EP1929490B1 - Transformateur d'allumage en barre destine a alimenter en haute tension un moyen d'allumage, en particulier une bougie d'allumage d'un moteur a combustion interne - Google Patents

Transformateur d'allumage en barre destine a alimenter en haute tension un moyen d'allumage, en particulier une bougie d'allumage d'un moteur a combustion interne Download PDF

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Publication number
EP1929490B1
EP1929490B1 EP06778426A EP06778426A EP1929490B1 EP 1929490 B1 EP1929490 B1 EP 1929490B1 EP 06778426 A EP06778426 A EP 06778426A EP 06778426 A EP06778426 A EP 06778426A EP 1929490 B1 EP1929490 B1 EP 1929490B1
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EP
European Patent Office
Prior art keywords
secondary winding
winding
transformer
distance
extremity
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Not-in-force
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EP06778426A
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German (de)
English (en)
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EP1929490A1 (fr
Inventor
Tycho Weissgerber
Guido Bayard
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Pulse GmbH and Co KG
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Pulse GmbH
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Publication of EP1929490A1 publication Critical patent/EP1929490A1/fr
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Not-in-force legal-status Critical Current
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H01F2038/122—Ignition, e.g. for IC engines with rod-shaped core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures

Definitions

  • the invention relates to a Stabzünd transformer for supplying an ignition means with high voltage.
  • the rod ignition transformer has a main core region about which a first inner winding and a second outer winding are arranged concentrically with the longitudinal axis of the rod ignition transformer.
  • One of the windings is a primary winding and the other winding is a secondary winding.
  • Stabzündtransformatoren are known in which the transformer core is connected to a ground potential of the motor vehicle, whereby the transformer core has this ground potential.
  • the primary coil is arranged inside coaxially around the transformer core around and the secondary coil is arranged externally around the primary coil around coaxially, wherein the secondary coil is surrounded by a jacket of insulating material outside.
  • bar ignition transformers are known in which the secondary coil is arranged on the inside around the transformer core.
  • the primary coil is arranged externally around the secondary coil, whereby these bar-type ignition transformers are also referred to as external secondary coil-bar transformers.
  • the transformer core is electrically connected to no potential, so that the potential of the transformer core due to a capacitive coupling to a center potential between the ground potential and the generated high voltage potential.
  • the insulating material of the insulating jacket is at least locally heavily stressed by arranged in the vicinity of the insulating potential-carrying components.
  • a rod ignition coil is known in which one of the windings is designed as a helical winding.
  • the known Stabzündtransformatoren generally have the disadvantage that the insulating materials used are heavily loaded locally uneven. However, the insulation capacity of the insulating material and the thickness of the insulating material must be designed according to the maximum load occurring. In addition, in a skew winding of the primary winding and / or the secondary winding by design measures to prevent slippage of individual wires become. When skew winding only a portion of the cylindrical position of a coil winding is wound with a winding wire, which then on this Location produced further layer is not wrapped back to the beginning of the first layer. The subsequently wound on the second layer third layer has the same width as the first layer, so that it is arranged offset from the first layer.
  • skew windings are also referred to as crawl windings and are particularly useful in manuals for winding machines, e.g. from winding machines of the company Marsilli described.
  • the object of the invention is to provide a bar ignition transformer for supplying an ignition means, in particular a spark plug of an internal combustion engine, with a high voltage, in which the load of the insulating material for the isolation of the secondary coil is reduced.
  • a Stabzündtransformator for supplying an ignition means, in particular a spark plug of an internal combustion engine with high voltage ensures that in the range of large potential differences, a thicker insulating material is available than in areas with lower potential differences.
  • the insulating material for the isolation of the secondary coil is subjected to less stress than conventional Stabzündtransformatoren. Pointy heavy loads of the insulating material are avoided. These strong punctual loads are caused by large local potential differences, which are also referred to as hot spots. In areas of such hot spots, the insulating material is heavily stressed.
  • the insulation of the entire Stabzündtransformators is designed for these hot spots, so that in areas with lower potential differences more insulating material is present as for the isolation of high-voltage components of the pencil ignition coil is necessary.
