EP0855771B1 - Rail d'allumage à connections étanches, mobiles - Google Patents

Rail d'allumage à connections étanches, mobiles Download PDF

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Publication number
EP0855771B1
EP0855771B1 EP98100499A EP98100499A EP0855771B1 EP 0855771 B1 EP0855771 B1 EP 0855771B1 EP 98100499 A EP98100499 A EP 98100499A EP 98100499 A EP98100499 A EP 98100499A EP 0855771 B1 EP0855771 B1 EP 0855771B1
Authority
EP
European Patent Office
Prior art keywords
spark plug
ignition
spark
plug tube
connector
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.)
Expired - Lifetime
Application number
EP98100499A
Other languages
German (de)
English (en)
Other versions
EP0855771A1 (fr
Inventor
Werner Flierl
Herbert Laufer
Wolfgang Weltin
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.)
Aumovio Microelectronic GmbH
Original Assignee
Temic Telefunken Microelectronic 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 Temic Telefunken Microelectronic GmbH filed Critical Temic Telefunken Microelectronic GmbH
Publication of EP0855771A1 publication Critical patent/EP0855771A1/fr
Application granted granted Critical
Publication of EP0855771B1 publication Critical patent/EP0855771B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • 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

  • the invention relates to an ignition rail for contacting an ignition device with the spark plugs of an internal combustion engine.
  • the spark plugs are not contacted with the ignition current via individual spark plugs with a spark plug connector, but all spark plugs of a cylinder head are contacted together.
  • the spark rail consists of a spark plug tube carrier, to which spark plug tubes are attached with spark plug connectors. With this construction, the spark rail is removed for maintenance of the spark plugs, making all spark plugs of a cylinder head accessible.
  • Parts of the ignition device can be arranged in a cavity of the spark plug tube carrier, as a result of which particularly short connections between the spark plug and the ignition device are achieved.
  • An ignition rail is known, for example, from US Pat. No. 4,903,675, in which the spark plug tubes and spark plug connectors are designed as a common part.
  • the spark plug tubes each contain a primary coil through which the ignition voltage is transmitted contactlessly to the specially designed spark plugs containing a secondary coil.
  • the problem with using a spark rail is inevitable tolerances in the distance between the spark plugs, which must be compensated for by the spark rail.
  • the ignition rail must be protected against the ingress of moisture.
  • a connection system for the electrical connection of a spark plug according to the single coil concept is proposed in US Pat. No. 5,577,921.
  • a separate ignition coil is arranged in the head part of each spark plug tube.
  • a spark plug connector is screwed, which is designed for conventional spark plugs. Protection against moisture penetration is ensured by 0 - rings.
  • the disadvantage of the plug device is the complicated spark plug connector and the cylinder head specially designed for this plug device, which allows only very small manufacturing tolerances.
  • an ignition device according to the single coil concept is also described, in which the ignition coil for a spark plug is arranged in a separate housing next to the spark plug tube with the spark plug connector.
  • the spark plug tubes with the spark plug plugs can be removed individually from the spark plugs without having to dismantle the spark rail, which is designed as a housing comprising the spark plug tubes and the spark plug plugs.
  • the spark plug tubes with the spark plug connectors are fastened to the ignition rail by means of a plug-in device which is designed, for example, as a bayonet catch.
  • the disadvantage of this ignition device lies in its complex and cost-intensive structure and in the extremely high space requirement.
  • the invention has for its object a simple structure for a Spark rail from a spark plug tube carrier with spark plug tubes and Specify spark plug connectors for conventional spark plugs at which the spark plug tubes and the spark plug tube carrier via a plug device are connected to each other so that manufacturing tolerances are balanced can be and the ignition rail from entering Moisture is protected.
  • the spark plug tubes being held in the spark plug tube carrier by at least one first O-ring and at least one second O-ring.
  • the spark plug tube carrier has a number of cutouts corresponding to the number of spark plugs to be contacted.
  • the upper parts of the spark plug tubes are each designed as plugs for a recess in the spark plug tube carrier.
  • exactly one first O-ring and exactly one second O-ring are provided.
  • a groove is worked out in the cutouts of the spark plug tube carrier, whereby the plug of the spark plug tube engages when it is connected to the spark plug tube carrier.
  • the first O-ring is thus able to absorb axial forces and also provides a movable connection that compensates for component tolerances and seals against the ingress of moisture.
  • the second O-ring a groove on the plug of the spark plug tube, below the first O-ring to work out. This allows the second O-ring to absorb radial forces, which act on the spark plug tubes via the spark plug tube carrier, the connection remains flexible and additional component tolerances can be compensated. In addition, a through the second O-ring Protection against the ingress of moisture is formed.
  • cutouts are provided in a further development of the invention of the spark plug tube carrier and the plugs of the spark plug tubes to form a bayonet lock.
  • An advantageous development of the invention provides for each Spark plug tube the ignition coil for the respective spark plug according to the single coil concept to accommodate.
  • the ignition rail to accommodate a circuit board, the Ignition rail is sealed against the ingress of moisture.
  • the Circuit board can be the electrical leads for the ignition coils in the spark plug tubes and, for example, a power supply unit and parts of the control electronics the ignition device.
  • the spark plug connector is provided to be provided with a device which clamps the Spark plug connector on the spark plug causes the clamping force so is set that the spark plug connector easily from the spark plugs of the Internal combustion engine can be deducted because of the structure of the ignition rail prevents the detachment of a spark plug connector.
