EP0565655B1 - Ignition coil for ignition systems of internal combustion engines - Google Patents
Ignition coil for ignition systems of internal combustion engines Download PDFInfo
- Publication number
- EP0565655B1 EP0565655B1 EP92919354A EP92919354A EP0565655B1 EP 0565655 B1 EP0565655 B1 EP 0565655B1 EP 92919354 A EP92919354 A EP 92919354A EP 92919354 A EP92919354 A EP 92919354A EP 0565655 B1 EP0565655 B1 EP 0565655B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spark plug
- ignition coil
- plug connector
- niche
- centring sleeve
- 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
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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
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- 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
- F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
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- 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
Definitions
- the invention relates to an ignition coil according to the preamble of claim 1.
- ignition coils which have a sleeve-shaped secondary connecting part which projects from the housing of the ignition coil and which leads to the high voltage to the spark plug, consisting of a connecting dome and a spark plug connector which is thus captively coupled.
- the coupling point between the connector dome and the spark plug connector is designed in such a way that the spark plug connector can be pivoted to a small extent with respect to the connector dome which projects rigidly from the housing of the ignition coil. This pivoting serves to compensate for tolerances between the ignition coil, which is attached directly to the cylinder head, and the spark plug, which is fixed in a niche in the cylinder head of the internal combustion engine.
- the plug niche has a larger inner diameter than the outer diameter of the spark plug or the spark plug connector connected to the ignition coil, it can happen in rare cases that when the ignition coil is installed on the cylinder head, the spark plug connector does not slide onto the spark plug, but in the space between the wall of the candle niche and the spark plug. This incorrect assembly is generally not recognized during the initial operation of the internal combustion engine, since the spark plug is not properly contacted due to the high voltage supply of the ignition coil Arcing receives a reduced but sufficient ignition voltage.
- EP-A-0 445 557 also discloses an ignition coil with a sleeve-shaped secondary connection part, consisting of a connection dome and a spark plug connector that is captively coupled therewith. Claim 1 is based on this document.
- connection dome In order to facilitate and make the assembly of the connection dome on the spark plug accommodated in the candle niche safer, the connection dome has centering means on the outside in the form of ring beads. These centering means are inseparable integral parts of the spark plug connector, which can only be used for an installation geometry in a plug niche. With variable installation conditions, the ignition coils must each be equipped with different, individually adapted spark plug connectors, which prevents cost-effective production.
- the ignition coil according to the invention with the characterizing features of claim 1 has the advantage that the centering means, which is designed as a centering sleeve, is applied as a separate component on the spark plug connector.
- the single figure shows the ignition coil in partial section with which the spark plug contacts.
- An ignition coil 11 for ignition systems of internal combustion engines for motor vehicles is fixed in the single figure in a manner not shown on the cylinder head 12 of an internal combustion engine.
- the ignition coil 11 is largely covered by a cup-shaped housing 13 made of glass fiber reinforced thermoplastic.
- this includes a core made of magnetically conductive material, one leg of which carries a primary winding and a secondary winding.
- a primary connection part 14 is attached to the housing 13, via which the ignition coil 11 is connected to the voltage source of the motor vehicle.
- a sleeve-shaped secondary connection portion 17 protrudes perpendicular to a filling side 16 of the housing 13. This forms the high-voltage output of the ignition coil 11 and is contact means to a spark plug 18 which is mounted in a plug niche 20 in the cylinder head 12.
- the secondary connection part 17 is anchored in the ignition coil 11; this is completely poured out with an electrically insulating potting compound made of epoxy resin, which, when cured, closes the pot-shaped housing 13 on the filling side 16 and firmly encloses the secondary connecting part 17 at the point of its exit from the filling side 16.
- the secondary connecting part 17 is constructed in two pieces with a connecting dome 19 rigidly fixed in the ignition coil 11 and a spark plug connector 21 coupled to it.
- the connecting dome 19 consists of a metallic pin 22, which is almost completely covered with an insulator 23 made of thermosetting plastic. Only the end region of the pin 22 pointing away from the ignition coil 11 is uninsulated.
