EP2923067A1 - Ensemble destiné à un système d'injection de carburant, pourvu d'une soupape d'injection de carburant et d'un élément de désaccouplement - Google Patents

Ensemble destiné à un système d'injection de carburant, pourvu d'une soupape d'injection de carburant et d'un élément de désaccouplement

Info

Publication number
EP2923067A1
EP2923067A1 EP13770870.7A EP13770870A EP2923067A1 EP 2923067 A1 EP2923067 A1 EP 2923067A1 EP 13770870 A EP13770870 A EP 13770870A EP 2923067 A1 EP2923067 A1 EP 2923067A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
fuel injection
side support
injection valve
decoupling 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
EP13770870.7A
Other languages
German (de)
English (en)
Other versions
EP2923067B1 (fr
Inventor
Michael Knorpp
Martin Maier
Martin Scheffel
Michael Mayer
Pablo Antonio NAPAL JIMENEZ
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
Priority to EP17171749.9A priority Critical patent/EP3244057B1/fr
Publication of EP2923067A1 publication Critical patent/EP2923067A1/fr
Application granted granted Critical
Publication of EP2923067B1 publication Critical patent/EP2923067B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M61/10—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
    • F02M61/14—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
    • F02M2200/09—Fuel-injection apparatus having means for reducing noise
    • 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
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
    • 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

