WO2000003139A1 - Ignition coil unit for internal combustion engines - Google Patents

Ignition coil unit for internal combustion engines Download PDF

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Publication number
WO2000003139A1
WO2000003139A1 PCT/EP1999/004793 EP9904793W WO0003139A1 WO 2000003139 A1 WO2000003139 A1 WO 2000003139A1 EP 9904793 W EP9904793 W EP 9904793W WO 0003139 A1 WO0003139 A1 WO 0003139A1
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WO
WIPO (PCT)
Prior art keywords
ignition coil
ribs
coil unit
spark plug
internal combustion
Prior art date
Application number
PCT/EP1999/004793
Other languages
German (de)
French (fr)
Inventor
Bernhard Stock
Andreas Vom Schloss
Original Assignee
Audi 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 Audi Ag filed Critical Audi Ag
Publication of WO2000003139A1 publication Critical patent/WO2000003139A1/en

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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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]

Definitions

  • the invention relates to an ignition coil unit for internal combustion engines according to the preamble of claim 1.
  • Newer ignition systems in motor vehicles have ignition coil units in which the power output stage is already integrated and which are placed directly on the corresponding spark plugs.
  • Such an ignition coil unit essentially consists of a plug area and a head area, the ignition coil system with primary and secondary windings including a ferromagnetic core being arranged in the head area.
  • the ignition coil unit Since spark plugs are not designed for such mechanical loads in the area of the spark plug head, the ignition coil unit must be screwed to the cylinder head. For this purpose, corresponding bores are provided either directly on the housing of the ignition coil unit or on the projecting ferromagnetic core
  • Newer ignition coil units so-called Siabzü ⁇ dspulen, have a Spulen ⁇ y ⁇ tem with rod core, which is dimensioned so that it can be integrated in the elongated body of the Zünd ⁇ pulenü (connector area). Only electronic components (power amplifier) and a plug connection are housed in the head area. These ignition coil units are also screwed to the cylinder head.
  • each ignition coil unit has 2 or more screwing points. Because of these at least 8 screw connections, the motor assembly is relatively complex.
  • the object of the present invention is to provide an ignition coil unit for internal combustion engines, which enables easier assembly without screw connections.
  • the essential idea of the invention is the housing of a ignition coil comprising a core rod with Zündspulen ⁇ ystem, instead of providing holes as tantaxe, ela ⁇ ti ⁇ che ribs which abut when placing the Zünd ⁇ pulenritt to the spark plug on the wall 'of the plug hole. Because of the clamping action of the ribs, the ignition coil unit is firmly fixed to the cylinder head of the internal combustion engine. Harmful moments that could lead to damage to the spark plug cannot occur.
  • the assembly is considerably simplified, since after the ignition coil unit has been plugged onto the spark plug, no further screw connections are necessary.
  • FIG. 1 shows a schematic view of a device according to the invention
  • FIG. 2 schematic view of an ignition coil unit according to the invention according to FIG. 1 in an enlarged view
  • FIG. 1 shows an ignition coil unit 1 according to the invention, which is inserted into a spark plug bore 32 of a cylinder head 30 of an internal combustion engine (not shown in more detail).
  • the ignition coil unit 1 sits on a spark plug 50 which is arranged in the spark plug bore 32.
  • a plurality of ribs 20 are provided on the housing 5 of the ignition coil unit 1, which abut the wall 34 of the spark plug bore 32.
  • an extension 34a is provided, which serves to receive the ribs 20a.
  • the ignition coil unit 1 is shown enlarged in FIG. 2.
  • the ignition coil unit 1 designed as a rod ignition coil essentially consists of the rod-shaped housing 5 that has a plug connection 7 at one end.
  • the housing 5 comprises a Spulen ⁇ y ⁇ tem 10 with rod core 12.
  • the coil system 10 consists of primary and secondary winding, which are not shown in detail.
  • a number of elastic ribs 20 are provided, which abut the wall 34 of the cylinder head bore 32 and serve as connecting elements for fixing to the cylinder head 30.
  • This tilting of the Zünd ⁇ pulentician 1 in the Zündkerzenboh ⁇ tion 32 is avoided and thus a transmission of moments to the spark plugs neck 52 and the center electrode 54 of the spark plug 50 excluded. Screw connections to the cylinder head 30 are no longer necessary.
  • the wall 34 of the spark plug bore 32 is only shown in broken lines in FIG. 2.
  • the ribs 20a and 20b are advantageously arranged in the region of the ends of the rod core 12.
  • the center of gravity of the ignition coil unit 1, which coincides approximately with the center of gravity of the rod core 12, is optimally supported and transverse forces that occur are evenly distributed over the ribs 20a and 20b.
  • the ribs 20 as ribs running around the housing 20. This ensures better flexibility of the ribs 20, particularly in the direction of insertion.
  • the elastic ribs 20 can bend slightly to facilitate the insertion process.
