EP2896817B1 - Installation d'injection de carburant dotée d'un composant destiné à guider le carburant, d'une soupape d'injection de carburant et d'un connecteur - Google Patents

Installation d'injection de carburant dotée d'un composant destiné à guider le carburant, d'une soupape d'injection de carburant et d'un connecteur Download PDF

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Publication number
EP2896817B1
EP2896817B1 EP14194462.9A EP14194462A EP2896817B1 EP 2896817 B1 EP2896817 B1 EP 2896817B1 EP 14194462 A EP14194462 A EP 14194462A EP 2896817 B1 EP2896817 B1 EP 2896817B1
Authority
EP
European Patent Office
Prior art keywords
side part
fixing element
fuel injection
cup
cutout
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
EP14194462.9A
Other languages
German (de)
English (en)
Other versions
EP2896817A1 (fr
Inventor
Ingo Rettig
Chandrashekar Madappa
Herbert Blob
Prakasha Saligrama
Andreas Rehwald
Arunkumar Karne
Goekhan Guengoer
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 EP2896817A1 publication Critical patent/EP2896817A1/fr
Application granted granted Critical
Publication of EP2896817B1 publication Critical patent/EP2896817B1/fr
Active 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F02M2200/853—Mounting of fuel injection apparatus involving use of quick-acting mechanism, 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
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws
    • 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 relates to a connector for fuel injection systems for connecting a fuel injection valve with a fuel-carrying component and a fuel injection system with such a connector.
  • the invention relates to the field of fuel injection systems for mixture-compressing, spark-ignited internal combustion engines.
  • connection clip for a fuel injector inserted into a cup of a fuel injection rail.
  • the connection clip is U-shaped. Opposite, flat elements are designed on the connecting clip, which engage in the assembled state in a recess on the inlet nozzle of the fuel injector.
  • the connecting clip has slits which are placed on ear-shaped tabs facing away from one another on an outside of the cup. The ear-shaped tabs of the cup then engage in the slots in the connecting clip. This positions the fuel injector relative to the cup.
  • connection clip is made of spring steel.
  • the connecting clip is made of spring steel.
  • the two arms of the connecting clip can rest on the slot with its slots on the ear-shaped tabs To put on cups. Bending up is also necessary for positioning the fuel injector.
  • the given flexibility, which is advantageous for assembly, can then be too great in relation to the forces occurring during operation.
  • the holding forces can be too small in relation to permissible movements, in particular tilting or axial adjustments of the fuel injector.
  • connection clip choice of material and the geometrical design of the connection clip are restricted in such a way that, first of all, the ability to be fitted must be ensured before aspects relating to the holding function can be taken into account.
  • a connecting clamp is used to connect a diesel injector with its valve housing to a return line.
  • the connecting clip which is U-shaped in cross section, protrudes from the connection end of the return line in such a way that the diesel injector with its valve housing passes through the connecting clip at a right angle in the assembled state.
  • a clip as a fixing element for the connecting clip can be clipped onto the ends of the connecting clip solely from above or below parallel to the direction of extension of the injector.
  • the fuel injection system according to the invention with the features of claims 1 and 4 has the advantage that an improved configuration and possibly an improved mode of operation are made possible. In particular, both good assembly properties and improved properties with regard to the holding function or connection function can be achieved.
  • the connecting clip has a central side part that connects the first side part to the second side part.
  • the fixing element is preferably opposite the central side part attached when the connection bracket is installed.
  • the middle side part can optionally form a stop in order to specify the mounting position.
  • the first side part, the second side part and the middle side part of the connecting clip can advantageously be arranged in relation to one another in accordance with a U-shaped profile.
  • the connecting clip can clasp the cup and the fuel injector in an advantageous manner, allowing easy assembly.
  • the first side part and the second side part can be arranged at least approximately parallel to one another in the assembled state.
  • the first side part has a recess
  • the second side part has a recess and that the recess of the first side part and the recess of the second side part are designed such that a collar of the cup and a collar of the fuel injector are mounted in the State at least partially extend into the recess of the first side part and at least partially into the recess of the second side part.
  • insulation can be provided between the collar of the cup and the collar of the fuel injector, which serves to dampen vibrations. A structurally simple and robust design of the connector is thus possible.
  • the fuel injection system is particularly suitable for direct petrol injection.
  • the connector is also particularly suitable for fuel injection systems that are used for direct petrol injection.
  • the fuel-carrying component is preferably designed as a fuel distributor, in particular as a fuel distributor bar.
  • a fuel distributor can serve, on the one hand, to distribute the fuel to a plurality of fuel injection valves, in particular high-pressure injection valves.
  • the fuel distributor can serve as a common fuel storage for the fuel injection valves.
  • the fuel injection valves are then preferably corresponding to one another Connector connected to the fuel distributor cups. During operation, the fuel injection valves then inject the fuel required for the combustion process into the respective combustion chamber under high pressure. The fuel is compressed by a high-pressure pump and fed into the fuel distributor via a high-pressure line.
  • the fuel-carrying component and the fuel injection valve are not part of the connector according to the invention.
  • the connector according to the invention can also be manufactured and sold separately from the fuel-carrying component and a fuel injection valve.
  • valve tickers arises from the rapid opening and closing of the fuel injector, in which the valve needle is moved into the respective end stops with high dynamics.
  • the impact of the valve needle in the end stops leads to short-term, but very high contact forces, which can be transmitted to the cylinder head and the fuel-carrying component via a housing of the fuel injector if there is direct contact here. This then leads to a strong noise development at the cylinder head or at the fuel-carrying component.
