EP1714024A1 - Cable leadthrough and fuel system part with a cable leadthrough - Google Patents

Cable leadthrough and fuel system part with a cable leadthrough

Info

Publication number
EP1714024A1
EP1714024A1 EP04802770A EP04802770A EP1714024A1 EP 1714024 A1 EP1714024 A1 EP 1714024A1 EP 04802770 A EP04802770 A EP 04802770A EP 04802770 A EP04802770 A EP 04802770A EP 1714024 A1 EP1714024 A1 EP 1714024A1
Authority
EP
European Patent Office
Prior art keywords
holding
conical
fuel
cone
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04802770A
Other languages
German (de)
French (fr)
Other versions
EP1714024B1 (en
Inventor
Juergen Hanneke
Bernd Streicher
Arzu Schilling
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
Priority to DE200410004706 priority Critical patent/DE102004004706A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to PCT/DE2004/002557 priority patent/WO2005073547A1/en
Publication of EP1714024A1 publication Critical patent/EP1714024A1/en
Application granted granted Critical
Publication of EP1714024B1 publication Critical patent/EP1714024B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00Other 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
    • F02M63/0012Valves
    • F02M63/0014Valves characterised by the valve actuating means
    • F02M63/0015Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027Electrically actuated valves draining the chamber to release the closing pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166Selection of particular materials

Abstract

A cable leadthrough (41), particularly a high-pressure cable leadthrough for fuel systems, comprising an at least partially conical-shaped conical body (45,46) and at least one retaining body (55) which is connected to the conical body (45,46). The retaining body (44) is provided with at least one through opening (56). At least one electrically conducting wire (31,32) is guided through the through opening (56). The connection between the conical body (45) and the retaining body (55) is embodied in a sealing manner and the wire (31,32) is connected to the retaining body (55) in the through opening (56) in such a way that the wire (31,32) is maintained in the through opening (56) and the through opening (56) is sealed. The invention also relates to a fuel system part, particularly a fuel injection valve (1), which is provided with said cable leadthrough (41,42) and which also comprises a component (12) which can be impinged upon with fuel at high pressure.

Description


   <Desc / Clms Page number 1>
 



   Cable entry and fuel system part with one
The invention relates to a cable bushing, in particular a high-pressure cable bushing for fuel systems, and a fuel system part with such a cable bushing, in particular a fuel injection valve.



  DE 40 05 455 AI discloses a fuel injection valve with a piezoelectric actuator and a valve closing body which can be actuated by means of a valve needle and which cooperates with a valve seat surface to form a sealing seat.



  The actuator is arranged on the end of the fuel injection valve facing away from the injection side and is sealed via a spring membrane extending over the cross section of the fuel injection valve against a fuel introduced laterally and in the spraying direction below the spring membrane. The spring diaphragm therefore divides the fuel injector into a fuel-filled spray-side section and a fuel-sealed section in which the actuator is located. The sealed portion of the fuel injector faces

 <Desc / Clms Page number 2>

 an electrical connection via which an electrical lead is guided to the control element of the actuator. The electrical connection is plugged into a hole in the side of the valve housing of the fuel injector.



  A disadvantage of the fuel injector known from DE 40 05 455 AI is that the fuel can only be introduced into the fuel injector via a fuel inlet connection which is attached to the side of the valve housing and is located in the spray direction below the spring membrane. In particular, the fuel cannot be introduced into the fuel injection valve via the end of the valve housing opposite the injection side. The disadvantageous position of the fuel inlet connector increases both the length and the diameter of the fuel injector.



  In addition, the connection of a suitable fuel supply to the fuel inlet connection is made more difficult.



  The fuel injector known from DE 40 05 455 AI also has the disadvantage that the spring membrane forms a large cross-sectional area, so that a large force acts on the fastening points of the spring membrane due to the fuel pressure. The known fuel injector is therefore unsuitable for high pressures, such as z. B. are required when injecting diesel fuel. But even at lower pressures, the spring membrane can be damaged, which is further promoted by the movements of the spring membrane on the side of the valve needle when the fuel injector is actuated.

