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EP0969575A1 - Spark plug - Google Patents

Spark plug Download PDF

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Publication number
EP0969575A1
EP0969575A1 EP99110651A EP99110651A EP0969575A1 EP 0969575 A1 EP0969575 A1 EP 0969575A1 EP 99110651 A EP99110651 A EP 99110651A EP 99110651 A EP99110651 A EP 99110651A EP 0969575 A1 EP0969575 A1 EP 0969575A1
Authority
EP
European Patent Office
Prior art keywords
spark plug
thread
insulator
plug according
internal combustion
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
EP99110651A
Other languages
German (de)
French (fr)
Other versions
EP0969575B1 (en
Inventor
Josef Holzmann
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0969575A1 publication Critical patent/EP0969575A1/en
Application granted granted Critical
Publication of EP0969575B1 publication Critical patent/EP0969575B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01T13/40—Sparking plugs structurally combined with other devices
    • H01T13/44—Sparking plugs structurally combined with other devices with transformers, e.g. for high-frequency ignition
    • 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
    • H01T13/08—Mounting, fixing or sealing of sparking plugs, e.g. in combustion chamber

Definitions

  • the invention relates to a spark plug with the features of the preamble of claim 1.
  • spark plugs are common.
  • the thread is in the area of the two electrodes and thus in the immediate vicinity of the combustion chamber of the internal combustion engine.
  • the insulator is located approximately at the other end of the spark plug.
  • To fasten the spark plug it is usually provided with a hexagon, which protrudes beyond the thread and is used to engage a tool with which the spark plug is turned into its operative position or removed from it can be.
  • the invention has for its object a spark plug of the aforementioned To create the kind that stands out just in terms of how to arrange the Characterized spark plug required diameter of small space.
  • Dislocating the thread offers a number of advantages.
  • On the one hand can be the one required for inserting the insulator and electrodes Diameter in the cylinder head according to the physical requirements be chosen, which are responsible for the proper functioning of the isolator and the Electrodes result.
  • the one provided for the engagement of the thread enlarged diameter is limited to the area in which the Thread is and sits at the other end of the spark plug and thus spatially removed from the two electrodes.
  • Applied to a combustion chamber with several This gives spark plugs favorable conditions, which on the one hand the necessary Space for the spark plugs and on the other hand for the fasteners concerns. This also allows two spark plugs for one cylinder with closely adjacent ones Arrange spark gaps.
  • Spark plug also allows the mechanical stop to be limited the axial movement of the spark plug during screwing in freely select a wide axial area of the spark plug. It can advantageously be provided in the region of the insulator and in accordance with can be designed as required. He can also add sealant, for example as a sealing seat or as a separate seal, which the Seal the combustion chamber from the outside.
  • a tool provided for turning the spark plug in and out can be on other end, d. H. attack in the area of the thread.
  • One way is to use the To provide the spark plug with a hexagon socket at this other end a suitable Allen key intervenes.
  • An ignition coil can also serve as a tool for fastening the spark plug is non-rotatably joined together to form a structural unit. It is then it is possible to insert the complete assembly into the cylinder block in a single operation to use the internal combustion engine or to remove it again. It it is then no longer necessary to use the spark plug separately and subsequently to assemble with the ignition coil to a structural unit. This results in significant manufacturing advantages. Fixing the entire assembly then takes place with the help of the thread.
  • the ignition coil is in the form of a rod Ignition coil 1 formed.
  • the spark plug 2 consists of an insulator 3 with a Upper part 3 'and a lower part 3' 'and a central electrode 4 and one Ground electrode 5.
  • the ground electrode can be of any design. In the drawing it is designed as a hook-shaped ground electrode, its electrical connection runs on the outer surface of the insulator 3.
  • a thread 6 is provided on the end facing away from the two electrodes 4 and 5, to attach the assembly consisting of parts 1 and 2 serves in a cylinder head of an internal combustion engine (not shown).
  • the thread protrudes beyond the diameter of the insulator 3 and engages in a corresponding one Internal thread in the cylinder head. It is readily apparent that the diameter of a bore required for arranging the spark plug 2 (not shown) in the cylinder head of the internal combustion engine in the area of the insulator 3 only determined by its outer dimensions and not by that of the thread 6 is. This results in a small space requirement for the spark plug within the cylinder head.

