EP1421273A1 - Element de compensation con u pour une soupape d'injection de carburant - Google Patents

Element de compensation con u pour une soupape d'injection de carburant

Info

Publication number
EP1421273A1
EP1421273A1 EP02754193A EP02754193A EP1421273A1 EP 1421273 A1 EP1421273 A1 EP 1421273A1 EP 02754193 A EP02754193 A EP 02754193A EP 02754193 A EP02754193 A EP 02754193A EP 1421273 A1 EP1421273 A1 EP 1421273A1
Authority
EP
European Patent Office
Prior art keywords
webs
element according
compensating element
intermediate ring
compensation 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.)
Granted
Application number
EP02754193A
Other languages
German (de)
English (en)
Other versions
EP1421273B1 (fr
Inventor
Martin Scheffel
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 EP1421273A1 publication Critical patent/EP1421273A1/fr
Application granted granted Critical
Publication of EP1421273B1 publication Critical patent/EP1421273B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/045—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the combustion chamber
    • 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
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine

Definitions

  • the invention is based on a compensating element for a fuel injector according to the preamble of the main claim.
  • a fuel injection system which has a compensating element which consists of a support body which has a spherical support surface.
  • a fuel injector is supported via this compensating element in a receiving bore in a cylinder head. Since the fuel injector rests on the spherical dome surface with a support surface, the fuel injector can be mounted up to a certain angular deviation from the axis - the mounting hole _ and pressed firmly into the mounting hole by suitable means, for example a clamping claw. This enables a simple adaptation to the fuel feed lines. Tolerances in the manufacture and assembly of fuel injectors can be compensated.
  • the support body is complicated to manufacture and requires a spherical surface to be produced precisely.
  • the rigid support body can - not are compressed and there is thus no compensation in the axial direction of the receiving bore. Tolerances can only be compensated for on the specified geometry of the spherical surface. A radial compensation movement to the receiving bore is not possible.
  • the compensation element according to the invention for a fuel injector with the characterizing features of the main claim has the advantage that an intermediate ring is provided with webs which extend parallel to a valve housing of the fuel injector and in turn are connected to part-circular support segments which encompass the fuel injector and thereby for provide a spacing in accordance with the forces acting on the fuel injection valve from a wall of a receiving bore of a cylinder head of an internal combustion engine.
  • the compensation element ensures against both a compensation of manufacturing tolerances of the individual components as well as tolerances due to the heating of the fuel injector during * the operation and prevents tilting and deformities.
  • the intermediate ring has a quarter-circular cross-section and thus between the fuel injector and the wall of the receiving bore. is arranged that the fuel injector can be flexibly balanced in the receiving bore. Another advantage is that the intermediate ring can be produced in a simple manner from plastic. The webs can be formed in one piece with the intermediate ring or molded onto it.
  • the support segments advantageously form a circle which completely surrounds the fuel injector.
  • the number of support segments is preferably four, which are supported by two or four webs.
  • the webs can be extended and. have a retaining collar, which enables the compensation element to be fixed on the fuel injector.
  • FIG. 1A is a schematic, partially sectioned view of a first exemplary embodiment of a compensating element designed according to the invention for a fuel injector in one
  • FIG. 1B is a schematic, partially sectioned view of a second exemplary embodiment of a compensation element designed according to the invention for a fuel injection valve in a cylinder head of an internal combustion engine
  • Fig. ' IC a specific section from the ati Image 'shown in Fig. 1A of a first embodiment according to the invention designed compensation element in the region ICSin Fig. 1A, 2A shows a fuel injector centered with the embodiment of a compensating element according to the invention shown in FIG. 1A, and FIG. 5
  • FIG. 2B one with that shown in Fig. 1A
  • FIG. 1A shows a schematic partial section through a first exemplary embodiment of a compensating element 1 designed according to the invention, which is used, in particular, for aligning a fuel injection valve in a receiving bore.
  • Cylinder head of a mixture-compressing, spark-ignited internal combustion engine 20 is suitable.
  • the compensating element 1 is designed in the form of an intermediate ring 2, which has a cross section, which in the present first exemplary embodiment is a quarter circle
  • the intermediate ring 2 lies against a shoulder, not shown in FIG. 1A, of a receiving bore of a cylinder head of an internal combustion engine.
  • webs 3 are formed, which are preferably made of plastic
  • Intermediate ring 2 molded or can be made in one piece with this.
  • support segments 4 35 are provided, which 'surround fuel injection valve of the compensating element 1 - ⁇ ' in the assembled state • and • a Beabstandi ⁇ ng of the fuel injection valve from a wall 12 of the receiving bore make the cylinder head.