  • an effective decoupling can be realized on the one hand to the cylinder head and on the other hand to the fuel-carrying component with a compact construction and thus with a smaller space requirement. Furthermore, it is possible to save a separate hold-down device, which uses spring force, for example, or to design it with a reduced spring force.
  • the fuel injection valve By mounting the fuel injection valve on the cup of the fuel-carrying component by means of the connector, the fuel injection valve can be positioned such that it is not in direct contact with the cylinder head.
  • the required seal between the fuel injector and the cylinder head can be selected regardless of the suspension.
  • a teflon seal can be provided between the fuel injection valve, in particular a nozzle body or a valve tip, and the cylinder head.
  • a force acts on the fuel injector in the direction of the cylinder head due to the pressure of the supplied fuel.
  • the connector can largely be designed independently of the assembly requirements so that the required holding force can be applied by the connector without the fuel injector being moved too far from the specified assembly position. A reliable attachment of the fuel injection valve to the cup of the fuel-carrying component is thus possible by means of the connector.
  • the fixing element which connects the first side part of the connecting clip and the second side part of the connecting clip to one another on the open side of the connecting clip in the assembled state.
  • the connection clip can be bent up a little if necessary.
  • the flexibility of the connecting clamp required for this does not have a reducing effect on the possible holding force.
  • the holding force is applied in the assembled state by the connecting clip, which is stiffened to a certain extent via the fixing element.
  • the fixing element reduces a relative movement between the side parts of the connecting clip, with in particular spreading out of the two side parts of the Connection bracket can be restricted in whole or in part.
  • a prestressing of the connecting clamp can also be specified. For this purpose, the two side parts can be acted upon one another during assembly. The preload can then be held via the fixing element.
  • the connecting clip is designed to be elastically deformable such that the first side part and the second side part can be spread apart for assembly. This facilitates the assembly of the connection clip on the cup. Furthermore, the assembly of the connecting bracket to the fuel injector can be facilitated.
  • a holding rib is configured on the first side part, that a holding rib is configured on the second side part, and that the fixing element can be added to the connecting bracket such that the fixing element on the one hand the holding rib of the first side part and on the other hand the holding rib of the second Reaches behind on the side.
  • the two side parts can, for example, be pressed against one another, that is to say towards one another.
  • the fixing element can then be clipped onto the side parts, for example. If necessary, the fixing element can also be pushed onto the side parts along the holding ribs.
  • At least one stop is configured on the connecting clip and / or on the fixing element, which in the assembled state prevents the fixing element from moving relative to the connecting clip in at least one direction along an axis of the cup.
  • an undesired displacement of the fixing element relative to the connecting clip can be ensured over the service life in the assembled state.
  • this can prevent the fixing element from being detached in whole or in part from the connecting clip due to vibrations or the like occurring during operation.
  • a through opening is formed on the first side part, that on the second A through-opening is formed on the side part, that the fixing element is designed at least in sections as a pin-shaped fixing element and that in the assembled state the fixing element extends through the through opening of the first side part on the one hand and through the through opening of the second side part on the other hand. It is also advantageous here that in the assembled state the fixing element is held on the one hand via a securing element on the first side part and the fixing element on the other hand is held on the head of the fixing element or via a further securing element on the second side part. After assembly of the connecting clip, the fixing element in this embodiment is pushed, for example, from one side through the through openings of the side parts.
  • the fixing element is then secured to the connecting clip.
  • a pretension can optionally also be provided between the side parts of the connecting clip.
  • the connecting clip is then stabilized by the fixing element. A loosening of the fixing element is reliably prevented due to its arrangement and the securing via the at least one securing element.
  • the securing element is designed as a separate securing ring.
  • the securing element can then be applied to the fixing element in a suitable manner.
  • the securing element can be designed as an expansion or clamping ring.
  • the securing element can advantageously be formed by at least one clamping lug configured on the fixing element. This enables simple mounting of the fixing element.
  • the further securing element can be designed in a corresponding manner.
  • the securing element and the further securing element can be configured in the same way or differently.
  • the through opening of the first side part is designed as a slot-shaped through opening and that the fixing element on the one hand has a leaf-shaped end section which is designed such that it is mounted through the through opening of the second side part and through the slot-shaped Through opening of the first side part is feasible and engages behind the first side part on the slot-shaped through opening in a rotated state of the fixing element. This makes it easy to assemble the fixing element by pushing it in and rotating it.
  • the fixing element can be screwed to the first side part at the through opening of the first side part and / or that the fixing element can be screwed to the second side part at the through opening of the second side part.
  • a screw connection can thus be implemented on at least one side part.
  • an open recess is formed on the first side part, that an open recess is formed on the second side part, that the fixing element is designed as a bent fixing element with a first end section, a middle section and a second end section is that the middle section of the fixing element can be inserted into the open recess of the first side part and into the open recess of the second side part in the assembled state and that the fixing element can be hooked into the first side part with its first end section and into the second side part with its second end section can be attached. It is also advantageous here that the fixing element can be suspended with its first end section in a recess in the first side part and with its second end section in a recess of the second side part.
  • the fixing element can be hung with its first end section into a recess provided on the first side part and with its second end section into a recess provided on the second side part.
  • this enables an advantageous mounting of the fixing element even in unfavorable space conditions.
  • a desired elasticity of the fixing element can be specified in this way.
  • Fig. 1 shows a fuel injection system 1 with a fuel-carrying component 2, which has a tubular base body 3 and a cup 4, a fuel injector 5 and a connector 6.