 <Desc / Clms Page number 3>

 



  Another disadvantage of the fuel injector known from DE 40 05 455 AI is that the actuator is not protected against substances penetrating via the joint between the valve housing and the electrical connection.



  In addition, the connection of the electrical connection to an electrical contact of the actuator is complex since the actuator is introduced into the valve housing through an opening at the end and the electrical connections are guided laterally to the actuator.



  Advantages of the invention The cable bushing according to the invention with the features of claim 1 has the advantage that a self-reinforcing seal can be formed, i. H. a seal, the sealing effect of which increases with the exposure to it. The cable bushing can be used in particular as a high-pressure cable bushing for fuel systems, i. H. for example in a pump, a fuel storage container (common rail) or a fuel injector. The fuel system part according to the invention with the features of claim 10 has the advantage that the interaction of the cone body with the conical recess of the component creates a self-reinforcing seal, the sealing effect of which increases with increasing exposure.



  Compared to the prior art, there is the further advantage that a universally applicable solution is created which ensures great flexibility, in particular with regard to the arrangement of the electrical connections and the fuel supply.



  The measures listed in the dependent claims 2 to 9 advantageous refinements of the cable bushing specified in claim 1 are possible. By in the

 <Desc / Clms Page number 4>

 dependent claim 11 measure an advantageous development of the fuel system part specified in claim 10 is possible.



  The conical body advantageously comprises an at least substantially axial or coaxial recess in which the holding body is arranged. As a result, the compact construction of the cable bushing can be further improved and a uniform application of the seals formed can be achieved.



  It is also advantageous that the recess of the cone body has at least one step on which the holding body is supported. As a result, even with a high loading of the holding body, for. B. due to a very high fuel pressure, prevents displacement of the holding body in the cone body.



  It is also advantageous that a thread is provided in the recess of the cone body, at least in sections, in which the holding body engages.



  In particular, the thread can be provided at one end of the recess. The thread can be formed in a bore in the cone body in a simple manner and also offers the advantage that a reliable hold of the holding body is ensured.



  Furthermore, it is advantageous that the recess of the cone body is a cone bore and that the holding body is at least essentially conical and is inserted in the cone bore of the cone body, a seal being formed on the cone bore between the holding body and the cone body. As a result, a between the holding body and the cone body at the cone bore

 <Desc / Clms Page number 5>

 self-reinforcing seal created, the sealing effect increases with increasing exposure.



  The holding body is advantageously made of glass and the wire is melted into the holding body.



  This can e.g. B. can be achieved in that a glass-coated wire is introduced into the cone body, the parts are heated above the temperature of the yield point of glass and then the soft glass is pressed on both sides into the cone body. The flowable glass material adapts to the shape specified by the recess in the cone body, as a result of which the holding body is formed.



  The flowing glass material wraps around a shoulder, for example, or flows into a thread of the cone body. Since the holding body insulates the wire from the cone body, the cone body can be formed from a conductive material, e.g. B. a steel.



  It is advantageous here that the conical body has at least the same and preferably a larger expansion behavior than the holding body when the temperature changes required to melt the wire into the hollow body. As a result, the conical body preferably contracts more strongly than the glass body during cooling, so that the conical body exerts pressure on the holding body after cooling.



  It is advantageous that the holding body and / or the cone body is made of technical ceramic. In this case, the holding body and the conical body can also be formed from the same technical ceramic, in particular in one piece. The holding body and / or the cone body can then be shaped by shaping in a mold and / or by grinding. Training from technical ceramics has the advantage that

 <Desc / Clms Page number 6>

 good insulation of the wire is achieved and that there is a very high compressive strength. Alternatively, the holding body and / or cone body can also be formed from a plastic, in particular from a glass fiber reinforced plastic.



  It is advantageous that a change in the shape and / or the size of the cross-sectional area of the wire is provided at least at one point in the area of the through opening of the holding body in order to produce a positive connection between the wire and the holding body.



  For example, the wire can have compression or crushing at one or more points. In addition, the wire can be band-shaped, at least in sections, i.e. H. be flat, formed and have points at which a rotation of the band-shaped wire about its longitudinal axis, for. B. at 90, takes place. This further improves the connection between the holding body and the wire and at least largely prevents movement of the wire in the holding body.