- the pin 22 here has an axial slot 24 and on the circumference an outer annular groove 26 which has a passage to the blind hole 24 on one side and receives a locking ring 27 which projects through the passage into the blind hole 24 on one side.
- a suitably shaped metallic counterpart of the spark plug connector 21, which is no longer shown, can be inserted into the blind hole 24, and this latches permanently with the locking ring 27.
- This electrically conductive coupling point between the connecting dome 19 and the spark plug connector 21 enables the spark plug connector 21 to pivot slightly with respect to the connecting dome 19 rigidly connected to the ignition coil 11.
- the connecting dome 19 and thus also the end region of the pin 22 is encased in an insulating manner by a plug 28 made of silicone rubber of the spark plug connector 21 when the spark plug connector 21 is coupled to the connecting dome 19.
- the grommet 28, which surrounds the spark plug connector 21 with all of its generally known and not detailed contact parts for the connection dome 19 and for the spark plug 18, is sleeve-shaped and has a cylindrically stepped outer shape, with a shoulder 29 facing the ignition coil 11, one separates first section 31 from a second section 32 of larger diameter.
- the first section 31 has an annular bead 33, eccentrically in the longitudinal direction, facing the larger section 32.
- the annular bead 33 forms a latching means for a centering sleeve 34 which can be pushed over the grommet 28.
- the centering sleeve 34 has a slightly conical outer shape and closes at the end with a small and on the other hand with a large diameter.
- the inner shape of the centering sleeve 34 contains two cylindrical regions which are essentially designed as stepped inner cylinders and are connected by a conical inner shoulder 36, a first region 37 which closes at the end face with the large diameter and a second region 38 which is opposite the first region 37 has a larger inner diameter and ends at the end with the small diameter.
- the centering sleeve 34 with the second area 38 is pushed over the first section 31 of the spout 28.
- the annular bead 33 of the grommet 28 temporarily reaches the first region 37 of the centering sleeve 34, which is smaller in diameter by a press play than that of the annular bead 33, until the inner shoulder 36 of the centering sleeve 34 comes to lie on the shoulder 29 of the grommet 28 of the annular bead 33 on the end face behind the first region 37 and the centering sleeve 34 springs open interlocked on the spout 28.
- the centering sleeves 34 thus fixed on the grommet 28 are additionally fixed thereon with a force fit by the first section 31 of the grommet 28 being pushed onto the connecting dome 19 until the coupling between the pin 22 and the spark plug connector 21 has taken place.
- the spout 28 experiences in its first section 31 a widening in diameter due to the outer dimension of the insulator 29, from which the annular bead 33 is also gripped, so that the centering sleeve 34 can no longer be detached from the spout 28.
- the ignition coil 11 thus supplemented with the centering sleeve 34 can now be mounted on the cylinder head 12 in such a way that the spark plug connector 21 always slides centrally onto the spark plug 18, since the centering sleeve 34, with its outer shape adapted to the internal geometry of the plug recess 20, taking into account a play of motion, the spark plug connector 21 leads centrally in the candle niche 20.
- the centering sleeve 34 is provided on its outer jacket with a plurality of longitudinal grooves 39.
- the centering sleeve 34 can also be used in a multi-spark ignition coil that supplies a plurality of spark plugs 18 with ignition energy become.
- This multi-spark ignition coil has, in addition to the previously described secondary connection part 17, further secondary connection parts which are generally flexibly connected to the multi-spark ignition coil via ignition cables.
- the assembly of these secondary connection parts 17 on the spark plugs is particularly susceptible to faults and can also be carried out without errors by inexperienced assembly personnel through the use of centering sleeves 34.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
Die Erfindung geht aus von einer Zündspule nach der Gattung des Anspruchs 1.The invention relates to an ignition coil according to the preamble of claim 1.
Allgemein bekannt sind Zündspulen, die ein aus dem Gehäuse der Zündspule ragendes, die Hochspannung zu der Zündkerze führendes, hülsenförmiges Sekundäranschlußteil aufweisen, bestehend aus einem Anschlußdom und einem damit unverlierbar gekoppelten Zündkerzenstecker.Generally known are ignition coils which have a sleeve-shaped secondary connecting part which projects from the housing of the ignition coil and which leads to the high voltage to the spark plug, consisting of a connecting dome and a spark plug connector which is thus captively coupled.