  • the connector 6 is used to connect the fuel injector 5 with the cup 4 of component 2.
  • the fuel-carrying valve Component 2 can be used as fuel distributor 2, in particular fuel rail 2, may be formed. In this case, component 2 can be used to store and distribute the fuel to a plurality of fuel injection valves 5, 5A, 5B, as is also shown in FIG Fig. 15 is described.
  • the connector 6 is particularly suitable for such fuel-carrying components 2.
  • the connector 6 has a connecting bracket 7 and a fixing element 8.
  • the fuel injector 5 is attached to the cup 4 via the connector 6.
  • direct contact between the fuel injection valve 5 and the cup 4 can be avoided, for example by inserting an insulating element between the fuel injection valve 5 and the cup 4.
  • Such an insulating element can also take on the function of a sealing element.
  • Fig. 2 shows the in Fig. 1
  • the cup 4 has a collar 9.
  • the fuel injection valve 5 has a collar 10.
  • the connecting clip 7 of the connector 6 has a first side part 11 and a second side part 12 and a middle side part 13.
  • the middle side part 13 connects the first side part 11 to the second side part 12.
  • the side parts 11, 12, 13 of the connecting bracket 7 are arranged in relation to one another in accordance with a U-shaped profile 11, 12, 13.
  • the first side part 11 and the second side part 12 are arranged parallel to one another in the assembled state.
  • the first side part 11 has a recess 14. Furthermore, the second side part 12 has a cutout 15 ( Fig. 5 ) on.
  • the recess 14 of the first side part 11 and the recess 15 of the second side part 12 are designed such that the collar 9 of the cup 4 and the collar 10 of the fuel injector 5 are at least in the assembled state extend partially into the recess 14 and at least partially into the recess 15.
  • a corresponding recess 18 ( Fig. 11 ) be configured into which the collar 9 of the cup 4 and the collar 10 of the fuel injector 5 extend at least partially.
  • the connecting clip 7 can optionally be spread out slightly, the first side part 11 and the second side part 12 being spread apart for assembly.
  • the connecting bracket 7 is designed to be elastically deformable. This makes assembly easier. Furthermore, the extent of the elastic deformability of the connecting bracket 7 can be adapted to the requirements of the assembly.
  • connection clip 7 After the connection clip 7 has been installed, the fixing element 8 is attached to the connection clip 7. This results in stiffening.
  • the elasticity of the connector 6 in the assembled state can be predetermined to be significantly less than the elasticity of the open connecting clip 7. This allows large holding forces to be applied by the connector 6 during operation.
  • an adjustment of the fuel injector 5 along a longitudinal axis (axis) 19 of the cup 4 or the fuel injector 5 can be minimized. This reliably prevents contact of the fuel injection valve 5 with a cylinder head or another component of the internal combustion engine.
  • the fuel injector 5 is then only indirectly connected to the cylinder head via a seal, in particular a teflon seal.
  • a Teflon seal can be provided in an area 20 on a valve tip 21 of the fuel injection valve 5.
  • the connecting clip 7 can, for example, in an assembly direction 22 on the collar 9 of the cup 4 and the collar 10 of the Fuel injector 5 are applied. Then the first side part 11 can be acted upon in a direction 23, while the second side part 12 can be acted upon in a direction 24.
  • the directions 23, 24 are opposite to each other.
  • the fixing element 8 can then be joined in a mounting direction 25 on holding ribs 26, 27 of the connecting bracket 7. The assembly forces acting in the directions 23, 24 on the side parts 11, 12 can then be reduced again.
  • the fixing element 8 is then connected to the connecting bracket 7.
  • the fixing element 8 engages behind the retaining rib 26 of the first side part 11 on the one hand and the retaining rib 27 of the second side part 12 on the other hand.
  • the retaining ribs 26, 27 are configured on the side parts 11, 12 for this purpose.
  • a stop lug 28 is formed on the first side part 11 and forms a stop 28. In the assembled state, the stop 28 prevents the fixing element 8 from moving relative to the connecting clamp 7 in a direction 29 along the longitudinal axis 19 of the cup 4.
  • a corresponding stop can be designed on the second side part 12. Furthermore, at least one of the side parts 11, 12 can also be configured with a further stop, which prevents the fixing element 8 from being fixed relative to the connecting bracket 7 in a direction 30 which is oriented against the direction 29 along the longitudinal axis 19.
  • the fixing element 8 can be clipped onto the connecting clip 7.
  • a locking mechanism can also be implemented, in which the side parts 11, 12 are bent in the respective direction 23, 24, if necessary, simply by acting on the fixing element 8 in the mounting direction 25.
  • Fig. 3 shows a fuel injection system 1 with a connector 6 according to an example not according to the invention in a partial, schematic, spatial representation.
  • the tubular base body 3 is not shown here to simplify the illustration.
  • the cup 4 of the Fuel-carrying component 2 has an axial bore 35, through which fuel can be fed from the tubular base body 3 into an interior of the cup 4 and from there into the fuel injection valve 5.
  • the connecting bracket 7 is applied in the mounting direction 22.
  • the side parts 11, 12 of the connecting bracket 7 are acted upon in the respective direction 23, 24.
  • the mounting direction 25 for the fixing element 8 is oriented along the longitudinal axis 19 in this case.
  • a stop element 36 is configured on the fixing element 8, which is designed as a metal strip 36, in particular a metal strip flange 36.
  • the metal strip flange 36 is profiled to primarily absorb bending loads.
