EP1846654B1 - Alignement de pontages electriques dans des injecteurs - Google Patents

Alignement de pontages electriques dans des injecteurs Download PDF

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Publication number
EP1846654B1
EP1846654B1 EP05817307A EP05817307A EP1846654B1 EP 1846654 B1 EP1846654 B1 EP 1846654B1 EP 05817307 A EP05817307 A EP 05817307A EP 05817307 A EP05817307 A EP 05817307A EP 1846654 B1 EP1846654 B1 EP 1846654B1
Authority
EP
European Patent Office
Prior art keywords
injector
module
conductor
solid
electrical
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.)
Not-in-force
Application number
EP05817307A
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German (de)
English (en)
Other versions
EP1846654A1 (fr
Inventor
Juergen Frasch
Christoph Butscher
Michael Fleig
Stephan Wehr
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP1846654A1 publication Critical patent/EP1846654A1/fr
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Publication of EP1846654B1 publication Critical patent/EP1846654B1/fr
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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators

Definitions

  • fuel injectors which contain one or more electrically controllable valves.
  • an electrically controllable solenoid or piezoelectric valve can be provided for controlling a needle valve and thus for controlling the course of the injection.
  • Other valves can be used for example for a pressure boosting.
  • the electrical contacting of these valves often presents a challenge.
  • a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine and an alignment sleeve for use in a fuel injector according to the invention and a method for producing a fuel injector according to the invention are proposed, wherein the described disadvantages of the prior art are avoided or reduced.
  • the fuel injector has an injector body with an injector axis, at least one electrically controllable valve let into the injector body and at least one electrical injector body contact accessible from an outside of the injector body. At least one of the electrically controllable valves should have at least one electrical valve body contact.
  • a basic idea of the present invention is to use a solid conductor for the electrical connection between the at least one valve contact and the at least one injector body contact, which does not deform under the action of its own weight force in contrast to a simple cable or wire and, for example, over a solder joint Sliding plastic contacts of the solid conductor under the influence of its own weight and under additional force can be accepted if the shape of the solid conductor remains essentially unchanged.
  • the at least one solid conductor thus represents a kind of artificial extension of the electrical valve contacts.
  • the solid conductor usually has to be guided through one or more conductor channels during assembly of the fuel injector, which may have different angles of inclination to the injector axis in different regions or modules of the fuel injector.
  • a solid conductor is led out of a module at a first angle and then has to be adapted to this angle of inclination when it is guided into a conductor channel of a second module which has a different angle of inclination than the injector axis from the first angle of inclination.
  • the assembly of the individual modules of the fuel injector is made more difficult.
  • the angle adjustment can lead to problems especially when inserting the solid conductor in a plug-in contact, which has only a certain angular tolerance.
  • the basic idea according to the invention for solving this problem the angle adjustment is to use at least one alignment sleeve.
  • the at least one solid conductor in at least one module completely or partially a predetermined inclination, for example, the inclination 0 ° imposed on the injector axis.
  • a solid conductor when being led out of a conductor channel of a module, the angle of inclination of the conductor channel in an adjacent or another module are imposed, in which the solid conductor is subsequently introduced.
  • FIG. 1 an overall view of an injector body 110 for a common rail injection system is shown.
  • the injector body 110 can be dismantled at parting lines 124, 126, 128 and 130 into substantially five functional modules 132, 134, 136, 138, 140: a control module 132, a sealing plate 134, a line connection module 136, a pressure booster module 138 and a nozzle module 140
  • Compressor module 138 essentially serves to translate a fuel pressure which is provided by an external pressure source, for example via a high-pressure common space, to the fuel injector (for example 1000 bar) into a second pressure (for example 2200 bar) two working pressures are available for the injection process.
  • the injector body 110 has two solenoid valves 111, 112: a first solenoid valve 111 arranged in the control module 132 for controlling the pressure transmission in the pressure booster module 138, and a second solenoid valve 112 arranged in the nozzle module 140 for controlling the actual injection process via a valve needle (not shown) ,
  • the solenoid valve 112 in the nozzle module 140 is electrically actuated via two electrical valve contacts 114.
  • the injector body 110 has at its upper end an electrical injector body contact 116 accessible from above.
  • the realization of a disassembly of the injector body 110 or a simple modular assembly consists in the illustrated modular design of the injector body 110 in such a way to electrically connect the valve contacts 114 to the injector body contact 116, further ensuring easy assembly and disassembly of the injector body.
