EP1350947A2 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

Info

Publication number
EP1350947A2
EP1350947A2 EP20030001838 EP03001838A EP1350947A2 EP 1350947 A2 EP1350947 A2 EP 1350947A2 EP 20030001838 EP20030001838 EP 20030001838 EP 03001838 A EP03001838 A EP 03001838A EP 1350947 A2 EP1350947 A2 EP 1350947A2
Authority
EP
European Patent Office
Prior art keywords
guide
valve
fuel
fuel injection
closing 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.)
Granted
Application number
EP20030001838
Other languages
German (de)
English (en)
Other versions
EP1350947A3 (fr
EP1350947B1 (fr
Inventor
Joerg A. Heyse
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.)
Robert Bosch GmbH
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 EP1350947A2 publication Critical patent/EP1350947A2/fr
Publication of EP1350947A3 publication Critical patent/EP1350947A3/fr
Application granted granted Critical
Publication of EP1350947B1 publication Critical patent/EP1350947B1/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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • 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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • 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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • F02M51/0678—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
    • 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
    • F02M61/18—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

Definitions

  • the invention is based on a fuel injector according to the genus of the main claim.
  • the sealing effect of the Guide body in interaction with the valve closing body should last for the entire life of the Make sure that the fuel injection valve Swirl development in the swirl chamber is not permitted large inflow of swirled fuel from the Lead gap between the guide body and Valve closing body is significantly affected as otherwise the spray pattern or the spray angle in the Heated fuel cloud impermissible changed. Because wear and manufacturing tolerances differ from Do not let guide body and valve needle tip be avoided, they have to be considered. Because the swirl development or the twist intensity due to the design features of the fuel injector is fixed and a certain fuel leakage from swirled fuel taken into account, the increase in leakage from unswirled fuel due to wear and tear of the Leadership gap only move within certain narrow limits.
  • the fuel injector according to the invention with the characteristic features of the main claim has the Advantage that it causes lower manufacturing costs because the leadership game of leadership, which consists of a Guide section of the valve closing body and the Guide body is formed, a larger one May have manufacturing tolerance without a impermissibly large spread of leakage from unswirled Fuel in the swirl chamber develops during operation and / or due to manufacturing tolerances. This will achieved by the flow channels according to the invention, the increase the leakage flow and cause changes in the Leakage due to manufacturing tolerances and / or increases in Leakage due to wear in the course of the guide compared to Total fuel flow is less significant and thus less impact on swirl development.
  • the invention can be particularly advantageous in Spherical fuel injectors Valve closing bodies are used. With such valves is the hydraulic seal, due to the short Guide section of the valve closing body through the Sphere equator is formed, and the resulting short Sealing length of the guide course, increased depending on Guide play. With such valves the increase in flow is without the inventive measure with initially small Leading game due to the expansion of the game Wear increases exponentially. Also a leadership game widened by manufacturing tolerances causes an increased exponentially increased flow through the guide gap.
  • valve according to the invention causes less Manufacturing costs because the manufacturing tolerances are more generous can be chosen without an impermissible Impairment of the swirl development are accepted have to.
  • the cross section of the or Flow channels dimensioned so large that the turning point, from the increase in flow of the leakage current over the Leadership game no longer rises, but falls, already at the beginning of the life of the fuel injector has been reached or exceeded.
  • the flattening function the influence of manufacturing tolerances and wear in the area of the management course that from a guide portion of the valve closing body and the Guide body is formed, further reduced.
  • the guide body can be especially the manufacture easier to adapt to manufacturing conditions.
  • Circular segmental flow channels so-called surface grinding, can be particularly advantageous on spherical Realize valve closing bodies.
  • the first embodiment shown in FIG Fuel injector 1 is in the Form of a fuel injector 1 for Fuel injection systems from mixture-compressing, spark-ignition internal combustion engines.
  • the Fuel injection valve 1 is particularly suitable for not directly injecting fuel into one Shown combustion chamber of an internal combustion engine.
  • the fuel injector 1 consists of a Nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 stands with a valve closing body 4 in Active connection with one on a valve seat body 5 arranged valve seat surface 6 to a sealing seat interacts.
  • the fuel injector 1 is acting it is an inward opening in the exemplary embodiment Fuel injector 1.
  • the nozzle body 2 is against the by a seal 8 Sealed outer pole 9 of a magnetic coil 10.
  • the solenoid 10 is encapsulated in a coil housing 11 and on one Coil carrier 12 wound, which on an inner pole 13 of the Solenoid 10 is present.
  • the inner pole 13 and the outer pole 9 are separated from each other by a gap 26 and support itself on a connecting component 29.
  • the solenoid 10 is via a line 19 from an electrical Plug contact 17 energized electrical current.
  • the Plug contact 17 is from a plastic sheath 18 surrounded, which may be molded onto the inner pole 13.
  • the valve needle 3 is in a valve needle guide 14 led, which is disc-shaped.
  • a paired shim 15 is used for stroke adjustment the other side of the shim 15 is a Anchor 20.
  • This stands over a first flange 21 non-positively in connection with the valve needle 3, which through a weld seam 22 with the first flange 21 connected is.
  • One is supported on the first flange 21 Return spring 23, which in the present design of the Fuel injector 1 through a sleeve 24 Bias is brought.
  • a second flange 31, which with the valve needle 3 over a weld 33 is connected serves as the lower one Armature stop.
  • Fuel channels 30a and 30b Run in the valve needle guide 14 and in the armature 20 Fuel channels 30a and 30b.
  • the fuel is about one central fuel supply 16 and supplied by a Filter element 25 filtered.
  • a swirl device 42 forming swirl disk 43 are swirl channels 34 both for Fuel line and also provided for swirl generation.
  • the fuel injector 1 is through a seal 28 against a fuel supply not shown and a seal 41 against a not shown Sealed cylinder head.
  • valve needle 3 If the coil current is switched off, the armature 20 falls sufficient degradation of the magnetic field by the force of the Return spring 23 from the inner pole 13, whereby the valve needle 3 is in operative connection with the flange 21 moved against the stroke direction. The valve needle 3 will thereby moving in the same direction, causing the Valve closing body 4 is placed on the valve seat 6 and the fuel injector 1 is closed.
  • the part shown enlarged in Fig. 2 spray-side end of the fuel injector according to the invention 1 from FIG. 1 includes in particular a Valve seat body 5, swirl channels 34, a swirl chamber 35, the Guide body 37 and a cylindrical Valve closing body 4 with flow channels 36
  • Inflow of the fuel into the swirl chamber 35 forms a circumferentially directed swirl flow. simultaneously causes the negative pressure created in the swirl chamber 35, that through the leadership course that comes from the leadership section 38 of the valve closing body 4 and the guide body 37 is formed, fuel is sucked in in small quantities which is located upstream of the guide body 37.
  • the flow channel extends 36 beyond the course of the management to increase the flow ensure the untwisted flow portion.
  • the Valve closing body 4 is in this embodiment cylindrical, and the flow channels 36 are introduced in the valve closing body 4, axially extending Grooves.
  • Fig. 3 shows a schematic sectional view second embodiment of the invention Fuel injector 1 similar to the first Embodiment, but with a spherical Valve closing body 4.
  • Fuel injector 1 similar to the first Embodiment, but with a spherical Valve closing body 4.
  • Fuel injector 1 similar to the first Embodiment, but with a spherical Valve closing body 4.
  • Fuel into swirl chamber 35 through swirl channels 34 a negative pressure
  • the fuel flows through the Leading gap 40, which results from the leading game between Guide body 37 and the guide portion 38 of the Valve closing body 4 results, and also by the shown flow channels 36.
  • the flow channels 36 are the flow channels 36 as Surface grinding on the spherical valve closing body 4 introduced.
  • Fig. 4 shows a third embodiment of the fuel injector 1 according to the invention in which the flow channels 36 along the inner surface of the Guide opening 39 introduced into the guide body 37 are.
  • the invention is not shown on the Embodiments limited and z. B. for any Designs of fuel injection valves 1, in particular also for outward opening fuel injection valves 1, applicable.
  • Fig. 5 shows the static flow rate Q Stat through the guide area as a function of the guide clearance sp for fuel injection valves 1.
  • Fuel injection valves 1 without the flow channels 36 according to the invention are located in area I of FIG. 5, ie below the turning point sp w , so that an increase in the Guide play sp leads to an increase in the increase in the static flow rate dQ Stat / dsp.
  • the flow channels 36 according to the invention shift into region II above the inflection point sp w .
  • a wear-related increase in the play sp is associated with a decrease in the increase in the static flow rate dQ Stat / dsp, so that the wear has a less serious effect.