  • the stop element 36 partially engages in the recess 14 of the first side part 11. As a result, movement of the fixing element 8 in the direction 29 along the longitudinal axis 19 is blocked in the assembled state. In this case, a movement in the direction 30 along the longitudinal axis 19 can also be blocked.
  • Fig. 4 shows the in Fig. 3 Fuel injection system 1 shown in an excerpt, schematic sectional view.
  • a further stop element 37 is provided on the fixing element 8, which partially engages in the cutout 15 of the second side part 12. Movement of the fixing element 8 relative to the connecting bracket 7 in the direction 29 is also blocked via the stop element 37 when the connector 6 is mounted. In this case, the movability of the fixing element 8 in the direction 30 can also be blocked.
  • the stop element 37 can be designed as a metal strip 37, in particular a metal strip flange 37.
  • the fuel injector 5 can be held on the cup 4 via the connector 6.
  • the fuel injection valve 5 does not rest directly on a cylinder head of an internal combustion engine or the like.
  • Fig. 5 shows a fuel injection system 1 with a connector 6 according to a second embodiment in a partial, schematic, spatial representation.
  • the fixing element 8 is designed as a pin-shaped fixing element 8.
  • the fixing element 8 has a rod-shaped central part 40 and ends 41, 42.
  • the end 41 has a rectangular cross section and thus a rectangular end face 43. Accordingly, the end 42 can also have a rectangular and possibly also a square cross section.
  • the fuel injector 5 is inserted into the cup 4. Then the connecting bracket 7 is mounted in the mounting direction 22. Subsequently, the connecting clip 7 is acted on its side parts 11, 12 in the directions 23, 24. When the side parts 11, 12 are pressed against one another, the fixing element 8 is mounted.
  • the fixing element 8 With its rectangular end face 43 is passed through a through opening 44 of the second side part 12, which has a rectangular cross section, and then through a through opening 45 of the first side part 11, which has a rectangular cross section , guided.
  • the connecting element 8 is thus guided in a mounting direction 46 through the through openings 44, 45.
  • the fixing element 8 is then rotated in an assembly direction of rotation 47. This rotation can take place, for example, by 90 °.
  • the fixing element 8 is now fixed in its assembled position.
  • the fixing element 8 can now press the side parts 11, 12 slightly against one another due to the previously applied pretension or be acted upon by the pretension of the connecting clip 7 at its ends 41, 42.
  • the fixing element 8 thus extends on the one hand through the through opening 45 of the first side part 11 and on the other hand through the through opening 44 of the second side part 12.
  • the end 41 can generally be designed as a leaf-shaped end section 41.
  • the end 42 can also be designed as a leaf-shaped end section 42, as a head 42 or the like.
  • the leaf-shaped end section 41 of the fixing element 8 engages behind the first side part 11 on the slot-shaped through opening 45.
  • the through opening 44 can also be designed as a slot-shaped through opening 44.
  • Fig. 6 shows a fuel injection system 1 with a connector 6 according to a third embodiment in a partial, schematic representation.
  • the fixing element 8 is designed as a pin-shaped fixing element 8 in sections.
  • the fixing element 8 has a rod-shaped central part 40.
  • the fixing element 8 has a bent end 42 which has a larger diameter than the rod-shaped central part 40.
  • securing elements 48, 49 in the form of clamping lugs 48, 49 are configured at the end 41 of the fixing element 8.
  • three such clamping lugs 48, 49 can be provided at the end 41 of the fixing element 8.
  • the fixing element 8 is guided through through openings 44, 45 of the connecting bracket 7.
  • the clamping lugs 48, 49 engage on the outside 16 of the first side part 11 in accordance with a clamping connection. Furthermore, the curved end 42 of the fixing element 8, which has an enlarged diameter or cross section, forms a stop on the outside 17 of the second side part 12. This enables simple mounting of the fixing element 8 on the connecting bracket 7.
  • Fig. 7 shows a fuel injection system 1 with the connector 6 according to an example not according to the invention in a partial, schematic, spatial representation.
  • a holding groove 50 is formed on the first side part 11 and extends parallel to the longitudinal axis 19.
  • a holding groove 51 is formed on the second side part 12 and extends parallel to the longitudinal axis 19.
  • the fixing element 8 is also designed as a holding bracket 8. The bracket 8 can be joined to the connecting bracket 7 in such a way that the bracket 8 on the one hand into the holding groove 50 of the first side part 11 and on the other hand into the holding groove 51 of the second Side part 12 engages.
  • the holding bracket 8 can initially be placed somewhat at a distance from the holding grooves 50, 51 in a mounting direction 25 on the connecting bracket 7.
  • the retaining bracket 8 can then be pressed into the retaining grooves 50, 51 in a mounting direction 52, as a result of which the retaining bracket 8 engages and is fixed.
  • the holding bracket 8 has corners 53, 54 bent by 90 ° and bent ends 41, 42.
  • the bent ends 41, 42 prevent movement of the holding bracket 8 relative to the connecting bracket 7 in a direction 29.
  • a movement of the holding bracket 8 relative to the connecting bracket 7 in the direction 30 is blocked via the bent corners 53, 54.
  • This configuration can be used, for example, in a case in which the cup 4 is attached to the tubular base body 3 in a radially offset manner. This enables the mounting bracket 8 to be mounted in the mounting direction 25.
  • the side parts 11, 12 can also be prestressed against one another, the prestressing forces being able to be applied in the directions 23, 24, as is done in a corresponding manner, inter alia on the basis of FIG Fig. 2 is described.
  • Fig. 8 shows a fuel injection system 1 with a connector 6 according to a fourth embodiment in an excerpt, schematic, spatial representation.