  • a last development of the invention provides for the ignition rail at the outer ends with a lifting mechanism, through which the spark rail evenly, without jamming, from the spark plugs can be deducted. During the operation of the internal combustion engine the lifting mechanism locks and stabilizes the ignition rail.
  • the inventive construction of the ignition rail with the first and second O-ring becomes the everyday suitability and reliability of the Ignition rail significantly improved
  • the ignition rail according to the invention is based on a Embodiment shown in connection with three figures and explained.
  • FIG. 3 shows an overall representation of the ignition rail in a three-dimensional representation.
  • each spark plug of an internal combustion engine is supplied with the high voltage required for an ignition process by its own ignition coil.
  • the ignition coil can be arranged near the spark plug directly after the spark plug connector ZS in the spark plug tube ZR. With such an arrangement, it makes sense to combine the spark plug tubes ZR, which are located next to one another, with a common ignition rail, through which all the necessary electrical leads can also be guided.
  • the single coil concept in connection with an ignition rail has proven itself as particularly useful if the ignition device with a highly developed Engine management is combined. This can be, for example Ion current measurement for the detection of engine knock, or an energy control the spark during an ignition process.
  • the Property of the single coil concept used that only in the spark plug tubes ZR high-voltage components are arranged while in the Ignition rail only low-voltage components are available. Thereby can in the spark plug tube support ZT electronic parts of the ignition device be arranged, with the cable lengths and data paths considerably shorten, and thereby the structure of the igniter very much can be made compact.
  • the 12-cylinder in-line engine from Mercedes-Benz has one of these Engine management.
  • the longitudinally installed motor is powered by two Spark plugs are fired per cylinder, creating symmetry on the left and the right side of the cylinder block one ignition rail each Spark plug tube holder ZT with 12 spark plug tubes ZR and 12 spark plug connectors ZS is arranged.
  • To accommodate a circuit board are the Spark plug tube support ZT hollow and each with a cover A provided.
  • the sealing of the underside of the spark plug tube carrier ZT with the cutouts for the plug of the spark plug tubes ZR must meet further requirements.
  • the connection In addition to the tightness against the ingress of moisture, the connection must be movable, since the spark plugs are arranged in the engine block with a finite accuracy.
  • a spark rail cannot be pulled off the spark plugs in an absolutely vertical manner, as a result of which the spark plug tubes ZR in the spark plug tube carrier ZT must have a little play in order not to be damaged when the spark plugs are removed.
  • Figure 1 shows the representation of a section through the plug of a spark plug tube.
  • the upper parts of the spark plug tubes ZR, which face the spark plug tube carrier ZT, are formed into a plug which has a first O-ring EO and a second O-ring ZO.
  • the first O-ring EO at the outer end of the plug sits on a cylindrical part of the plug, which widens at least by the thickness of the O-ring, so that the first O-ring EO widens when the spark plug tube ZR is connected to the spark plug tube carrier ZT can't move.
  • the edge of the cutouts of the spark plug tube carrier ZT is provided with a groove for the first O-ring EO, into which the first O-ring EO slips after connection.
  • the cutouts of the spark plug tube supports ZT and the plugs of the spark plug tubes ZR are designed so that they each form a bayonet catch BV.
  • the bayonet catch is shown in a three-dimensional view
  • Figure 2a shows the upper part of the bayonet catch, which is attached in the recess in the spark plug tube carrier
  • Figure 2b shows how the lower part of the bayonet catch is worked out on the plug of the spark plug tube.
  • the first O-ring EO is pressed lightly into the groove, which results in limited mobility and tolerance compensation, and in which the first O-ring EO can compensate axial forces that act on the spark plug tube ZR, i.e. tension or pressure.
  • the second O-ring ZO is located below the first O-ring EO in a groove in the spark plug tube ZR. After connecting the spark plug tube ZR to the spark plug tube carrier ZT, the second O-ring ZO can be supported against the wall of the recess of the spark plug tube carrier ZT when radial forces acting on the spark plug tube ZR occur, as a result of which the spark plug tube ZR is slightly movable relative to the spark plug tube carrier ZT and the tightness of the ignition rail against the ingress of moisture is guaranteed.
  • the contact pins KS which the ignition coil inside the spark plug tube ZR connect to the circuit board in the spark plug tube support ZT, are so in the spark plug tube ZR arranged that after connecting the spark plug tubes ZR with the spark plug tube support ZT the circuit board with the Contact openings for the contact pins KS on the contact pins KS Ignition coils can be put on.
  • the spark plug connector ZS which form the lower part of the spark plug tube ZR, are detachably attached to the spark plug tube ZR to prevent them from showing signs of wear easy to replace.
  • the spark plug connector ZS are provided with a device that a Clamping the spark plug connector ZS on the spark plug causes.
  • a Clamping force that the spark plug connector ZS for a secure fit on the Have to apply spark plugs compared to conventional spark plug connectors significantly reduced, as an unintentional loosening of the spark plug connector ZS, for example due to engine vibrations, due to the rigid structure of the Ignition rails are not possible.
  • a trigger mechanism at the ends of the ignition rail to be provided with a lever, when actuated metal pins are pressed against the engine block of the internal combustion engine, whereby all spark plug connectors of a spark rail are evenly spaced from the Spark plugs are removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Spark Plugs (AREA)