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)
EP20030001838 2002-04-04 2003-01-29 Injecteur de carburant Expired - Lifetime EP1350947B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002114904 DE10214904A1 (de) 2002-04-04 2002-04-04 Brennstoffeinspritzventil
DE10214904 2002-04-04

Publications (3)

Publication Number Publication Date
EP1350947A2 true EP1350947A2 (fr) 2003-10-08
EP1350947A3 EP1350947A3 (fr) 2004-05-12
EP1350947B1 EP1350947B1 (fr) 2006-01-11

Family

ID=27816140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030001838 Expired - Lifetime EP1350947B1 (fr) 2002-04-04 2003-01-29 Injecteur de carburant

Country Status (2)

Country Link
EP (1) EP1350947B1 (fr)
DE (2) DE10214904A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1541862A1 (fr) * 2003-12-10 2005-06-15 Robert Bosch Gmbh Injecteur de carburant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142051A (ja) * 1983-12-28 1985-07-27 Toyota Motor Corp 内燃機関の燃料噴射弁
JP2819702B2 (ja) * 1989-12-12 1998-11-05 株式会社デンソー 燃料噴射弁
DE10059009A1 (de) * 2000-11-28 2002-05-29 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE10063261B4 (de) * 2000-12-19 2005-09-01 Robert Bosch Gmbh Brennstoffeinspritzventil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1541862A1 (fr) * 2003-12-10 2005-06-15 Robert Bosch Gmbh Injecteur de carburant

Also Published As

Publication number Publication date
EP1350947A3 (fr) 2004-05-12
DE10214904A1 (de) 2003-10-16
DE50302146D1 (de) 2006-04-06
EP1350947B1 (fr) 2006-01-11

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