  • the ribs 20a consist of 4 individual ribs and the ribs 20b consist of 2 individual ribs.
  • the number of individual ribs can vary. However, it should be adapted to the weight of the ignition coil unit 1.
  • a projection 9 is provided on the housing 5, which is designed to match a corresponding groove (not shown) in the spark plug bore 30.
  • the projection 9 can be elastic or rigid. Groove and projection 9 form an anti-rotation device, by means of which mechanical stress on the connecting cable including the connecting plug and the associated plug connection 7 (4-pin RD plug) of the ignition coil unit 1 is avoided. Since the ribs 20 would form an airtight seal when the ignition coil unit 1 was inserted into the spark plug bore 32, which would result in an increased expenditure of force during assembly, small recesses in the form of bores or incisions are provided on the ribs 20, which form an air passage through which the compressed air can escape.
  • the individual rib 21 closing off the spark plug bore 32 has no such recess. It thus seals the spark plug bore 32 in a water-tight manner.
  • the extension 34a forms a support 35 which, however, maintains a certain distance from the bottom of the ribs 20a. As a result, the weight of the ignition coil unit 1 is not supported and the vertical force on the spark plug 50 is maintained.
  • the lower end of the tab-shaped housing 5 is designed as a grommet 5a which overlaps the spark plug neck 52 of the schematically indicated spark plug 50.
  • the electrical connection between the ignition coil unit 1 and the center electrode 54 of the spark plug 50 is not shown in detail.
  • a total of three individual ribs are also provided on the spout 5a ⁇ several ribs 20c. These single ribs also have an air passage in order to avoid excess pressure in the enclosed air space.
  • These single ribs can also be arranged in the longitudinal direction of extension of the ignition coil unit. They mainly serve for guidance within the spark plug bore and thereby facilitate the placement process of the ignition coil unit 1 on the center electrode 54.
  • grommet 5a, housing 5 and all the ribs 20 are made in one piece as a cover made of silicone rubber.
  • the coating has a basic wall thickness of approx. 1 mm.
  • the ribs 20a protrude about 3 mm, the ribs 20b about 2 mm.
  • the cylinder head is covered with a cylinder head cover.
  • the shaft into which the spark plug is inserted extends partly onto the cylinder head itself and partly onto the cylinder head cover.
  • Fig. 2 is indicated by a dashed line L, where the dividing line between the cylinder head and the cylinder head cover would run approximately.
  • the cylinder head cover is also firmly connected to the cylinder head, it is not important for the function of the ribs 20a whether they are supported on the wall 32 of the cylinder head bore 30 or on the wall of a corresponding opening in a cylinder head cover.
  • an ignition coil unit is also fixed in the corresponding spark plug shaft.
  • forces, in particular moments cannot be transmitted to the spark plug.
  • the ignition coil unit 1 When the ignition coil unit 1 is installed, it is simply inserted into the spark plug bore 30 until it locks into place with the center electrode of the spark plug 50. During the insertion process, the individual ribs bend against the insertion direction and slide so easily on the Along wall 34. Due to the clamping effect of the individual ribs 20, the ignition coil unit 1 sits relatively firmly in the spark plug bore. After establishing the connection with the engine control unit by inserting a plug into the plug connection 7, the ignition coil unit 1 is ready for use. Elaborate screw connections are no longer necessary. This shortens the assembly time considerably.
  • the present invention can be summarized as follows.
  • a plurality of ribs 20 are provided as connecting elements to the cylinder head 30 of the internal combustion engine.
  • the ignition coil unit 1 is held firmly in a spark plug bore 32 by the ribs 20.
  • the usual screw connections can be omitted and the assembly is considerably simplified.

Abstract

The invention relates to an ignition coil unit (1) for internal combustion engines in which a plurality of ribs (20) are provided as connecting elements to the cylinder head (30) of an internal combustion engine. The ribs (20) permit the ignition coil (1) to be held in a spark plug hole (32) in a fixed manner. As a result, the use of common bolted connections is no longer required and the assembly is considerably simplified.

Description

ZÜNDSPULENEINHEIT FÜR BRENNKRAFTMASCHINEN IGNITION COIL UNIT FOR INTERNAL COMBUSTION ENGINES
Die Erfindung betrifft eine Zündspuleneinheit für Brennkraftmaschinen gemäß dem Oberbegriff des Anspruchs 1.The invention relates to an ignition coil unit for internal combustion engines according to the preamble of claim 1.
Neuere Zündsysteme in Kraftfahrzeugen weisen Zündspuleneinheiten auf, in denen die Leistungsendstufe bereits integriert ist und die direkt auf die entsprechenden Zündkerzen aufgesetzt werden.Newer ignition systems in motor vehicles have ignition coil units in which the power output stage is already integrated and which are placed directly on the corresponding spark plugs.