Claims (8)

  1. Rail d'allumage pour contacter un dispositif d'allumage de moteur à combustion avec des bougies d'allumage, comportant un support à tubes de bougies (ZT), qui présente un nombre d'évidements correspondant au nombre de bougies à contacter, et des tubes de bougies (ZR) dont la partie supérieure est réalisée sous forme d'une fiche pour un des évidements du support à tubes de bougies (ZT) et dont la partie inférieure présente une cosse de bougie respective (ZS) pour établir une liaison avec une bougie, caractérisé en ce que chaque tube de bougie (ZR) est maintenu sur la fiche par au moins un premier joint torique (EO),
    qui est agencé à l'extrémité extérieure de la fiche du tube de bougie,
    qui est réalisé de manière à encaisser des forces axiales,
    et qui, lors de la liaison de la fiche du tube de bougie (ZR) avec un des évidements du support à tubes de bougies (ZT), remplit une gorge qui est agencée au bord des évidements du support à tubes de bougies (ZT),
    et en ce que chaque tube de bougie (ZR) est maintenu par au moins un second joint torique qui est agencé dans une gorge du support à tubes de bougies (ZT).
  2. Rail d'allumage selon la revendication 1, caractérisé en ce que ledit au moins un second joint torique (ZO) est agencé dans une gorge sur la fiche du tube de bougie (ZR) en dessous dudit au moins premier joint torique (EO) pour encaisser des forces radiales et pour protéger vis-à-vis de la pénétration de l'humidité.
  3. Rail d'allumage selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce qu'un évidement du support à tube de bougie (ZT) et une fiche du tube de bougie (ZR) forment respectivement une fermeture à baïonnette (BV).
  4. Rail d'allumage selon l'une des revendications 1 à 3, caractérisé en ce que dans les tubes à bougie d'allumage (ZR) sont agencées des bobines d'allumage respectives.
  5. Rail d'allumage selon l'une des revendications 1 à 4, caractérisé en ce que les fiches de bougies d'allumage (ZS) sont interchangeables.
  6. Rail d'allumage selon l'une des revendications 1 à 5, caractérisé en ce que le rail d'allumage est conçu pour recevoir une plaque conductrice, et en ce que le rail d'allumage est étanché à l'encontre de la pénétration d'humidité.
  7. Rail d'allumage selon l'une des revendications 1 à 6, caractérisé dans ce que la fiche de bougie d'allumage (ZS) est pourvue de moyens pour effectuer un serrage de la fiche de bougie d'allumage (ZS) sur la bougie d'allumage, la force de serrage étant ainsi réglée que les fiches de bougies d'allumage (ZS) peuvent être aisément extraites des bougies d'allumage du moteur à combustion interne.
  8. Rail d'allumage selon l'une des revendications 1 à 7, caractérisé en ce que le rail d'allumage présente aux extrémités externes un mécanisme de levage au moyen duquel le rail d'allumage peut être extrait depuis les bougies d'allumage.
EP98100499A 1997-01-25 1998-01-14 Rail d'allumage à connections étanches, mobiles Expired - Lifetime EP0855771B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702696A DE19702696A1 (de) 1997-01-25 1997-01-25 Zündschiene mit abgedichteten, beweglichen Verbindungen
DE19702696 1997-01-25