Die Kopplungsstelle zwischen Anschlußdom und Zündkerzenstecker ist so ausgestaltet, daß der Zündkerzenstecker gegenüber dem starr aus dem Gehäuse der Zündspule ragenden Anschlußdom in geringem Maße schwenkbar ist. Diese Verschwenkung dient dem Toleranzausgleich zwischen der Zündspule, die direkt auf dem Zylinderkopf befestigt ist und der Zündkerze, die in einer Kerzennische des Zylinderkopfes der Brennrkraftmaschine fixiert ist.The coupling point between the connector dome and the spark plug connector is designed in such a way that the spark plug connector can be pivoted to a small extent with respect to the connector dome which projects rigidly from the housing of the ignition coil. This pivoting serves to compensate for tolerances between the ignition coil, which is attached directly to the cylinder head, and the spark plug, which is fixed in a niche in the cylinder head of the internal combustion engine.
Da die Kerzennische aus Montagegründen einen größeren Innendurchmesser aufweist, als der Außendurchmesser der Zündkerze bzw. der mit der Zündspule verbundene Zündkerzenstecker, kann es in seltenen Fällen vorkommen, daß bei der Montage der Zündspule auf dem Zylinderkopf der Zündkerzenstecker nicht auf die Zündkerze aufgleitet, sondern in den Zwischenraum zwischen der Wandung der Kerzennische und der Zündkerze gerät. Diese Fehlmontage wird in der Regel beim anfänglichen Betrieb der Brennkraftmaschine nicht erkannt, da bei dem hohen Spannungsangebot der Zündspule die nicht ordnungsgemäß kontaktierte Zündkerze durch Überschläge eine zwar geminderte, aber ausreichende Zündspannung erhält.Since the plug niche has a larger inner diameter than the outer diameter of the spark plug or the spark plug connector connected to the ignition coil, it can happen in rare cases that when the ignition coil is installed on the cylinder head, the spark plug connector does not slide onto the spark plug, but in the space between the wall of the candle niche and the spark plug. This incorrect assembly is generally not recognized during the initial operation of the internal combustion engine, since the spark plug is not properly contacted due to the high voltage supply of the ignition coil Arcing receives a reduced but sufficient ignition voltage.
Die so übermittelte Spannung reicht jedoch bei schlechten Betriebsbedingungen infolge Witterungs- und Alterungseinflüssen nicht mehr zur Erzeugung eines Zündfunkens an der fehlerkontaktierten Zündkerze aus. Dies führt zu Zündaussetzern und zum Ausstoß von unverbranntem Kraftstoff aus der Brennkraftmaschine, was verhindert werden muß.However, in poor operating conditions due to weather and aging influences, the voltage thus transmitted is no longer sufficient to generate an ignition spark on the fault-contacted spark plug. This leads to misfires and the discharge of unburned fuel from the internal combustion engine, which must be prevented.
Durch die EP-A-0 445 557 ist ebenfalls eine Zündspule mit einem hülsenförmigen Sekundäranschlußteil, bestehend aus einem Anschlußdom und einem damit unverlierbar gekoppelten Zündkerzenstecker bekannt. Anspruch 1 geht von dieser Druckschrift aus.EP-A-0 445 557 also discloses an ignition coil with a sleeve-shaped secondary connection part, consisting of a connection dome and a spark plug connector that is captively coupled therewith. Claim 1 is based on this document.
Um die Montage des Anschlußdoms auf der in der Kerzennische untergebrachten Zündkerze zu erleichtern und sicherer zu machen, weist der Anschlußdom außenseitig Zentriermittel in Form von Ringwülsten auf. Diese Zentriermittel sind untrennbare integrale Bestandteile des Zündkerzensteckers, der nur für eine Einbaugeometrie in einer Kerzennische brauchbar ist. Damit müssen bei variablen Einbauverhältnissen die Zündspulen jeweils mit unterschiedlichen, individuell angepaßten Zündkerzensteckern ausgerüstet werden, was einer kostengünstigen Fertigung entgegensteht.In order to facilitate and make the assembly of the connection dome on the spark plug accommodated in the candle niche safer, the connection dome has centering means on the outside in the form of ring beads. These centering means are inseparable integral parts of the spark plug connector, which can only be used for an installation geometry in a plug niche. With variable installation conditions, the ignition coils must each be equipped with different, individually adapted spark plug connectors, which prevents cost-effective production.