Landscapes

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

Abstract

The ignition plug has an isolator (3',3''), two electrodes (4,5) mounted on one end and a thread (6) for fixing in an engine block. The thread is arranged on the other end and protrudes beyond the isolator in cross-section. The isolator has a stop arrangement (8) that becomes effective when the plug rotates. An Independent claim is also included for an arrangement for implementing the method.

Description

Die Erfindung bezieht sich auf eine Zündkerze mit den Merkmalen des Oberbegriffs von Patentanspruch 1.The invention relates to a spark plug with the features of the preamble of claim 1.

Derartige Zündkerzen sind allgemein üblich. Das Gewinde befindet sich im Bereich der beiden Elektroden und damit in unmittelbarer Nähe des Brennraums der Brennkraftmaschine. Der Isolator ist in etwa am anderen Ende der Zündkerze angeordnet. Zum Befestigen der Zündkerze ist diese in der Regel mit einem Sechskant versehen, der über das Gewinde hinaussteht und zum Eingriff eines Werkzeugs dient, mit dem die Zündkerze in ihre Wirkstellung eingedreht bzw. aus dieser wieder herausgedreht werden kann.Such spark plugs are common. The thread is in the area of the two electrodes and thus in the immediate vicinity of the combustion chamber of the internal combustion engine. The insulator is located approximately at the other end of the spark plug. To fasten the spark plug, it is usually provided with a hexagon, which protrudes beyond the thread and is used to engage a tool with which the spark plug is turned into its operative position or removed from it can be.

Bedingt durch die Notwendigkeit, einerseits ein großes Drehmoment aufbringen zu können und andererseits für ein Werkzeug zugänglich zu sein, ergibt sich ein erhöhter Platzbedarf für den Sechskant, der eine lichte Öffnung im Zylinderkopf der Brennkraftmaschine erfordert, die deutlich größer als für das Gewinde bzw. den Isolator erforderlich ist. Insbesondere dann, wenn mehrere Zündkerzen pro Brennraum vorgesehen sind, ergeben sich dadurch erhebliche konstruktive Probleme, da einerseits der insgesamt zur Verfügung stehende Raum relativ gering ist und andererseits der Platzbedarf für die Anbringung der Zündkerzen und insbesondere für den Angriff des Werkzeugs erheblich ist.Due to the need to apply a large torque on the one hand ability and on the other hand to be accessible for a tool, there is an increased Space required for the hexagon, which has a clear opening in the cylinder head of the Internal combustion engine requires that much larger than for the thread or the Isolator is required. Especially when there are several spark plugs per combustion chamber are provided, there are considerable design problems, because on the one hand the total available space is relatively small and on the other hand the space required for the installation of the spark plugs and in particular for the attack of the tool is significant.

Der Erfindung liegt die Aufgabe zugrunde, eine Zündkerze der eingangs genannten Art zu schaffen, die sich durch einen gerade hinsichtlich des zum Anordnen der Zündkerze erforderlichen Durchmessers geringen Platzbedarfs auszeichnet.The invention has for its object a spark plug of the aforementioned To create the kind that stands out just in terms of how to arrange the Characterized spark plug required diameter of small space.

Die Erfindung löst diese Aufgabe durch die Merkmale des Patentanspruchs 1.The invention solves this problem by the features of claim 1.

Durch die Dislozierung des Gewindes ergeben sich eine Reihe von Vorteilen. Einerseits kann der für das Einsetzen des Isolators und der Elektroden erforderliche Durchmesser im Zylinderkopf entsprechend den physikalischen Notwendigkeiten gewählt werden, die sich für die ordnungsgemäße Funktion des Isolators und der Elektroden ergeben. Der für den Eingriff des Gewindes ggf. vorgesehene demgegenüber vergrößerte Durchmesser ist auf den Bereich beschränkt, in dem sich das Gewinde befindet und sitzt am anderen Ende der Zündkerze und damit räumlich entfernt von den beiden Elektroden. Angewandt auf einen Brennraum mit mehreren Zündkerzen ergeben sich dadurch günstige Verhältnisse, was einerseits den erforderlichen Bauraum für die Zündkerzen und andererseits für die Befestigungsmittel betrifft. Auch lassen sich so für einen Zylinder zwei Zündkerzen mit eng benachbarten Funkenstrecken anordnen.Dislocating the thread offers a number of advantages. On the one hand can be the one required for inserting the insulator and electrodes Diameter in the cylinder head according to the physical requirements be chosen, which are responsible for the proper functioning of the isolator and the Electrodes result. In contrast, the one provided for the engagement of the thread enlarged diameter is limited to the area in which the Thread is and sits at the other end of the spark plug and thus spatially removed from the two electrodes. Applied to a combustion chamber with several This gives spark plugs favorable conditions, which on the one hand the necessary Space for the spark plugs and on the other hand for the fasteners concerns. This also allows two spark plugs for one cylinder with closely adjacent ones Arrange spark gaps.

