EP1953381B1 - Niederhalter für eine Brennstoffeinspritzvorrichtung - Google Patents

Niederhalter für eine Brennstoffeinspritzvorrichtung Download PDF

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Publication number
EP1953381B1
EP1953381B1 EP08103737A EP08103737A EP1953381B1 EP 1953381 B1 EP1953381 B1 EP 1953381B1 EP 08103737 A EP08103737 A EP 08103737A EP 08103737 A EP08103737 A EP 08103737A EP 1953381 B1 EP1953381 B1 EP 1953381B1
Authority
EP
European Patent Office
Prior art keywords
hold
down member
fuel injection
injection valve
base element
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.)
Active
Application number
EP08103737A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1953381A1 (de
Inventor
Thilo Bolz
Thomas Fuerst
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 EP1953381A1 publication Critical patent/EP1953381A1/de
Application granted granted Critical
Publication of EP1953381B1 publication Critical patent/EP1953381B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • 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
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa

Definitions

  • the invention is based on a hold-down device for a fuel injection device according to the preamble of claim 1.
  • a fastening device for a fuel injection valve for attachment to a suction tube in which the axial fixation of the fuel injection valve on the fuel distributor line or on a plug-in nipple by a fastener, which is designed as a U-shaped securing clip provided with two resiliently resilient legs is.
  • the securing clip engages in the mounted state by corresponding recesses of the plug-in nipple and can be latched into a recess formed as an annular groove in a connecting piece of the fuel injection valve.
  • the axial clearance between the recesses and the securing clip as well as between the annular groove and the securing clip should be kept small in order to achieve an exact fixation of the fuel injection valve without tension of the seal.
  • a disadvantage of the DE 29 26 490 A1 known fastening device is in particular the bracing effect of the various mounting parts on the fuel injection valve.
  • the force flow generated in the fuel injection valve leads to deformations and thus to changes in the stroke of the valve needle to jamming and to a pressure or bending load of the housing parts, which are generally thin-walled and welded together at several points.
  • every attachment measure for example, by a support collar to increase the radial extent of the fuel injection valve and thus to an increased space requirement during installation.
  • the fastening device comprises a sleeve which is clamped between a shoulder of the fuel rail and a shoulder of the fuel injection valve and is formed of an elastic material. Due to its tubular structure, the sleeve can transfer the hold-down forces to the fuel injector only to a limited extent effectively.
  • the claimed by the shoulders of the fuel injector and fuel rail surfaces of serving as hold down sleeve represent the manufacturing edges resulting in the production of the blank of the sleeve cutting edges.
  • the DE 199 53 269 A1 and the DE 101 51 004 A1 show a hold-down according to the preamble of claim 1.
  • the hold-down device according to the invention for a fuel injection device with the characterizing features of claim 1 has the advantage that it has a particularly simple design, is very simple and inexpensive to produce and still a very effective holddown of a fuel injector in a receiving bore of a cylinder head or an intake pipe is achieved.
  • conventional manufacturing processes such as stamping, eroding or laser cutting, blanks for the subsequent hold-down can be removed from sheets of spring steel or stainless steel and bent into numerous, quite complex desired shapes.
  • the hold-down device in the circumferential direction with an open area in such a way that it is penetrated by the connection plug of the fuel injection valve, so that an unambiguous installation position is defined for the hold-down device.
  • a Verwarfix ist the blank holder relative to the connection piece is eliminated by the mating pin / recess on the fuel injector / nozzle.
  • the holding-down device is mounted on the fuel injection valve in such a way that a hold-down clip subjected to bending stress is directed away from the connection plug of the fuel injection valve.
  • FIG. 1 a partially illustrated fuel injection device with a first non-inventive hold-down in a side view
  • FIG. 2 the fuel injection device according to FIG. 1 in a perspective view, however, with non-inventive hold-down
  • FIG. 3 A second example of a fuel injection device in a perspective view
  • FIG. 4 in the fuel injectors of FIGS. 1 to 3 used not inventive Hold-down as a single component
  • FIG. 5 an inventive embodiment of a hold-down
  • FIG. 6 a non-inventive embodiment of a hold-down.
  • FIG. 3 is a side view of a valve in the form of an injection valve 1 for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • the fuel injection valve 1 is part of a fuel injection device. With a downstream end, the fuel injection valve 1, which is designed in the form of a direct-injection injector for injecting fuel directly into a combustion chamber of the internal combustion engine, is installed in a receiving bore of a cylinder head, not shown.
  • a sealing ring 2, in particular of Teflon®, ensures optimum sealing of the fuel injection valve 1 with respect to the wall of the cylinder head.
  • the valve receptacle can also be provided on a receiving socket of a suction pipe, not shown.
  • the fuel injection valve 1 has at its inlet-side end 3 a plug connection to a fuel distributor line 4, which is sealed by a sealing ring 5 between a connection piece 6 of the fuel distributor line 4, which is shown in section, and an inlet connection 7 of the fuel injection valve 1.
  • the fuel injection valve 1 has an electrical connection plug 8 for the electrical contacting for actuating the fuel injection valve 1.
  • a holding-down device 10 is provided between the fuel injection valve 1 and the connecting piece 6.
  • the hold-down 10 is designed as a bow-shaped component, for example as a stamped and bent part.
  • the hold-down 10 has a part-ring-shaped base element 11, wherein this base element 11, which does not rotate through 360 °, but for example has only an extension of about 250 ° to 320 °, is supported on a shoulder 12 of the fuel injection valve 1.
