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WO2004081366A1 - Soupape d'injection de carburant et procede d'assemblage de cette derniere - Google Patents

Soupape d'injection de carburant et procede d'assemblage de cette derniere Download PDF

Info

Publication number
WO2004081366A1
WO2004081366A1 PCT/DE2004/000100 DE2004000100W WO2004081366A1 WO 2004081366 A1 WO2004081366 A1 WO 2004081366A1 DE 2004000100 W DE2004000100 W DE 2004000100W WO 2004081366 A1 WO2004081366 A1 WO 2004081366A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
actuator
fuel injection
module
injection valve
Prior art date
Application number
PCT/DE2004/000100
Other languages
German (de)
English (en)
Inventor
Hubert Stier
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
Publication of WO2004081366A1 publication Critical patent/WO2004081366A1/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
    • F02M61/04—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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0057—Means for avoiding fuel contact with valve actuator, e.g. isolating actuators by using bellows or diaphragms

Definitions

  • the invention relates to a fuel injector according to the preamble of claim 1 and a method for assembling such a fuel injector according to claim 14.
  • DE 35 33 085 AI discloses a metering valve for metering liquids or gases, in particular an injection valve for fuel injection systems in internal combustion engines, which has a piezo stack actuator, the change in length of which is transmitted to a valve needle controlling a metering opening when an excitation voltage is applied, and determines the stroke of the valve needle.
  • the substance to be measured is fed via a feed line, which is designed in the form of a deep hole in the valve body.
  • a disadvantage of the injector known from DE 35 33 085 AI is that the housing of the injector is very solid and thus heavy and voluminous. It requires a large installation space and increased material and manufacturing costs. Another disadvantage is that the assembly of the fuel injector is time consuming and requires a large number of non-interchangeable process steps.
  • the fuel injector according to the invention with the characterizing features of claim 1 and the method for assembling a fuel injector with the features of claim 14 has the advantage that the fuel injector is constructed modularly from a valve module, an actuator module and a feed module, whereby on the one hand the fuel through the Is guided inside the fuel injector and a solid housing with a deep hole can be omitted and on the other hand a simple and inexpensive manufacture and assembly and a reliable reduction of sources of error is possible.
  • the housing is advantageously of tubular design and can be produced, for example, by deep drawing.
  • the housing is provided with elevations which protrude into the interior of the housing in such a way that the modules can be centered.
  • the elevations are arranged in two rows to center the respective module.
  • modules can be easily fixed to the housing by means of welds.
  • FIG. 1 shows a schematic section through a fuel injection valve according to the prior art
  • FIG. 2A shows a schematic section through a first exemplary embodiment of a fuel injector designed according to the invention
  • FIG. 2B shows a schematic section through the individual modules of the exemplary embodiment of a fuel injector designed according to the invention shown in FIG. 2A;
  • FIG. 2C shows a detail from the first exemplary embodiment shown in FIG. 2A of a fuel injector designed according to the invention in the area IIC in FIG. 2A;
  • FIGS. 2A-2C shows a schematic section and the valve housing of the exemplary embodiment illustrated in FIGS. 2A-2C and
  • 3B shows a schematic section through the valve housing of a second exemplary embodiment of a fuel injector designed according to the invention.
  • Fuel injector 1 shown in FIG. 1 is in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injection valve 1 comprises a housing 2, in which a piezoelectric or magnetostrictive actuator 4 provided with an actuator coating 3 is arranged.
  • An electrical voltage can be supplied to the actuator 4 by means of an electrical line 5, on which an electrical connection 6 protruding from the housing 2 can be formed.
  • the actuator 4 is supported on the inflow side on an actuator base 7 and on the outflow side on an actuator head 8.
  • a biasing spring 9 acts on the actuator 4 with a bias.
  • the bias is adjustable by a ring 20 inserted into the housing 2.
  • a seal 21 which is designed as a corrugated tube seal in the exemplary embodiment, is arranged. This seals the actuator 4 against the fuel flowing through the fuel injection valve 1.
  • the housing 2 has a bore 10, which is used for the fuel line from an inlet connection 11 to a sealing seat of the fuel injector 1 described in more detail below.
  • the bore 10 is made in the housing 2 parallel to the actuator 4 and made in two parts.
  • a first section 12 is introduced obliquely into the housing 2 and extends from the inlet connection 11 to a second section 13, which extends in a straight line through the housing 2 over its entire axial extent.
  • the reason for the two-part design is the impossibility of producing a kinking bore 10 inexpensively and simply in one operation.
  • the second section 13 is closed on the inflow side of an opening 14 into the first section 12 with a closure body 15.
  • An actuating element 16 is arranged on the outflow side of the actuator head 8 and acts on a master piston 17 of a hydraulic coupler 18.
  • a slave piston 19 is arranged on the outflow side of the master piston 17 and is arranged together with the latter in a coupler housing 22.
  • the slave piston 19 acts on a valve needle 23, which has a valve closing body 24 at its downstream end. This interacts with a valve seat surface 25, which is formed on a nozzle body 26, to form a sealing seat.