  • the fixing element 8 is designed as a pin-shaped fixing element 8, which has a thread extending from the end 41 over the rod-shaped central part 40.
  • the fixing element 8 has an end 42 designed as a head 42.
  • the head 42 is designed with a hexagon socket in order to enable the fixing element 8 to be screwed into the connecting bracket 7 in a direction of assembly 47.
  • the fixing element 8 can be screwed to the through opening 45 of the first side part 11 with the first side part 11 of the connecting clip 7 and / or to the through opening 44 of the second side part 12 with the second side part 12 of the connecting clip 7.
  • a nut can also be screwed onto the end 41.
  • the side parts 11, 12 can initially be acted upon in the respective direction 23, 24 in order to prestress the connecting bracket 7.
  • the fixing element 8 can then be screwed in. As a result, a preload can be maintained when screwed in.
  • the connecting clip 7 is thus reliably attached to the cup 4 and the fuel injector 5 inserted into the cup 4.
  • the mobility of the connecting bracket 7 or the connector 6 relative to the cup 4 and the fuel injection valve 5 is effectively limited.
  • Fig. 9 shows a fuel injection system 1 with a connector 6 according to a fifth embodiment in an excerpt, schematic, spatial representation.
  • end sections 55, 56 are formed on the rod-shaped central part 40, at which the diameter increases and which merge into the ends 41, 42.
  • a diameter of the end sections 55, 56 is adapted to the inside diameter of the through openings 44, 45. Since the remaining middle part 40 has a reduced diameter compared to the end sections 55, 56, the assembly is simplified.
  • securing elements 57, 58 are attached to the ends 41, 42, which fix the rod-shaped fixing element 8 to the side parts 11, 12 of the connecting clip 7.
  • the securing elements 57, 58 can be screwed on or clipped on, for example.
  • a securing element 57, 58 can also be provided on only one of the ends 41, 42, while a head is then configured on the other end 41, 42.
  • Fig. 10 shows a fuel injection system 1 with a connector 6 according to a sixth embodiment in an excerpt, schematic, spatial representation.
  • the fixing element 8 is designed as a rod-shaped fixing element 8 with a smooth rod-shaped central part 40.
  • the end 42 of the fixing element 8 is designed as a head 42.
  • Securing element 57 is provided at the end 41 of the fixing element 8 Securing element 57 is provided.
  • the securing element 57 is designed here as a clip-on securing ring 57.
  • the clip-on securing ring 57 is designed in the form of a partial ring, so that mounting in a mounting direction 59 is possible if the end 41 of the fixing element 8 is arranged in the position shown.
  • the fixing element 8 can thus first be guided in the mounting direction 46 through the through openings 44, 45 of the connecting bracket 7. Subsequently, the side parts 11, 12 can optionally be acted against one another. Then the locking ring 57 can be applied in the mounting direction 59 to the end 41 of the fixing element 8.
  • a securing element 58 can also be attached to the end 42, which corresponds to that in FIG Fig. 10 circlip 57 shown is designed and can be assembled.
  • a securing element 57, 58 configured as a securing ring 57, 58 can be attached to both ends 41, 42.
  • Fig. 11 shows a connector 6 according to a seventh embodiment in a schematic, spatial representation before assembly.
  • the connector 6 has the connecting clip 7 and the fixing element 8.
  • the first side part 11 of the connecting clip 7 has the recess 14, which the recess 15 of the second side part 12 is opposite.
  • the recess 18 is provided on the central side part 13.
  • contact surfaces 65, 66, 67 are designed to support the fuel injection valve 5 on the connecting bracket 7 of the connector 6 is thus possible.
  • the fixing element 8 is in the form of a curved fixing element 8 with a first end section 55, a central section 40, which is designed as a rod-shaped central part 40, and a second End portion 56 formed. Furthermore, the first side part 11 has an open recess 68. In addition, the second side part 12 has an open recess 69. A recess 70 is formed on the first side part 11. Furthermore, a recess 71 is formed on the second side part 12.
  • the end section 55 is hooked with its end face 72 into the recess 70 of the first side part 11. Furthermore, the end face 73 of the second end section 56 is hooked into the recess 71 of the second side part 12.
  • the middle section 40 of the fixing element 8 is inserted into the open recess 68 of the first side part 11 and into the open recess 69 of the second side part 12 in the assembled state.
  • the side parts 11, 12 are preferably urged against one another, while the fixing element 8 is attached to the connecting bracket 7.
  • Fig. 12 shows a connector 6 according to an eighth embodiment in a schematic, spatial representation before assembly.
  • the connecting bracket 7 is first attached to the cup 4 and the fuel injector 5 attached to the cup 4.
  • the side parts 11, 12 are then acted against one another in the directions 23, 24.
  • the fixing element 8 is applied to the connecting bracket 7 in the mounting direction 25.
  • the fixing element 8 with its curved end sections 55, 56 is suspended in the cutouts 14, 15 of the side parts 11, 12.
  • the middle section 40 is inserted into the open recesses 68, 69.
  • the applied bias of the connecting bracket 7 can then at least partially continue in the assembled state.
  • Fig. 13 a connector according to a ninth embodiment in a schematic, spatial representation before assembly.
  • bulges 74, 75 are configured at the end sections 55, 56.
  • the bulges 74, 75 are designed in this exemplary embodiment by corresponding bends on the end sections 55, 56.
  • Fig. 14 shows a connector 6 according to a tenth embodiment in a schematic, spatial representation before assembly.