Eine derartige Zündspuleneinheit besteht im wesentlichen aus einem Steckerbereich und einem Kopfbereich, wobei im Kopfbereich das Zündspulensystem, mit Primär- und Sekundärwicklung einschließlich ferromagnetischem Kern, angeordnet ist.Such an ignition coil unit essentially consists of a plug area and a head area, the ignition coil system with primary and secondary windings including a ferromagnetic core being arranged in the head area.
Aufgrund dieser metallischen Bestandteile ist eine solche Zündspuleneinheit relativ schwer. Der Schwerpunkt liegt durch die Anordnung des Zündspulensystems im Kopfbereich relativ weit entfernt vom Verbindungspunkt Zündspuleneinheit-Zündkerze. Durch Vibrationen der Zündεpuleneinheit im Betrieb der Brennkraftmaschine können so größere Kräfte insbesondere Momente auf die Zündkerze übertragen werden.Because of these metallic components, such an ignition coil unit is relatively heavy. The focus is due to the arrangement of the ignition coil system in the head area relatively far from the connection point ignition coil unit-spark plug. Vibrations of the ignition coil unit during operation of the internal combustion engine can transmit larger forces, in particular moments, to the spark plug.
Da Zündkerzen nicht für derartige mechanische Belastungen im Zündkerzenhaisbereich ausgelegt sind, ist eine Verschraubung der Zündspuleneinheit am Zylinderkopf notwendig. Hierfür sind entweder direkt am Gehäuse der Zündεpuleneinheit oder am überstehenden ferromagnetischen Kern entsprechende Bohrungen alsSince spark plugs are not designed for such mechanical loads in the area of the spark plug head, the ignition coil unit must be screwed to the cylinder head. For this purpose, corresponding bores are provided either directly on the housing of the ignition coil unit or on the projecting ferromagnetic core
Verbindungselemente vorgesehen. Neuere Zündspuleneinheiten, sogenannte Siabzüπdspulen, weisen ein Spulenεyεtem mit Stabkern auf, das so dimensioniert ist, daß es im langeεtreckten Körper der Zündεpuleneinheit (Steckerbereich) integriert werden kann. Im Kopfbereich sind nur elektronische Bauteile (Endstufe) sowie ein Steckeranschluß untergebracht. Auch diese Zündspuleneinheiten werden noch am Zylinderkopf verschraubt.Fasteners provided. Newer ignition coil units, so-called Siabzüπdspulen, have a Spulenεyεtem with rod core, which is dimensioned so that it can be integrated in the elongated body of the Zündεpuleneinheit (connector area). Only electronic components (power amplifier) and a plug connection are housed in the head area. These ignition coil units are also screwed to the cylinder head.
Bei einem 4-Zylindermotor εind insgesamt vier Zündspuleneinheiten bei der Montage zu montieren. Jede Zündspuleneinheit weist 2 oder mehr Verschraubungεpunkte auf. Aufgrund dieser mindeεtenε 8 Verschraubungen ist die Motormontage relativ aufwendig.In the case of a 4-cylinder engine, a total of four ignition coil units must be installed during assembly. Each ignition coil unit has 2 or more screwing points. Because of these at least 8 screw connections, the motor assembly is relatively complex.
Aufgabe der vorliegenden Erfindung ist es, eine Zündspuleneinheit für Brennkraftmaschinen zu schaffen, die eine einfachere Montage ohne Verschraubungen ermöglicht.The object of the present invention is to provide an ignition coil unit for internal combustion engines, which enables easier assembly without screw connections.
Gelöst wird diese Aufgabe durch die im Anspruch 1 angegebenen Mittel.This object is achieved by the means specified in claim 1.
Die wesentliche Idee der Erfindung besteht darin, am Gehäuse einer Zündspuleneinheit das ein Zündspulenεystem mit Stabkern umfaßt, anstatt Bohrungen als Verbindungεeiemente, elaεtiεche Rippen vorzusehen, die beim Aufsetzen der Zündεpuleneinheit auf die Zündkerze an der Wandung ' der Zündkerzenbohrung anliegen. Aufgrund der Klemmwirkung der Rippen ist die Zündεpuleneinheit fest am Zylinderkopf der Brennkraftmaschine fixiert. Schädliche Momente, die zu einer Beschädigung der Zündkerze führen könnten, können εo nicht entεtehen.The essential idea of the invention is the housing of a ignition coil comprising a core rod with Zündspulenεystem, instead of providing holes as Verbindungεeiemente, elaεtiεche ribs which abut when placing the Zündεpuleneinheit to the spark plug on the wall 'of the plug hole. Because of the clamping action of the ribs, the ignition coil unit is firmly fixed to the cylinder head of the internal combustion engine. Harmful moments that could lead to damage to the spark plug cannot occur.