  • two conductor channels 120 are provided in this embodiment, which extend through the modules 138, 136 and 134.
  • the conductor channels 120 are formed by bores in the pressure booster module 138, in the line connection module 136 and in the sealing plate 134. When the injector body 110 is assembled, these bores are in each case flush at the parting lines 128 and 126, so that a single, continuous conductor channel 120 results.
  • the individual holes of the conductor channel 120 have in this embodiment in the individual modules 138, 136, 134 each have a straight course. A curved course of the holes can be realized with the inventive solution.
  • the bores in the individual modules 138, 136, 134 each have a different inclination to an injector axis 142.
  • the conductor channel 120 in the pressure booster module 138 has an inclination of 1 ° to the injector axis 142
  • the inclination in this embodiment in the line connection module 136 is 2.2 °.
  • the connection between the two electrical valve contacts 114 of the solenoid valve 112 and the injector body contact 116 is in this embodiment partially via two solid conductors 118.
  • the solid conductors 118 extend through the two conductor channels 120 and connect the valve contacts 114 with electrical plug contacts 122, which in turn via an electrical connection 144 (for example, two each at one end with an electrical plug contact 122 and at another end with the injector body contact 116 soldered cables) are connected to the injector body contact 116.
  • the solid conductors 118 are fixed or detachably connected electrically to the valve contacts 114, for example via a welded connection or a plug connection.
  • connection of the solid conductors 118 with the plug contacts 122 is reversible, so that this connection can be made during assembly of the injector body 110 by simply pressing in the solid conductors 118 into the plug contacts 122.
  • the solid conductors 118 can be easily removed again from the plug contacts 122 and thus the injector body 110 can be disassembled again without unsoldering of electrical connections.
  • the solid conductors 118 are stiff enough that they on the one hand do not change their shape substantially under their own weight and thus thread easily through the conductor channels 120 with their different inclinations to Injektorachse 142 and plug into the plug contacts 122.
  • the solid conductors should have a certain plasticity, so that no mechanical stresses occur at the transition between sections of the conductor channels 120 with different angles of inclination.
  • the term "solid conductor” does not necessarily restrict the selection of materials to solid materials, but it is also possible, for example, to use waveguides (tubes) as solid conductors 118, provided they have sufficient mechanical rigidity.
  • the inclination of the conductor channel 120 causes problems.
  • a mating of the individual modules 132, 134, 136, 138, 140 is typically carried out by means of a movement and a force parallel to the Injektorachse 142.
  • the inclination of 2.2 ° of the solid conductors 118 in the line connection module 136 prepares for example when inserting the solid conductors 118 in the Plug contacts 122, which are arranged in below 0 ° to the injector 142 extending portions of the conductor channels 120 in the control module 132 difficulties.
  • the solid conductors 118 would have to run parallel to the injector axis 142.
  • This problem is inventively solved in this embodiment in that the two solid conductors 118 by a (below described in detail) alignment sleeve 146 a parallel course is forced to the injector 142.
  • a single alignment sleeve 146 can also be used, which aligns both solid conductors 118 at the same time.
  • the alignment sleeves 146 are partially inserted into the conductor channels 120 in the lead terminal module 136, which causes the ends of the solid conductors 118 to be pushed through the alignment sleeves 146. In this case, the ends of the solid conductors 118, which would emerge without orientation sleeves 146 at an angle of inclination of 2.2 ° to the injector axis 142 from the conductor channels 120, a parallel course is forced to the injector 142.
  • the alignment sleeves 146 protrude after assembly of the modules 134 and 136 partially in the (parallel to the injector 142 extending) conductor channels 120 in the sealing plate 134 inside.
  • the solid conductors 118 have a diameter of one millimeter and as a material CuSn6 with a Brinell hardness between 80 and 90 HB, which is otherwise used for example as welding filler.
  • a material CuSn6 with a Brinell hardness between 80 and 90 HB, which is otherwise used for example as welding filler.
  • CuAl8, CuAl8Ni2, CuAl8Ni6, CuAl9Fe, CuMn13A17, CuSi3, CuSn, copper or nickel silver are also possible, for example, to use CuAl8, CuAl8Ni2, CuAl8Ni6, CuAl9Fe, CuMn13A17, CuSi3, CuSn, copper or nickel silver.
  • These materials meet the above requirements for hardness and plasticity and are also easily connected by welding with the valve contacts 114.
  • the hardness of the materials should be between 50 and 100 HB, preferably between 60 and 95 HB and particularly advantageously between 75 and 90 HB.
  • the solenoid valve 112 is shown and two solid conductors 118, each 127 mm in length, which are connected to the valve contacts 114.
