EP1961951B1 - Elektrischer Stecker und Verfahren zur Kopplung eines elektrischen Steckers an eine Antriebseinheit - Google Patents

Elektrischer Stecker und Verfahren zur Kopplung eines elektrischen Steckers an eine Antriebseinheit Download PDF

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Publication number
EP1961951B1
EP1961951B1 EP07003683A EP07003683A EP1961951B1 EP 1961951 B1 EP1961951 B1 EP 1961951B1 EP 07003683 A EP07003683 A EP 07003683A EP 07003683 A EP07003683 A EP 07003683A EP 1961951 B1 EP1961951 B1 EP 1961951B1
Authority
EP
European Patent Office
Prior art keywords
conducting element
electrical connector
actuator unit
injector
attenuation zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP07003683A
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English (en)
French (fr)
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EP1961951A1 (de
Inventor
Alessandro Facchin
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.)
Continental Automotive GmbH
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Continental Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to DE602007004567T priority Critical patent/DE602007004567D1/de
Priority to EP07003683A priority patent/EP1961951B1/de
Publication of EP1961951A1 publication Critical patent/EP1961951A1/de
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Publication of EP1961951B1 publication Critical patent/EP1961951B1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/533—Bases, cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure
    • 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
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators

Definitions

  • the invention relates to an electrical connector for an injector and a method for coupling an electrical connector to an actuator unit of an injector.
  • injectors in particular fuel injectors for internal combustion engines are arranged in internal combustion engines in order to dose the fluid into an intake manifold of the internal combustion engine or directly into the combustion chamber of a cylinder of the internal combustion engine.
  • Injectors for an internal combustion engine comprise actuator units.
  • the actuator unit In order to inject fuel, the actuator unit is energized so that a fluid flow through the fluid outlet portion of the injection valve is enabled.
  • the respective injector may be suited to dose fluids under very high pressures.
  • the pressures may be in case of a gasoline engine, for example the range of up to 200 bar or in the case of diesel engines in the range of up to 2,000 bar.
  • the injection of fluids under such high pressures has to be carried out very precisely.
  • the fast changes of the pressure may cause pressure waves in the fluid which leads to pressure waves in different parts of the injector, in particular in the actuator unit.
  • EP 1 445 470 A1 disclose a metering device for dosing pressurized fluids, comprising a housing with a metering opening, controlled by an axially moveable valve needle, an axially extendable piezoelectric actuator, a thermal compensator unit, and an electrical connector for supplying electrical power to the piezoelectric actuator.
  • the electrical connector comprises a connector body with a first set of pins adapted to be connected with an external power supply and a second set of pins electrically connected to the first set of pins and providing electrical contact to the piezoelectric actuator.
  • the first set of pins is rigidly mounted in the connector body and the second set of pins is axially moveably mounted in the connector body.
  • the object of the invention is to create an electrical connector that is simply to be manufactured and which facilitates a reliable and precise function of the injection valve.
  • an electrical connector for an injector comprising a connector body, a pin being mechanically coupled to the connector body and being electrically coupable to a power supply, and an electric conductor being electrically coupled to the pin and being electrically coupable to an actuator unit of the injector, the electric conductor comprising a first conducting element and a second conducting element, the first conducting element having a first rigidity and the second conducting element being elastically deformable and having a second rigidity being smaller than the first rigidity of the first conducting element, and the first conducting element being coupled electrically to the second conducting element in a manner that the second conducting element electrically bridges a section of the first conducting element.
  • the electrically bridged section of the first conducting element comprises an attenuation zone.
  • the cross-section of the attenuation zone is smaller than the cross-section of the two further sections of the first conducting element.