  • the fixing element 8 is hung on its end faces 72, 73 of the end sections 55, 56 in depressions 70, 71 of the side parts 11, 12.
  • the fixing element 8 can be guided at least essentially in the mounting direction 25 to the connecting clip 7.
  • the fixing element which is suspended with its end sections 55, 56 in the recesses 70, 71 of the side parts 11, 12, is rotated in a direction of assembly rotation 76 until the middle section 40 is inserted into the open cutouts 68, 69.
  • the fixing element 8 can be lifted somewhat out of the recesses 70, 71 at its end sections 55, 56. As a result, the middle section 40 reaches the open cutouts 68, 69 of the side parts 11, 12 via edges 77, 78.
  • the fixing element 8 can also be designed as an at least approximately U-shaped fixing element 8 in the respective application.
  • Fig. 15 shows a fuel injection system 1 in a schematic representation according to a possible embodiment of the invention.
  • the fuel-carrying component 2 has the tubular base body 2 and cups 4, 4A, 4B.
  • the tubular base body 3 is used for storing and distributing fuel to fuel injection valves 5, 5A, 5B, which are mounted on the cups 4, 4A, 4B.
  • the component 2 can thus be configured as a fuel distributor 2, in particular a fuel distributor bar 2, which serves to store fuel and to distribute the stored fuel to a plurality of fuel injection valves 5, 5A, 5B of the fuel injection system 1.
  • the number of fuel injection valves 5, 5A, 5B is selected in relation to the respective application. If necessary, several, in particular two, tubular base bodies 3 can also be provided, in order to enable the fuel to be divided into rows of cylinders of an internal combustion engine lying opposite one another.
  • the fuel injection system 1 has a tank 80 and a high-pressure pump 81. If necessary, a pre-feed pump can also be provided. Furthermore, a pressure relief valve 82 is provided in order to limit the pressure of the fuel delivered into the base body 3.
  • the fuel injection valves 5, 5A, 5B are connected to the cups 4, 4A, 4B of component 2 via connectors 6, 6A, 6B.
  • the connectors 6, 6A, 6B are preferably of the same design. Possible configurations of the connectors 6, 6A, 6B are based on the 1 to 14 described in detail.
  • a connector 6, 6A, 6B can thus advantageously be used to connect a fuel injector 5, 5A, 5B to the respective cup 4, 4A, 4B.
  • the connecting clip 7 of the connector 6 partially surrounds the cup 4 and the fuel injection valve 5.
  • An open side 83 is provided on the connecting bracket 7 for attaching the connecting bracket 7.
  • the connecting clip 7 can be mounted with the open side 83 ahead of the cup 4 and the fuel injector 5 inserted into the cup 4 in the region of the collars 9, 10 of the cup 4 and the fuel injector 5.
  • the fixing element 8 is mounted on the connecting bracket 7. In the assembled state, the fixing element 8 connects the first side part 11 of the connecting clip 7 to the second side part 12 of the connecting clip 7 on the open side 83. This ensures a high stability of the connecting clip 7. Any relatively high flexibility of the connecting bracket 7 that may be required for assembly then does not have an adverse effect on the possible holding force, since a stiffening is achieved to a certain extent via the fixing element 8.

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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)

Claims (11)

  1. Système d'injection de carburant (1), en particulier pour moteurs à combustion interne à compression du mélange et à allumage commandé, comprenant au moins une soupape d'injection de carburant (5, 5A, 5B) et au moins une coupelle (4, 4A, 4B) d'un composant (2) guidant le carburant et au moins un connecteur (6, 6A, 6B) servant à relier la soupape d'injection de carburant (5, 5A, 5B) à la coupelle (4, 4A, 4B) du composant (2), une pince de liaison (7) étant prévue, laquelle sert à enserrer au moins partiellement la coupelle (4, 4A, 4B) et la soupape d'injection de carburant (5, 5A, 5B) dans un état monté, afin de relier la soupape d'injection de carburant (5, 5A, 5B) à la coupelle (4, 4A, 4B), la pince de liaison (7) comprenant une première partie latérale (11) et une deuxième partie latérale (12), et une partie latérale centrale (13) étant prévue, laquelle relie la première partie latérale (11) à la deuxième partie latérale (12) de telle sorte qu'un profilé (11, 12, 13) en forme de U, entourant la coupelle (4, 4A, 4B), de la pince de liaison (7) soit présent, et la première partie latérale (11) comprenant un évidement (14) et la deuxième partie latérale (12) comprenant un évidement (15), et l'évidement (14) de la première partie latérale (11) et l'évidement (15) de la deuxième partie latérale (12) étant réalisés de telle sorte qu'un collet (9) de la coupelle (4) s'étende, dans l'état monté, au moins partiellement dans l'évidement (14) de la première partie latérale (11) et au moins partiellement dans l'évidement (15) de la deuxième partie latérale (12),
    caractérisé en ce
    qu'au moins un élément de fixation (8) indépendant de la coupelle (4, 4A, 4B) est prévu, et en ce que la pince de liaison (7) et l'élément de fixation (8) sont réalisés de telle sorte que l'élément de fixation (8) relie l'une à l'autre la première partie latérale (11) de la pince de liaison (7) et la deuxième partie latérale (12) de la pince de liaison (7) au niveau d'un côté ouvert (83) de la pince de liaison (7) dans l'état monté, l'élément de fixation (8) s'étendant à partir de la première partie latérale (11) de la pince de liaison (7) jusqu'à la deuxième partie latérale (12) et l'élément de fixation (8) étant monté en regard de la partie latérale centrale (13), et en plus du collet (9) de la coupelle (4), un collet (10) de la soupape d'injection de carburant (5) s'étendant aussi, dans l'état monté, au moins partiellement dans l'évidement (14) de la première partie latérale (11) et au moins partiellement dans l'évidement (15) de la deuxième partie latérale (12), et le sens de montage (25) de l'élément de fixation (8) sur la pince de liaison (7) étant opposé au sens de montage (22) de la pince de liaison (7) sur la coupelle (4) et la soupape d'injection de carburant (5).