  • the connection between the solid conductors 118 and the valve contacts 114 is encapsulated in this case with an electrically insulating thermoplastic 210 and therefore not visible in this perspective view.
  • an electrically insulating thermoplastic 210 As a thermoplastic material, among other alternatives, for example, PPS or PA can be used, in particular glass fiber-filled PPS or PA (eg PPS GF 30 or PA 66 GF 30), glass fiber filling additionally increasing the mechanical stability of the compound.
  • the electrically insulating thermoplastic 210 increases the dimensional stability of the connections between the valve contacts 114 and the solid conductors 118.
  • the solid conductors 118 in this embodiment are largely wrapped with shrink tubing 212.
  • the shrink tubing 212 electrically insulates the solid conductors 118 against the walls of the conductor channels 120 of the injector body 110.
  • the shrink tubing 212 is not completely shrunk onto the solid conductors 118 to save costs, but only in some sections.
  • the shrink tubing 212 extends upwardly from the electrically insulating thermoplastic 210.
  • the electrical insulation in particular the heat-shrinkable tube 212, ends in each case below the upper ends 214 of the solid conductors 118, so that the upper ends 214 of the solid conductors 218 are not enveloped in an electrically insulating manner and can be plugged into the plug contacts 122 in an electrically connecting manner.
  • an electrically conductive connection between the valve contacts 114 and the injector body contact 116 can be produced without a complex soldering or welding process.
  • the injector body 110 can again be easily dismantled for maintenance purposes, wherein the plug connection 122 is simply separated again from the solid conductors 118 by the action of force. Unsoldering of the compound is not required since the compound is reversible.
  • FIG. 3 is a sectional view of a section of the line connection module 136 is shown, based on which the above-described problem of adjusting the angle of inclination is to be illustrated.
  • the line connection module 136 has a substantially cylindrical conductor channel 120 with a diameter D of 2 mm. This conductor channel 120 is inclined at an angle ⁇ of 2.2 ° with respect to the injector axis 142.
  • the line connection module 136 has a height h of 40.8 mm and has an annular shoulder 312 on its upper end 310 facing the sealing plate 134.
  • a solid conductor 118 extends through the conductor channel 120.
  • the solid conductor 118 is electrically insulated from the line connection module 136 by means of a shrink tube 212 (not shown).
  • the upper end 214 of the solid conductor 118 which is further rounded for easier insertion into the plug contacts 122, in this geometry has a wobble circle with a diameter of 3.0 mm. This wobble circle is too large in diameter than that of the plug contacts 122 (see FIG. 1 ) could be reliably recorded.
  • FIGS. 4 and 5 a possible measure is shown, by means of which the problem of the angular adjustment of the solid conductors 118 can be overcome when assembling the individual modules 136, 134 and 132. It is in FIG. 4 the line connection module 136 with protruding from the conductor channels 120 solid conductors 118 shown in plan view, in FIG. 5 in side view. Before plugging sealing plate 134 (in FIGS. 4 and 5 not shown) and lead terminal module 136, the ends 214 of the solid conductors 118 are plastically deformed by means of a prism 410 and a mechanical stop 412.
  • the solid conductors 118 are fixed in their position near their exit from the conductor channels 120 by means of the stop 412, whereby a force is exerted against the solid conductors 118 in the direction of the arrow 414. Subsequently, the upper ends 214 of the solid conductors 118 become two grooves 416 of the prism 410 inserted and exerted in the direction of deformation 418 by means of the prism 410 a force on the ends 214 of the solid conductors 118.
  • the method shown has the disadvantage that the solid conductors 118 must be plastically deformable.
  • a positioning of the prism 410 and the stop 412 is expensive in terms of apparatus and can often be done only by hand. The illustrated method thus often proves to be insufficient in practice.
  • FIGS. 6 to 9 Therefore, a preferred arrangement or a preferred method is shown in which the adaptation of the inclination angle of the solid conductors 118 by means of two alignment sleeves 146 takes place.
  • FIG. 6 a sectional view of the entire course of the conductor channel 120 of the valve contacts 114 to the plug contacts 122.
  • FIG. 7 is a sectional view of an alignment sleeve 146 is shown.
  • FIGS. 8 and 9 the assembly of the line connection module 136, the sealing plate 134 and the control module 132 by means of the alignment sleeve 146 is shown.
  • the conductor channels 120 in the region of the pressure booster module 138 have an inclination angle of 1.0 ° to the injector axis 142, an inclination angle of 2.2 ° in the region of the line connection module 136 and a parallel course to the injector axis 142 in the region of the sealing plate 134 and the control module 132
  • the alignment of the solid conductors 118 between the line connection module 136, the sealing plate 134 and the control module 132 takes place in this exemplary embodiment by means of the alignment sleeve 146, which is inserted into the widened region 314 of the conductor channels 120 at the upper end of the line connection module 136.
  • an exemplary embodiment of an alignment sleeve 146 is shown by way of example.