  • the number of Support segments 4 are four in the preferred embodiment.
  • the support segments 4 are designed in the form of quarter circles, that is to say they together form a circle encompassing the fuel injector, which is slotted at regular intervals. Two of the support segments 4 are each connected to one of the webs 3.
  • FIG. 1B shows an excerpted sectional representation of a second exemplary embodiment of a compensating element 1 designed according to the invention.
  • Components that correspond to the exemplary embodiment shown in FIG. 1A are provided with the same reference numerals.
  • the second embodiment of a compensating element 1 according to the invention also has an intermediate ring 2, on which webs 3 are formed.
  • an intermediate ring 2 on which webs 3 are formed.
  • four webs 3 are provided, each of which two webs 3 lying opposite one another are designed as holding webs 3a and slotted webs 3b.
  • the retaining webs 3a are extended compared to the webs 3 described in FIG. 1A and are provided with a retaining collar 5, which can be used, for example, by clipping onto a shoulder of the fuel injector for fastening the compensating element 1 to the latter.
  • the retaining collar 5 is there, teilkre . Is shaped and can have a width that corresponds to the width of the holding webs 3a. To better fix the compensating element 1, the holding collar 5 can also be radially widened.
  • the slotted webs 3b are designed to stabilize the support segments 4 and are designed such that they are not slotted on a side facing the Z-wiper ring 2 and are slotted on a side facing the support segments 4. Characterized each of the quarter-circular support segments 4 is at one end to one of Hal testege '3a and fixed with the other end to one of the slotted webs 3b. As a result, the support segments 4 are better supported and the shape of the compensating element 1 is maintained, which in turn enables easier assembly, since the compensating element 1 is not as sensitive to bending or warping during assembly.
  • FIGS. 2A and 2B The installation position and the function of the compensating element 1 according to the invention is shown in more detail in FIGS. 2A and 2B and explained in detail in the following description.
  • the intermediate ring 2 shown in FIGS. 1A and 1B which has a cross section that corresponds to a quarter circle, can also have an angular cross section, as in the cutout designated IC in FIG. 1A, which is shown enlarged in FIG. IC.
  • the height h of the intermediate ring 2 is variable and can be selected according to the structural conditions of the fuel injector and the receiving bore of the cylinder head.
  • FIGS. 2A and 2B show in one extract !! Sectional view of a compensating element 1 according to. Fig. 1A, which is mounted with a fuel injection valve 6 in a receiving bore 11 of a cylinder head 7 of an internal combustion engine. "
  • FIG. 2A shows an installation situation in which the compensating element 1 and the fuel injection valve. , 6 of. a wall 12 of the receiving bore 11 of the cylinder head 7 are evenly spaced or the entire component consisting of compensating element 1 and fuel injector 6 is centered in the receiving bore 11.
  • Fig. 2B the situation 'is shown for example by the connection of • the fuel injection valve 6 to an unillustrated fuel distributor line, whereby the Fuel injection valve 6 has emigrated and is no longer centered in the receiving bore 11 of the cylinder head 7.
  • the fuel injector 6 is designed in the form of a direct injection fuel injector 6 and installed in a cylinder head 7 of an internal combustion engine.
  • the fuel injector. 6 has a plug connection to an inlet end 8.
  • Fuel distributor line not shown, which can be sealed, for example, by a seal between the fuel distributor line and a feed pipe connector 9 of the fuel injection valve 6.
  • the fuel injector 6 has an electrical connection 10 for the electrical contact for actuating the
  • valve housing 14 also has a valve housing 14 and a. on the downstream side from this protruding nozzle body 13.
  • a seal 15 is arranged on the nozzle body 13 and serves to seal the cylinder head 7 against the combustion chamber of the internal combustion engine.
  • the fuel injection valve 6 has on its valve housing 14 a shoulder 16 which is inclined, for example, at an angle of 45 °. Usually, this shoulder 16 to an at least similar inclined .Schulter 17 of the receiving bore "11 of the cylinder head 7 in. A tolerance compensation between the fuel injection valve 6 and the receiving bore 11 is only very inadequately possible. ⁇ In the present embodiment, the shoulder 17 is formed at right angles in connection with the compensating element 1 according to the invention, so that the intermediate ring 2 of the . Compensation elements 1 with its flat side on the shoulder .17 and the part-circular curved side supports the fuel injector 6.
  • the compensating element 1 is placed on the shoulder 17 of the cylinder head 7 or plugged onto the valve housing 14, whereby the previous shoulder joint between the fuel injector 6 and the receiving bore 11 is opened to a distance which corresponds to the diameter of the intermediate ring 2 of the compensating element 1 becomes.
  • 2A shows the corresponding installation situation before the fuel injector 6 is connected to the fuel distributor line, not shown.