  • the first conducting element is formed as a tape, and the attenuation zone of the first conducting element has a recess being formed in a manner that a width of the attenuation zone of the first conducting element is smaller than a width of the further sections of the first conducting element.
  • the first conducting element is formed as a tape, and the attenuation zone of the first conducting element has a recess in a manner that a thickness of the attenuation zone of the first conducting element is smaller than a thickness of the further sections of the first conducting element.
  • the recess is V-shaped. This makes it possible to simply stamp or roll the recess into the first conducting element.
  • the recess has a semicircular shape. This makes it possible to simply stamp or roll the recess into the first conducting element and to simply remove the electrical coupling in the first conducting element if necessary.
  • the second conducting element is a wire element. This makes a high elasticity of the second conducting element possible.
  • the second conducting element comprises a plurality of wire elements. This has the advantage that a very high elasticity of the second conducting element is possible.
  • the rigid first conducting element of the electric conductor is electrically coupable to the actuator unit of the injector.
  • the invention is distinguished by a method for coupling an electrical connector according to one of the preceding claims to an actuator unit of an injector comprising the following steps: providing the electrical connector and the actuator unit of the injector, aligning the electrical connector relative to the actuator unit of the injector to obtain a defined position of the electrical connector relative to the actuator unit of the injector, coupling the first conducting element of the electric conductor of the electrical connector to the pin of the actuator unit to provide an electric coupling between the electrical connector and the actuator unit of the injector, and removing the attenuation zone of the first conducting element.
  • Figure 1 shows a part of an injector 20 with an actuator unit 28 and an electrical connector 30.
  • the actuator unit 28 comprises a housing 22 in which a piezo element 24 is arranged.
  • the actuator unit 28 may, however, also comprise another type of actuator, which is known to the person skilled in the art for that purpose. Such an actuator may be, for example, a solenoid.
  • the actuator unit 28 further comprises pins 26 for the supply of electrical energy to the actuator unit 28.
  • the piezo element 24 of the actuator unit 28 may change its axial length if it is supplied with electrical energy. By changing its length the actuator unit 28 may effect a force on a valve needle of the injector 20. Due to the exerted force the valve needle is able to move in axial direction to prevent or enable a fluid flow through the injector 20.
  • the electrical connector 30 has a connector body 32 in which an electric conductor 34 and a pin 38 are arranged.
  • the electric conductor 34 is electrically coupled with the pin 38 of the electrical connector 30 and with one of the pins 26 of the actuator unit 28.
  • a power supply can be coupled to the pin 38 to supply the actuator unit 28 with electrical energy.
  • the electric conductor 34 comprises a first conducting element 35 and a second conducting element 36.
  • the first conducting element 35 has a first rigidity.
  • the second conducting element 36 is elastically deformable and has a second rigidity which is smaller than the first rigidity of the first conducting element 35.
  • the first conducting element 35 and the second conducting element 36 are electrically coupled with each other in a manner that depending on the state of the first conducting element 35 either a parallel current flow through the first conducting element 35 and the second conducting element 36 is enabled or a current flow through the elastically deformable second conducting element 36 is possible.
  • the first conducting element 35 has a section 35c with an attenuation zone 35a and two further sections 35b.
  • the attenuation zone 35a is an area structurally weakened relative to the two further sections 35b.
  • the section 35c with the attenuation zone 35a of the first conducting element 35 is arranged between the two further sections 35b of the first conducting element 35.
  • the attenuation zone 35a of the first conducting element 35 has a recess 40. Due to the recess 40 the cross-section of the attenuation zone 35a of the first conducting element 35 is smaller than the cross-section of the two further sections 35b of the first conducting element 35.
  • the first conducting element 35 is formed as a tape.
  • the section 35c and in particular the attenuation zone 35a of the first conducting element 35 have a thickness T1.