  • a return spring 27 acts on the valve needle 23 so that the fuel injector 1 remains in the closed state when the actuator 4 is deenergized and after the injection phase ensures the resetting of the valve needle 23.
  • a tension screw 28 holds the nozzle body 26 in its position in the housing 2 of the fuel injector 1.
  • a disadvantage of the described fuel injection valve 1 according to the prior art is the solid housing 2, which must have a minimum wall thickness so that a bore 10 with a sufficient diameter can be made. As a result, the fuel injector 1 is very solid. A corresponding receiving bore in a cylinder head of the internal combustion engine must also be large enough to accommodate the fuel injector 1. Furthermore, the assembly of the fuel injector 1 is labor-intensive and therefore cost-intensive.
  • 2A to 2C show different parts of a first exemplary embodiment of a fuel injector 1 according to the invention, which is of modular construction.
  • a coupler module 30 is shown below, which essentially consists of a nozzle body 26.
  • a valve needle 23 is arranged in the nozzle body 26 and has a valve closing body 24 at its downstream end, which forms a sealing seat with a valve seat surface 25 formed on the nozzle body 26.
  • the valve needle 23 is operatively connected to a slave piston 19 of a hydraulic coupler 18.
  • the slave piston 19 is open in a pot shape in the outflow direction.
  • a return spring 27 is arranged, which holds the valve closing body 24 in the non-actuated state of the fuel injector 1 in sealing contact with the valve seat surface 25.
  • a master piston 17 On the inflow side of the slave piston 19, a master piston 17 is arranged, which is also cup-shaped. Between a collar 31, which is formed on the master piston 17, and the nozzle body 26, a coupler spring 32 is arranged, which returns the hydraulic coupler 18 to its starting position after the fuel injector 1 has been actuated.
  • a bore 33 is provided on the outflow side of the slave piston 19, through which the fuel supplied via a fuel supply (not shown in FIG. 2A) is guided to the sealing seat.
  • the coupler module 30 can be assembled in a simple manner by inserting the valve needle 23 into the nozzle body 26 and connecting it from the inflow side to the slave piston 19, in which the return spring 27 is inserted, by pressing or welding. Thereafter, the one with the coupler spring 32 is also provided on the inflow side Master piston 17 in the nozzle body 26, which thus also as
  • Coupler housing is used, inserted.
  • the coupler module 30 is thus preassembled and its function can be checked independently of the other components of the fuel injector 1.
  • the actuator module 34 which can also be preassembled, is shown at the top in FIG. 2B.
  • the actuator module comprises a piezoelectric or magnetostrictive actuator 4, which is provided with an actuator coating 3 for better heat dissipation.
  • the actuator 4 is supported on the inflow side on an actuator base 7 and on the outflow side on an actuator head 8.
  • the actuator 4 is encapsulated in an actuator cartridge 35, in which a biasing spring 9 is additionally arranged, which biases the actuator 4.
  • an actuating element 16 is provided, which acts on the master piston 17 of the coupler module 30 after complete assembly.
  • the actuator cartridge 35 is sealed by a seal 21, which can be designed, for example, as a corrugated tube seal 21.
  • the actuator base 7 has a bore 36 and at least one, in the exemplary embodiment two, radial bores 37 which serve for the fuel line.
  • the assembly of the actuator module 34 is also simple and can be carried out in a few steps.
  • the bias spring 9 is inserted into the actuator cartridge 35, then the actuating element 16 is mounted with the actuator head 8.
  • the seal 21 is welded to the actuator cartridge 35, for example.
  • the actuator 4 is inserted into the actuator cartridge 35 and the actuator base 7 is placed on it.
  • the actuator cartridge 35 can be welded to the actuator base 7, for example.
  • the actuator overmolding 3 can take place.
  • the actuator module can now also be checked independently of the other components of the fuel injector 1.
  • the coupler module 30 is first inserted into the housing 2 until it abuts a shoulder 38 of the housing 2.
  • the nozzle body 26 passes through an opening 39 in the downstream end of the housing 2.
  • the components are fixed, for example by a first weld 40.
  • the actuator module 34 is pushed into the housing.
  • the axial position of the actuator module 34 relative to the coupler module 30 can be adjusted either by an adjusting disk 41 to be inserted into the master piston 17 of the hydraulic coupler 30 during preassembly or by means of an axial displacement of the coupler module 30 in the housing 2 and subsequent fixation by a second weld 42 in the desired one Position.
  • the fixation by the second weld 42 is shown in more detail in the section shown in FIG. 2C, designated IIC in FIG. 2A.
  • the weld seam 42 fixes both the actuator module 34 in its axial position and the actuator module 34 on the housing 2.
  • a tube 44 with a connecting piece 45 is inserted into the bore 36 and up to the actuator base 7, which, like the connecting piece 45, has a labyrinth seal 46, is provided with a plastic encapsulation 47, into which an electrical connection 29 can also be integrated.
  • the housing 2 can be compared, as in FIG. 3A 3A, also regularly distributed over the circumference of the housing 2 and having elevations 49 protruding into an interior 48 of the housing 2, which elevations flow between the actuator cartridge 35 and the housing 2 or between the nozzle body 26 and the housing 2 Do not hinder fuel flowing to the sealing seat, but allow exact centering of the modules 30 and 34.
  • the elevations 49 are preferably arranged in two rows 50, each of which is arranged such that a row of elevations 49 is available for centering per module 30, 34.
  • the invention is not restricted to the exemplary embodiments shown and is suitable for any designs of fuel injection valves 1.