Mit Hilfe der erfindungεgemäßen Zündεpuleneinheit vereinfacht sich die Montage erheblich, da nach dem Aufstecken der Zündspuleneinheit auf die Zündkerze keine weiteren Verschraubungen mehr notwendig sind.With the help of the ignition coil unit according to the invention, the assembly is considerably simplified, since after the ignition coil unit has been plugged onto the spark plug, no further screw connections are necessary.
Vorteilhafte Weiterentwicklungen der Erfindung sind in den Unteransprüchen angegeben. Nachfolgend ist die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeiεpielε näher erläutert.Advantageous further developments of the invention are specified in the subclaims. The invention is explained in more detail below with reference to an embodiment example shown in the drawing.
Es zeigen: Fig.1 εchematische Ansicht einer erfindungsgemäßen1 shows a schematic view of a device according to the invention
Zündεpuleneinheit mit Zylinderkopf Fig. 2 schematische Ansicht einer erfindungsgemäßen Zündεpuleneinheit gemäß Fig. 1 in vergrößerter DarstellungIgnition coil unit with cylinder head FIG. 2 schematic view of an ignition coil unit according to the invention according to FIG. 1 in an enlarged view
In Figur 1 ist eine erfindungsgemäße Zündεpuleneinheit 1 , die in eine Zündkerzenbohrung 32 eines Zylinderkopfes 30 einer nicht näher dargestellten Brennkraftmaschine eingesetzt ist, abgebildet. Die Zündspuleπeinheit 1 sitzt auf einer Zündkerze 50, die in der Zündkerzenbohrung 32 angeordnet ist. Am Gehäuse 5 der Zündspuleneinheit 1 sind mehrere Rippen 20 vorgesehen, die an der Wandung 34 der Zündkerzenbohrung 32 anliegen. Am offenen Ende der Zündkerzenbohrung 32 ist eine Erweiterung 34a vorgesehen, die zur Aufnahme der Rippen 20a dient.FIG. 1 shows an ignition coil unit 1 according to the invention, which is inserted into a spark plug bore 32 of a cylinder head 30 of an internal combustion engine (not shown in more detail). The ignition coil unit 1 sits on a spark plug 50 which is arranged in the spark plug bore 32. A plurality of ribs 20 are provided on the housing 5 of the ignition coil unit 1, which abut the wall 34 of the spark plug bore 32. At the open end of the spark plug bore 32, an extension 34a is provided, which serves to receive the ribs 20a.
In Fig. 2 ist die Zündspuleneinheit 1 vergrößert dargestellt. Die als Stabzündspule ausgebildete Zündεpuleneinheit 1 beεteht im weεentlichen aus dem εtabförmigen Gehäuse 5, daε an einem Ende einen Steckeranεchluß 7 aufweiεt. Das Gehäuse 5 umfaßt ein Spulenεyεtem 10 mit Stabkern 12. Das Spulensystem 10 besteht aus Primär- und Sekundärwicklung, die nicht näher dargestellt sind.The ignition coil unit 1 is shown enlarged in FIG. 2. The ignition coil unit 1 designed as a rod ignition coil essentially consists of the rod-shaped housing 5 that has a plug connection 7 at one end. The housing 5 comprises a Spulenεyεtem 10 with rod core 12. The coil system 10 consists of primary and secondary winding, which are not shown in detail.
Am Gehäuse 5 der Zündspuleneinheit 1 sind mehrere elaεtiεche Rippen 20 vorgeεehen, die an der Wandung 34 der Zylinderkopfbohrung 32 anliegen und εo alε Verbindungεelemente zur Fixierung am Zylinderkopf 30 dienen. Dadurch wird ein Verkippen der Zündεpuleneinheit 1 in der Zündkerzenboh¬ rung 32 vermieden und somit eine Übertragung von Momenten auf den Zündkerzenhals 52 bzw. auf die Mittelelektrode 54 der Zündkerze 50 ausgeεchlossen. Verschraubungen mit dem Zyiinderkopf 30 sind nicht mehr notwendig . Die Wandung 34 der Zündkerzenbohrung 32 ist in Fig. 2 nur gestrichelt dargestellt.On the housing 5 of the ignition coil unit 1, a number of elastic ribs 20 are provided, which abut the wall 34 of the cylinder head bore 32 and serve as connecting elements for fixing to the cylinder head 30. This tilting of the Zündεpuleneinheit 1 in the Zündkerzenboh ¬ tion 32 is avoided and thus a transmission of moments to the spark plugs neck 52 and the center electrode 54 of the spark plug 50 excluded. Screw connections to the cylinder head 30 are no longer necessary. The wall 34 of the spark plug bore 32 is only shown in broken lines in FIG. 2.