  • the alignment sleeve 146 has an external cylindrical shape, with the ends 710 of the alignment sleeve 146 tapered to facilitate insertion of the alignment sleeve 146 into the flared portions 314 of the conductor channels 120.
  • the alignment sleeve 146 is made in this embodiment of an electrically insulating plastic, for example (eg glass fiber filled) PP or PA66 GF35, PA66 GF 30, PPS GF35 or PPS GF30. Alternatively, for example, a ceramic material can be used.
  • the alignment sleeve 146 is in this embodiment mirror-symmetrical to a mirror plane 712. This facilitates the installation of the fuel injector considerably, since the risk of confusion between the two ends of the alignment sleeve 146, which would result in asymmetrical alignment sleeve 146 to Gravmonatge is eliminated (" Poka Yoke ").
  • the alignment sleeve 146 Inside the alignment sleeve 146 is a bore which is rotationally symmetrical to a sleeve axis 714.
  • the bore is subdivided into two outer capture regions 716 and an inner alignment region 718.
  • the bore in the region of the capture region 718 has a cylindrical, parallel to the sleeve axis 714 Course on.
  • the catching regions 716 initially have a first conical region 720 with an opening angle of 30 ° in this exemplary embodiment (ie a wall inclination of 15 ° to the sleeve axis 714). This is followed by a cylindrical region 722 with a larger diameter than the bore of the alignment region 718.
  • the end of the snubbing hose 212 may be accommodated, so that the solid conductor 118 is continuously insulated electrically with respect to the fuel injector.
  • a second conical region 724 which immediately leads into the alignment region 718, adjoins the cylindrical region 722.
  • the pipe wall in this embodiment again an opening angle of 30 ° (ie, in turn, an angle of 15 ° to the sleeve axis) 714.
  • the alignment sleeve 146 can also be designed as a double alignment sleeve 146, wherein, for example, two alignment sleeves of the in FIG. 7 illustrated embodiment are connected in parallel with each other, wherein each of the sleeve axes 714 are spaced so that they correspond to the distance of the conductor channels 120.
  • FIGS. 8 and 9 the assembly of the control module 132, the sealing plate 134 and the line connection module 138 is shown FIG. 8 shown before joining, wherein the sealing plate 134 has already been placed on the control module 132, the sealing plate 134 is still separated along the dividing line 126 from the line connection module 136.
  • FIG. 9 alls modules are shown assembled. For assembly, first the solid conductor 118 through the conductor channels of the pressure booster module 138 (see FIG. 6 ) and the line connection module 136.
  • the shrink tube 212 which electrically isolates the solid conductor 118 from the injector body 110, terminates at the point 810.
  • the alignment sleeve 146 is inserted into the widened region 314 of the conductor channel 120 of the line connection module 136, so that the upper end 214 of the solid conductor 118 through the Alignment sleeve 146 protrudes and aligned parallel to the injector 142.
  • the alignment sleeve 146 projects out of the line connection module 136.
  • the upper ends 214 of the solid conductors 118 which are now aligned parallel to the injector 142, can be inserted into the plug contacts 122 by the alignment sleeve 146 in the insertion direction 610 parallel to the injector axis by the sealing plate 134 after this alignment.
  • These plug contacts are electrically connected via the electrical connections 144 to the injector contact 116 on the top of the Kraflstoffinjektors.
  • the upper end 214 of the solid conductor 118 is inserted into the plug contact 122.
  • an O-ring 812 is additionally inserted in each case in front of the plug contacts 122 into the conductor channels 120 of the control module 132. This O-ring 812 prevents fuel, particularly diesel oil, from entering the control module 132.
  • the "wet area" of the modules 134, 136, 138 and 140 is separated from the "dry" control module 132 by the O-rings 812.
  • these modules are screwed together by means of a union nut 814.
  • this gland and also the electrical plug connection of the solid conductor 118 and the Plug contact 122 easily detachable again, so that for example in a simple manner and without the need for a soldering individual modules can be replaced or checked.
  • FIG. 10 a flowchart of a method according to the invention for producing a fuel injector according to the invention is shown.
  • the method is not limited to the illustrated steps, and additional, in FIG. 10 not shown process steps are performed.
  • the method can also be carried out in a sequence other than the sequence shown. The method can be, for example, based on in the FIGS. 8 and 9 clarify the arrangements shown.
  • a first module for example the control module 132, of the fuel injector is produced.
  • the first module 132 should have at least one injector body contact 116.
  • a second module is produced, which may, for example, be the nozzle module 140.
  • This second module 140 should have at least one electrically controllable valve 112 with at least one electrical valve contact 114.
  • the at least one electrical valve contact 114 is connected to at least one electrical solid conductor 118 that is dimensionally stable under its own weight.