Publications (2)

Publication Number Publication Date
EP0855771A1 EP0855771A1 (fr) 1998-07-29
EP0855771B1 true EP0855771B1 (fr) 1999-07-28

Family

ID=7818368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98100499A Expired - Lifetime EP0855771B1 (fr) 1997-01-25 1998-01-14 Rail d'allumage à connections étanches, mobiles

Country Status (4)

Country Link
US (1) US5979422A (fr)
EP (1) EP0855771B1 (fr)
JP (1) JPH10223350A (fr)
DE (2) DE19702696A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29812536U1 (de) * 1998-07-14 1999-11-25 Robert Bosch Gmbh, 70469 Stuttgart Zündvorrichtung für eine Mehrzylinder-Brennkraftmaschine
US7208119B1 (en) * 2000-03-01 2007-04-24 Roche Diagnostics Operations, Inc. Hospital meter system
DE19933335C2 (de) * 1999-07-16 2002-11-14 Volkswagen Ag Elektronisches Zündsystem für Brennkraftmaschinen
US6769637B2 (en) * 2000-12-04 2004-08-03 Autonetworks Technologies, Ltd. Injector module, injector electric block body, injector main bodies to be used for the same, and ignition coil device module
US6758200B2 (en) 2002-08-06 2004-07-06 Delphi Technologies, Inc. Ignition coil driver chip on printed circuit board for plughole coil housing
US6622711B1 (en) * 2002-09-12 2003-09-23 Delphi Technologies, Inc. Ignition coil cassette assembly
US7509951B1 (en) * 2007-10-29 2009-03-31 Ford Global Technologies, Llc Internal combustion engine cover with electronic module
JP5315185B2 (ja) * 2009-09-16 2013-10-16 本田技研工業株式会社 内燃機関の点火装置の取り付け構造

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4903675A (en) * 1989-03-13 1990-02-27 General Motors Corporation Internal combustion engine ignition apparatus having a primary winding module
DE3920080C2 (de) * 1989-06-20 1994-08-04 Audi Ag Zündvorrichtung für eine Brennkraftmaschine
DE9002123U1 (de) * 1990-02-22 1990-04-26 BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg Zündkabelleiste
IT1240539B (it) * 1990-08-08 1993-12-17 Magneti Marelli Spa Motore a combustione interna ad accensione comandata e dispositivo di interconnessione fra una bobina di accensione ed una candela per tale motore.
IT1246068B (it) * 1991-05-03 1994-11-07 Magneti Marelli Spa Gruppo di accensione a bobine di tipo plug-top per un motore a combustione interna
US5577921A (en) * 1995-06-16 1996-11-26 Caterpillar Inc. Electrical connector system for electrically connecting a voltage source to a spark plug terminal

Also Published As

Publication number Publication date
EP0855771A1 (fr) 1998-07-29
DE59800015D1 (de) 1999-09-02
US5979422A (en) 1999-11-09
JPH10223350A (ja) 1998-08-21
DE19702696A1 (de) 1998-08-06

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