  • the position of the intermediate ring 2 enables the latter to assume an optimal position corresponding to the circumstances, which can also lead, for example, to the compensating element 1 with the fuel injector 6 being tilted relative to a longitudinal axis 18 of the fuel injector 6 or the receiving bore 11.
  • the flexibly attached support segments 4 which extend around the valve housing 14 and which extend parallel to the Ventilgehau.se 14 of the fuel injector 6, this allows the desired tolerance compensation, which prevents that. Build up radial voltages and subsequently malfunctions of the fuel injection valve 6 'occur, for example, by tilting of components inside the same.
  • the compensating element 1 according to FIG. 1A or FIG. 1B fulfills several functions.
  • a centering of the fuel injection valve can be achieved by spacing the Brennstoff.einspritzventils 6 by a wall 12 11 of the cylinder head 7 are achieved 6 of a _ excessive tilting of the fuel injection valve 6, for example in the range Counteracts nozzle body 13 of the fuel injection valve 6 and thus contributes to the sealing effect • of a sealing ring 15 which is plugged onto the nozzle body 13 and which seals the cylinder head 7 against the combustion chamber of the internal combustion engine (not shown further).
  • Temperature compensating tolerances which occur, for example, due to the heating of the fuel injection valve 6 and the cylinder head 7 during operation of the internal combustion engine, can also be compensated for by the compensating element 1. Tolerances of this type can lead, for example, to loads and tensions in the plug-in connection between the fuel injector 6 and the fuel distributor line (not shown further).
  • the fit of the compensating element 1 to the fuel injection valve 6 can either by a clearance fit
  • the clearance that allows the compensation element 1, an optimal location to take in accordance with the prevailing conditions, is particularly suitable for exemplary embodiments of compensating elements 1 shown in FIG. 1A, while the '30 push fit in compensation elements 1 shown in Fig. 1B is particularly easy to implement, since the holding collar 5 of the holding webs 3a holds the compensating element 1 on the fuel injector 6 and thus apart from the spacing of the fuel injector 6 from the
  • 35 wall 12 of the receiving bore 11 also provide effective protection against the loss of the compensating element 1 when installing and removing the fuel injector 6.
  • the fuel injector 6, as shown in Fig. 2B for example, by connecting a not shown . If the fuel distributor line is tilted in the receiving bore 11, this takes place within the framework of predetermined tolerance values which are limited by the geometry of the compensating element 1 and the receiving bore 11. The fuel injector 6 is then no longer centered in the receiving bore 11, but has migrated by a maximum value of, for example, ⁇ 0.2 mm and / or additionally tilted at an angle, the function of the fuel injector 6 and other components, such as. B.
  • sealing ring 15 but are not affected because the fuel injector 6 is still straight in itself and the valve housing 14 and the nozzle body 13 are not bent by axial forces. With sufficient flexibility of the sealing ring 15, a satisfactory sealing of the cylinder head 7 from the combustion chamber can still take place.
  • the longitudinal axis 18 of the fuel injection valve 6 is accordingly slightly tilted relative to the position assumed in FIG. 2A, but this does not impair the function of the individual components.
  • the support segments 4 can always ensure an optimal spacing of the fuel injection valve 6 from the wall 12 of the receiving bore 11, while the intermediate ring 2 of the compensating element 1 provides balanced compensation for that occurring at the inlet end 8 of the fuel injection valve 6 _ Movements' as well as tolerance caused by warming. enables.
  • the invention is not limited to the exemplary embodiments shown and is also suitable, for example, for compensating elements e 1 with differently shaped intermediate rings 2 and more or fewer support segments 4 or webs 3.
  • the invention is also suitable for any construction of fuel injection valves 6, for example for fuel injection valves 6 for injection into the Combustion chamber of a self-igniting internal combustion engine, applicable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un élément de compensation conçu pour supporter une soupape d'injection de carburant (6) dans une culasse (7) d'un moteur à combustion interne. Cet élément de compensation se présente sous la forme d'un anneau intermédiaire (2) et est disposé entre le corps de soupape (14) de la soupape d'injection de carburant (6) et une paroi (12) d'une cavité de réception (11) ménagée dans la culasse (7). L'élément de compensation (1) comporte des éléments de liaison (3) situés au niveau de la structure en anneau intermédiaire (2) et s'étendant le long du corps de soupape (14). Des segments de support (4) sont fixés auxdits éléments de liaison (3) et entourent le corps de soupape (14), ce qui distance ce dernier de la paroi (12) de la cavité de réception (11).
EP02754193A 2001-08-20 2002-06-11 Element de compensation pour une soupape d'injection de carburant Expired - Lifetime EP1421273B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10140797A DE10140797A1 (de) 2001-08-20 2001-08-20 Ausgleichselement für ein Brennstoffeinspritzventil
DE10140797 2001-08-20
PCT/DE2002/002122 WO2003018997A1 (fr) 2001-08-20 2002-06-11 Element de compensation conçu pour une soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1421273A1 true EP1421273A1 (fr) 2004-05-26
EP1421273B1 EP1421273B1 (fr) 2006-05-03