  • the at least one solid conductor 118 is then forced in step 1016 by at least one alignment sleeve 146 wholly or partially a vorween inclination to the injector 142. Subsequently, the two modules 132, 140 are directly or indirectly (see for example FIG. 8 and 9 ) is connected to an injector body 110, wherein the at least one solid conductor 118 is connected reversibly directly or indirectly (ie, for example via an electrical connection 144) in step 1018 with the at least one injector body contact 116.
  • the described arrangement in one of its configurations and the inventive method for producing the fuel injectors described represents a significant improvement over conventional methods and arrangements in which electrical cables are used for connection between the valve contacts 114 and the injector body contacts 116. Elaborate soldering processes and tedious passage of cables through the individual modules of the injector 110 thus omitted. As a result, the mounts of the fuel injectors and also a corresponding maintenance of the fuel injectors are greatly simplified.
  • FIGS. 11 to 13 a second embodiment of a fuel injector according to the invention is shown in partial section.
  • the fuel injector points an injector body 110, which is modular and along the dividing lines 124, 126, 128 and 130 in a control module 132, a sealing plate 134, a line connection module 136, a pressure booster module 138 and a nozzle module 140 can be dismantled.
  • the fuel injector has a valve disposed in the nozzle module 140 solenoid valve 112, which via two valve contacts 114 (in FIG. 11 lying one behind the other) can be contacted electrically.
  • valve contacts 114 are connected via solid conductors 118, which in turn extend through corresponding conductor channels 120, with electrical plug contacts 122.
  • FIG. 11 no single alignment sleeve 146 is used, but a double alignment sleeve 146.
  • This double alignment sleeve 146 which in a perspective view in FIG. 12 2, the two solid conductors 118 can align simultaneously.
  • the structure is the in FIG. 11 and FIG. 12 shown double alignment sleeve 146 designed similar to the embodiment according to FIG. 7 However, only one half of the alignment sleeve 146 according to FIG. 7 is used (for example, half left of the mirror plane 712).
  • the alignment sleeve 146 has essentially two areas, a catch area 716 and an alignment area 718.
  • the catch area 716 serves again, as in the embodiment according to FIG. 7, the "capture tolerance", ie the tolerance of the angle under which the alignment sleeve 146 can absorb an angled to the injector 142 in the alignment sleeve entering solid conductor 118 can increase.
  • the catching area 716 again has a larger diameter than the solid conductor 118.
  • the alignment region 718 comprises a substantially cylindrical region in which a direction parallel to the injector axis 142 is imposed on the solid conductor 118.
  • the alignment sleeve 146 is not plugged into the line connection module 136, but into a conductor channel 120 in the sealing plate 134.
  • This conductor channel 120 is, as in FIG. 13 illustrated, designed in this case for both solid conductors as a common conductor channel 120, ie in the form of a slot 120.
  • the two conductor channels 120 of the two solid conductors 118 are designed as separate holes.
  • the conductor channels 120 have an inclination of 1 ° with respect to the injector axis 142 in the region of the pressure booster module 138, in FIG In the region of the line connection module 136, an inclination of 1.795 ° in each case to the injector axis and in the sealing plate 134 finally an inclination of 0 °.
  • the solid conductors 118 are connected to the valve contacts 114.
  • the line connection module 136 and the pressure booster module 138 are connected to each other (for example, by a union nut).
  • the line connection module 136 and the pressure booster module 138 are placed together on the nozzle module 140, with the solid conductors 118 being pushed through the conductor channels 120 of the pressure booster module 136 and the line connection module 138.
  • the pressure translator module 138 is connected to the nozzle module 140, for example, again by a union nut.
  • control module 132 is prepared for connection to the line connection module 136.
  • the O-rings 812 as in particular in FIG. 13 and FIG. 11 to be inserted into the conductor channels 120 of the control module 132, so that these O-rings 812 come to lie directly in front of the plug contacts 122, and seal them against the ingress of fuel.
  • the sealing plate 134 is placed on the control module 132 and connected thereto via a union nut 1110.
  • the double alignment sleeve 146 as in FIG. 13 shown inserted into the conductor channel 120 (slot) of the sealing plate 134.
  • the double alignment sleeve 146 preferably terminates flush with the surface of the sealing plate 134 facing the second parting line 126, or may also protrude slightly beyond it. A slight sinking of the double alignment sleeve 146 in the sealing plate 134 is conceivable.
  • control module 132 is applied with attached sealing plate 134 and inserted alignment sleeve 146 to the line connection module 136.
  • solid conductor 118 from the capture portions 716 of the double Ausrichthülsen 146 gripped and the alignment of the 718 double sealing sleeve 146 at an angle aligned by 0 ° to the injector 142, so that the solid conductors 118 can enter through the O-rings 812 in the plug contacts 122 and there, for example, a frictional, electrical connection with the plug contacts 122 can enter, creating an electrical connection between the valve contacts 114 and the injector body contact 116 is formed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (8)