  It is advantageous that the component of the fuel system part, in particular of the fuel injection valve, is made of hardened steel. This ensures high component strength. Since the component thus consists of a material which at least partially changes its properties when the temperature rises significantly, i. That is, that the component is made of a temperature-sensitive material, a conical recess is worked into the recess, into which the cable bushing is inserted.



  The cable entry itself can be heated considerably during manufacture, e.g. B. for melting the holding body, if it is made of glass, or for heating, in particular baking, of the holding body, if it is made of technical ceramics. The component

 <Desc / Clms Page number 7>

 however, can be temperature sensitive, e.g. B. the hardened steel would at least partially lose the properties achieved by hardening when heated. However, since the cable entry is inserted into the component, the advantages of the properties of the different materials can be combined. The same applies if the component made of another temperature-sensitive material, for. B. is made of a plastic, in particular a hard and fuel-resistant plastic.



  DRAWING Exemplary embodiments of the invention are shown in simplified form in the drawings and are explained in more detail in the description below. 1 shows a first exemplary embodiment of a fuel system part according to the invention in the form of a fuel injection valve in one
Sectional view; FIG. 2 shows the section designated II in FIG. 1; Fig. 3 shows a cone body of an inventive
Cable entry according to the first
Embodiment; 4 shows a cable bushing according to the invention in accordance with the first exemplary embodiment and FIG. 5 shows a cable bushing according to the invention in accordance with an alternative exemplary embodiment.

 <Desc / Clms Page number 8>

 



  DESCRIPTION OF THE EXEMPLARY EMBODIMENTS FIG. 1 shows an axial sectional illustration of a fuel system part designed as a fuel injection valve 1. The fuel injection valve 1 is used in particular for the direct injection of fuel, in particular diesel fuel, into a combustion chamber of a self-igniting internal combustion engine as a so-called diesel injection valve.



  The fuel system part according to the invention can also be a fuel pump, a fuel storage chamber (common rail) or another fuel system part of a fuel system.



  The fuel injector 1 has a first valve housing part 2, a second valve housing part 3 and a third valve housing part 4. The third valve housing part 4 is indirectly connected to the first valve housing part 2 through the second valve housing part 3 by the third valve housing part 4 being screwed onto the first valve housing part 2 by means of a thread 5, the third valve housing part 4 being attached to a shoulder 6 on the second Valve housing part 3 supports.



  The first valve housing part 2 has an interior 10 formed by a recess, in which an actuator 11 consisting of at least one part is provided.



  The actuator 11 is supported on the one hand by a foot 12 on the first valve housing part 2. The foot 12 is made of hardened steel, preferably a hardened alloy steel. On the other hand, the actuator 11 is supported on a head 13. The actuator 11, the foot 12 and the head 13 together form an actuator module.

 <Desc / Clms Page number 9>

 



  A fuel under high pressure is provided in the interior 10 of the fuel injection valve 1 during operation of the fuel injection valve 1. The pressure of the fuel can be 1600 to 2000 bar or more, especially if diesel fuel is used as the fuel. Due to the pressure of the fuel in the interior 10, a force acts on the foot 12 in a direction 14, which presses the foot 12 against the first valve housing part 2. In this way, a hard high-pressure seal is formed between the first valve housing part 2 and the foot 12 of the actuator module, which does not require another sealant.



  When the actuator 11 is actuated, the pressure in a control chamber 15 is influenced by the head 13, so that a nozzle needle 16 is opened or closed.



  The head 13 of the actuator module forms, together with a coupler sleeve 17, a spacer plate 18, a control chamber sleeve 19 and the nozzle needle 16, a hydraulic coupler which can compensate for different thermal expansions of the individual components as well as a translation of the stroke of the actuator 11 into the stroke of the nozzle needle 16 allows.



