EP1846654A1 - Ausrichtung elektrischer ]berbr]ckungen in injektoren - Google Patents
Ausrichtung elektrischer ]berbr]ckungen in injektorenInfo
- Publication number
- EP1846654A1 EP1846654A1 EP05817307A EP05817307A EP1846654A1 EP 1846654 A1 EP1846654 A1 EP 1846654A1 EP 05817307 A EP05817307 A EP 05817307A EP 05817307 A EP05817307 A EP 05817307A EP 1846654 A1 EP1846654 A1 EP 1846654A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injector
- module
- conductor
- alignment sleeve
- alignment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims abstract description 166
- 239000007787 solid Substances 0.000 claims abstract description 108
- 239000000446 fuel Substances 0.000 claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 22
- 238000007789 sealing Methods 0.000 description 27
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229920001169 thermoplastic Polymers 0.000 description 5
- 239000004416 thermosoftening plastic Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229920000069 polyphenylene sulfide Polymers 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910016347 CuSn Inorganic materials 0.000 description 1
- 229920007306 PPS GF30 Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- MOFOBJHOKRNACT-UHFFFAOYSA-N nickel silver Chemical compound [Ni].[Ag] MOFOBJHOKRNACT-UHFFFAOYSA-N 0.000 description 1
- 239000010956 nickel silver Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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 injection systems for direct-injection internal combustion engines use 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, in contrast to a simple cable or wire, and instead of a solder connection, for example can also be contacted via plug contacts. Slight plastic deformations of the solid conductor under the action of its own weight and under additional force can be accepted when 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 inclination angle when it is led 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 is wholly or partially forced into a predetermined inclination, for example the inclination 0 °, to the injector axis.
- a solid conductor when driving out of a conductor channel of a module of the inclination angle of the conductor channel can be imposed in an adjacent or another module, in which the solid conductor is subsequently introduced.
- Figure 1 is a sectional view of a fuel injector with a solenoid valve for nozzle needle control and a solid conductor for electrically connecting the solenoid valve with an external InjekorintelligenceTER;
- Figure 2 shows the solenoid valve with its two electrical valve contacts and fixed to the valve contacts solid conductors
- FIG. 3 is a sectional view of a section of a line connection module to illustrate the problem of adjusting the angle of inclination of the solid conductor
- Figure 4 is a plan view of an angular adjustment of two solid conductors by means of a prism
- Figure 5 is a side view of an alignment of a solid conductor by means of a stopper and a prism
- Figure 6 is a sectional view of a section of an injector body to illustrate the effect of an alignment sleeve
- Figure 7 shows an embodiment of an alignment sleeve
- FIG. 8 is a sectional view of a section of an injector body prior to the insertion of a solid conductor into a plug contact
- FIG. 9 is a sectional view of the detail according to FIG. 8 after inserting the solid conductor into the plug contact;
- FIG. 10 shows a flow chart of a method according to the invention for producing a fuel injector
- Figure 11 is a sectional view of a second embodiment of an injector body with a double alignment sleeve
- FIG. 12 is a perspective view of the double alignment sleeve shown in the exemplary embodiment according to FIG. 11;
- FIG. 13 shows a perspective view of a plug-in operation of the double alignment sleeve shown in FIG. 12 into a conductor channel designed as a slot in the sealing plate of the exemplary embodiment according to FIG. 11.
- FIG. 1 shows an overall view of an injector body 110 for a common rail injection system.
- 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
- the pressure translator module 138 essentially serves to translate a fuel pressure, which is provided by an external pressure source, for example via a high-pressure common rail, to the fuel injector (for example 1000 bar) into a second pressure (for example 2200 bar) so that 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) ,
- a first solenoid valve 111 arranged in the control module 132 for controlling the pressure transmission in the pressure booster module 138
- a second solenoid valve 112 arranged in the nozzle module 140 for controlling the actual injection process via a valve needle (not shown)
- the separation between the control module 132 of remaining injector body 110 along the first separation line 124 This separability causes the (“dry") control module 132 and the ("wet") part of the injector body below the first separation line 124 110 can be designed, manufactured and tested separately to be assembled afterwards.
- this separability for maintenance purposes for example, easily replace individual components of the injector body 110.
- 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 that further ensures 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 takes place in this embodiment partially via two solid conductors 118.
- the solid conductors 118 extend through the two conductor cables.
- nals 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 fixedly 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 selected to be sufficiently rigid that on the one hand they do not substantially change their shape under their own weight and thus easily slide through the conductor channels 120 with their different inclinations to the injector axis 142 and insert 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 if 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 sub-0 ° to the injection axis 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.
- 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 a welding filler.
