EP2193575B1 - Elektrischer steckverbinder als kraftstoffinjektor-kontakt für schüttelfeste anwendungen - Google Patents

Elektrischer steckverbinder als kraftstoffinjektor-kontakt für schüttelfeste anwendungen Download PDF

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Publication number
EP2193575B1
EP2193575B1 EP08760943A EP08760943A EP2193575B1 EP 2193575 B1 EP2193575 B1 EP 2193575B1 EP 08760943 A EP08760943 A EP 08760943A EP 08760943 A EP08760943 A EP 08760943A EP 2193575 B1 EP2193575 B1 EP 2193575B1
Authority
EP
European Patent Office
Prior art keywords
contact
plug connector
electrical plug
inner part
contact inner
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.)
Ceased
Application number
EP08760943A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2193575A2 (de
Inventor
Refik Alp Tekoral
Peter Rehbein
Sabas Roman Tena
Michael Fleig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2193575A2 publication Critical patent/EP2193575A2/de
Application granted granted Critical
Publication of EP2193575B1 publication Critical patent/EP2193575B1/de
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/02—Alloys based on copper with tin as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
    • 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
    • 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
    • H01R13/02—Contact members
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/18—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with the spring member surrounding the socket
    • 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
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/111—Resilient sockets co-operating with pins having a circular transverse section