  • the insulation material is heavily stressed, whereby the life of the insulating material especially at these hot spots is reduced by the stress.
  • a second aspect of the invention relates to an arrangement with a combined Zündtransformator- and Zündffenech, preferably for an internal combustion engine that operates on the Otto principle.
  • the arrangement has an ignition means which has an insulating body between a spark gap formed by means of electrodes and a high voltage terminal.
  • the cross section of the insulating material decreases at least in the region of the secondary winding of the ignition transformer with increasing distance from the electrodes of the ignition means.
  • the secondary winding and the primary winding of the ignition transformer are arranged concentrically to the longitudinal axis of the insulating material.
  • the insulating body serves as a bobbin for the secondary coil of the ignition transformer.
  • a conical design and arrangement of the secondary coil of the ignition transformer is achieved in a simple manner.
  • Fig. 1 a section of a known Stabzünd transformer is shown.
  • Such Stabzündtransformatoren are for example from the documents DE 199 12 376 C2 . DE 103 60 338 A1 . DE 109 211 A1 . DE 102 56 802 D3, DE 199 02 497 A1 . DE 199 27 820 C1 such as DE 136 528 A1 known.
  • a rod ignition transformer 10 is shown, which is designed for connection to a spark plug, not shown, wherein the Stabzündtransformator 10 in the region 12 has an opening for receiving a terminal portion of a spark plug. At least the lower portion of the Stabzündtransformators 10 is inserted into a provided in a cylinder head of an internal combustion engine shaft.
  • the rod-firing transformer 10 includes a substantially cylindrical rod core 14 formed of soft magnetic iron or a magnetic material and extending along the longitudinal axis 11 of the rod ignition transformer 10.
  • a secondary winding 16 is arranged on a bobbin coaxially around the rod core 14. A winding end of the secondary winding 16 is connected to the mass of the motor vehicle serving as a reference potential.
  • the other terminal of the secondary winding 16 is connected to a high voltage terminal 18 of a spark plug.
  • Fig. 1 are the potentials and the connections the coils and the spark plug is shown only schematically outside the Stabzündtransformators 10.
  • the spaces between the primary winding 22, the secondary winding 16 and the bobbin 18 are preferably with a Cast insulating material.
  • On the insulating housing 24 may be present a return plate, which forms a magnetic circuit of the Stabzündtransformators 10 as a return element with the rod core 14. If the rod core 14 is also connected to the ground potential, the secondary winding 16 must be insulated from the rod core 14 accordingly.
  • the bobbin 18 is made of a plastic, by which the secondary winding 16 is sufficiently insulated from the rod core 14.
  • a potting compound may be filled between the bobbin 18 and the rod core 14.
  • the secondary winding 16 is electrically insulated from the primary winding 22 by the casting compound filled between these windings 16, 22.
  • the secondary winding 16, the primary winding 22, the rod core 14 and / or the housing 24 may be electrically insulated with a thermoplastic and / or a thermosetting material.
  • the thermoplastic or thermoset material is preferably applied to the component to be insulated 16, 22, 14, 24 by a spraying method.
  • a relatively uniform potential distribution from one end of the secondary winding 16 to the other end of the secondary winding 16 can be achieved, whereby only in one area large potential differences between the rod core 14 and the secondary winding 16 and between the secondary winding 16 and the primary winding 22 occur.
  • the power output stage of the control unit 26 comprises a high-power transistor, which is operated as a switch.
  • high-power transistors are in particular bipolar transistors, MOSFETs and insulated gate bipolar transistors (IGBT).
  • IGBT insulated gate bipolar transistors
  • This voltage is supplied to the high voltage terminal 20 of a first electrode of the spark plug.
  • Another second electrode of the spark plug forming a spark gap with the first electrode is permanently connected to the ground potential.
  • an arc is generated between the two electrodes, which causes ignition of the combustion chamber located in the fuel-air mixture.
  • FIG. 2 an inventive Stabzündtransformator 30 is shown, their structure and operation similar to the Stabzündtransformator 10 after Fig. 1 is. Like elements have the same reference numerals.
  • the rod core 14 in the present embodiment has a circular cross-section and extends along the longitudinal axis of the Stabzündtransformators 30.
  • the secondary winding 32 is designed as a skew winding, wherein the winding process at the top of the in Fig. 2 shown secondary winding 32 has been started.
  • the secondary winding 32 and the primary winding 22 are arranged radially about the longitudinal axis 11 of the pencil ignition coil 30.
  • the radial cross section of the secondary winding 32 increases from the upper end of the secondary winding 32 to the lower end of the secondary winding 32 toward, so that the distance of the secondary winding 32 to the lateral surface of the rod core 14 from the upper end to the lower end of the secondary winding 32 increases continuously. As a result, the isolation distance between the The lateral surface of the rod core 14 and the secondary winding 32 increases continuously.