Definitions

  • the invention relates to a decoupling element for decoupling a
  • Fuel injector of a cylinder head and an arrangement with a fuel injection valve and such a decoupling element.
  • the invention relates to the field of fuel injection systems of internal combustion engines, wherein about
  • Fuel injectors under high pressure in associated fuel are Fuel injectors under high pressure in associated fuel
  • a compensation element for a fuel injection valve serves to support a fuel injection valve in a cylinder head of an internal combustion engine.
  • the compensation element is annular and arranged between a valve housing of the fuel injection valve and a wall of a receiving bore of the cylinder head.
  • the compensation element has legs, which are supported on the fuel injection valve and the cylinder head.
  • a first leg bears against a shoulder of the cylinder head.
  • a second leg abuts against a shoulder of the valve housing.
  • the compensating element undercuts and openings can be provided.
  • the compensating element may have segments that are punched out of the compensating element and bent radially inward.
  • the decoupling element realizes a low-noise construction.
  • the spring stiffness of the decoupling element is chosen so low and the decoupling element is placed such that the Entkoppelresonanz in the frequency range below 2.5 kHz.
  • the decoupling element according to the invention with the features of claim 1 and the arrangement according to the invention with the features of claim 10 have the advantage that an improved vibration damping over the life is guaranteed. Specifically, there is the advantage that sufficient noise attenuation is ensured even after a long service life and premature component failure is avoided.
  • Fuel injection valve can be reduced to the cylinder head. This can be a
  • specified target stiffness for example, be adhered to less than 50 kN / mm.
  • the associated operational stability which is required especially at high system pressures, such as in a gasoline direct injection, can be ensured.
  • the problem of the circumferential stresses can be limited by a special segmentation, which means breaking the rotational symmetry.
  • the decoupling stiffness then results from the sum of the stiffnesses of the individual segments distributed over the circumference. This corresponds to a parallel connection of bending springs.
  • the segments acting as individual bending elements are held together only by a comparatively small, circumferential, closed ring of the cylinder-side support region of the basic body.
  • the focus of the focus is achieved because they are designed comparatively large and thus can be designed for a given target stiffness with comparatively thick material thickness.
  • a further advantage is that in the shape of the segments (bending elements), the function of the required for lateral force compensation tolerance compensation element can be integrated in a simple manner.
  • the fuel injection valve on the decoupling element as a ball joint tilt and thereby acting lateral forces and tolerance offsets between a center line of a mounting hole on the cylinder head and a center line of a rail cup can be compensated.
  • Supporting region of the base body is at least partially designed in the form of a closed ring, significant advantages.
  • This embodiment is to be understood in such a way that the main body is in any case segmented outside the cylinder-side support area into the segments distributed over the circumference.
  • this also includes the possibility that the segments distributed over the circumference also partially extend into the cylinder-side support region of the main body.
  • the cylinder-side support region of the base body is only partially configured in the form of a closed ring. Only if the cylinder-side support region of the main body is designed entirely in the form of a closed ring, then the distributed over the circumference segments of the body do not extend into the cylinder-side support area.
  • the base body is subjected to pressure during the support of the fuel injection valve between the valve-side support region and the cylinder-side support region.
  • the segments distributed over the circumference can advantageously act as bending segments. In this case, comparatively large bending movements are possible with respect to a given maximum stress of the material. This allows, inter alia, an advantageous tolerance compensation with respect to the positioning of the fuel injection valve.
  • the closed ring of the cylinder-side bearing region between the circumferentially distributed segments bulges, which extend radially outward.
  • the base body has recesses which are provided between the segments of the base body and that the recesses of the base body partially extend into the cylinder-side support region of the base body, so that the cylinder-side support region of the base body only partially in the form of a closed ring is designed.
  • the distributed over the circumference segments of the body thus also extend slightly into the support area. This further facilitates bending of the segments.
  • the occurring component voltages in the circumferential direction can be concentrated in an advantageous manner to the closed ring.
  • the bulges provided between the segments distributed over the circumference which in turn are distributed around the circumference, ensure a sufficiently large material cross-section in the region of the segments in order to absorb the forces acting in the circumferential direction. At the same time, the bulges do not influence the bending behavior of the segments. However, the bulges on the cylinder head can be increased by the bulges. Thus, the bulges allow for improved design with other advantages. It is also advantageous that the bulges of the closed ring, which partially in the cylinder-side bearing area of the
  • Bridge body extending recesses.
  • the bulges also extend somewhat into the areas of the cylinder-side support region, which adjoin the recesses in the circumferential direction in each case on both sides.
  • the closed ring of the cylinder-side support region is designed as an at least essentially flat cylinder-side support region for the cylinder head. This results in an advantageous support surface and a reliable positioning on the cylinder head.
  • a securing element is configured, which cooperates in the assembled state with the housing of the fuel injection valve.
  • Secured elements may be provided, which are biased to form a captive each in the radial direction against the housing of the fuel injection valve. This is also an advantageous installation of the arrangement of the
  • the closed ring of the cylinder-side bearing region is at least indirectly connected to a snap ring, which cooperates in the assembled state with the housing of the fuel injection valve.
  • This also represents a possibility for securing the decoupling element to the fuel injection valve, for example during pre-assembly. This allows the arrangement of the
  • Fig. 1 shows an arrangement with a fuel injection valve and a decoupling element and a cylinder head in a partial, schematic and spatial
  • FIG. 2 shows the arrangement shown in FIG. 1 and the cylinder head according to a second embodiment of the invention
  • FIG. Fig. 3 shows the arrangement shown in Figure 1 and the cylinder head according to a third embodiment of the invention.
  • FIG. 4 shows the decoupling element of the arrangement shown in FIG. 1 in accordance with the first exemplary embodiment of the invention in a partial, schematic and spatial illustration for illustrating the mode of operation of a possible embodiment of the invention
  • FIG. 5 shows an arrangement with a fuel injection valve and a decoupling element and a cylinder head in an excerptional, schematic sectional view according to a fourth embodiment of the invention.
  • Fig. 6 shows the arrangement shown in Fig. 5 and the cylinder head according to a fifth embodiment of the invention
  • Fig. 7 shows the arrangement shown in Fig. 5 and the cylinder head according to a sixth embodiment of the invention.