Die erfindungsgemäße Zündspule mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß das Zentriermittel, das als eine Zentrierhülse ausgebildet ist, als separates Bauteil auf dem Zündkerzenstecker aufgebracht wird.The ignition coil according to the invention with the characterizing features of claim 1 has the advantage that the centering means, which is designed as a centering sleeve, is applied as a separate component on the spark plug connector.
Durch den Einsatz von Zentrierhülsen ist auch für ungeübtes Montagepersonal die Montage der Anschlußteile fehlerfrei durchzuführen.Thanks to the use of centering sleeves, even inexperienced assembly personnel can assemble the connection parts without any errors.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben. Nach den Ansprüchen 2 und 3 erreicht man eine verliersichere Anordnung der Zentrierhülse auf dem Zündkerzenstecker und nach Anspruch 6 eine befriedigende Belüftung der Kerzennische.Advantageous developments of the invention are described in the subclaims. According to claims 2 and 3, a captive arrangement of the centering sleeve on the spark plug connector is achieved and, according to claim 6, satisfactory ventilation of the candle niche.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der Figurenbeschreibung näher erläutert.An embodiment of the invention is shown in the drawing and explained in more detail in the description of the figures.
Die einzige Figur zeigt die Zündspule im Teilschnitt, mit der Zündkerze kontaktiert.The single figure shows the ignition coil in partial section with which the spark plug contacts.
Eine Zündspule 11 für Zündanlagen von Brennkraftmaschinen für Kraftfahrzeuge ist in der einzigen Figur in nicht näher dargestellter Art am Zylinderkopf 12 einer Brennkraftmaschine festgelegt.An
Die Zündspule 11 ist in weiten Bereichen umfaßt von einem topfförmigen Gehäuse 13 aus glasfaserverstärktem thermoplastischem Kunststoff. Dieses beinhaltet in bekannter und nicht dargestellter Art einen Kern aus magnetisch leitfähigem Material, dessen einer Schenkel eine Primärwicklung und eine Sekundärwicklung trägt.The
Am Gehäuse 13 ist ein Primäranschlußteil 14 angebracht, über das die Zündspule 11 mit der Spannungsquelle des Kraftfahrzeugs verbunden ist.A primary connection part 14 is attached to the
Des weiteren steht lotrecht zu einer Einfüllseite 16 des Gehäuses 13 ein hülsenförmiges Sekundäranschlußanteil 17 ab. Dieses bildet den Hochspannungsausgang der Zündspule 11 und ist Kontaktmittel zu einer Zündkerze 18, die in einer Kerzennische 20 im Zylinderkopf 12 montiert ist.Furthermore, a sleeve-shaped
Das Sekundäranschlußteil 17 ist in der Zündspule 11 verankert; diese ist mit einer aus Epoxidharz bestehenden elektrisch isolierenden Vergußmasse vollständig ausgegossen, die ausgehärtet an der Einfüllseite 16 das topfförmigen Gehäuses 13 abschließt und das Sekundäranschlußteil 17 an dessen Austrittsstelle aus der Einfüllseite 16 fest umschließt.The
Das Sekundäranschlußteil 17 ist bei diesem Ausführungsbeispiel zweistückig aufgebaut mit einem starr in der Zündspule 11 fixierten Anschlußdom 19 und einem damit gekoppelten Zündkerzenstecker 21.In this exemplary embodiment, the secondary connecting