Family

ID=7696037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02754193A Expired - Lifetime EP1421273B1 (fr) 2001-08-20 2002-06-11 Element de compensation pour une soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6817341B2 (fr)
EP (1) EP1421273B1 (fr)
JP (1) JP4288163B2 (fr)
CN (1) CN100360792C (fr)
DE (2) DE10140797A1 (fr)
WO (1) WO2003018997A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3843915B2 (ja) * 2002-08-29 2006-11-08 株式会社ノーリツ 燃焼装置
DE102005006641A1 (de) * 2005-02-14 2006-08-24 Siemens Ag Einspritzventil zum Einspritzen von Kraftstoff und Zylinderkopf
EP1859160B1 (fr) * 2005-03-03 2010-02-10 Robert Bosch GmbH Dispositif d'injection de carburant
JP3940417B2 (ja) * 2005-07-22 2007-07-04 シャープ株式会社 空気調節装置
JP4546404B2 (ja) * 2006-01-25 2010-09-15 本田技研工業株式会社 エンジンの燃料噴射弁取付け構造
US7334571B1 (en) * 2006-08-31 2008-02-26 Gm Global Technology Operations, Inc. Isolation system for high pressure spark ignition direct injection fuel delivery components
US7484499B2 (en) * 2007-04-03 2009-02-03 Gm Global Technology Operations, Inc. Combustion seal
US7383818B1 (en) * 2007-04-04 2008-06-10 Gm Global Technology Operations, Inc. Fuel injector with secondary combustion seal
DE102007035714A1 (de) 2007-07-30 2009-02-05 Robert Bosch Gmbh Brennstoff-Einspritzanlage mit Ausgleichselement
EP2251541B1 (fr) * 2009-05-11 2011-11-30 Continental Automotive GmbH Injecteur de carburant et système d'injection de carburant
US8069842B2 (en) * 2009-07-02 2011-12-06 Robert Bosch Gmbh Injector mounting assembly
US20110265767A1 (en) * 2010-05-03 2011-11-03 Delphi Technologies, Inc. Isolater for fuel injector
DE102014225976A1 (de) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
DE102016225706A1 (de) * 2016-12-21 2018-06-21 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids

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US4779594A (en) * 1986-04-25 1988-10-25 Mazda Motor Corporation Intake system for an internal combustion engine
IT1215330B (it) * 1987-01-09 1990-02-08 Piaggio & C Spa Apparato per l'iniezione dicombustibile a bassa pressione in un motore a due tempi.
FR2659115B1 (fr) * 1990-03-02 1992-05-15 Procal Joint d'etancheite pour injecteur de moteur a combustion interne.
DE19735665A1 (de) 1997-06-25 1999-01-07 Bosch Gmbh Robert Brennstoffeinspritzanlage
JPH11210885A (ja) * 1998-01-20 1999-08-03 Marusan:Kk 積層構造ガスケット
DE19838755B4 (de) * 1998-08-26 2006-11-09 Daimlerchrysler Ag Auf den Brennraum einer Brennkraftmaschine einspritzende Kraftstoffeinspritzdüse
DE19849113A1 (de) * 1998-10-24 2000-05-04 Daimler Chrysler Ag Brennstoffzuführsystem für eine fremdgezündete Brennkraftmaschine
DE19857474A1 (de) * 1998-12-14 2000-06-15 Bosch Gmbh Robert Montagevorrichtung zur Montage und Demontage eines Brennstoffeinspritzventils
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DE10108467A1 (de) * 2001-02-22 2002-09-05 Bosch Gmbh Robert Befestigungsvorrichtung
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Also Published As

Publication number Publication date
US20040089270A1 (en) 2004-05-13
US6817341B2 (en) 2004-11-16
CN100360792C (zh) 2008-01-09
DE50206685D1 (de) 2006-06-08
WO2003018997A1 (fr) 2003-03-06
DE10140797A1 (de) 2003-07-31
EP1421273B1 (fr) 2006-05-03
CN1466656A (zh) 2004-01-07
JP4288163B2 (ja) 2009-07-01
JP2005500473A (ja) 2005-01-06

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