  So that the actuator module consisting of the actuator 11, the foot 12 and the head 13 can open the nozzle needle 16, a negative pressure difference to the surrounding interior 10 of the fuel injection valve 1 is required when the actuator 11 is actuated in the control chamber 15. In order to prevent the foot 12 of the actuator module from lifting off in the opposite direction 14 from the first valve housing part 2 when the actuator 11 is actuated, as a result of which the high-pressure seal between the foot 12 and the first valve housing part 2 would be opened, a spring 20 is provided, which together

 <Desc / Clms Page number 10>

 maintains the high pressure seal between the foot 12 and the first valve housing part 2 with the high internal pressure in the interior 10.



  The actuator 11 provided in the interior 10 is surrounded by fuel which has a high pressure. In order to seal the actuator 11 against the fuel, the actuator 11 can be surrounded by a casing. The supply of the electrical energy for actuating the actuator 11 is described in more detail below with reference to FIG. 2.



  FIG. 2 shows the section of the fuel injector 1 denoted by II in FIG. 1. Corresponding elements are provided with the same reference numerals in this and in all other figures, as a result of which a repeated description is unnecessary.



  The foot 12 is pressed against the surface 25 of the first valve housing part 2 to form the hard high-pressure seal between the foot 12 and the first valve housing 2. In the interior 10 is the fuel, which has a high pressure, for. B. from the range of 1600 bar to 2000 bar. A space 26 of the first valve housing part 2 of the fuel injection valve 1, which is separated from the interior space 10 by the high-pressure seal, is essentially pressure-free, i. H. has about atmospheric pressure. For this purpose, the space 26 is connected to the outside of the fuel injector 1 by means of an opening 27 in the first valve housing part 2. In addition, two electrical lines (not shown) are led into the space 26, which conduct the electrical energy for actuating the actuator 11 into the fuel injection valve 1.

   The lines can e.g. B. through the openings 27 or through an opening 27 corresponding opening in the room 26. One line is with one

 <Desc / Clms Page number 11>

 first wire 31 is connected and the other line is connected to a second wire 32. The first wire 31 extends into the interior 10 of the first valve housing part 2 of the fuel injector 1 and is connected at a contact point 33 to an electrical contact of the actuator 11. Correspondingly, the second wire 32 is also led into the interior 10 and connected to an electrical contact of the actuator 11 at a contact point 34. In particular in the area of the interior 10 and at the contact points 33 and 34, the wires 31, 32 can be electrically insulated from the fuel provided in the interior 10, e.g.

   B. by a coating of insulating and fuel-resistant paint. The voltage applied to actuate the actuator 11 between the two wires 31, 32 can, for. B. 160 volts to 200 volts.



  The foot 12 has a first stepped bore 35 and a second stepped bore 36. At least a portion 37 of the first stepped bore 35 and a portion 38 of the second stepped bore 36 are conical. As a result, both the section 37 of the first stepped bore 35 and the section 38 of the second stepped bore 36 are conical, the two sections 37 and 38 tapering towards the space 26.



  Through the section 37 of the first stepped bore 35, a conical recess 39 is formed in the foot 12.



  Correspondingly, through the section 38 of the second stepped bore 36, a conical recess 40 is formed in the foot 12. The foot 12 is a component that is subjected to fuel under high pressure on the side of the interior 10, it having the conical recesses 39 and 40. A first cable bushing 41 and a second cable bushing 42 are inserted into the conical recesses 39 and 40. The first cable bushing 41 is as follows

 <Desc / Clms Page number 12>

 described with reference to Figures 3 and 4. An alternative embodiment of the first cable bushing 41 is described with reference to FIG. 5. The design of the second cable bushing 42 corresponds to that of the first cable bushing 41, so that reference can be made to the relevant description.



  3 shows a cone body 45 of the first cable bushing 41. The cone body 45 has an outer side 46, the circumference of which continuously decreases from a first end side 47 to a second end side 48 of the cone body 45. As a result, the outside 46 of the cone body 45 is conical, i. H. the cone body 45 is conical. The conical body 45 is inserted into the first stepped bore 35 shown in FIG. 2 in the region of the first section 37, i. H. inserted into the conical recess 39. The shape of the outer side 46 is adapted to the shape of the conical recess 39, so that a seal results between the outer side 46 and the base 12 in the region of the conical recess 39.