  2. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    la pince de liaison (7) est réalisée de manière déformable élastiquement de telle sorte que la première partie latérale (11) et la deuxième partie latérale (12) puissent être écartées l'une de l'autre pour le montage.
  3. Système d'injection de carburant selon la revendication 1 ou 2,
    caractérisé en ce
    qu'une nervure de retenue (26) est réalisée sur la première partie latérale (11), en ce qu'une nervure de retenue (27) est réalisée sur la deuxième partie latérale (12) et en ce que l'élément de fixation (8) peut être assemblé sur la pince de liaison (7) de telle sorte que l'élément de liaison (8) vienne en prise par l'arrière d'une part avec la nervure de retenue (26) de la première partie latérale (11) et d'autre part avec la nervure de retenue (27) de la deuxième partie latérale (12),
    ou
    en ce qu'une rainure de retenue (50) est réalisée sur la première partie latérale (11), en ce qu'une rainure de retenue (51) est réalisée sur la deuxième partie latérale (12), en ce que l'élément de fixation (8) est réalisé en tant qu'étrier de retenue (8) et en ce que l'étrier de retenue (8) peut être assemblé sur la pince de liaison (7) de telle sorte que l'étrier de retenue (8) vienne en prise d'une part dans la rainure de retenue (50) de la première partie latérale (11) et d'autre part dans la rainure de retenue (51) de la deuxième partie latérale (12).
  4. Système d'injection de carburant (1), en particulier pour moteurs à combustion interne à compression du mélange et à allumage commandé, comprenant au moins une soupape d'injection de carburant (5, 5A, 5B) et au moins une coupelle (4, 4A, 4B) d'un composant (2) guidant le carburant et au moins un connecteur (6, 6A, 6B) servant à relier la soupape d'injection de carburant (5, 5A, 5B) à la coupelle (4, 4A, 4B) du composant (2), une pince de liaison (7) étant prévue, laquelle sert à enserrer au moins partiellement la coupelle (4, 4A, 4B) et la soupape d'injection de carburant (5, 5A, 5B) dans un état monté, afin de relier la soupape d'injection de carburant (5, 5A, 5B) à la coupelle (4, 4A, 4B), la pince de liaison (7) comprenant une première partie latérale (11) et une deuxième partie latérale (12), et une partie latérale centrale (13) étant prévue, laquelle relie la première partie latérale (11) à la deuxième partie latérale (12) de telle sorte qu'un profilé (11, 12, 13) en forme de U, entourant la coupelle (4, 4A, 4B), de la pince de liaison (7) soit présent, et la première partie latérale (11) comprenant un évidement (14) et la deuxième partie latérale (12) comprenant un évidement (15), et l'évidement (14) de la première partie latérale (11) et l'évidement (15) de la deuxième partie latérale (12) étant réalisés de telle sorte qu'un collet (9) de la coupelle (4) s'étende, dans l'état monté, au moins partiellement dans l'évidement (14) de la première partie latérale (11) et au moins partiellement dans l'évidement (15) de la deuxième partie latérale (12),
    caractérisé en ce
    qu'au moins un élément de fixation (8) indépendant de la coupelle (4, 4A, 4B) est prévu, et en ce que la pince de liaison (7) et l'élément de fixation (8) sont réalisés de telle sorte que l'élément de fixation (8) relie l'une à l'autre la première partie latérale (11) de la pince de liaison (7) et la deuxième partie latérale (12) de la pince de liaison (7) au niveau d'un côté ouvert (83) de la pince de liaison (7) dans l'état monté, l'élément de fixation (8) s'étendant à partir de la première partie latérale (11) de la pince de liaison (7) jusqu'à la deuxième partie latérale (12) et l'élément de fixation (8) étant monté en regard de la partie latérale centrale (13), et en plus du collet (9) de la coupelle (4), un collet (10) de la soupape d'injection de carburant (5) s'étendant aussi, dans l'état monté, au moins partiellement dans l'évidement (14) de la première partie latérale (11) et au moins partiellement dans l'évidement (15) de la deuxième partie latérale (12), une ouverture traversante (45) étant formée sur la première partie latérale (11), en ce qu'une ouverture traversante (44) est formée sur la deuxième partie latérale (12), en ce que l'élément de fixation (8) est réalisé au moins dans certaines régions en tant qu'élément de fixation (8) en forme de tige et en ce que l'élément de fixation (8) s'étend, dans l'état monté, d'une part à travers l'ouverture traversante (45) de la première partie latérale (11) et d'autre part à travers l'ouverture traversante (44) de la deuxième partie latérale (12), le sens de montage (46) de l'élément de fixation (8) passant à travers les ouvertures traversantes (44, 45).
  5. Système d'injection de carburant selon la revendication 4,
    caractérisé en ce que
    dans l'état monté, l'élément de fixation (8) est maintenu d'une part sur la première partie latérale (11) par le biais d'un élément de sûreté (57) et/ou l'élément de fixation (8) est maintenu d'autre part sur la deuxième partie latérale (12) par le biais d'une tête (42) de l'élément de fixation (8) ou par le biais d'un autre élément de sûreté (58).