Definitions

  • the invention relates to an electrical connector according to the preamble of claim 1.
  • a conventional connector in the automotive sector for example, by the DE 94 19 446 U1 known.
  • Out DE 102 48 809 A1 is an electrical connector in the form of a vibration-stressed socket contact for producing an electrical connector in the automotive field known.
  • the electrical connector consists of a contact inner part and an over-spring.
  • the inner part itself comprises contact blades, which abut with a contact point on the counterpart, preferably a knife.
  • the inner contact part has at least three technological contact blades, each of the contact blades has at least one contact point for producing an electrical connector with a knife.
  • the free ends of the contact blades are based in the manufactured state of an electrical connector on support elements, which are formed as part of the over-spring.
  • Tin oxide is formed by fretting corrosion or the tin is rubbed.
  • Classical remedial measures against this contact wear caused by engine vibration or temperature cycling i. Fretting corrosion in tin-plated systems or abrasion in gold-plated or silver-plated systems are decoupling elements such as a metallic meander or looped copper ribbon, which are effective, but increase the contact cost and usually weaken the current carrying capacity (because of cross-sectional tapering) or in individual cases Increased contact normal force to improve the shaking, with the possible variation of the normal force is limited mostly by the plastic properties (yield point) of the Cu material of the contact springs (lamellae).
  • a plug contact with 6-finger contact (see. DE 10 2005 017 424 A1 ) provided in the control module, in which a pin of the nozzle module is inserted.
  • the nickel-plated and gold-plated 6-finger contact is pressed into a socket, which is provided for insulation (ie avoidance of short circuit) with a shrink tube and an insulating sleeve.
  • the electrically conductive connection is created starting from connecting bolts in the control module via the 6-finger contact, a solid conductor up to the magnet assembly and back.
  • the contact allows a reproducible mounting and dismounting of the control module and allows the actuation of the magnetic group in the nozzle module for injection.
  • the magnet assembly is fixed in the nozzle module and the socket in the control module.
  • the injector By adding a pressure booster in the fuel injector, the injector extends microscopically (about a few ⁇ m), pulling the pin out of the contact area. By injecting the pressure is released and the pin is pushed back into the contact area. Accumulated over the injection cycles and the running time, the plug contact covers a distance of one kilometer.
  • the gold surface of the known plug contact is abraded over the term down to the base material and in the base material. The gold surface has the task to protect the base material from oxidation and, due to its hardness, to reduce wear.
  • the purpose of the nickel layer is to prevent the diffusion of the less noble base material into the gold surface. If there is no gold surface, the risk increases that an oxide layer forms on the base material and the contact point (contact / solid conductor) becomes high-impedance. This can lead to the magnet assembly no longer being energized and therefore no injection possible. Due to the structural design of the fuel injector, the relative movement between solid conductor (pin) and plug contact can not be eliminated.
  • the service life is not limited by layer penetration (gold, tin, silver) or fretting corrosion, especially since no microcurrents are applied here.
  • German silver is a silver-white shiny alloy of 45-70% copper, 5-30% nickel, 8-45% zinc, possibly with admixtures of trace elements such as lead, tin or iron. It is characterized by special hardness and corrosion resistance because of the nickel content.
  • normal forces can be set in the range 2 to 16 N, ie approximately one order of magnitude higher than in the case of DE 10 2005 017 424 A1 known plug contact with 1N.
  • Increased insertion forces play no role due to industrial assembly instead of manual assembly with plugs.
  • a compact plug contact construction with a small length and a small diameter is also possible, so that, for example, a pin with a diameter of 1 mm can be contacted.
  • high contact forces contact normal forces
  • the electrical disadvantage (relatively poor conductivity) can be neglected, because usually only very short-term currents below 10 amps, clocked in the range of ⁇ s (to ms) occur, which only means very small RMS currents / equivalent currents of less than 1 ampere. Therefore, the disadvantageous conductivity does not lead to thermal overheating and thermal damage.
  • the additional voltage drop in the range of a few mOhm (about 20 mOhm theoretically) is negligible in relation to the voltage drops of the overall system and / or wiring harness, since the length of the inner contact part and the over-spring of the connector according to the invention only a few mm (about 4-9 mm ) is big.
  • the connector according to the invention offers the possibility of allowing a wear of ⁇ 0.2 mm per contact area without an oxide layer forming. Since there is no layer, the failure criterion "layer abrasion" is eliminated. By increasing the contact normal force per contact area by a factor of 10, it is possible to reduce the micro-movements and thus reduce the wear. In addition, the quality requirements can be met because with such high normal force extraneous layer thicknesses can be pushed through to keep the electrical contact resistance small and stable.
  • the connector according to the invention can also be used under diesel engine conditions, ie in engine oil, engine oil / water and engine oil / diesel / water environments.
  • the in Fig. 1 shown electrical connector 1 is designed as a female contact or circular contact and is used for electrically contacting a pin . 2
  • the electrical connector 1 comprises a contact inner part 3 for electrically contacting the pin 2, a surrounding the inner contact part 3 over spring 4 and a metal bushing 5.
  • the contact inner part 3 is made of nickel silver, preferably N18 (Wieland trade name), and in the illustrated embodiment as a longitudinally slotted round Sleeve formed, which has a plurality of inwardly directed contact fingers (lamellae) 6 and may be formed for example by a rolled-sheet metal part made of nickel silver.
  • the inner contact part 3 thus has no surface coating, in particular no gold, silver or tin coating.
  • the contact inner part 3 is clamped in the over-spring 4, which is made of stainless spring steel (eg 1.4310 with strength 1500 MPA).
  • the over-spring 4 in turn is mounted in the metal bushing 5, for example made of brass and clamped therein, wherein the clamping force is greater than the insertion force of the pin 2.
  • the metal bushing 5 is electrically connected via the over-spring 4 with the contact inner part 3 and in turn attached to the stripped end of an electrical line 7 .
  • the metal bush 5 is surrounded by an insulating sleeve 8 , and the electrical line 7 is covered with a shrink tube 9 .
  • the sheet thickness or wall thickness Due to the sheet thickness or wall thickness, the length of the contact fingers 6 and the width of the longitudinal slots, the contact pressure and the stiffness of the inner contact part 3 can be adjusted.
  • the over-spring 4 By superposition with the over-spring 4, the normal force of the contact fingers 6 can be massively increased and trimmed in the target area to compensate for both, both manufacturing tolerances and wear due to wear.
  • a round pin made of nickel silver with 1 mm diameter in the opening 10 of the metal bushing 5 and inserted between the contact fingers 6 of the contact inner part 3, against the return action of the over-spring. 4
  • Fig. 2 shows a fuel injector 20 with a nozzle module 21 and a control module 22, which the in Fig. 1 has shown connector 1.
  • the fuel injection is controlled by means of a solenoid valve (not shown) which is part of a magnet assembly 23 of the nozzle module 21.
  • the magnet assembly 23 has a solid conductor 24 which preferably extends to the control module 22 and also has nickel silver, the end of which, embodied as a pin 2, is plugged into the plug connector 1 in the control module 22.
  • the connector 1 offers the possibility of allowing a wear of ⁇ 0.2 mm per contact area without forming an oxide layer. Since there is no oxide layer, the failure criterion layer abrasion is eliminated.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
EP08760943A 2007-06-28 2008-06-12 Elektrischer steckverbinder als kraftstoffinjektor-kontakt für schüttelfeste anwendungen Ceased EP2193575B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007029968A DE102007029968A1 (de) 2007-06-28 2007-06-28 Elektrischer Steckverbinder als Kraftstoffinjektor-Kontakt für schüttelfeste Anwendungen
PCT/EP2008/057403 WO2009000666A2 (de) 2007-06-28 2008-06-12 Elektrischer steckverbinder als kraftstoffinjektor-kontakt für schüttelfeste anwendungen