- CuSn6 with a Brinell hardness between 80 and 90 HB
- 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.
- PPS or PA in particular glass fiber-filled PPS or PA (eg PPS GF 30 or PA 66 GF 30), may be used as the thermoplastic material, among other alternatives, in which case glass-fiber filling additionally reinforces 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 substantially maintain their orientation, which in the installation of the injector body 110, a passage of the solid conductors 118 through the conductor channels 120 of the individual modules 138, 136, 134 and a subsequent insertion into the plug contacts 122 facilitates. Furthermore, the thermoplastic 210 of the joints electrically isolated from each other, so that no short circuits between the valve contacts 114 may occur. Compared to conventional wire connections or cable connections so the assembly of the injector body 110 is greatly simplified. Furthermore, 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 in order to save costs, but only in some sections.
- the shrink tubing 212 extends upwardly from the electrically insulating thermoplastic 210.
- a heat-shrinkable tube 212 it is also possible, for example, to use rigid or elastic, electrically insulating plastic sleeves as electrical insulation of the solid conductors 118.
- 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 shows a sectional representation of a section of the line connection module 136, by means of which the problem of adjusting the angle of inclination described above is to be clarified.
- 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 at its upper, the sealing plate 134 facing end 310 via an annular shoulder 312.
- 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 protrudes in this embodiment.
- Example by h ' 10.5 mm out of the line connection module 136 out.
- the upper end 214 of the solid conductor 118 may in the worst case have an inclination angle ⁇ to the injector axis 142 of 2.8 °.
- 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 for it to be reliably received by the plug contacts 122 (see FIG. 1).
- FIGS. 4 and 5 show a possible measure by means of which the problem of adjusting the angle of the solid conductors 118 can be overcome when assembling the individual modules 136, 134 and 132.
- the line connection module 136 with solid conductors 118 projecting from the conductor channels 120 is shown in plan view, in a side view in FIG.
- the ends 214 of the solid conductors 118 Prior to mating of sealing plate 134 (not shown in FIGS. 4 and 5) 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 near their exit from the conductor channels 120 by means of the stop 412 in their position, wherein a force is exerted against the solid conductors 118 in the direction of arrow 414. Subsequently, the upper ends 214 of the solid conductors 118 are inserted into two grooves 416 of the prism 410 and in the direction of deformation 418 by means of the prism 410 a force is exerted on the ends 214 of the solid conductors 118.
- the method illustrated in FIGS. 4 and 5 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.
- FIG. 6 shows a sectional view of the entire profile of the conductor channel 120 from the valve contacts 114 to the plug-in contacts 122.
- FIG. 7 shows a sectional illustration of an alignment sleeve 146.
- FIGS. 8 and 9 show the joining together of the line connection module 136, the sealing plate 134 and the control module 132 by means of the alignment sleeve 146.
- two solid conductors 118 are connected to the valve contacts 114 of a solenoid valve 112 (not shown in FIG. 6).
- These solid conductors 118 are inserted one after the other in the insertion direction 610 through the conductor channels 120 of the pressure booster module 138, the line connection module 136, the sealing plate 134 and the control module 132.
- 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 termination 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.
- FIG. 7 shows by way of example an embodiment of an alignment sleeve 146.
- the alignment sleeve 146 is externally cylindrical in 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 shrinking tube 212 may be accommodated, so that the solid conductor 118 is continuously electrically insulated from the fuel injector.
- a second conical region 724 which opens directly into the alignment region 718, adjoins the cylindrical region 722.
- the pipe wall again has an opening angle of 30 ° (ie, again an angle of 15 ° to the sleeve axis) 714.
- the alignment sleeve 146 can also be configured as a double alignment sleeve 146, wherein, for example, two alignment sleeves are connected in parallel to each other by the embodiment shown in FIG. 7, wherein the sleeve axes 714 are spaced such that they correspond to the spacing of the conductor channels 120 correspond.
- FIGS. 8 and 9 show the assembly of the control module 132, the sealing plate 134 and the line connection module 138.
- the fuel injector is shown in Figure 8 prior to assembly, wherein the sealing plate 134 has already been placed on the control module 132, the sealing plate 134, however, is still separated along the dividing line 126 of the line connection module 136.
- Figure 9 alls modules are shown assembled. For assembly, first the solid conductor 118 is pushed 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 axis 142, can be inserted into the plug contacts 122 parallel to the injector axis by the alignment plate 146 in the insertion direction 610 through the alignment sleeve 146.
- These plug contacts are electrically connected via the electrical connections 144 to the injector contact 116 on the upper side of the fuel injector.
- 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 are separated from the "dry" control module 132.