  • the further sections 35b of the first conducting element 35 have a thickness T2.
  • the thickness T1 of the attenuation zone 35a of the first conducting element 35 is smaller than the thickness T2 of the further sections 35b of the first conducting element 35. Consequently, the cross-section of the attenuation zone 35a of the first conducting element 35 is smaller than the cross-section of the further sections 35b of the first conducting element 35.
  • the recess 40 of the first conducting element 35 is preferably produced by a rolling process during the production of the first conducting element 35.
  • the embodiment of the electrical connector 30 of figure 3 shows the first conducting element 35 with the section 35c comprising the attenuation zone 35a and the further sections 35b.
  • a width W1 of the attenuation zone 35a of the section 35c of the first conducting element 35 is smaller than a width W2 of the further sections 35b of the first conducting element 35.
  • the cross-section of the attenuation zone 35a of the first conducting element 35 is smaller than the cross-section of the further sections 35b of the first conducting element 35.
  • the second conducting element 36 has a first end 36a and a second end 36b.
  • the first end 36a of the second conducting element 36 is electrically coupled to one of the two further sections 35b of the first conducting element 35.
  • the second end 36b of the second conducting element 36 is electrically coupled to the other of the two further sections 35b of the first conducting element 35.
  • This electrical coupling enables to electrically bridge the section 35c and in particular the attenuation zone 35a of the first conducting element 35. In the case that the attenuation zone 35a of the first conducting element 35 is intact a parallel current flow through the first conducting element 35 and the second conducting element 36 to the pin 26 of the actuator unit 28 is possible.
  • the recess 40 may also be V-shaped as shown in figure 2 . This allows a simple stamping or rolling of the recess 40 into the first conducting element 35.
  • the first conducting element 35 of the electrical connector 30 may also have a recess 40 with a semicircular shape. By this the first conducting element 35 is formed in a way that the electrical connections between the further sections 35b of the first conducting element 35 can be removed very simply.
  • the second conducting element 36 is a wire. Wire elements enable a good elastic deformability of the second conducting element 36. Consequently, a high elasticity between the connector body 32 and the actuator unit 28 is available.
  • the second conducting element 36 comprises a plurality of wire elements which enable a very good elastic deformability of the second conducting element 36.
  • the coupling between the first conducting element 35 and the second conducting element 36 is carried out by a welding process as this is a very robust mechanical coupling process.
  • the coupling between the first conducting element 35 and the second conducting element 36 may also be achieved by brazing or a mechanical process such as pressing or clamping.
  • the electrical connector 30 and the actuator unit 28 of the injector 20 are provided.
  • the electrical connector 30 is aligned relative to the actuator unit 28 of the injector 20.
  • the first rigidity of the first conducting element 35 is high it is possible to obtain a well-defined position of the electrical connector 30 relative to the actuator unit 28 of the injector.
  • the first conducting element 35 of the electric conductor 34 of the electrical connector 30 is coupled to the pin 26 of the actuator unit 28. This coupling is preferably carried out by welding.
  • the coupling provides an electrical coupling between the electrical connector 30 and the actuator unit 24 of the injector.
  • the attenuation zone 35a of the first conducting element 35 is removed. This makes it possible to obtain an elastic coupling between the two further sections 35b of the first conducting element 35.
  • valve needle is enabled to move as described above and to exert a reaction force on the actuator unit 28. Due to this a movement of the actuator unit 28 relative to the electrical connector 30 can occur in a manner that forces are exerted on the first conducting element 35 and the second conducting element 36.
  • the second conducting element 36 bridges the attenuation zone 35a of the first conducting element 35 and a current flow through the second conducting element 36 is enabled.
  • the actuator unit 28 is supplied with electrical energy in a secure manner as the second rigidity of the second conducting element 36 is smaller than the first rigidity of the first conducting element 35 and the second conducting element 36 is elastically deformable thus enabling to transmit a low mechanical stress to the pins 26 of the actuator unit 28.