  1. Injecteur de carburant pour l'injection de carburant dans une chambre à combustion d'un moteur à combustion interne, dans lequel l'injecteur de carburant présente ce qui suit :
    a) un corps d'injecteur (110) avec un axe d'injecteur (142) ;
    b) au moins une soupape (111, 112) pouvant être commandée électriquement et incorporée dans le corps d'injecteur (110), au moins une soupape commandable électriquement (112) présentant au moins un contact de soupape électrique (114) ;
    c) au moins un contact de corps d'injecteur électrique (116) accessible depuis un côté extérieur du corps d'injecteur (110) ; et
    d) au moins un canal conducteur (120) dans au moins une première région ou un premier module (132, 134, 136, 138,) du corps d'injecteur (110) présentant une inclinaison vers l'axe d'injecteur (142) différente par rapport à au moins une deuxième région ou un deuxième module (134, 136, 138) ; et caractérisé en ce que,
    - l'au moins un contact de soupape électrique (114) et l'au moins un contact de corps d'injecteur électrique (116) sont connectés au moins en partie par le biais d'au moins un conducteur massif électrique (118) de forme essentiellement stable sous l'effet de son propre poids, l'au moins un conducteur massif (118) s'étendant à travers au moins un canal conducteur (120) ;
    - en ce qu'au moins un conducteur massif (118) dans au moins un module (132, 134, 136, 138) est forcé par au moins une douille d'alignement (146) complètement ou en partie dans une inclinaison prédéfinie vers l'axe d'injecteur (142) de sorte que ce conducteur massif est ainsi orienté.
  2. Injecteur de carburant selon la revendication précédente, caractérisé en ce qu'au moins une douille d'alignement (46) est disposée dans le canal conducteur (120) dans un premier module (136, 134), la douille d'alignement (146) forçant au moins un conducteur massif (118) essentiellement dans une inclinaison d'un canal conducteur (120) dans un deuxième module (132) différent du premier module (136) et de ce fait alignant ce conducteur massif.
  3. Injecteur de carburant selon l'une quelconque des deux revendications précédentes, caractérisé en ce qu'au moins une douille d'alignement (146) force au moins un conducteur massif (118) dans une orientation par rapport à l'axe d'injecteur (142) essentiellement parallèle.
  4. Injecteur de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une douille d'alignement (146) présente au moins une région de réception (716) et au moins une région d'alignement (718).
  5. Injecteur de carburant selon la revendication précédente, caractérisé en ce qu'au moins une région de réception (716) présente au moins une région tubulaire (720, 724) s'étendant coniquement suivant un angle différent de zéro par rapport à un axe de la douille (714).
  6. Injecteur de carburant selon l'une quelconque des deux revendications précédentes, caractérisé en ce qu'au moins une région d'alignement (718) présente au moins une région tubulaire (718) s'étendant de manière cylindrique.
  7. Injecteur de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce que la douille d'alignement (146) est configurée sous forme de douille d'alignement double (146) en vue de l'alignement simultané de deux conducteurs massifs (118).
  8. Procédé de fabrication d'un injecteur de carburant présentant un axe d'injecteur (142) pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne, comprenant les étapes suivantes :
    a) fabrication d'un premier module (132) de l'injecteur de carburant, le premier module (132) présentant au moins un contact de corps d'injecteur (116) ;
    b) fabrication d'un deuxième module (140), le deuxième module (140) présentant au moins une soupape à commande électrique (112) comprenant au moins un contact de soupape électrique (114) ;
    c) connexion de l'au moins un contact de soupape électrique (114) à au moins un conducteur massif électrique (118) de forme essentiellement stable sous l'effet de son propre poids ;
    d) orientation d'au moins un conducteur massif (118) de force par au moins une douille d'alignement (146) de manière complète ou partielle avec une inclinaison prédéterminée par rapport à l'axe d'injecteur (142) ; et
    e) connexion des deux modules (132, 140) de manière directe ou indirecte à un corps d'injecteur (110), l'au moins un conducteur massif (118) étant connecté de manière réversible, directement ou indirectement, à l'au moins un contact de corps d'injecteur (116).
EP05817307A 2005-01-31 2005-12-14 Alignement de pontages electriques dans des injecteurs Not-in-force EP1846654B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005004320A DE102005004320A1 (de) 2005-01-31 2005-01-31 Ausrichtung elektrischer Überbrückungen in Injektoren
PCT/EP2005/056788 WO2006081895A1 (fr) 2005-01-31 2005-12-14 Alignement de pontages electriques dans des injecteurs