Der Anschlußdom 19 besteht aus einem metallischen Stift 22, der nahezu über die volle Länge mit einem aus duroplastischem Kunststoff bestehenden Isolator 23 umhüllt ist. Nur der von der Zündspule 11 wegweisende Endbereich des Stiftes 22 ist unisoliert. Der Stift 22 weist hier ein axiales Sachloch 24 und am Umfang eine Außenringnut 26 auf, die auf einer Seite einen Durchtritt zum Sackloch 24 hat und einen Sicherungsring 27 aufnimmt, der einseitig durch den Durchtritt in das Sackloch 24 ragt. In das Sackloch 24 ist ein nicht mehr dargestelltes passend geformtes metallisches Gegenstück des Zündkerzensteckers 21 einfügbar, das dabei mit dem Sicherungsring 27 bleibend verrastet. Diese elektrisch leitende Kopplungsstelle zwischen dem Anschlußdom 19 und dem Zündkerzenstecker 21 ermöglicht dem Zündkerzenstecker 21 ein geringes Verschwenken gegenüber dem starr mit der Zündspule 11 verbundenen Anschlußdom 19.The connecting
Der Anschlußdom 19 und damit auch der Endbereich des Stiftes 22 wird bei an den Anschlußdom 19 gekoppelten Zündkerzenstecker 21 von einer aus Silikongummi bestehenden Tülle 28 des Zündkerzensteckers 21 isolierend umhüllt. Die Tülle 28, die den Zündkerzenstecker 21 mit allen seinen allgemein bekannten und nicht näher detaillierten Kontaktteilen für den Anschlußdom 19 und für die Zündkerze 18 umhüllt, ist hülsenförmig und weist eine zylindrisch gestufte Außenform auf, mit einer zur Zündspule 11 weisenden Schulter 29, die einen ersten Abschnitt 31 von einem zweiten, durchmessergrößeren Abschnitt 32 trennt.The connecting
Der erste Abschnitt 31 weist, im Längsverlauf außermittig, dem durchmessergrößeren Abschnitt 32 zugewandt, einen Ringwulst 33 auf. Der Ringwulst 33 bildet ein Rastmittel für eine über die Tülle 28 schiebbare Zentrierhülse 34.The
Die Zentrierhülse 34 hat eine leicht konische Außenform und schließt stirnseitig einerseits mit einem kleinen und andererseits mit einem großen Durchmesser ab.The centering
Die Innenform der Zentrierhülse 34 enthält zwei im wesentlichen als gestufte Innenzylinder ausgebildete, durch einen konische Innenschulter 36 verbundene zylindrische Bereiche auf, einem ersten Bereich 37, der an der Stirnseite mit dem großen Durchmesser abschließt und einem zweiten Bereich 38, der gegenüber dem ersten Bereich 37 einen größeren Innendurchmesser aufweist und der an der Stirnseite mit dem kleinen Durchmesser abschließt.The inner shape of the
Bei der Montage der Zentrierhülse 34 auf der Tülle 28 wird die Zentrierhülse 34 mit dem zweiten Bereich 38 voraus über den ersten Abschnitt 31 der Tülle 28 geschoben. Dabei gelangt der Ringwulst 33 der Tülle 28 vorübergehend in den ersten Bereich 37 der Zentrierhülse 34, der im Durchmesser um ein Preßspiel kleiner ist als der des Ringwulstes 33, bis mit dem Aufeinandertreffen der Innenschulter 36 der Zentrierhülse 34 auf die Schulter 29 der Tülle 28 der Ringwulst 33 stirnseitig hinter dem ersten Bereich 37 zu liegen kommt und auffedernd die Zentrierhülse 34 an der Tülle 28 formschlüssig verriegelt.When mounting the
Die so an der Tülle 28 festgelegte Zentrierhülsen 34 wird auf dieser zusätzlich mit Kraftschluß fixiert, indem der erste Abschnitt 31 der Tülle 28 soweit auf dem Anschlußdom 19 aufgeschoben wird, bis die Kopplung zwischen dem Stift 22 und dem Zündkerzenstecker 21 erfolgt ist. Dabei erfährt die Tülle 28 in ihrem ersten Abschnitt 31 durch das Außenmaß des Isolators 29 eine Durchmesseraufweitung, von der auch der Ringwulst 33 erfaßt ist, so daß die Zentrierhülse 34 nicht mehr von der Tülle 28 lösbar ist.The