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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 (9)

  1. Elektrischer Verbinder (30) für einen Injektor (20), umfassend
    einen Verbinderkörper (32),
    einen Stift (38), der mechanisch an den Verbinderkörper (32) gekoppelt ist und elektrisch an eine Stromversorgung koppelbar ist, und
    einen elektrischen Leiter (34), der elektrisch an den Stift (38) gekoppelt ist und elektrisch an eine Betätigungseinheit (28) des Injektors (20) koppelbar ist,
    dadurch gekennzeichnet, dass
    der elektrische Verbinder (34) ein erstes leitendes Element (35) und ein zweites leitendes Element (36) umfasst, während das erste leitende Element (35) eine erste Steifigkeit aufweist, wobei das zweite leitende Element (36) elastisch deformierbar ist und eine zweite Steifigkeit aufweist, die geringer ist als die erste Steifigkeit des ersten leitenden Elements (35) und das erste leitende Element (35) ist elektrisch an das zweite leitende Element (36) in der Weise gekoppelt, dass das zweite leitende Element (36) einen Abschnitt (35c) des ersten leitenden Elements (35) elektrisch überbrückt und
    der elektrisch überbrückte Abschnitt (35c) des ersten leitenden Elements (35) umfasst einen verjüngten Bereich (35a), wobei der Querschnitt des verjüngten Bereichs (35a) kleiner ist als der Querschnitt der zwei weiteren Abschnitte (35b) des ersten leitenden Elements (35).
  2. Elektrischer Verbinder (30) gemäß Anspruch 1, während das erste leitende Element (35) als Band ausgebildet ist der verjüngte Bereich (35a) des ersten leitenden Elements (35) weist eine Aussparung (40) auf, die in einer Weise gebildet ist, dass eine Breite (W1) des verjüngten Bereichs (35a) des ersten leitenden Elements (35) kleiner ist als eine Breite (B2) der weiteren Abschnitte (35b) des ersten leitenden Elements (35).
  3. Elektrischer Verbinder (30) gemäß Anspruch 1, wobei das erste leitende Element (35) als ein Band ausgebildet ist und der verjüngte Bereich (35a) des ersten leitenden Elements (35) eine Aussparung (40) in einer Weise aufweist, sodass eine Dicke (T1) des verjüngten Bereichs (35a) des ersten leitenden Elements (35) kleiner ist als eine Dicke (T2) der weiteren Abschnitte (35b) des ersten leitenden Elements (35).
  4. Elektrischer Verbinder (30) gemäß Anspruch 2 oder 3, wobei die Aussparung (40) eine V-Form aufweist.
  5. Elektrischer Verbinder (30) gemäß Anspruch 2 oder 3, wobei die Aussparung (40) halbkreisförmig ist.
  6. Elektrischer Stecker (30) gemäß einem der vorhergehenden Ansprüche, während das zweite leitende Element (36) ein Kabelelement ist.
  7. Elektrischer Verbinder (30) gemäß einem der Ansprüche 1 - 5, während das zweite leitende Element (36) eine Mehrzahl an Kabelelementen umfasst.
  8. Elektrischer Verbinder (30) gemäß einem der vorhergehenden Ansprüche, während das erste leitende Element (35) des elektrischen Leiters (34) an die Betätigungseinheit (28) des Injektors (20) elektrisch koppelbar ist.
  9. Verfahren zum Koppeln eines elektrischen Verbinders (30) gemäß einem der vorhergehenden Ansprüche an eine Betätigungseinheit (28) eines Injektors (20), das die folgenden Schritte aufweist:
    Bereitstellen des elektrischen Verbinders (30) und der Betätigungseinheit (28) des Injektors (20),
    Ausrichten des elektrischen Verbinders (30) in Bezug auf die Betätigungseinheit (28) des Injektors (20), um eine definierte Position des elektrischen Verbinders (30) in Bezug auf die Betätigungseinheit (28) des Injektors (20) zu Erreichen,
    Koppeln des ersten leitenden Elements (35) des elektrischen Leiters (34) des elektrischen Verbinders (30) an den Stift (26) der Betätigungseinheit (28), um eine elektrische Kopplung zwischen dem elektrischen Verbinder (30) und der Betätigungseinheit (24) des Injektors (20) bereitzustellen und
    Entfernen des Verjüngungsbereichs (35a) des ersten leitenden Elements (35).
EP07003683A 2007-02-22 2007-02-22 Elektrischer Stecker und Verfahren zur Kopplung eines elektrischen Steckers an eine Antriebseinheit Active EP1961951B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE602007004567T DE602007004567D1 (de) 2007-02-22 2007-02-22 Elektrischer Stecker und Verfahren zur Kopplung eines elektrischen Steckers an eine Antriebseinheit
EP07003683A EP1961951B1 (de) 2007-02-22 2007-02-22 Elektrischer Stecker und Verfahren zur Kopplung eines elektrischen Steckers an eine Antriebseinheit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07003683A EP1961951B1 (de) 2007-02-22 2007-02-22 Elektrischer Stecker und Verfahren zur Kopplung eines elektrischen Steckers an eine Antriebseinheit

Publications (2)

Publication Number Publication Date
EP1961951A1 EP1961951A1 (de) 2008-08-27
EP1961951B1 true EP1961951B1 (de) 2010-01-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07003683A Active EP1961951B1 (de) 2007-02-22 2007-02-22 Elektrischer Stecker und Verfahren zur Kopplung eines elektrischen Steckers an eine Antriebseinheit

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EP (1) EP1961951B1 (de)
DE (1) DE602007004567D1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009029529A1 (de) * 2009-09-17 2011-03-24 Robert Bosch Gmbh Magnetventil mit direkt kontaktierter Steuereinheit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19630424A1 (de) * 1996-07-27 1998-01-29 Mannesmann Vdo Ag Hochstromkontakt
EP1445470A1 (de) 2003-01-24 2004-08-11 Siemens VDO Automotive S.p.A. Dosiervorrichtung mit Steckanschluss
DE102005016461A1 (de) * 2005-04-11 2006-10-12 Robert Bosch Gmbh Brennstoffeinspritzventil

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Publication number Publication date
DE602007004567D1 (de) 2010-03-18
EP1961951A1 (de) 2008-08-27

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