  6. Système d'injection de carburant selon la revendication 5,
    caractérisé en ce que
    l'élément de sûreté (57) est réalisé sous forme d'anneau de sûreté séparé (57) ou en ce que l'élément de sûreté (57) est formé par au moins un ergot de serrage (48, 49) réalisé sur l'élément de fixation (8) et/ou en ce que l'autre élément de sûreté (58) est réalisé sous forme d'anneau de sûreté séparé (58) ou en ce que l'autre élément de sûreté (58) est formé par au moins un ergot de serrage réalisé sur l'élément de fixation (8).
  7. Système d'injection de carburant selon la revendication 4,
    caractérisé en ce que
    l'ouverture traversante (45) de la première partie latérale (11) est réalisée en tant qu'ouverture traversante (45) en forme de fente, en ce que l'élément de fixation (8) comprend d'un côté une partie d'extrémité (41) en forme de lame, laquelle partie d'extrémité est réalisée de telle sorte qu'elle peut être guidée, pour le montage, à travers l'ouverture traversante (44) de la deuxième partie latérale (12) et à travers l'ouverture traversante (45) en forme de fente de la première partie latérale (11) et vient en prise par l'arrière avec la première partie latérale (11) au niveau de l'ouverture traversante (45) en forme de fente dans un état tourné de l'élément de fixation (8).
  8. Système d'injection de carburant selon l'une des revendications 4 à 7,
    caractérisé en ce que
    l'élément de fixation (8) peut être vissé sur la première partie latérale (11) au niveau de l'ouverture traversante (45) de la première partie latérale (11) et/ou en ce que l'élément de fixation (8) peut être vissé sur la deuxième partie latérale (12) au niveau de l'ouverture traversante (44) de la deuxième partie latérale (12).
  9. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce
    qu'un évidement ouvert (68) est réalisé sur la première partie latérale (11), en ce qu'un évidement ouvert (69) est réalisé sur la deuxième partie latérale (12), en ce que l'élément de fixation (8) est réalisé sous forme d'élément de fixation courbé (8) présentant une première partie d'extrémité (55), une partie centrale (40) et une deuxième partie d'extrémité (56), en ce que la partie centrale (40) de l'élément de fixation (8) peut être, dans l'état monté, insérée dans l'évidement ouvert (68) de la première partie latérale (11) et dans l'évidement ouvert (69) de la deuxième partie latérale (12), et en ce que l'élément de fixation (8) peut être accroché, par sa première partie d'extrémité (55), dans la première partie latérale (11) et, par sa deuxième partie d'extrémité (56), dans la deuxième partie latérale (12) .
  10. Système d'injection de carburant selon la revendication 9,
    caractérisé en ce que
    l'élément de fixation (8) peut être accroché, par sa première partie d'extrémité (55), dans un évidement (14) de la première partie latérale (11) et peut être accroché, par sa deuxième partie d'extrémité (56), dans un évidement (15) de la deuxième partie latérale (12).
  11. Système d'injection de carburant selon la revendication 9,
    caractérisé en ce que
    l'élément de fixation (8) peut être accroché, par sa première partie d'extrémité (55), dans un renfoncement (70) qui est prévu sur la première partie latérale (11) et peut être accroché, par sa deuxième partie d'extrémité (56), dans un renfoncement (71) qui est prévu sur la deuxième partie latérale (12).
EP14194462.9A 2014-01-15 2014-11-24 Installation d'injection de carburant dotée d'un composant destiné à guider le carburant, d'une soupape d'injection de carburant et d'un connecteur Active EP2896817B1 (fr)

Applications Claiming Priority (1)

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DE102014200603.1A DE102014200603A1 (de) 2014-01-15 2014-01-15 Brennstoffeinspritzanlage mit einer Brennstoff führenden Komponente, einem Brennstoffeinspritzventil und einem Verbinder

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EP2896817B1 true EP2896817B1 (fr) 2020-01-08

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EP3301295B1 (fr) * 2016-09-29 2020-11-18 Vitesco Technologies GmbH Ensemble d'injection de carburant pour moteur à combustion interne

Citations (1)

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GB2467321A (en) * 2009-01-28 2010-08-04 Fluid Transfer Systems Ltd Snap-fit connector and non-return valve for a fuel injector leak-off line

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DE19724165A1 (de) * 1997-06-07 1998-12-10 Bosch Gmbh Robert Befestigungsanordnung zum Halten eines Aggregats an einem Körper einer Kraftstoffversorgungsanlage
US6053149A (en) 1998-05-28 2000-04-25 Siemens Automotive Corporation Fuel injector clip retention arrangement
JP4558021B2 (ja) * 2007-09-06 2010-10-06 日立オートモティブシステムズ株式会社 燃料噴射弁およびその支持方法
EP2058509B1 (fr) * 2007-11-12 2012-07-18 Continental Automotive GmbH Raccord
US20100012093A1 (en) * 2008-07-18 2010-01-21 Pepperine Dean M High-pressure fuel injector to fuel rail connection
US7856962B2 (en) * 2009-06-02 2010-12-28 Hitachi Automotive Products (Usa), Inc. Fuel system for a direct injection internal combustion engine
KR101199642B1 (ko) * 2011-02-25 2012-11-08 주식회사 케피코 차량용 연료레일의 연료분사기 고정구조

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GB2467321A (en) * 2009-01-28 2010-08-04 Fluid Transfer Systems Ltd Snap-fit connector and non-return valve for a fuel injector leak-off line

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