Die so mit der Zentrierhülse 34 ergänzte Zündspule 11 ist nun derart auf dem Zylinderkopf 12 montierbar, daß der Zündkerzenstecker 21 stets zentrisch auf die Zündkerze 18 aufgleitet, da die Zentrierhülse 34 mit ihrer an die Innengeometrie der Kerzennische 20 unter Berücksichtigung eines Bewegungsspieles angepaßten Außenform den Zündkerzenstecker 21 in der Kerzennische 20 zentrisch führt.The
Zur Entlüftung der Kerzennische 20 ist die Zentrierhülse 34 an ihrem Außenmantel mit mehreren Längsnuten 39 versehen.To vent the
Damit ist eine sichere und funktionsgerechte Montage der Zündspule 11 auf dem Zylinderkopf 12 auch bei ungünstigen Montageverhältnissen gewährleistet.This ensures safe and functional installation of the
Alternativ kann die Zentrierhülse 34 auch bei einer Mehrfunkenzündspule, die mehrere Zündkerzen 18 mit Zündenergie versorgt, eingesetzt werden. Diese Mehrfunkenzündspule weist neben dem zuvor beschriebenen Sekundäranschlußteil 17 weitere Sekundäranschlußteile auf, die in der Regel über Zündkabel flexibel mit der Mehrfunkenzündspule verbunden sind. Die Montage dieser Sekundäranschlußteile 17 auf die Zündkerzen ist in besonderem Maße störanfällig und ist durch den Einsatz von Zentrierhülsen 34 auch für ungeübtes Montagepersonal fehlerfrei durchzuführen.Alternatively, the
Claims (6)
- Ignition coil for ignition systems of internal combustion engines for motor vehicles, having at least one secondary connection component (17) which has at least one connection dome (19) which is rigidly connected to the ignition coil (11) and one spark plug connector (21) which can be coupled to the said connection dome (19) and can be plugged into a spark plug niche (20) of the internal combustion engine onto a spark plug (18), mounted in the spark plug niche (20), using a centring means (34) which is matched to the shape of the spark plug niche (20) allowing for movement play, characterized in that the connection dome (19) has a pin (22) for coupling the spark plug connector (21) and the centring means (34) is constructed as a separate component in the manner of a centring sleeve (34) and is captively secured on the spark plug connector (21).
- Ignition coil according to Claim 1, characterized in that the spark plug connector (21) has an elastic socket (28) which forms its outer boundary and on which at least one bead, in particular an annular bead (33), is constructed, which annular bead (33) can be moved into a locked position, holding the centring sleeve (34) in a positively engaging fashion, when the centring sleeve (34) is fitted onto the spark plug connector (21).
- Ignition coil according to Claim 2, characterized in that when the spark plug connector (21) is coupled to the pin (22) of the connection dome (19) the socket (28) is pushed over the connection dome (19) with a radial widening and, at the same time, the annular bead (33) is radially widened and this widening fixes the centring sleeve (34), which has been fitted onto the socket (28), in a frictionally and positively engaging fashion.
- Ignition coil according to Claims 1 to 3, characterized in that the centring sleeve (34) is matched to the shape, in particular the diameter, of the spark plug niche (20) and its external dimensions are smaller than the internal dimensions of the spark plug niche (20) by a degree of movement play.
- Ignition coil according to Claims 1-4, characterized in that the centring sleeve (34) is slightly conical in its external shape and the end side which is smaller in diameter faces the spark plug niche (20).