  • FIG. 1 shows an arrangement 1 with a fuel injection valve 2 and a
  • the arrangement 1 is used for a fuel injection system of internal combustion engines.
  • the arrangement 1 is particularly suitable for fuel injection systems for the direct injection of fuel into combustion chambers of the internal combustion engine.
  • the internal combustion engine may be configured as a mixture-compression, spark-ignited internal combustion engine, whereby gasoline or other fuels suitable for such internal combustion engines as well as suitable mixtures of such fuels can be injected.
  • the decoupling element 3 is particularly suitable for such applications.
  • the fuel injection valve 2 can be configured as a high-pressure electromagnetic injection valve 2, which is used in direct injection gasoline engines. Without a decoupling element there is the problem that the
  • Fuel injector 2 makes a conspicuous and disturbing contribution to the overall noise of the engine.
  • a recordable as a valve trough noise can be caused for example by the rapid opening and closing of the fuel injection valve 2, when a valve needle is moved with high dynamics in the respective end stops. The impact of the valve needle on the end stops leads to short-term, very high
  • Fuel injection valve 2 is located, is significantly reduced. However, it turns to the decoupling element 3 in addition to the reduction of
  • the decoupling element 3 has a main body 6 with a cylinder-side
  • Supporting region 7 serves for supporting on an upper side 9 of cylinder head 4.
  • Valve-side support region 8 serves to support fuel injector 2.
  • decoupling element 3 surrounds housing 5 of fuel injector 2 in a circumferential manner.
  • the top 9 of the cylinder head 4 is configured in this embodiment as a flat top 9.
  • the main body 6 of the decoupling element 3 is used in supporting the
  • the cylinder-side bearing area 7 pressurized.
  • the base body 6 in this case distributed over the handling segments 15, 16, 17, 18, which are bent elastically during the application. Due to the segmentation of the valve-side support region 8, an optimal elasticity over the service life is ensured with respect to the predetermined material thickness. Circumferentially acting stresses are considerably reduced by the segmentation in the valve-side support region 8.
  • the cylinder-side support region 7 of the base body 6 is at least partially in the form of a closed ring 20 configured. In this case, only the cylinder-side support region 7 of the main body 6 is configured at least partially in the form of the closed ring 20. In this embodiment, the cylinder-side support region 7 of the base body 6 is configured only partially in the form of a closed ring 20.
  • the closed ring 20 of the cylinder-side support portion 7 is in this case
  • Embodiment designed as a flat cylinder-side support portion 7 with a flat contact surface 26 for the cylinder head 4.
  • a reliable positioning of the cylinder head 4 is possible.
  • This also improves the vibration damping at a possibly simultaneously required tolerance compensation for the
  • the recesses 21, 22, 23 extending in the cylinder-side support region 7 are preferably maximally pronounced, so that the remaining ring strength at the web 25 is reduced to a possible minimum.
  • Fig. 2 shows the arrangement 1 shown in Fig. 1 and the cylinder head 4 according to a second embodiment.
  • an outer edge 27 of the closed ring 20 as viewed from the top 9 of the cylinder head 4 is bent away upward.
  • this allows a stability of the closed ring 20, in particular at the web 25, to be improved, especially in tight spaces.
  • Fig. 3 shows the arrangement 1 shown in Fig. 1 and the cylinder head 4 according to a third embodiment.
  • the bulge 28 extends radially outward.
  • the bulge 28 in this embodiment the
  • the bulge 28 bridges the recess 22 which partially extends into the cylinder-side support region 7. This increases the cross-sectional area, which is significant for the absorption of the circumferential tensile forces, in particular in the region of the web 25. This reduces the corresponding tensile stresses.
  • the bulge 28 also extends into regions (zones) 29, 30 of the cylinder-side support region 7, which adjoin the recess 22 in the circumferential direction. The zones 29, 30
  • FIG. 4 shows the decoupling element 3 of the arrangement 1 shown in FIG. 1 according to the first exemplary embodiment of the invention in an excerptive, schematic and spatial illustration for illustrating the mode of operation of a possible one
  • the illustrated section may be, for example, a quarter of a possible embodiment.
  • the upwardly bent segments 16, 17 are designed in the form of curved tabs which provide the fuel injection valve 2 at the drawn for illustrative line 31 a support or support. About this line (support line) 31, the load is transmitted to the decoupling element 3 due to the low pressure and the pressure forces at the fuel injection valve. The segments 16 to 18 bend through the load. The total stiffness of the decoupling then results from the sum of the individual
  • the segments 15 to 18 in a suitable form, number and thickness can be designed by optimizing the shape so that the desired stiffness is achieved with the required strength.
  • Fig. 5 shows an arrangement 1 with a fuel injection valve and a
  • the cylinder head 4 Decoupling element 3 and a cylinder head 4 in a partial, schematic sectional view corresponding to a fourth embodiment.
  • a segment 18 of the base body 6 shown in section.
  • the valve-side support portion 8 is configured, wherein the housing 5, for example, on the line 31 of the segments 18 abuts, as is also described with reference to FIG. 4.
  • a fuse element 32 is configured on the segment 18 in this embodiment.
  • fuse element 32 configured fuse elements on other of the segments, not shown
  • the fuse element 32 acts in the illustrated assembled state with the housing 5 together.
  • the securing element 32 can be expanded during application to the housing 5 in the radial direction to the outside.
  • a clawing into the housing 5, in particular a magnet pot of the housing 5 can be achieved by a special shaping of the securing element 32.
  • a captive is formed.
  • Fig. 6 shows the arrangement 1 shown in Fig. 5 and the cylinder head 4 according to a fifth embodiment.
  • the segment 18 is configured as an inwardly open segment 18.
  • This embodiment has the additional advantage that an end stop can be realized in order to limit the maximum deformation of the segment 18. This is on the segment 18 of the valve side
  • Supporting portion 8 a spacer element 33 configured, the cylinder side
  • the spacer element 33 then cooperates with the cylinder-side support area to limit the possible range of motion.
  • a snap ring 34 is provided which cooperates with the housing 5.
  • Support region 7 is at least indirectly connected to the snap ring 34, so that the decoupling element 3 is reliably fixed to the housing 2. This facilitates, in particular, an assembly of the fuel injection valve 2 in the cylinder head 4, since the decoupling element 3 can already be preassembled on the fuel injection valve 2.
  • an outwardly open decoupling element 3 as described, for example, with reference to FIGS. 1 to 4, as well as an inwardly open decoupling element 3, as described with reference to FIG. 6 and FIG. 7, realized become.
  • Fig. 7 shows the arrangement 1 shown in Fig. 5 and the cylinder head 4 according to a sixth embodiment.
  • the housing 5 of the fuel injection valve 2 has an undercut cone 35, on which the fuel injection valve 2 is supported on the valve-side support region 8 of the decoupling element 3.
  • the housing 5 rests with its undercut cone 35 on the line 31 of the valve-side support region 8.
  • the embodiment of the decoupling element 3 is simplified.
  • an arrangement 1 can be realized, which is used for a fuel injection system of internal combustion engines.
  • the fuel injection valve 2 can be supported in the assembled state via the decoupling element 3 on the cylinder head 4 of the internal combustion engine.