  • the potential distribution of the secondary winding 32 from the lower end to the upper end takes place substantially uniformly over the length of the secondary winding 32, so that ground potential is present at the lower end and high-voltage potential at the upper end.
  • the rod core 14 is electrically connected to the high voltage potential.
  • the potential difference is equal to the high voltage potential of the rod core 14, since this end of the secondary winding 32 is at ground potential.
  • the secondary winding 32 Due to the oblique arrangement of the secondary winding 32, however, a relatively large distance between the inside of the secondary winding 32 and the lateral surface of the rod core 14 at the lower end of the secondary winding 32 is present, which serves as an isolation distance. In this insulation distance, either air or another insulating material, in particular an insulating resin, may be present. The introduction of insulating gases in this space is possible.
  • the flow behavior of a potting compound in a vacuum potting process relative to the rod-firing transformer 10 is provided by the funnel-shaped gap between the secondary winding 32 and the primary winding 22 the rod ignition transformer 30 after Fig. 2 improved, whereby existing residual gases can better ascend from the spaces in the Stabzündtransformator 30.
  • oblique arrangement of the secondary winding 32 of the Stabzündtransformators 30 can be achieved with the same outer geometry functional advantages.
  • a higher high voltage more energy for generating the arc or the spark generated and / or the primary current can be reduced.
  • the life of the Stabzündtransformators 30 are extended by the oblique arrangement of the secondary winding 32 considerably in consequence of the lower stress of the insulating material.
  • the secondary winding 32 is designed as a skew winding, wherein the skew winding in the region with the smallest inner cross section of the secondary winding 32 is started, so that the winding direction of the skew winding is directed against the conicity of the secondary winding 32.
  • the Konizticianswinkel and the skew angle are added, whereby adjacent turns have a lower potential difference than, for example, in cylinder windings.
  • the lacquer insulation of the winding wires is thereby not stressed so much, whereby a longer life of the enameled wire insulation is achieved and the probability of Windungs finallyn is reduced. Furthermore, thereby slipping of wires in the skew winding is prevented.
  • FIG. 3 is a side view of a Stabzündtransformator spark plug combination 40 according to the invention shown.
  • the squib transformer spark plug combination 40 has an insulative housing 48, at the top thereof a hexagonal engagement portion 50 for threading the squib transformer spark plug combination 40 into a threaded opening in a cylinder head of a motor vehicle and for torquing the spark plug spark plug combination 40 with a prescribed torque is provided.
  • an opening for inserting a lead which electrically connects the rod transformer spark plug combination 40 to the control unit 26 for driving the rod transformer.
  • On the underside of the insulating housing 48 is an external thread 42 for screwing into a spark plug opening in the cylinder head of the motor vehicle over.
  • the outer thread 42 is preferably made of a metallic material, whereby the Stabzündtransformator spark plug combination 40 is preferably connected via this external thread 42 to the ground potential of the motor vehicle when the external thread 42 is screwed into the metallic cylinder head.
  • the counter electrode 46 is electrically connected to the external thread 42 and thus to the ground potential of the motor vehicle.
  • Fig. 4 is a sectional view of the Stabzündtransformator spark plug combination 40 along the section line AA after Fig. 3 shown.
  • a primary winding 52 is arranged on the inner wall of the insulating housing 48.
  • the high voltage electrode 44 is electrically connected to a transformer core 54, the transformer core 54 and the electrical connection between the transformer core 54 and the high voltage electrode 44 being surrounded by an insulating body 56, preferably made of ceramic or porcelain.
  • the Isolierstoff Chemistry 56 serves as a bobbin for the secondary winding 58.
  • the cross section of the Isolierstoff stresses 56 continuously decreases from the lower end of the secondary winding 58 to the upper end of the secondary winding 58 back, so that the distance between the lateral surface of the secondary winding 58th and the inside of the primary winding 52 increases continuously upward.
  • the potential of the secondary winding 58 continuously increases from the lower end of the secondary winding 58 to the upper end of the secondary winding 58.
  • the transformer core 54 is electrically connected to the high voltage potential of the secondary winding 58.
  • the primary winding 52 has Gleichstromograph considered ground potential or supply voltage potential of the motor vehicle, so that in the upper part of the secondary winding 58, a large potential difference between the primary winding 52 and secondary winding 58 and the lower portion of the secondary winding 58, a small potential difference between the secondary winding 58 and the primary winding 52 occurs.