In vorteilhafter Weise sind die Rippen 20a und 20b jeweils im Bereich der Enden des Stabkerns 12 angeordnet. So ist der Schwerpunkt der Zündspuleneinheit 1 , der etwa mit dem Schwerpunkt des Stabkerns 12 zusammenfällt, optimal abgestützt und auftretende Querkräfte werden auf die Rippen 20a bzw. 20b gleichmäßig verteilt.The ribs 20a and 20b are advantageously arranged in the region of the ends of the rod core 12. The center of gravity of the ignition coil unit 1, which coincides approximately with the center of gravity of the rod core 12, is optimally supported and transverse forces that occur are evenly distributed over the ribs 20a and 20b.
Denkbar ist die Rippen 20 parallel zur Längεerεtreckungεrichtung der Zündεpuleneinheit 1 anzuordnen.It is conceivable to arrange the ribs 20 parallel to the longitudinal direction of the ignition coil unit 1.
Es hat sich aber als vorteilhaft herausgestellt, die Rippen 20 als um das Gehäuse 20 umlaufende Rippen auszugestalten. Dadurch wird eine besεere Nachgiebigkeit der Rippen 20 inεbeεondere in Einschubrichtung gewährleistet. Die elastischen Rippen 20 können zur Erleichterung des Einsetzvorganges geringfügig umbiegen.However, it has proven to be advantageous to design the ribs 20 as ribs running around the housing 20. This ensures better flexibility of the ribs 20, particularly in the direction of insertion. The elastic ribs 20 can bend slightly to facilitate the insertion process.
Im vorliegenden Auεführungsbeiεpiel beεtehen die Rippen 20a aus 4 Einzelrippen und die Rippen 20b aus 2 Einzelrippen.In the present exemplary embodiment, the ribs 20a consist of 4 individual ribs and the ribs 20b consist of 2 individual ribs.
Die Anzahl der Einzelrippen kann variieren. Sie sollte jedoch jeweils dem Gewicht der Zündspuleneinheit 1 angepaßt werden.The number of individual ribs can vary. However, it should be adapted to the weight of the ignition coil unit 1.
Da ohne Schraubverbindung eine Verdrehen der Zündspuleneinheit 1 möglich ist, iεt ein Vorεprung 9 am Gehäuse 5 vorgesehen, der paεεend zu einer entεprechenden nicht dargeεtellten Nut in der Zündkerzenbohrung 30 ausgebildet ist. Der Vorεprung 9 kann elastisch oder starr ausgebildet εein. Nut und Vorsprung 9 bilden eine Verdrehsicherung, durch die eine mechanische Belastung des Anεchlußkabels einschließlich des Verbindungεεteckers sowie des zugehörigen Steckeranschluß 7 (4pol RD- Stecker) der Zündspuleneinheit 1 vermieden wird. Da die Rippen 20 beim Einsetzen der Zündspuieneinheit 1 in die Zündkerzenbohrung 32 einen luftdichten Abschluß bilden würden, was einen erhöhten Kraftaufwand bei der Montage zur Folge hätte, εind an den Rippen 20 jeweils kleine Ausnehmungen in Form von Bohrungen oder Einschnitten vorgesehen, die einen Luftdurchlaß bilden, durch die die komprimierte Luft entweichen kann.Since the ignition coil unit 1 can be rotated without a screw connection, a projection 9 is provided on the housing 5, which is designed to match a corresponding groove (not shown) in the spark plug bore 30. The projection 9 can be elastic or rigid. Groove and projection 9 form an anti-rotation device, by means of which mechanical stress on the connecting cable including the connecting plug and the associated plug connection 7 (4-pin RD plug) of the ignition coil unit 1 is avoided. Since the ribs 20 would form an airtight seal when the ignition coil unit 1 was inserted into the spark plug bore 32, which would result in an increased expenditure of force during assembly, small recesses in the form of bores or incisions are provided on the ribs 20, which form an air passage through which the compressed air can escape.
Teilweise ist ein wasserdichter Abschluß der Zündkerzenbohrung 32 jedoch gewünscht. In diesem Fall weist die die Zündkerzenbohrung 32 abschließende Einzelrippe 21 keine derartige Ausnehmung auf. Sie dichtet εomit die Zündkerzenbohrung 32 waεεerdicht ab.In some cases, however, a watertight closure of the spark plug bore 32 is desired. In this case, the individual rib 21 closing off the spark plug bore 32 has no such recess. It thus seals the spark plug bore 32 in a water-tight manner.
Entsteht beim Betrieb der Brennkraftmaschine durch Erwärmung ein Überdruck im Luftraum der Zündkerzenbohrung 32, so wird die oberste Einzelrippe 21 etwas elastisch verformt und gibt dadurch einen Durchgang zwischen ihr und der Wandung 34 frei, dadurch kann der Überdruck einfach entweichen. Die Gefahr eines Abhebenε der Zündεpuleneinheit 1 von der Zündkerze 50 und eineε damit verbundenen Kontaktverluεtes aufgrund des Überdrucks besteht nicht.If an overpressure arises in the air space of the spark plug bore 32 during operation of the internal combustion engine due to heating, the uppermost individual rib 21 is deformed somewhat elastically and thereby releases a passage between it and the wall 34, as a result of which the excess pressure can simply escape. There is no risk of the ignition coil unit 1 being lifted off the spark plug 50 and a contact loss associated therewith due to the excess pressure.