  • axially resilient hold-down bracket 13 is the hold-down 10 at a downstream end surface 14 of the connecting piece 6 to the fuel rail 4 in the installed state.
  • the hold-down 10 is interrupted, wherein the hold-down 10 forms a closed bracket element, in particular the FIGS. 2 to 4 clarify. In this way, the hold-down 10 can surround the fuel injector 1 and still allows the passage of the electrical connector plug 8.
  • the hold-down bar 13 protrudes with its resilient brackets from the connector 8 away.
  • a pin-shaped raised pin 15 is provided on the fuel injector 1, which corresponds to a groove-like depression or recess 16 at the connecting piece 6 of the fuel manifold 4.
  • the projecting into the recess 16 pin 15 of the fuel injector 1 ensures a direct and thus very secure rotation of the fuel injector 1 relative to the fuel rail 4 and for a reliable assignment of the rotational position of the blank holder 10 to the fuel injector 1.
  • the recess 16 on the connecting piece 6 of the fuel distributor line 4 extends from the end face 14 and extends in slot-like or groove-like manner in the axial direction.
  • the recess 16, which is introduced, for example, by machining, has such an axial extent that the pin 15 of the fuel injection valve 1 can be received in full length.
  • FIG. 2 is the fuel injection device according to FIG. 1 shown in a perspective view. This illustration particularly clarifies the mounting position of the hold-down 10 between the shoulder 12 and the end face 14 and the engagement of the pin 15 in the recess 16.
  • FIG. 3 in a perspective view shown second example of a fuel injection device differs from the in FIG. 2 illustrated example, especially in the execution of the connecting piece 6 and the recess 16.
  • the connecting piece 6 of the fuel distributor line 4 has at its downstream end an annular projecting collar 19 on which the end face 14 is formed to bear the hold 10 with its hold-down bracket 13 and in which the recess 16 is formed.
  • the groove-like recess 16 is completely penetrated by the pin 15 in the installed state of the fuel injection valve 1.
  • the recess 16 is introduced by means of punching or by machining.
  • FIGS. 4 to 6 For example, three forms of hold-downs 10 are shown, with the in FIG. 4 shown as a single component hold-down 10 in the fuel injectors of FIGS. 1 to 3 used holdings corresponds to 10. All forms are characterized by the fact that, starting from a planar part-ring-shaped base element 11, at least one bent, axially resilient hold-down bracket 13 extends out of the plane of the base element 11.
  • the connector 8 of the fuel injection valve 1 extends through the open area 20 of the base element 11 of the hold-down 10.
  • the base element 11 can be substantially circular (FIG. FIGS. 4 and 5 ) or depending on the shape of the fuel injection valve 1, for example pear-shaped ( FIG. 6 ) or similar in cross section.
  • the base member 11 is made flat, for example, with a thickness of about 1.5 mm, so that a large bearing surface on the shoulder 12 is present.
  • the basic elements 11 of the hold-down 10 of the FIGS. 5 and 6 upright, for example, in turn, with a wall thickness of about 1.5 mm, but thus also dictates the small width of the support surface of the respective base member 11 on the shoulder 12.
  • the hold-down 10 represents a closed bracket member, since the hold-down bar 13 is connected endlessly to the base member 11. From the base member 11, two webs 21 extend with increased width largely in the axial direction and thus substantially perpendicular to the plane of extension of the base member 11. These webs 21 go kinked into the actual axially resilient hold-down bracket 13, wherein the hold-down bracket 13 composed of three essential sections.
  • the hold-down bar 13 has, starting from the webs 21, only a small axial extent, which results from two uniform oblique sections 22.
  • the oblique sections 22 merge into slightly curved contact sections 23 which, in the installed state, ultimately have touching contact with the end face 14 of the connecting piece 6.
  • a connecting portion 24 is provided, which is carried out slightly lowered relative to the abutment portions 23 and ensures that the entire hold-down device 10 is closed.
  • the circumferential extent of the hold-down strap 13 with its sections 22, 23 and 24 largely corresponds to that of the base element 11, but in a different axial plane, caused by the height of the webs 21st
  • the hold-down device 10 In contrast to the hold-down device 10 described above, the hold-down device 10 according to FIGS. 5 and 6 no connection portion 24, so that an overall open holddown 10 is present.
  • two webs 21 From the base element 11 in turn two webs 21 extend substantially in the axial direction and thus substantially perpendicular to the plane of extension of the base member 11.
  • the webs 21 extend with respect to their wall thickness twisted relative to the base member 11, wherein the transition region 25 inward ( FIG. 6 ) or outside ( FIG. 5 ) can be turned.
  • the webs 21 may have a curved, for example S-shaped configuration.
  • the webs 21 go over bent into the actual axially resilient hold-down bar 13, wherein the hold-down bar 13 composed of two sections.
  • the oblique sections 22 merge into slightly curved contact sections 23 which, in the installed state, ultimately have touching contact with the end face 14 of the connecting piece 6.
  • the two abutment portions 23 of each blank holder 10 terminate the two-part hold-down bracket 13 in this way.
  • the upstanding base element 11 of the hold-down 10 has a height that is smaller than the distance between the abutment portions 23 of the hold-down bracket 13 and the base element 11, whereby despite low material costs a big one Distance during clamping of the blank holder 10 between the shoulder 12 of the fuel injection valve 1 and the end surface 14 of the connecting piece 6 can be realized safely and reliably.
  • All described downholders 10 are used e.g. separated by punching, eroding or laser cutting from sheets of spring steel or stainless steel (with a thickness of about 1.5 mm) and then brought by bending in the desired shape.
  • the surfaces of the blank holder 10 subjected to bending stress, in particular the inclined sections 22 and the abutment sections 23, are perpendicular to the cut edges 27 which are defined when the blank for the blank holder 10 is released from the corresponding sheet.

