EP2234225B1 - Zündkerzenverbinder - Google Patents

Zündkerzenverbinder Download PDF

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Publication number
EP2234225B1
EP2234225B1 EP09156347A EP09156347A EP2234225B1 EP 2234225 B1 EP2234225 B1 EP 2234225B1 EP 09156347 A EP09156347 A EP 09156347A EP 09156347 A EP09156347 A EP 09156347A EP 2234225 B1 EP2234225 B1 EP 2234225B1
Authority
EP
European Patent Office
Prior art keywords
spark plug
connector
boot
spring
set forth
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
EP09156347A
Other languages
English (en)
French (fr)
Other versions
EP2234225A1 (de
Inventor
Fréderic Baron
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP09156347A priority Critical patent/EP2234225B1/de
Priority to AT09156347T priority patent/ATE544208T1/de
Publication of EP2234225A1 publication Critical patent/EP2234225A1/de
Application granted granted Critical
Publication of EP2234225B1 publication Critical patent/EP2234225B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs

Definitions

  • This invention relates to a spark plug connector for an internal combustion engine.
  • Spark plugs are known to have a male terminal protruding from a ceramic portion.
  • a high voltage ignition wire terminal is press fitted and thereby sits onto the male terminal of the spark plug.
  • This high voltage electrical connection is surrounded by an elastomeric, electrically insulating boot which is integral to the ignition wire protruding from the spark plug and fits snuggly around the upper ceramic portion of the spark plug.
  • the boot also assures that the high voltage electrical connection remains clean and free of moisture thereby providing a strong and efficient spark within the combustion chamber.
  • the spark plug In today's complex engines, the spark plug is often positioned into a deep well typically surrounded by an electrically grounded and heat dissipating engine block. After insertion into the well the spark plug is threadably engaged to the engine block.
  • the object of the present invention is to resolve these problems by proposing a connector simple in design, cheaper and more compact. More specifically, the invention proposes according to claim 1 a spark plug electrical connector for connecting an ignition coil to a spark plug of an engine in which a spark plug is located within a well presenting a bend at angle X, the connector comprising an electrically insulating tubular boot having a spark plug open end and a coil open end and inside of which is an electrically conductive means connecting the coil to the spark plug and a strengthening member extending substantially from the spark plug open end to the coil open end, and characterised in that the connector makes one bend to form an angle X between the spark plug open end (36) and the coil open end, this in order to accommodate the bend of the well; the strengthening member is bent to also form said angle X.
  • Figure 1 represents a portion of an engine block 10 with a spark plug 12 an ignition coil 14 and a spark plug connector 16.
  • the spark plug 12 is threaded in the engine block 10 at the bottom of a well 18.
  • the spark plug 12 as an electrodes end, located in the combustion chamber of the engine, and a ceramic portion from which is protruding a male terminal 20 emerging at the bottom 22 of the well 18.
  • the ignition coil 14 is fixed (fixation mean not represented) onto the engine block 10 at the top end 24 of the well 18.
  • the well 16 is bent with the bottom end 22 extending along a lower axis A1, and the top end 24 extending along an upper axis A2.
  • the lower axis A1 and the upper axis A2 make an angle X.
  • the angle X is preferably between 160° and 180°, but could go to 135°.
  • the spark plug connector 16 extends inside the well 18 from the spark plug 12, where it is connected onto it, to the ignition coil 14, whereto it is also connected.
