valve
WO2004097209A1 (fr) * 2003-05-02 2004-11-11 Robert Bosch Gmbh Soupape d'injection de carburant

Also Published As

Publication number Publication date
DE602005010911D1 (de) 2008-12-18
EP1856404A1 (fr) 2007-11-21
JP2008531927A (ja) 2008-08-14
EP1856404B1 (fr) 2008-11-05
EP1856404B8 (fr) 2009-01-14

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