Die Erweiterung 34a bildet eine Auflage 35, die jedoch einen gewisεen Abεtand zur unterεten der Rippen 20a einhält. Dadurch wird das Gewicht der Zündspuleneinheit 1 nicht abgestützt und so die senkrechte Krafteinwirkung auf die Zündkerze 50 aufrechterhalten.The extension 34a forms a support 35 which, however, maintains a certain distance from the bottom of the ribs 20a. As a result, the weight of the ignition coil unit 1 is not supported and the vertical force on the spark plug 50 is maintained.
Das untere Ende des εtabförmigen Gehäuεeε 5 ist als Tülle 5a auεgebildet, die den Zündkerzenhals 52 der schematisch angedeuteten Zündkerze 50, übergreift. Die elektrische Verbindung zwischen Zündspuleneinheit 1 und Mittelelektrode 54 der Zündkerze 50 ist nicht näher dargestellt. Auch an der Tülle 5a εind meherer Rippen 20c insgesamt drei Einzelrippen vorgesehen. Diese Einzeirippen weisen ebenfalls einen Luftdurchlaß auf, um einen Überdruck im eingeschloεεenen Luftraum zu vermeiden. Diese Einzeirippen könne auch in Längserεtreckungsrichtung der Zündεpuleneinheit angeordnet εein. Sie dienen hauptεächlich zur Führung innerhalb der Zündkerzenbohrung und erleichtern dadurch den Aufεetzvorgang der Zündεpuleneinheit 1 auf die Mittelelektrode 54.The lower end of the tab-shaped housing 5 is designed as a grommet 5a which overlaps the spark plug neck 52 of the schematically indicated spark plug 50. The electrical connection between the ignition coil unit 1 and the center electrode 54 of the spark plug 50 is not shown in detail. A total of three individual ribs are also provided on the spout 5a ε several ribs 20c. These single ribs also have an air passage in order to avoid excess pressure in the enclosed air space. These single ribs can also be arranged in the longitudinal direction of extension of the ignition coil unit. They mainly serve for guidance within the spark plug bore and thereby facilitate the placement process of the ignition coil unit 1 on the center electrode 54.
Zur Vereinfachung der Herεtelluπg einer solchen erfindungεgemäßen Zündεpuleneinheit 1 sind Tülle 5a, Gehäuse 5 sowie alle Rippen 20 einεtückig als Überzug aus Silikongummi hergestellt. Der Überzug hat eine Grundwandεtärke von ca. 1 mm. Die Rippen 20a εtehen ca 3 mm, die Rippen 20b ca 2 mm über.In order to simplify the manufacture of such an ignition coil unit 1 according to the invention, grommet 5a, housing 5 and all the ribs 20 are made in one piece as a cover made of silicone rubber. The coating has a basic wall thickness of approx. 1 mm. The ribs 20a protrude about 3 mm, the ribs 20b about 2 mm.
Zu erwähnen iεt noch, daß bei manchen Brennkraftmaεchinen der Zylinderkopf mit einer Zylinderkopfhaube abgedeckt ist. Der Schacht in den die Zündkerze eingeεetzt wird, erεtreckt εich dabei teilweiεe auf den Zylinderkopf selbst und teilweise auf die Zylinderkopfabdeckung. In Fig. 2 ist durch eine gestrichelte Linie L angedeutet, wo die Trennlinie zwischen Zylinderkopf und Zylinderkopfabdeckung etwa verlaufen würde. Da aber auch die Zylinderkopfabdeckung fest mit dem Zylinderkopf verbunden ist es für die Funktion der Rippen 20a nicht erheblich, ob sie sich an der Wandung 32 der Zylinderkopfbohrung 30 oder an der Wandung einer entsprechenden Öffnung in einer Zylinderkopfabdeckung abεtützen. In dieεem Fall ist eine Zündspuleneinheit ebenfallε feεt im entεprechenden Zündkerzenεchacht fixiert. Auch hier kann keine Übertragung von Kräften inεbeεondere von Momenten auf die Zündkerze erfolgen.It should also be mentioned that in some internal combustion engines the cylinder head is covered with a cylinder head cover. The shaft into which the spark plug is inserted extends partly onto the cylinder head itself and partly onto the cylinder head cover. In Fig. 2 is indicated by a dashed line L, where the dividing line between the cylinder head and the cylinder head cover would run approximately. However, since the cylinder head cover is also firmly connected to the cylinder head, it is not important for the function of the ribs 20a whether they are supported on the wall 32 of the cylinder head bore 30 or on the wall of a corresponding opening in a cylinder head cover. In this case, an ignition coil unit is also fixed in the corresponding spark plug shaft. Here, too, forces, in particular moments, cannot be transmitted to the spark plug.