  • the connector 16 is bent by the angle X, as is the well 18.
  • FIG. 2 details the elements of the spark plug connector 16.
  • the connector 16 comprises a tubular boot 30 having an internal surface 32 and an external surface 34, the boot 30 having an annular circular section.
  • the boot 30 extends, along axis A1, from a spark plug end 36, to a coil end 38 along axis A2, the boot 30 being open at both ends 36, 38.
  • the tubular boot 30 is bent by the angle X.
  • the boot 30 is made of one single piece.
  • the internal surface 32 of the boot 30 is provided with a shoulder 42 restricting, toward the spark plug end 36, the internal section of the boot 30.
  • the internal surface 32 of the boot 30 is provided with an annular groove 44 where an internal elastic ring 46 is located.
  • the shoulder 42 and the elastic ring 46 are retaining means for the internal elements of the connector 16.
  • the external surface 34 of the boot 30 is provided with a set of radially extending discs forming lips 48 that, as shown on figure 1 , are in sealing contact with the well 18 so that, no dust nor other particles can accumulate around the spark plug 12.
  • the boot 30 is made of soft and electrically isolating material such as silicone.
  • the connector 16 comprises a first conical spring 50 with large end on abutment against the shoulder 42 and small end oriented upward.
  • the connector 16 comprises a second conical spring 52 with large end on abutment against the elastic ring 44 and small end oriented toward downward.
  • a rod 54 having a spark plug extremity 56 extending along axis A1 and a coil extremity 58 extending along axis A2.
  • the rod 54 is bent as per the angle X.
  • the rod 54 is metallic and constitutes a strengthening member for the connector 16.
  • the rod 54 extremities 56, 58 are integrally provided with flat heads 60 62 forming plates.
  • the spark plug extremity 56 is provided with the first plate 60 radially extending from axis A1.
  • the coil extremity 58 is integrally provided with the second plate 62 radially extending from axis A2.
  • the first conical spring 50 is on abutment against the first plate 60 by its small end.
  • the second conical spring 52 is on abutment against the second plate 62 by its small end.
  • the two conical springs 50, 52, the two plates 60, 62 and the rod 54 are of electrically conductive material.
  • the surfaces of the electrically conductive elements are smooth without any sharp angle.
  • the distance from the shoulder 42 to the internal grove 44 is slightly smaller than the cumulated free length of the two conical springs 50, 52 added to the thickness of the two plates 60, 62 and the length of the rod 54. Therefore when assembled the two conical springs 50, 52, the two plates 60, 62 and the rod 54 are in slight compression ensuring a tight contact between the various elements and, when plugged onto the spark plug 12 and onto the ignition coil 14, providing electrical continuity from the spark plug 12 to the ignition coil 14.
  • the manufacturing and assembly process of the connector 16 comprise the following steps:
  • the rod 54 is manufactured and equipped with the integral heads 60, 62 forming plates.
  • the rod 54 is bent to make the angle X.
  • the first spring 50 is inserted inside the tubular boot 30 and positioned on abutment against the shoulder 42.
  • the boot 30 is partially straightened and the rod 54 is inserted inside and positioned so that the first plate 60 comes in contact against the first spring 50.
  • the second spring 52 is positioned inside with small end in contact against the second plate 62.
  • the assembly is slightly axially compressed so that the elastic ring 46 can be positioned inside the groove 44.