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

Abstract

L'invention concerne une soupape d'injection de carburant (1), en particulier une soupape d'injection de carburant (1) destinée à des systèmes d'injection de carburant de moteurs à combustion interne. Cette soupape comprend un actionneur piézoélectrique ou magnétostrictif (4), un corps (2), un élément de fermeture de soupape (29) installé dans ledit corps (2), lequel élément coopère avec une surface de siège de soupape (30) pour former un siège étanche, ainsi qu'un coupleur hydraulique (18). Ledit actionneur (4) est installé dans un module d'actionneur (34) pouvant être préassemblé et le coupleur hydraulique (18) est installé dans un module de coupleur (30) pouvant être préassemblé.
PCT/DE2004/000100 2003-03-12 2004-01-23 Soupape d'injection de carburant et procede d'assemblage de cette derniere WO2004081366A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003110788 DE10310788A1 (de) 2003-03-12 2003-03-12 Brennstoffeinspritzventil und Verfahren zu dessen Montage
DE10310788.6 2003-03-12

Publications (1)

Publication Number Publication Date
WO2004081366A1 true WO2004081366A1 (fr) 2004-09-23

Family

ID=32892079

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2004/000100 WO2004081366A1 (fr) 2003-03-12 2004-01-23 Soupape d'injection de carburant et procede d'assemblage de cette derniere

Country Status (2)

Country Link
DE (1) DE10310788A1 (fr)
WO (1) WO2004081366A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004010183A1 (de) * 2004-03-02 2005-09-29 Siemens Ag Einspritzventil
DE102005024049A1 (de) * 2005-05-25 2006-11-30 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung, insbesondere für eine Brennkraftmaschine mit Kraftstoff-Direkteinspritzung
DE102005025147B4 (de) * 2005-06-01 2014-11-06 Continental Automotive Gmbh Kraftstoffinjektor mit Gehäuse, sowie Verfahren zum Fertigstellen und Beschriften des Gehäuses
DE102007008618A1 (de) * 2007-02-22 2008-08-28 Robert Bosch Gmbh Piezoaktormodul mit einer Kabeldurchführung
HUE031216T2 (hu) * 2011-12-01 2017-07-28 Svm Schultz Verwaltungs-Gmbh & Co Kg Elektromágneses mûködtetésû szelep

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19950760A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19958704A1 (de) * 1999-12-06 2001-06-13 Siemens Ag Vorrichtung zum Übertragen einer Aktorbewegung und Fluiddosierer mit einer solchen Vorrichtung
DE10046323A1 (de) * 2000-09-19 2002-04-18 Siemens Ag Geschlossenes Hydrauliksystem
DE10133265A1 (de) * 2001-07-09 2003-01-23 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10145620A1 (de) * 2001-09-15 2003-04-24 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4119467C2 (de) * 1991-06-13 1996-10-17 Daimler Benz Ag Nach dem Verdrängerprinzip arbeitende Vorrichtung zur Kraft- und Hubübersetzung bzw. -übertragung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19950760A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19958704A1 (de) * 1999-12-06 2001-06-13 Siemens Ag Vorrichtung zum Übertragen einer Aktorbewegung und Fluiddosierer mit einer solchen Vorrichtung
DE10046323A1 (de) * 2000-09-19 2002-04-18 Siemens Ag Geschlossenes Hydrauliksystem
DE10133265A1 (de) * 2001-07-09 2003-01-23 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10145620A1 (de) * 2001-09-15 2003-04-24 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten

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Publication number Publication date
DE10310788A1 (de) 2004-09-23

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