Nachfolgend iεt die Montage und die Funktion der Zündεpuleneinheit 1 näher erläutert.The assembly and the function of the ignition coil unit 1 are explained in more detail below.
Bei der Montage der Zündεpuleneinheit 1 wird diese einfach in die Zündkerzenbohrung 30 eingesetzt bis eine Verrastung mit der Mittelelektrode der Zündkerze 50 erfolgt. Beim Einεetzvorgang biegen εich die Einzeirippen entgegen der Einεchubrichtung und gleiten εo leicht an der Wandung 34 entlang. Aufgrund der Klemmwirkung der einzelnen Rippen 20 sitzt die Zündεpuleneinheit 1 relativ feεt in der Zündkerzenbohrung. Nach Herstellung der Verbindung mit dem Motorεteuergerät durch Einsetzen eines Steckers in den Steckeranεchluß 7 ist die Zündεpuleneinheit 1 einsatzbereit. Aufwendige Verschraubungen εind nicht mehr notwendig. Dadurch verkürzt εich die Montagezeit erheblich.When the ignition coil unit 1 is installed, it is simply inserted into the spark plug bore 30 until it locks into place with the center electrode of the spark plug 50. During the insertion process, the individual ribs bend against the insertion direction and slide so easily on the Along wall 34. Due to the clamping effect of the individual ribs 20, the ignition coil unit 1 sits relatively firmly in the spark plug bore. After establishing the connection with the engine control unit by inserting a plug into the plug connection 7, the ignition coil unit 1 is ready for use. Elaborate screw connections are no longer necessary. This shortens the assembly time considerably.
Aufgrund deε relativ feεten Sitzeε der Zündεpuleneinheit 1 innerhalb der Zündkerzenbohrung 30 iεt im Betrieb der Brennkraftmaεchine eine Relativbewegung von Zündεpuleneinheit 1 und Zündspule 50 zueinander ausgeschlossen. Dadurch können aber auch keine Kräfte inεbeεondere Momente von der Zündεpuleneinheit 1 auf den Zündkerzenhals übertragen werden.Due to the relatively tight seating of the ignition coil unit 1 within the spark plug bore 30, a relative movement of the ignition coil unit 1 and the ignition coil 50 with respect to one another is excluded during operation of the internal combustion engine. As a result, however, no forces in particular moments can be transmitted from the ignition coil unit 1 to the spark plug neck.
Die vorliegende Erfindung läßt sich wie folgt zusammenfasεen.The present invention can be summarized as follows.
Bei der Zündεpuleneinheit 1 für Brennkraftmaεchinen εind mehrere Rippen 20 alε Verbindungselemente zum Zylinderkopf 30 der Brennkraftmaεchine vorgeεehen. Durch die Rippen 20 wird die Zündεpuleneinheit 1 feεt in einer Zündkerzenbohrung 32 gehalten. Dadurch können die üblichen Verεchraubungen entfallen und die Montage wird erheblich vereinfacht. In the ignition coil unit 1 for internal combustion engines, a plurality of ribs 20 are provided as connecting elements to the cylinder head 30 of the internal combustion engine. The ignition coil unit 1 is held firmly in a spark plug bore 32 by the ribs 20. As a result, the usual screw connections can be omitted and the assembly is considerably simplified.

Claims

A N S P R U C H E EXPECTATIONS
1. Zündspuleneinheit für Brennkraftmaschinen mit einem ein Zündεpulensyεtem mit Stabkern umfassenden Gehäuεe, das mittels Verbindungεelemente am Zylinderkopf der Brennkraftmaεchine fixiert ist, dadurch gekennzeichnet, daß die Verbindungεelemente als elastiεche Rippen (20) auεgebildet sind, die bei eingesetzter Zündspuieneinheit (1) an der Wandung (34) einer im Zylinderkopf (30) vorgesehenen Zündkerzenbohrung (32) anliegen.1. Ignition coil unit for internal combustion engines with a housing comprising an ignition coil system with rod core, which is fixed by means of connecting elements to the cylinder head of the internal combustion engine, characterized in that the connecting elements are designed as elastic ribs (20) on the wall when the ignition coil unit (1) is inserted ( 34) of a spark plug bore (32) provided in the cylinder head (30).
2. Zündεpuleneinheit nach Anεpruch 1 , dadurch gekennzeichnet, daß die Rippen (20 a, 20 b) jeweils im Bereich der Enden des Stabkerns (12) angeordnet sind.2. Ignition coil unit according to claim 1, characterized in that the ribs (20 a, 20 b) are each arranged in the region of the ends of the rod core (12).