Landscapes

  • Ignition Installations For Internal Combustion Engines (AREA)
  • Spark Plugs (AREA)

Claims (11)

  1. Elektrischer Zündkerzenverbinder (16) zum Verbinden einer Zündspule (14) mit einer Zündkerze (12), insbesondere zur Verwendung mit einem Motor (10), in dem sich eine Zündkerze (12) in einem tiefen Schacht (18) befindet, der eine Biegung mit einem Winkel X zeigt, während sich die Zündspule (14) außerhalb des Schachts (18) befindet, wobei der Verbinder (16) eine elektrisch isolierende rohrförmige Manschette (30) aufweist mit einem offenen Zündkerzenende (36) und einem offenen Spulenende (38) und innerhalb derer ein elektrisch leitfähiges Mittel (50, 60, 54, 62, 52) vorgesehen ist zum Verbinden der Spule (14) mit der Zündkerze (12), wobei der Verbinder (16) ein Versteifungselement (54) aufweist, das in der Manschette (30) positioniert ist, wobei sich das Versteifungselement (54) im Wesentlichen von dem offenen Zündkerzenende (36) zu dem offenen Spulenende (38) erstreckt, dadurch gekennzeichnet, dass der Verbinder (16) eine Biegung macht, um einen Winkel X zu bilden, zwischen dem offenen Zündkerzenende (36) und dem offenen Spulenende (38), wobei das Versteifungselement (54) gebogen ist, um ebenfalls den Winkel X zu bilden.
  2. Verbinder (16) gemäß Anspruch 1, dadurch gekennzeichnet, dass das Versteifungselement (54) ein Element des elektrisch leitfähigen Mittels (50, 60, 54, 62, 52) ist.
  3. Verbinder (16) gemäß einem vorhergehenden Anspruch, dadurch gekennzeichnet, dass das Versteifungselement (54) eine längliche Stange (54) ist mit einem ersten Ende (56), das der Zündkerze (12) zugewandt ist, und einem zweiten Ende (58), das der Spule (14) zugewandt ist.
  4. Verbinder (16) gemäß einem vorhergehenden Anspruch, dadurch gekennzeichnet, dass das elektrisch leitfähige Mittel (50, 60, 54, 62, 52) eine erste Feder (50) aufweist, die mit der Zündkerze (12) verbunden ist.
  5. Verbinder (16) gemäß einem vorhergehenden Anspruch, dadurch gekennzeichnet, dass das elektrisch leitfähige Mittel (50, 60, 54, 62, 52) eine zweite Feder (52) aufweist, die mit der Zündspule (14) verbunden ist.
  6. Verbinder (16) gemäß den Ansprüchen 3 und 4 in Kombination mit einem/jedem anderen Anspruch, dadurch gekennzeichnet, dass die Stange (54) mit einer ersten Platte (60) an ihrem ersten Ende (56) vorgesehen ist, wobei die erste Platte (60) im Wesentlichen flach und orthogonal zu der Stange (54) ist, wobei die erste Platte (60) in Kontakt mit der ersten Feder (50) ist.
  7. Verbinder (16) gemäß den Ansprüchen 3 und 5 in Kombination mit einem/jedem anderen Anspruch, dadurch gekennzeichnet, dass die Stange (54) mit einer zweiten Platte (62) an ihrem zweiten Ende (58) vorgesehen ist, wobei die zweite Platte (62) im Wesentlichen flach und orthogonal zu der Stange (54) ist, wobei die zweite Platte (62) in Kontakt mit der zweiten Feder (52) ist.
  8. Verbinder (16) gemäß den Ansprüchen 6 und 7, dadurch gekennzeichnet, dass das elektrisch leitfähige Mittel (50, 60, 54, 62, 52), das die erste Feder (50), die erste Platte (60), die Stange (54), die zweite Platte (62) und die zweite Feder (52) aufweist, in der Manschette (30) durch ein Haltemittel (42, 44, 46) gehalten wird.
  9. Verbinder (16) gemäß Anspruch 8, dadurch gekennzeichnet, dass das Haltemittel (42, 44, 46) eine interne Schulter (42) aufweist, die mit der Manschette (30) vorgesehen ist und sich in der Nähe des ersten offenen Endes (36) befindet und gegen die die erste Feder (50) anliegt, und einen elastischen Ring (46), der in einer Rille (44) positioniert ist, der sich in der Manschette (30) in der Nähe des zweiten offenen Endes (38) befindet und gegen den die zweite Feder (52) anliegt.
  10. Verbinder (16) gemäß einem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Manschette (30) aus einem weichen Material besteht, wie Silikon.
  11. Verbinder (16) gemäß Anspruch 10, dadurch gekennzeichnet, dass alle Oberflächen des elektrisch leitfähigen Mittels (50, 60, 54, 62, 52) glatt sind ohne einen scharfen Winkel, so dass während der Fertigung, wenn das elektrisch leitfähige Mittel (50, 60, 54, 62, 52) in die Manschette (30) eingefügt wird, und während eines Betriebs die Manschette (30) nicht beschädigt wird.
EP09156347A 2009-03-26 2009-03-26 Zündkerzenverbinder Active EP2234225B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09156347A EP2234225B1 (de) 2009-03-26 2009-03-26 Zündkerzenverbinder
AT09156347T ATE544208T1 (de) 2009-03-26 2009-03-26 Zündkerzenverbinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09156347A EP2234225B1 (de) 2009-03-26 2009-03-26 Zündkerzenverbinder

Publications (2)

Publication Number Publication Date
EP2234225A1 EP2234225A1 (de) 2010-09-29
EP2234225B1 true EP2234225B1 (de) 2012-02-01

Family

ID=40909885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09156347A Active EP2234225B1 (de) 2009-03-26 2009-03-26 Zündkerzenverbinder

Country Status (2)

Country Link
EP (1) EP2234225B1 (de)
AT (1) ATE544208T1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5093375B2 (ja) * 2011-03-16 2012-12-12 三菱電機株式会社 点火コイル装置
SE541409C2 (en) * 2017-06-19 2019-09-24 Sem Ab Spark plug extension
CN115013216B (zh) * 2022-07-14 2024-01-02 东风汽车集团股份有限公司 一种点燃压燃发动机的点火组件、发动机及车辆

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4797115A (en) * 1987-11-13 1989-01-10 Prestolite Wire Corporation Angled boot for angled spark plug cable terminals
JP4267042B2 (ja) * 2007-05-01 2009-05-27 三菱電機株式会社 内燃機関用点火コイル装置

Also Published As

Publication number Publication date
ATE544208T1 (de) 2012-02-15
EP2234225A1 (de) 2010-09-29

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