  The cone body 45 has an axial recess 50. The cutout 50 can alternatively also be designed such that its axis is oriented offset parallel to the axis 51 of the cone body 45, so that it is a coaxial cutout 50. Depending on the particular application, however, it is also possible to design the recess 50 such that its axis is inclined or inclined and offset with respect to the axis 51 of the cone body 45.



  In the embodiment of the cone body 45, the recess 50 is designed as a stepped bore. As a result, the recess 50 of the cone body 45 has a step 52.

 <Desc / Clms Page number 13>

 



  In addition, a thread 53 is provided in the recess 50 in the form of a bore at the end of the cone body 45, which lies on the side of the first end face 47.



  FIG. 4 shows an exemplary embodiment of the cable bushing 41 according to the invention. The first cable bushing 41 comprises the cone body 45 shown in FIG. 3 and a holding body 55 provided in the cutout 50. The holding body 55 has a through opening 56 which is cylindrical and whose axis is parallel to the axis 51 of the cone body 45 or coincides with this. The holding body 55 can be made of glass, for example. The first wire 31 extends through the passage opening 56, so that it projects significantly beyond the cone body 45 and the holding body 55 inserted into the cone body 45 both on the first end face 47 and on the second end face 48.



  The cable bushing 41 can be manufactured as follows.



  The glass-clad first wire 31 is inserted into the recess 50 of the cone body 45, the glass cladding having a diameter which is smaller than that of the recess 50, but the glass cladding being on the first end face 47 and / or on the second end face 48 extends further on the wire 31 than shown in FIG. 4. Then the cone body 45, the holding body 55 and the first wire 31, i. H. the entire first cable bushing 41, over the yield point of glass, for. B. heated to 1000 C. The glass projecting on the first end face 47 and / or on the second end face 48 is acted upon in such a way that it is pressed into the recess 50. As a result, the glass also flows into the thread 53 and lies around the step 52 of the cone body 45.

   After cooling the first one

 <Desc / Clms Page number 14>

 The solidified holding body 55 engages the thread 53 in the cable bushing 41. In addition, the solidified holding body 55 is supported on the step 52 of the recess 50 of the cone body 45. With regard to a pressurization of the holding body by the cone body 45 in the cooled state, it is advantageous that a suitably alloyed steel is used for the cone body 45, which has a thermal expansion that is at least somewhat larger than that of the holding body 55 made of glass. In order to avoid stresses in the materials in the transition region between the wire 31 and the holding body 55, the material of the first wire 31 is selected such that the thermal expansion corresponds approximately to that of the holding body 55.



  The first cable bushing 41 is inserted into the conical recess 39 of the foot 12 as shown in FIG. 2. The fuel present in the interior 10 therefore acts on the first cable bushing 41 on the first end face 47 with a force which results from the area of the first end face 47 and the pressure of the fuel in the interior 10. Thus, the first cable bushing 41 is pressed in the direction of the at least approximately pressure-free space 26 into the conical recess 39, so that a self-reinforcing seal between the foot 12 and the first cable bushing 41 on the conical recess 39 results.



  The fuel pressure also acts on the holding body 55 on the side of the first end face 47, so that it is also pressed in the direction of the space 26.



  The holding body 55 is supported both on the step 52 and on the thread 53 of the first cone body 45.



  The thread 53 can also be pitch-free, i.e. H. be formed in the form of grooves. In addition, it is possible that the thread 53 groove-shaped threads, i. H. threads

 <Desc / Clms Page number 15>

 having an approximately rectangular cross-section, or that one or more annular grooves are provided in the recess 50. Furthermore, it is possible that only one of the described means for supporting the holding body 55 is provided in the recess 50 of the cone body 45, specifically only the thread 53 or only the step 52 can be provided in the recess 50 of the cone body 45.



  In addition, the fuel pressure in the interior 10 can also act on the first wire 31, which acts on the wire 31 with a force in the direction of the space 26. Here, the frictional force existing between the wire 31 and the holding body 55 in the region of the through opening 56 is used to hold the first wire 31 in the through opening 56.