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

Claims (14)

  1. Transformateur d'allumage en barre destiné à alimenter en haute tension un moyen d'allumage, en particulier une bougie d'allumage d'un moteur à combustion interne, dans lequel un premier enroulement (32) intérieur et un deuxième enroulement (22) extérieur sont disposés autour d'une zone principale de noyau (14) d'un noyau du transformateur, concentriquement à l'axe longitudinal (11) du transformateur d'allumage en barre (30),
    l'un des enroulements étant un enroulement primaire (22) et l'autre enroulement étant un enroulement secondaire (32),
    sachant que la distance entre la paroi latérale de la zone principale de noyau (14) et l'enroulement secondaire (32) au niveau d'une première extrémité de l'enroulement secondaire (32) est inférieure à la distance entre la paroi latérale de la zone principale de noyau (14) et l'enroulement secondaire (32) au niveau d'une deuxième extrémité de l'enroulement secondaire (32), et/ou que la distance entre la paroi latérale de la zone principale de noyau (14) et l'enroulement secondaire (32) au niveau d'une première extrémité du noyau de transformateur est inférieure à la distance entre la paroi latérale de la zone principale de noyau (14) et l'enroulement secondaire (32) au niveau de la deuxième extrémité de la zone principale de noyau (14) , et au moins l'enroulement secondaire (32) est réalisé sous la forme d'un enroulement en biais,
    caractérisé en ce que
    les enroulements en biais de l'enroulement secondaire (32) sont bobinés dans une direction opposée à l'inclinaison d'une face intérieure tronconique de l'enroulement secondaire (32), l'enroulement en biais commençant dans la zone avec la plus petite section intérieure de l'enroulement secondaire (32).
  2. Transformateur d'allumage en barre selon la revendication 1, caractérisé en ce qu'au moins l'enroulement secondaire (32) est bobiné de telle sorte que le potentiel dans l'enroulement secondaire (32) augmente sensiblement régulièrement depuis une extrémité axiale de l'enroulement secondaire (32) vers l'autre extrémité axiale de l'enroulement secondaire (32).
  3. Transformateur d'allumage en barre selon la revendication 1 ou 2, caractérisé en ce qu'au niveau de la première extrémité de l'enroulement secondaire (32) est appliqué un potentiel de référence, et au niveau de la deuxième extrémité de l'enroulement secondaire (32) est appliqué, au moins de temps en temps, un potentiel haute tension nécessaire pour générer une tension d'allumage, la zone principale (14) du noyau de transformateur étant reliée électriquement au potentiel haute tension.
  4. Transformateur d'allumage en barre selon l'une quelconque des revendications précédentes, caractérisé en ce que la zone principale de noyau (14) du noyau de transformateur possède une paroi latérale cylindrique, et en ce que les enroulements (22, 22) sont disposés sur des voies circulaires concentriques autour de l'axe longitudinal (11) de la zone principale de noyau (14), ledit noyau de transformateur étant de préférence un noyau de fer.
  5. Transformateur d'allumage en barre selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier enroulement est l'enroulement secondaire (32) et le deuxième enroulement est l'enroulement primaire (22), la distance entre l'enroulement secondaire (32) et l'enroulement primaire (22) au niveau de la deuxième extrémité de l'enroulement secondaire (32) étant inférieure à la distance entre l'enroulement secondaire (32) et l'enroulement primaire (22) au niveau de la première extrémité de l'enroulement secondaire (32), et/ou la distance entre l'enroulement secondaire (32) et l'enroulement primaire (22) au niveau d'une deuxième extrémité de l'enroulement primaire (22) étant inférieure à la distance entre l'enroulement secondaire (32) et l'enroulement primaire (22) au niveau de la première extrémité de l'enroulement primaire (22).
  6. Transformateur d'allumage en barre selon l'une quelconque des revendications précédentes, caractérisé en ce que le transformateur d'allumage en barre (30) comporte un carter (24) qui, au moins dans la zone de l'enroulement primaire (22) et de l'enroulement secondaire (32), est disposé sensiblement concentriquement autour de celles-ci, la distance entre l'enroulement secondaire (32) et la paroi latérale du carter (24) au niveau de la deuxième extrémité de l'enroulement secondaire (32) étant inférieure à la distance entre l'enroulement secondaire (32) et la paroi latérale du carter (24) au niveau de la première extrémité de l'enroulement secondaire (32).