- Ignition coil according to one of the preceding claims, characterized in that the external surface of the centring sleeve (34) has at least one longitudinal groove (39).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9113753U | 1991-11-05 | ||
| DE9113753U DE9113753U1 (en) | 1991-11-05 | 1991-11-05 | Ignition coil for ignition systems of internal combustion engines |
| PCT/DE1992/000773 WO1993009345A1 (en) | 1991-11-05 | 1992-09-12 | Ignition coil for ignition systems of internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0565655A1 EP0565655A1 (en) | 1993-10-20 |
| EP0565655B1 true EP0565655B1 (en) | 1995-12-27 |
Family
ID=6872951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92919354A Expired - Lifetime EP0565655B1 (en) | 1991-11-05 | 1992-09-12 | Ignition coil for ignition systems of internal combustion engines |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5333592A (en) |
| EP (1) | EP0565655B1 (en) |
| JP (1) | JPH06503869A (en) |
| DE (2) | DE9113753U1 (en) |
| WO (1) | WO1993009345A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5547387A (en) * | 1993-08-05 | 1996-08-20 | Sumitomo Wiring Systems, Ltd. | Joint construction for ignition system |
| JPH0729822U (en) * | 1993-11-11 | 1995-06-02 | 住友電装株式会社 | Internal combustion engine ignition device |
| JP3556725B2 (en) * | 1995-03-20 | 2004-08-25 | 三菱電機株式会社 | Ignition device for internal combustion engine |
| JP3165000B2 (en) * | 1995-04-21 | 2001-05-14 | 株式会社日立製作所 | Ignition device for internal combustion engine |
| DE102019123721B4 (en) * | 2019-09-04 | 2021-09-30 | Man Energy Solutions Se | Rocker arm cover with spark plug contacts for an internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4514712A (en) * | 1975-02-13 | 1985-04-30 | Mcdougal John A | Ignition coil |
| DE3544870A1 (en) * | 1985-12-18 | 1987-06-19 | Beru Werk Ruprecht Gmbh Co A | SPARK PLUG |
| DE3851478T2 (en) * | 1987-06-30 | 1995-03-16 | Tdk Corp | Transformer. |
| US5003958A (en) * | 1988-12-27 | 1991-04-02 | Nissan Motor Co., Ltd. | Ignition coil mounting structure for engine |
| US4903674A (en) * | 1989-03-13 | 1990-02-27 | General Motors Corporation | Spark developing apparatus for internal combustion engines |
| JP2995763B2 (en) * | 1989-11-10 | 1999-12-27 | 株式会社デンソー | Ignition coil |
| ES2057622T3 (en) * | 1990-03-08 | 1994-10-16 | Nippon Denso Co | IGNITION COIL FOR AN INTERNAL COMBUSTION ENGINE. |
| FR2661216B1 (en) * | 1990-04-23 | 1992-08-14 | Electricfil Ind Sarl | INTEGRATED INDIVIDUAL IGNITION COIL OF AN INTERNAL COMBUSTION AND CONTROLLED IGNITION THERMAL ENGINE SPARK PLUG. |
| FR2661573B1 (en) * | 1990-04-25 | 1994-06-10 | Sgs Thomson Microelectronics | PULSE GRID CONTROL CIRCUIT WITH SHORT-CIRCUIT SECURITY. |
| US5152274A (en) * | 1990-08-01 | 1992-10-06 | Mitsubishi Denki Kabushiki Kaisha | Ignition coil apparatus |
| JPH04143461A (en) * | 1990-10-05 | 1992-05-18 | Honda Motor Co Ltd | Ignition device of internal combustion engine |
| JPH0544622A (en) * | 1991-08-12 | 1993-02-23 | Nippondenso Co Ltd | Ignitor of multi-cylinder internal combustion engine |
| US5241941A (en) * | 1992-09-03 | 1993-09-07 | Ford Motor Company | Ignition coil |
-
1991
- 1991-11-05 DE DE9113753U patent/DE9113753U1/en not_active Expired - Lifetime
-
1992
- 1992-09-12 EP EP92919354A patent/EP0565655B1/en not_active Expired - Lifetime
- 1992-09-12 WO PCT/DE1992/000773 patent/WO1993009345A1/en active IP Right Grant
- 1992-09-12 DE DE59204854T patent/DE59204854D1/en not_active Expired - Fee Related
- 1992-09-12 US US08/050,453 patent/US5333592A/en not_active Expired - Fee Related
- 1992-09-12 JP JP5508074A patent/JPH06503869A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0565655A1 (en) | 1993-10-20 |
| US5333592A (en) | 1994-08-02 |
| JPH06503869A (en) | 1994-04-28 |
| DE9113753U1 (en) | 1993-03-04 |
| WO1993009345A1 (en) | 1993-05-13 |
| DE59204854D1 (en) | 1996-02-08 |
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