  The first cable bushing 41 is fastened in the conical recess 39 by being pressed in, glued in or the like. Alternatively, the first cable bushing 41 can be soldered into the conical recess 39, the soldering being carried out at a low temperature in order at least not to substantially change the properties of the material of the foot 12, in particular in order to maintain the hardness of the foot 12. The diameter of the cone body 45 on the first end face 47 is preferably selected such that, even with possible tolerances of the conical recess 39 and the cone body 45, the cone body 45 in the region 57 of the outside 46 at the first end face 47 bears against the conical recess 39 ,

   This means that, despite tolerances, the cone body 45 is always in contact with the conical recess 39 on the pressure side. This creates an additional radial sealing force that is dependent on the pressure of the fuel in the interior 10.

 <Desc / Clms Page number 16>

 



  In order to compensate for the surface roughness on the outside 46 of the conical body 45 and / or on the section 37 of the conical recess 39, the conical body 45 can be coated with a suitable soft metal layer, e.g. B. with nickel. This further improves the sealing effect.



  5 shows an alternative exemplary embodiment of a cable bushing 41. In this alternative exemplary embodiment, the cutout 50 of the conical body 45 is also conical, the diameter of the cutout 50 decreasing from the first end face 47 to the second end face 48. A thread 53 is also provided. The conical design of the recess 50 generates an additional holding force for holding the holding body 55 in the cone body 45 when the holding body 55 is acted upon on the first end face 47 by the fuel pressure in the interior 10. In addition, the first wire 31 has a point 60 and a point 61 at which a change in the shape and the size of the cross-sectional area of the first wire 31 is provided.

   In the alternative exemplary embodiment shown in FIG. 5, the cross section of the first wire is enlarged at points 60, 61, i. H. At locations 60, 61, the wire 31 is compressed.



  Alternatively, it is also possible for bruises to be provided at the points 60, 61 or for the first wire 31 to be in the form of a ribbon, with the points 60, 61 rotating the first wire 31 around the axis 51 by an angle of, for , B. 90 occurs. A combination of the options mentioned is also conceivable.



  By the glass body 55 formed an insulator is formed, the z at the voltages required for driving the actuator z. B. 160 volts to 200 volts ensures reliable insulation.

 <Desc / Clms Page number 17>

 



  The cable bushing 41 described can also be used for other arrangements by providing a preferably precise conical bore. The cable bushing according to the invention has the advantage that it can be standardized, inexpensive, easy to assemble, saves installation space, can be stored in stock, is self-reinforcing and reliable.

Claims

 Claims 1. Cable bushing (41), in particular high-pressure cable bushing for fuel system, with an at least partially conical conical body (45, 46), at least one holding body (55) connected to the conical body (45, 46), which has at least one through opening (56), and at least one electrically conductive wire (31, 32) which is guided through the through opening (56), the connection between the cone body (45) and the holding body (55) being sealed and the wire (31, 32) in the through opening (56) is connected to the holding body (55) such that the wire (31, 32) is held in the through opening (56) and sealing of the through opening (56) is achieved.
2. Cable bushing according to claim 1, characterized in that the cone body (45) has at least one at least substantially axial or coaxial recess (50) in which the holding body (55) is arranged.
3. Cable bushing according to claim 2,  <Desc / Clms Page number 19>  characterized in that the recess (50) of the cone body (45) has at least one step (52) on which the holding body (55) is supported.
4. Cable bushing according to claim 2 or 3, characterized in that in the recess (50) of the cone body (45) at least in sections, in particular at one end of the recess (50), a thread (53) is provided, into which the holding body ( 55) intervenes.
5. Cable bushing according to one of claims 2 to 4, characterized in that the recess (50) of the conical body (45) is at least substantially conical and that the holding body (55) is at least substantially conical and in the conical recess (50 ) of the conical body (45) is inserted, a seal being formed on the conical recess (50) between the holding body (55) and the conical body (45).
6. Cable bushing according to one of claims 1 to 5, characterized in that the holding body (55) is made of glass and that the wire (31,32) is melted into the holding body (55).
7. Cable lead-through according to claim 6, characterized in that the conical body (45) has at least the same expansion behavior as the holding body (55) in the temperature changes required for melting the wire (31, 32) into the holding body (55).  <Desc / Clms Page number 20>  
8. Cable bushing according to one of claims 1 to 5, characterized in that the holding body (55) and / or the cone body (45) is made of technical ceramics.
9. Cable bushing according to one of claims 1 to 8, characterized in that in the region of the through opening (56) of the holding body (55) to produce a positive connection between the wire (31,32) and the holding body (55) at least at one point (60, 61) a change in the shape and / or the size of the cross-sectional area of the wire (31, 32) is provided.
10. Fuel system part, in particular fuel injection valve (1), with at least one cable bushing (41, 42) according to one of claims 1 to 9 and at least one component (12) which can be acted upon by fuel under high pressure, the component (12) being a has a conical recess (39, 40) into which the cable duct (41, 42) is inserted, and the cone body (45) of the cable duct (41, 42) with the component (12) on the conical recess (39, 40) forms a seal.
11. Fuel system part according to claim 10, characterized in that the component (12) is formed from a hardened steel.
EP04802770.0A 2004-01-30 2004-11-19 Fuel system part with a cable leadthrough Active EP1714024B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200410004706 DE102004004706A1 (en) 2004-01-30 2004-01-30 Cable bushing and fuel system part with a cable bushing
PCT/DE2004/002557 WO2005073547A1 (en) 2004-01-30 2004-11-19 Cable leadthrough and fuel system part with a cable leadthrough