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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)
EP08103737A 2004-10-01 2005-09-20 Niederhalter für eine Brennstoffeinspritzvorrichtung Active EP1953381B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004048401A DE102004048401A1 (de) 2004-10-01 2004-10-01 Niederhalter für eine Brennstoffeinspritzvorrichtung und Brennstoffeinspritzvorrichtung
EP05794675A EP1797315B1 (de) 2004-10-01 2005-09-20 Niederhalter für eine brennstoffeinspritzvorrichtung

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP05794675.8 Division 2005-09-20
EP05794675A Division EP1797315B1 (de) 2004-10-01 2005-09-20 Niederhalter für eine brennstoffeinspritzvorrichtung

Publications (2)

Publication Number Publication Date
EP1953381A1 EP1953381A1 (de) 2008-08-06
EP1953381B1 true EP1953381B1 (de) 2011-12-14

Family

ID=35311338

Family Applications (3)

Application Number Title Priority Date Filing Date
EP08103737A Active EP1953381B1 (de) 2004-10-01 2005-09-20 Niederhalter für eine Brennstoffeinspritzvorrichtung
EP07123697A Active EP1906005B1 (de) 2004-10-01 2005-09-20 Brennstoffeinspritzvorrichtung
EP05794675A Active EP1797315B1 (de) 2004-10-01 2005-09-20 Niederhalter für eine brennstoffeinspritzvorrichtung

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP07123697A Active EP1906005B1 (de) 2004-10-01 2005-09-20 Brennstoffeinspritzvorrichtung
EP05794675A Active EP1797315B1 (de) 2004-10-01 2005-09-20 Niederhalter für eine brennstoffeinspritzvorrichtung

Country Status (5)

Country Link
US (1) US7802559B2 (ja)
EP (3) EP1953381B1 (ja)
JP (3) JP4532559B2 (ja)
DE (3) DE102004048401A1 (ja)
WO (1) WO2006037726A2 (ja)

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US7406946B1 (en) * 2007-04-02 2008-08-05 Hitachi, Ltd. Method and apparatus for attenuating fuel pump noise in a direct injection internal combustion chamber

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DE502005007594D1 (de) 2009-08-06
JP2010112384A (ja) 2010-05-20
JP2008514861A (ja) 2008-05-08
EP1797315B1 (de) 2008-07-23
EP1906005B1 (de) 2009-06-24
US20090056674A1 (en) 2009-03-05
EP1797315A2 (de) 2007-06-20
DE102004048401A1 (de) 2006-04-06
WO2006037726A2 (de) 2006-04-13
DE502005004836D1 (de) 2008-09-04
JP4532559B2 (ja) 2010-08-25
JP5032610B2 (ja) 2012-09-26
JP2010112385A (ja) 2010-05-20
WO2006037726A3 (de) 2006-06-22
US7802559B2 (en) 2010-09-28
EP1906005A1 (de) 2008-04-02
EP1953381A1 (de) 2008-08-06
JP5032609B2 (ja) 2012-09-26

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