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 désaccouplement (3) servant à découpler une soupape d'injection de carburant (2) d'une culasse. L'élément de désaccouplement (3) comprend un corps de base (6), lequel, une fois monté, sert à entourer un carter (5) de la soupape d'injection de carburant (2). Une zone d'appui (7) côté cylindre est formée sur le corps de base (6) et sert à être en appui sur la culasse (4). En outre, une zone de support (8) côté soupape est formée sur le corps de base (6) et sert au support de la soupape d'injection de carburant (2). Lorsque la soupape d'injection de carburant (2) est en appui entre la zone de support (8) côté soupape et la zone d'appui (7) côté culasse, le corps de base (6) est exposé à une pression. Seule la zone d'appui (7) côté culasse du corps de base (6) se présente sous la forme d'un anneau fermé, tandis que le corps de base (6) comprend des segments (15 - 18) répartis sur toute sa périphérie, lesquels sont reliés ensemble par l'anneau fermé (20) de la zone d'appui (7) côté culasse. L'élément de désaccouplement (3) permet de diminuer la transmission des bruits de la soupape d'injection de carburant (2) sur la culasse (4). L'invention concerne en outre un ensemble (1) pourvu d'un tel élément de désaccouplement (3) et d'une soupape d'injection de carburant (2).
EP13770870.7A 2012-11-20 2013-09-24 Ensemble destiné à un système d'injection de carburant, pourvu d'une soupape d'injection de carburant et d'un élément de désaccouplement Active EP2923067B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17171749.9A EP3244057B1 (fr) 2012-11-20 2013-09-24 Dispositif pour un système d'injection de carburant comprenant un injecteur de carburant et un élément de découplage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012221134.9A DE102012221134A1 (de) 2012-11-20 2012-11-20 Anordnung für eine Brennstoffeinspritzanlage mit einem Brennstoffeinspritzventil und einem Entkoppelelement
PCT/EP2013/069817 WO2014079609A1 (fr) 2012-11-20 2013-09-24 Ensemble destiné à un système d'injection de carburant, pourvu d'une soupape d'injection de carburant et d'un élément de désaccouplement