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Publication Number Publication Date
EP1714024A1 true EP1714024A1 (en) 2006-10-25
EP1714024B1 EP1714024B1 (en) 2016-05-11

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EP04802770.0A Active EP1714024B1 (en) 2004-01-30 2004-11-19 Fuel system part with a cable leadthrough

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EP (1) EP1714024B1 (en)
JP (1) JP4320035B2 (en)
CN (1) CN100532822C (en)
DE (1) DE102004004706A1 (en)
WO (1) WO2005073547A1 (en)

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DE102005039567A1 (en) * 2005-08-22 2007-03-01 Robert Bosch Gmbh Arrangement with a piezoelectric actuator and a method for its production
DE102005039550A1 (en) * 2005-08-22 2007-03-01 Robert Bosch Gmbh Arrangement with a piezoelectric actuator and a method for its production
DE102005040198A1 (en) * 2005-08-25 2007-03-01 Robert Bosch Gmbh Arrangement with a piezoelectric actuator
DE102005045230A1 (en) * 2005-09-22 2007-03-29 Robert Bosch Gmbh Arrangement with a piezoelectric actuator and a method for its production
JP4569558B2 (en) * 2006-03-06 2010-10-27 株式会社デンソー Injector
JP4506709B2 (en) * 2006-04-05 2010-07-21 株式会社デンソー Injector
DE102006018916A1 (en) * 2006-04-24 2007-10-25 Siemens Ag Fluid e.g. fuel, injector`s metallic body for internal combustion engine of motor vehicle, has electrical conductors led through ceramic bodies that are fastened to recesses by hard solder joints, and grooves formed outside recesses
DE102007008618A1 (en) 2007-02-22 2008-08-28 Robert Bosch Gmbh Piezo actuator module with a cable feedthrough
DE102007027665A1 (en) 2007-06-15 2008-12-18 Robert Bosch Gmbh Piezo actuator module with cable glands and a method for its production
DE102008003838A1 (en) * 2008-01-10 2009-07-16 Robert Bosch Gmbh Piezoelectric actuator and piezoelectric injector and a method for producing a piezoelectric actuator
DE102008035087B4 (en) * 2008-07-28 2015-02-12 Continental Automotive Gmbh Injector
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Also Published As

Publication number Publication date
JP4320035B2 (en) 2009-08-26
CN100532822C (en) 2009-08-26
DE102004004706A1 (en) 2005-08-18
EP1714024B1 (en) 2016-05-11
WO2005073547A1 (en) 2005-08-11
JP2007500302A (en) 2007-01-11
CN1906398A (en) 2007-01-31

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