Publications (2)

Publication Number Publication Date
EP2193575A2 EP2193575A2 (de) 2010-06-09
EP2193575B1 true EP2193575B1 (de) 2011-01-12

Family

ID=39971026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08760943A Ceased EP2193575B1 (de) 2007-06-28 2008-06-12 Elektrischer steckverbinder als kraftstoffinjektor-kontakt für schüttelfeste anwendungen

Country Status (7)

Country Link
US (1) US20100258651A1 (ja)
EP (1) EP2193575B1 (ja)
JP (1) JP4956670B2 (ja)
CN (1) CN101689719B (ja)
DE (2) DE102007029968A1 (ja)
RU (1) RU2010102140A (ja)
WO (1) WO2009000666A2 (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7837519B2 (en) 2009-02-24 2010-11-23 Tyco Electronics Corporation Electrical bushing with helper spring to apply force to contact spring
US7942683B2 (en) 2009-02-24 2011-05-17 Tyco Electronics Corporation Electrical bushing with radial interposer spring
US7942682B2 (en) 2009-02-24 2011-05-17 Tyco Electronics Corporation Electrical connector with slider component for fault condition connection
DE102009057944B3 (de) * 2009-12-11 2010-12-30 Harting Electronics Gmbh & Co. Kg Kontaktbuchse zur Aufnahme eines Kontaktstiftes
DE102010040335A1 (de) 2010-09-07 2012-03-08 Robert Bosch Gmbh Elektrischer Steckverbinder für einen Kraftstoffinjektor
DE102011088793A1 (de) 2011-12-16 2013-06-20 Tyco Electronics Amp Gmbh Elektrischer Steckverbinder mit mikrostrukturiertem Kontaktelement
EP2713040B1 (en) * 2012-09-26 2017-06-07 Delphi International Operations Luxembourg S.à r.l. Electrical connector
CN103746205A (zh) * 2013-12-12 2014-04-23 四川永贵科技有限公司 具有单支点簧片结构的印制板插座
CN104901027A (zh) * 2015-06-12 2015-09-09 桂林市啄木鸟医疗器械有限公司 一种夹紧结构及其弹片
GB2555404B (en) * 2016-10-24 2019-04-17 Delphi Tech Ip Ltd Positioning feature of a stator assembly of a fuel injector
CN106450966A (zh) * 2016-12-05 2017-02-22 四川永贵科技有限公司 带有微动开关联动机构的复合插孔组件
DE102017204692A1 (de) * 2017-03-21 2018-09-27 Robert Bosch Gmbh Kraftstoffinjektor
DE202018104958U1 (de) * 2018-08-30 2018-09-12 Harting Electric Gmbh & Co. Kg Steckverbinder mit Komponenten aus verbessertem Material

Family Cites Families (22)

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GB796964A (en) * 1955-12-05 1958-06-25 Gen Electric Co Ltd Improvements in or relating to electrical socket connectors
FR85856E (fr) * 1963-06-24 1965-10-29 Electronique Et D Automatique Perfectionnements aux connecteurs électriques
US3924922A (en) * 1971-04-26 1975-12-09 Herbert A Decenzo Constrictor biased electrical pin and socket type connector
JPS6029374A (ja) * 1983-07-29 1985-02-14 Nissan Motor Co Ltd ストラットタワ−取付部の結合構造
JPS6029374U (ja) * 1983-08-01 1985-02-27 株式会社　中立ハトメ 高周波用同軸コネクタ
DE3342742C2 (de) * 1983-11-25 1985-10-24 Otto Dunkel GmbH Fabrik für elektrotechnische Geräte, 8260 Mühldorf Verfahren zur Herstellung von Kontaktfederbuchsen
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DE10224683A1 (de) 2002-06-04 2003-12-18 Bosch Gmbh Robert Geschweißter Meanderkontakt
DE10248809A1 (de) * 2002-10-19 2004-04-29 Robert Bosch Gmbh Elektrischer Steckverbinder in der Ausgestaltung eines Buchsenkontakts mit spezieller Lamellengestaltung
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Also Published As

Publication number Publication date
JP2010531530A (ja) 2010-09-24
JP4956670B2 (ja) 2012-06-20
DE502008002338D1 (de) 2011-02-24
DE102007029968A1 (de) 2009-01-08
CN101689719B (zh) 2014-03-05
WO2009000666A2 (de) 2008-12-31
US20100258651A1 (en) 2010-10-14
RU2010102140A (ru) 2011-08-10
EP2193575A2 (de) 2010-06-09
WO2009000666A3 (de) 2009-02-19
CN101689719A (zh) 2010-03-31

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