3. Zündspuieneinheit nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß die Rippen (20) als um das Gehäuse (5) umlaufende Rippen ausgebildet εind, wobei die Rippen (20a, 20b, 20c) aus mehreren Einzeirippen bestehen.3. Zündspuieneinheit according to claim 1 or claim 2, characterized in that the ribs (20) εind formed around the housing (5) circumferential ribs, the ribs (20a, 20b, 20c) consist of several single ribs.
4. Zündspuieneinheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein Vorsprung (9) am Gehäuse (5) der Zündspuieneinheit (1) als Verdrehsicherung vorgesehen ist.4. Zündspuieneinheit according to any one of the preceding claims, characterized in that a projection (9) on the housing (5) of the Zündspuieneinheit (1) is provided as an anti-rotation device.
5. Zündspuieneinheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an den umlaufenden Rippen (20) je eine Ausnehmung als Luftdurchlaß vorgesehen ist. 5. Zündspuieneinheit according to any one of the preceding claims, characterized in that a recess is provided as an air passage on the circumferential ribs (20).
6. Zündεpuleneinheit nach Anεpruch 5, dadurch ge enn t?ichnet, daß die Zündkerzenbohrung (32) abschließende Einzelrippe (21) keine Ausnehmung aufweist.6. Ignition coil unit according to claim 5, characterized in that the spark plug bore (32) closing individual rib (21) has no recess.
7. Zündspuieneinheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß am Gehäuse (5) eine Tülle (5a) mit Rippen (20c) vorgeεehen ist. 7. Zündspuieneinheit according to any one of the preceding claims, characterized in that on the housing (5) a grommet (5a) with ribs (20c) is provided.
PCT/EP1999/004793 1998-07-11 1999-07-08 Ignition coil unit for internal combustion engines WO2000003139A1 (en)

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DE19831196.6 1998-07-11
DE1998131196 DE19831196C2 (en) 1998-07-11 1998-07-11 Ignition coil unit for internal combustion engines

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19851127C2 (en) * 1998-11-06 2003-08-21 Beru Ag Spark plug Brace
DE10257101B3 (en) * 2002-12-05 2004-05-19 Robert Bosch Gmbh Vehicle engine ignition coil in rod configuration, employs plastic over-injection molding to seal magnetic return section and form casing for coil
DE10256802B3 (en) * 2002-12-05 2004-04-15 Robert Bosch Gmbh Rod ignition coil for automobile IC engine has first coil body, its coil winding and associated resin mass acting as second coil body for second coil winding
DE102008062883A1 (en) * 2008-12-12 2010-06-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Device for sealed arrangement of ignition rod module of internal-combustion engine of motor vehicle in cover of cam shaft housing, has sealing unit with seal bushing arranged on head of ignition rod module
JP5093375B2 (en) * 2011-03-16 2012-12-12 三菱電機株式会社 Ignition coil device
US8225775B1 (en) 2011-08-05 2012-07-24 Mitsubishi Electric Corporation Ignition coil device
DE102013016938A1 (en) * 2013-10-11 2015-04-16 Man Diesel & Turbo Se Otto gas engine
SE545045C2 (en) * 2021-03-08 2023-03-07 Sem Ab Ignition coil assembly for combustion engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0579487A2 (en) * 1992-07-16 1994-01-19 Sumitomo Wiring Systems, Ltd. Coupling construction
EP0713005A2 (en) * 1994-11-17 1996-05-22 Sumitomo Wiring Systems, Ltd. Connection of an ignition coil and a spark plug for internal combustion engine
EP0715073A2 (en) * 1994-11-30 1996-06-05 Bayerische Motoren Werke Aktiengesellschaft Apparatus for coupling one coil per plug ignition system with a cylinder head for an internal combustion engine
EP0796993A2 (en) * 1996-03-21 1997-09-24 Hitachi, Ltd. Ignition apparatus for use in internal combustion engine
US5842458A (en) * 1997-08-12 1998-12-01 Cummins Engine Company, Inc. Spark plug boot with ventable seal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3498449B2 (en) * 1995-11-08 2004-02-16 株式会社デンソー Ignition device for internal combustion engine
JP3393770B2 (en) * 1995-12-11 2003-04-07 株式会社デンソー Ignition coil for internal combustion engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0579487A2 (en) * 1992-07-16 1994-01-19 Sumitomo Wiring Systems, Ltd. Coupling construction
EP0713005A2 (en) * 1994-11-17 1996-05-22 Sumitomo Wiring Systems, Ltd. Connection of an ignition coil and a spark plug for internal combustion engine
EP0715073A2 (en) * 1994-11-30 1996-06-05 Bayerische Motoren Werke Aktiengesellschaft Apparatus for coupling one coil per plug ignition system with a cylinder head for an internal combustion engine
EP0796993A2 (en) * 1996-03-21 1997-09-24 Hitachi, Ltd. Ignition apparatus for use in internal combustion engine
US5842458A (en) * 1997-08-12 1998-12-01 Cummins Engine Company, Inc. Spark plug boot with ventable seal

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