Eine in ihrer Bauform gegenüber konventionellen Zündkerzen geänderte erfindungsgemäße Zündkerze läßt es auch zu, den mechanischen Anschlag zum Begrenzen der axialen Bewegung der Zündkerze während des Einschraubens über einen weiten axialen Bereich der Zündkerze hinweg frei zu wählen. Er kann vorteilhafterweise im Bereich des Isolators vorgesehen sein und dabei entsprechend den jeweiligen Notwendigkeiten beliebig gestaltet sein. Er kann auch zusätzlich Dichtmittel, beispielsweise als Dichtsitz oder als separate Dichtung aufweisen, die den Brennraum nach außen hin abdichten.An inventive design changed compared to conventional spark plugs Spark plug also allows the mechanical stop to be limited the axial movement of the spark plug during screwing in freely select a wide axial area of the spark plug. It can advantageously be provided in the region of the insulator and in accordance with can be designed as required. He can also add sealant, for example as a sealing seat or as a separate seal, which the Seal the combustion chamber from the outside.

Ein für das Ein- und Ausdrehen der Zündkerze vorgesehenes Werkzeug kann am anderen Ende, d. h. im Bereich des Gewindes angreifen. Hierfür sind unterschiedliche mechanische Ausbildungen vorteilhaft. Eine Möglichkeit besteht darin, die Zündkerze an diesem anderen Ende mit einem Innensechskant zu versehen, in den ein geeigneter Inbusschlüssel eingreift.A tool provided for turning the spark plug in and out can be on other end, d. H. attack in the area of the thread. There are different for this mechanical training advantageous. One way is to use the To provide the spark plug with a hexagon socket at this other end a suitable Allen key intervenes.

Als Werkzeug zum Befestigen der Zündkerze kann auch eine Zündspule dienen, die mit der Zündkerze unverdrehbar zu einer Baueinheit zusammengefügt ist. Es ist dann möglich, die komplette Baueinheit in einem einzigen Arbeitsgang in den Zylinderblock der Brennkraftmaschine einzusetzen bzw. daraus wieder zu entfernen. Es ist dann nicht mehr erforderlich, die Zündkerze separat einzusetzen und nachträglich mit der Zündspule zu einer Baueinheit zusammenzufügen. Dadurch ergeben sich erhebliche fertigungstechnische Vorteile. Die Fixierung der gesamten Baueinheit erfolgt dann mit Hilfe des Gewindes.An ignition coil can also serve as a tool for fastening the spark plug is non-rotatably joined together to form a structural unit. It is then it is possible to insert the complete assembly into the cylinder block in a single operation to use the internal combustion engine or to remove it again. It it is then no longer necessary to use the spark plug separately and subsequently to assemble with the ignition coil to a structural unit. This results in significant manufacturing advantages. Fixing the entire assembly then takes place with the help of the thread.

Anhand der Zeichnung ist die Erfindung weiter erläutert.The invention is further explained on the basis of the drawing.

In der einzigen Figur ist im Schnitt eine aus der erfindungsgemäßen Zündkerze und einer Zündspule bestehende Baueinheit dargestellt. Die Zündspule ist als stabförmige Zündspule 1 ausgebildet. Die Zündkerze 2 besteht aus einem Isolator 3 mit einem Oberteil 3' und einem Unterteil 3'' sowie einer Mittelelektrode 4 sowie einer Masseelektrode 5. Die Masseelektrode kann beliebig gestaltet sein. In der Zeichnung ist sie als hakenförmige Masseelektrode ausgebildet, deren elektrische Verbindung an der Außenfläche des Isolators 3 verläuft.In the single figure is a section of the spark plug and an existing coil represented unit. The ignition coil is in the form of a rod Ignition coil 1 formed. The spark plug 2 consists of an insulator 3 with a Upper part 3 'and a lower part 3' 'and a central electrode 4 and one Ground electrode 5. The ground electrode can be of any design. In the drawing it is designed as a hook-shaped ground electrode, its electrical connection runs on the outer surface of the insulator 3.