- these modules are screwed against each other 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 shows a flow chart of a method according to the invention for producing a fuel injector according to the invention.
- the method is not limited to the illustrated steps, and additional method steps not shown in FIG. 10 may also be performed.
- the method can also be carried out in a sequence other than the sequence shown. The method can be illustrated, for example, with reference to the arrangements shown in FIGS. 8 and 9.
- 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 mass 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 connected directly or indirectly (see for example FIGS. 8 and 9) to an injector body 110, wherein the at least one solid conductor 118 reversibly directly or indirectly (ie, for example via an electrical connection 144) in step 1018 with the at least one injector body contact 116 is connected.
- the described arrangement in one of its embodiments 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 body 110 thus eliminated. 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 show a partial sectional illustration of a second exemplary embodiment of a fuel injector according to the invention.
- the fuel injection tor an injector 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 again has a solenoid valve 112 arranged in the nozzle module 140, which can be electrically contacted via two valve contacts 114 (one behind the other in FIG. 11).
- valve contacts 114 are connected via solid conductors 118, which in turn extend through corresponding conductor channels 120, with electrical plug contacts 122.
- this double alignment sleeve 146 which is shown in a perspective view in FIG. 12, can align the two solid conductors 118 at the same time.
- the double alignment sleeve 146 shown in FIG. 11 and FIG. 12 is designed similarly to the exemplary embodiment according to FIG. 7, but only one half of the alignment sleeve 146 according to FIG. 7 is used (for example the half left of the mirror plane 712).
- the alignment sleeve 146 has substantially two areas, a capture region 716 and an alignment region 718.
- the capture region 716 serves as in the exemplary embodiment according to FIG. 7, to increase the "capture tolerance", ie the tolerance of the angle at which the alignment sleeve 146 can receive a solid conductor 118 which enters the alignment sleeve at an angle to the injector axis 142.
- 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 the mass conductor 118 is forced in a direction parallel to the injector axis 142.
- the alignment sleeve 146 is not inserted into the line connection module 136 but into a conductor channel 120 in the sealing plate 134.
- This conductor channel 120 is, as shown in FIG. 13, in this case for both Solid conductor designed 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, wherein the solid conductors 118 are pushed through the conductor channels 120 of the pressure booster module 136 and the line closure 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 termination module 136.
- the O-rings 812 as can be seen in particular in Figure 13 and Figure 11, 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 these against ingress from fuel seal.
- 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 shown in Figure 13, 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.
- control module 132 and intensifier 134 on the line connection module 136, the pressure booster module 138 and the Du- Senmodul 140 existing unit follows by blind joining, since due to the use of the double alignment sleeve 146 an adjustment of the solid conductor 118 is no longer required.
Landscapes
- 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)
Description
Claims
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 (de) | 2005-01-31 | 2005-12-14 | Ausrichtung elektrischer überbrückungen in injektoren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1846654A1 true EP1846654A1 (de) | 2007-10-24 |
EP1846654B1 EP1846654B1 (de) | 2012-04-11 |
Family
ID=35677605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05817307A Not-in-force EP1846654B1 (de) | 2005-01-31 | 2005-12-14 | Ausrichtung elektrischer überbrückungen in injektoren |
Country Status (6)
Country | Link |
---|---|
US (1) | US7770824B2 (de) |
EP (1) | EP1846654B1 (de) |
AT (1) | ATE553295T1 (de) |
DE (1) | DE102005004320A1 (de) |
ES (1) | ES2382093T3 (de) |
WO (1) | WO2006081895A1 (de) |
Families Citing this family (1)
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)
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 |
-
2005
- 2005-01-31 DE DE102005004320A patent/DE102005004320A1/de not_active Withdrawn
- 2005-12-14 ES ES05817307T patent/ES2382093T3/es active Active
- 2005-12-14 WO PCT/EP2005/056788 patent/WO2006081895A1/de active Application Filing
- 2005-12-14 EP EP05817307A patent/EP1846654B1/de not_active Not-in-force
- 2005-12-14 US US11/722,531 patent/US7770824B2/en active Active
- 2005-12-14 AT AT05817307T patent/ATE553295T1/de active
Non-Patent Citations (1)
Title |
---|
See references of WO2006081895A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1846654B1 (de) | 2012-04-11 |
US20080110442A1 (en) | 2008-05-15 |
US7770824B2 (en) | 2010-08-10 |
ATE553295T1 (de) | 2012-04-15 |
ES2382093T3 (es) | 2012-06-05 |
DE102005004320A1 (de) | 2006-08-03 |
WO2006081895A1 (de) | 2006-08-10 |
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