Publications (2)

Publication Number Publication Date
EP1846654A1 EP1846654A1 (fr) 2007-10-24
EP1846654B1 true EP1846654B1 (fr) 2012-04-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05817307A Not-in-force EP1846654B1 (fr) 2005-01-31 2005-12-14 Alignement de pontages electriques dans des injecteurs

Country Status (6)

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US (1) US7770824B2 (fr)
EP (1) EP1846654B1 (fr)
AT (1) ATE553295T1 (fr)
DE (1) DE102005004320A1 (fr)
ES (1) ES2382093T3 (fr)
WO (1) WO2006081895A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10544771B2 (en) * 2017-06-14 2020-01-28 Caterpillar Inc. Fuel injector body with counterbore insert

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712591A1 (de) * 1997-03-26 1998-10-01 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung sowie Verwendung eines Brennstoffeinspritzventils
DE10039218A1 (de) * 2000-08-11 2002-02-28 Bosch Gmbh Robert Piezoelektrische Aktuatoranordnung, inbesondere zur Betätigung eines Ventils in einem Kraftfahrzeug
DE10108464A1 (de) * 2001-02-22 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
US6875058B2 (en) * 2002-05-31 2005-04-05 Caterpillar Inc. Electrical adapter for a fuel injector with two sets of connectors

Also Published As

Publication number Publication date
EP1846654A1 (fr) 2007-10-24
ATE553295T1 (de) 2012-04-15
DE102005004320A1 (de) 2006-08-03
ES2382093T3 (es) 2012-06-05
US7770824B2 (en) 2010-08-10
WO2006081895A1 (fr) 2006-08-10
US20080110442A1 (en) 2008-05-15

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