An dem den beiden Elektroden 4 und 5 abgewandten Ende ist ein Gewinde 6 vorgesehen, das zum Befestigen der aus den Teilen 1 und 2 bestehenden Baueinheit in einem Zylinderkopf einer Brennkraftmaschine (nicht dargestellt) dient. Das Gewinde steht über den Durchmesser des Isolators 3 hervor und greift in ein entsprechendes Innengewinde im Zylinderkopf ein. Es ist ohne weiteres ersichtlich, daß der zum Anordnen der Zündkerze 2 erforderliche Durchmesser einer Bohrung (nicht dargestellt) im Zylinderkopf der Brennkraftmaschine im Bereich des Isolators 3 nur durch dessen Außenabmessungen und nicht durch die des Gewindes 6 bestimmt ist. Dadurch ergibt sich ein geringer Platzbedarf der Zündkerze innerhalb des Zylinderkopfs.A thread 6 is provided on the end facing away from the two electrodes 4 and 5, to attach the assembly consisting of parts 1 and 2 serves in a cylinder head of an internal combustion engine (not shown). The thread protrudes beyond the diameter of the insulator 3 and engages in a corresponding one Internal thread in the cylinder head. It is readily apparent that the diameter of a bore required for arranging the spark plug 2 (not shown) in the cylinder head of the internal combustion engine in the area of the insulator 3 only determined by its outer dimensions and not by that of the thread 6 is. This results in a small space requirement for the spark plug within the cylinder head.

Zum Eindrehen der Baueinheit in den Zylinderkopf wird mit einem geeigneten Werkzeug die Zündspule 1 gedreht. Dadurch wird das Gewinde 6 eingedreht, bis ein als Dichtsitz dienender Konus 8 zwischen den beiden Isolatorteilen 3' und 3'' auf einem entsprechend geformten Konus 7 innerhalb des Zylinderkopfs zum Anschlag kommt. Bei entsprechender Ausbildung des Konus 8 und des Gewindes 6 kann eine mechanische Fixierung der gesamten Baueinheit innerhalb des Zylinderkopfs erreicht werden. Entsprechend kann die Baueinheit aus ihrer Wirklage wieder entfernt und beispielsweise durch eine identisch geformte neue Baueinheit ersetzt werden.Use a suitable tool to screw the assembly into the cylinder head the ignition coil 1 rotated. This turns the thread 6 until a as Tight fit cone 8 between the two insulator parts 3 'and 3' 'on one appropriately shaped cone 7 comes to a stop within the cylinder head. With appropriate design of the cone 8 and the thread 6, a mechanical Fixation of the entire unit within the cylinder head achieved become. Accordingly, the structural unit can be removed from its operative position and For example, be replaced by an identically shaped new unit.

Claims (7)

Zündkerze für Brennkraftmaschinen, bestehend aus einem Isolator, zwei an einem Ende angeordneten Elektroden und einem Gewinde zum Befestigen in einem Motorblock, dadurch gekennzeichnet, daß das Gewinde (6) am anderen Ende angeordnet ist und im Querschnitt über den Isolator (3',3'') hinaussteht.Spark plug for internal combustion engines, consisting of an insulator, two electrodes arranged at one end and a thread for fastening in an engine block, characterized in that the thread (6) is arranged at the other end and has a cross section over the insulator (3 ', 3'') stands out. Zündkerze nach Anspruch 1, dadurch gekennzeichnet, daß der Isolator Anschlagmittel aufweist, die beim Eindrehen der Zündkerze wirksam sind.Spark plug according to Claim 1, characterized in that the insulator has stop means which are effective when the spark plug is screwed in. Zündkerze nach Anspruch 2, dadurch gekennzeichnet, daß die Anschlagmittel als Konus (8) ausgebildet sind.Spark plug according to Claim 2, characterized in that the stop means are designed as a cone (8). Zündkerze nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß im Bereich der Anschlagmittel Abdichtmittel für den Brennraum der Brennkraftmaschine vorgesehen sind.Spark plug according to Claim 2 or 3, characterized in that sealing means for the combustion chamber of the internal combustion engine are provided in the area of the stop means. Zündkerze nach Anspruch 4, dadurch gekennzeichnet, daß die Abdichtmittel als Dichtsitz ausgebildet sind.Spark plug according to Claim 4, characterized in that the sealing means are designed as a sealing seat. Zündkerze nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Zündkerze mit einer Zündspule eine Baueinheit bildet.Spark plug according to one of Claims 1 to 5, characterized in that the spark plug forms a structural unit with an ignition coil. Zündkerze nach Anspruch 6, dadurch gekennzeichnet, daß die Zündspule (1) unverdrehbar mit der Zündkerze (2) mechanisch miteinander verbunden ist.Spark plug according to Claim 6, characterized in that the ignition coil (1) is mechanically connected to the spark plug (2) in a non-rotatable manner.
EP99110651A 1998-07-01 1999-06-02 Spark plug Expired - Lifetime EP0969575B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19829443 1998-07-01
DE19829443A DE19829443A1 (en) 1998-07-01 1998-07-01 spark plug