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP17171749.9A Division-Into EP3244057B1 (fr) 2012-11-20 2013-09-24 Dispositif pour un système d'injection de carburant comprenant un injecteur de carburant et un élément de découplage
EP17171749.9A Division EP3244057B1 (fr) 2012-11-20 2013-09-24 Dispositif pour un système d'injection de carburant comprenant un injecteur de carburant et un élément de découplage

Publications (2)

Publication Number Publication Date
EP2923067A1 true EP2923067A1 (fr) 2015-09-30
EP2923067B1 EP2923067B1 (fr) 2018-01-17

Family

ID=49274616

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13770870.7A Active EP2923067B1 (fr) 2012-11-20 2013-09-24 Ensemble destiné à un système d'injection de carburant, pourvu d'une soupape d'injection de carburant et d'un élément de désaccouplement
EP17171749.9A Active EP3244057B1 (fr) 2012-11-20 2013-09-24 Dispositif pour un système d'injection de carburant comprenant un injecteur de carburant et un élément de découplage

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP17171749.9A Active EP3244057B1 (fr) 2012-11-20 2013-09-24 Dispositif pour un système d'injection de carburant comprenant un injecteur de carburant et un élément de découplage

Country Status (8)

Country Link
US (1) US10072623B2 (fr)
EP (2) EP2923067B1 (fr)
JP (1) JP6039153B2 (fr)
KR (1) KR20150084863A (fr)
CN (1) CN104797808B (fr)
BR (1) BR112015011059A2 (fr)
DE (1) DE102012221134A1 (fr)
WO (1) WO2014079609A1 (fr)

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DE102014225976A1 (de) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
DE102014225988A1 (de) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Entkopplungselement für eine Brennstoffeinspritzvorrichtung
JP2018062869A (ja) * 2016-10-11 2018-04-19 株式会社Ｓｏｋｅｎ 燃料噴射装置および座金
DE102016225706A1 (de) * 2016-12-21 2018-06-21 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102017218008A1 (de) * 2017-10-10 2019-04-11 Robert Bosch Gmbh Entkopplungselement für eine Brennstoffeinspritzvorrichtung
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Also Published As

Publication number Publication date
EP2923067B1 (fr) 2018-01-17
US20160169176A1 (en) 2016-06-16
KR20150084863A (ko) 2015-07-22
CN104797808A (zh) 2015-07-22
US10072623B2 (en) 2018-09-11
EP3244057B1 (fr) 2019-12-18
JP6039153B2 (ja) 2016-12-07
EP3244057A1 (fr) 2017-11-15
WO2014079609A1 (fr) 2014-05-30
DE102012221134A1 (de) 2014-05-22
BR112015011059A2 (pt) 2017-07-11
JP2015535052A (ja) 2015-12-07
CN104797808B (zh) 2018-02-23

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