Publications (2)

Publication Number Publication Date
EP0969575A1 true EP0969575A1 (en) 2000-01-05
EP0969575B1 EP0969575B1 (en) 2003-08-27

Family

ID=7872667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99110651A Expired - Lifetime EP0969575B1 (en) 1998-07-01 1999-06-02 Spark plug

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EP (1) EP0969575B1 (en)
DE (2) DE19829443A1 (en)
ES (1) ES2205637T3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1168543A3 (en) * 2000-06-30 2005-04-27 Ngk Spark Plug Co., Ltd Spark plug and mounting structure of the same
EP1662626A1 (en) * 2004-11-29 2006-05-31 Renault New mounting method of a spark plug and bobbin assembly using a transmission of the tightning couple through the bobbin housing
EP1351356A3 (en) * 2002-04-01 2006-06-07 Denso Corporation Ignition device for an internal combustion engine
WO2009013584A3 (en) * 2007-07-24 2009-03-19 Toyota Motor Co Ltd Ignition device for internal combustion engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10257995B4 (en) * 2002-04-09 2011-03-24 Robert Bosch Gmbh spark plug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1446447A (en) * 1965-06-10 1966-07-22 Simca Automobiles Sa Spark plug, especially for internal combustion engine
EP0458375A1 (en) * 1990-04-25 1991-11-27 General Motors Corporation Spark plug assembly for internal combustion engine
US5535726A (en) * 1995-05-05 1996-07-16 Cooper Industries, Inc. Automotive ignition coil assembly
US5697334A (en) * 1996-02-16 1997-12-16 Alliedsignal Inc. Spark plug with integral retainer nut

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE942304C (en) * 1954-04-14 1956-05-03 Gotthard Kinner Quick screw connection for spark plugs of internal combustion engines
DE3505988A1 (en) * 1985-02-21 1986-08-21 Robert Bosch Gmbh, 7000 Stuttgart Ignition device intended for an internal-combustion engine
US4903674A (en) * 1989-03-13 1990-02-27 General Motors Corporation Spark developing apparatus for internal combustion engines
DE4003021A1 (en) * 1990-02-02 1991-08-08 Didier Werke Ag IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1446447A (en) * 1965-06-10 1966-07-22 Simca Automobiles Sa Spark plug, especially for internal combustion engine
EP0458375A1 (en) * 1990-04-25 1991-11-27 General Motors Corporation Spark plug assembly for internal combustion engine
US5535726A (en) * 1995-05-05 1996-07-16 Cooper Industries, Inc. Automotive ignition coil assembly
US5697334A (en) * 1996-02-16 1997-12-16 Alliedsignal Inc. Spark plug with integral retainer nut

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1168543A3 (en) * 2000-06-30 2005-04-27 Ngk Spark Plug Co., Ltd Spark plug and mounting structure of the same
EP1351356A3 (en) * 2002-04-01 2006-06-07 Denso Corporation Ignition device for an internal combustion engine
EP1662626A1 (en) * 2004-11-29 2006-05-31 Renault New mounting method of a spark plug and bobbin assembly using a transmission of the tightning couple through the bobbin housing
FR2878658A1 (en) * 2004-11-29 2006-06-02 Renault Sas NEW METHOD FOR MOUNTING A CANDLE AND SPOOL ASSEMBLY USING A TORQUE TRANSMISSION BY THE SPOOL BODY
WO2009013584A3 (en) * 2007-07-24 2009-03-19 Toyota Motor Co Ltd Ignition device for internal combustion engine
US8267075B2 (en) 2007-07-24 2012-09-18 Toyota Jidosha Kabushiki Kaisha Ignition device for internal combustion engine

Also Published As

Publication number Publication date
DE19829443A1 (en) 2000-01-05
DE59906741D1 (en) 2003-10-02
ES2205637T3 (en) 2004-05-01
EP0969575B1 (en) 2003-08-27

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