  7. Transformateur d'allumage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un corps en matériau isolant (56) d'une bougie d'allumage est disposé à l'intérieur de l'enroulement secondaire (32), et ce corps en matériau isolant (56) comporte, au moins dans la zone de l'enroulement secondaire (32), une paroi latérale sensiblement tronconique, ledit corps en matériau isolant (56) étant de préférence un corps en céramique ou un corps en porcelaine.
  8. Transformateur d'allumage en barre selon la revendication 7, caractérisé en ce que le corps en matériau isolant (56) constitue un corps de bobine pour l'enroulement secondaire (32).
  9. Ensemble unitaire constitué par la combinaison d'un transformateur d'allumage et d'un moyen d'allumage, de préférence pour un moteur à combustion interne,
    comportant un moyen d'allumage, qui possède un corps en matériau isolant entre une trajectoire d'allumage, formée au moyen des électrodes (44, 46), et un branchement haute tension,
    la section du corps en matériau isolant (56) étant diminuée au moins dans la zone d'un enroulement secondaire (58) du transformateur d'allumage en s'éloignant progressivement des électrodes (44, 46) du moyen d'allumage en direction du branchement haute tension,
    l'enroulement secondaire (58) et l'enroulement primaire (52) du transformateur d'allumage étant tous deux disposés autour du corps en matériau isolant (56) concentriquement à l'axe longitudinal de celui-ci, et
    au moins l'enroulement secondaire (58) étant réalisé sous la forme d'un enroulement en biais,
    caractérisé en ce que les enroulements en biais de l'enroulement secondaire (58) sont bobinés dans une direction opposée à l'inclinaison d'une face intérieure tronconique de l'enroulement secondaire (58), l'enroulement en biais commençant dans la zone avec la plus petite section intérieure de l'enroulement secondaire (58).
  10. Ensemble unitaire selon la revendication 9, caractérisé en ce que le corps en matériau isolant (56) constitue un corps de bobine pour l'enroulement secondaire (58).
  11. Ensemble unitaire selon la revendication 9 ou 10, caractérisé en ce qu'à l'intérieur du corps en matériau isolant (56) est prévu un noyau de transformateur (14) magnétique doux, ledit corps en matériau isolant (56) étant de préférence un corps en céramique ou un corps en porcelaine.
  12. Ensemble unitaire selon l'une quelconque des revendications 9 à 11, caractérisé en ce qu'au moins dans une zone, une chemise magnétique (chemise de corps) est disposée autour de l'enroulement primaire et autour de l'enroulement secondaire, laquelle chemise est de préférence intégrée dans un carter de l'ensemble unitaire.
  13. Ensemble unitaire selon la revendication 12, caractérisé en ce qu'au moins une partie de la force à exercer pour visser ledit ensemble unitaire dans une ouverture ménagée dans la culasse d'un moteur à combustion interne, est transmise par l'intermédiaire de la chemise.
  14. Ensemble unitaire selon la revendication 12 ou 13, caractérisé en ce que la chemise magnétique, conjointement avec un noyau de transformateur du transformateur d'allumage, forme un circuit magnétique.
EP06778426A 2005-09-12 2006-09-12 Transformateur d'allumage en barre destine a alimenter en haute tension un moyen d'allumage, en particulier une bougie d'allumage d'un moteur a combustion interne Not-in-force EP1929490B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005043336A DE102005043336A1 (de) 2005-09-12 2005-09-12 Stabzündtransformator zur Versorgung eines Zündmittels, insbesondere einer Zündkerze einer Brennkraftmaschine, mit einer Hochspannung
PCT/EP2006/066281 WO2007031518A1 (fr) 2005-09-12 2006-09-12 Transformateur d'allumage en barre destine a alimenter en haute tension un moyen d'allumage, en particulier une bougie d'allumage d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1929490A1 EP1929490A1 (fr) 2008-06-11
EP1929490B1 true EP1929490B1 (fr) 2010-01-20

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EP06778426A Not-in-force EP1929490B1 (fr) 2005-09-12 2006-09-12 Transformateur d'allumage en barre destine a alimenter en haute tension un moyen d'allumage, en particulier une bougie d'allumage d'un moteur a combustion interne

Country Status (7)

Country Link
EP (1) EP1929490B1 (fr)
JP (1) JP2009508345A (fr)
CN (1) CN101305431B (fr)
AT (1) ATE456141T1 (fr)
DE (2) DE102005043336A1 (fr)
HK (1) HK1124955A1 (fr)
WO (1) WO2007031518A1 (fr)

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DE102012025082B3 (de) * 2012-08-31 2014-01-16 NorthCo Ventures GmbH & Co. KG Vorrichtung und Verfahren zur Behandlung von biologischem Gewebe mit einem Niederdruckplasma

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JP4019766B2 (ja) * 2002-04-01 2007-12-12 株式会社デンソー 内燃機関用点火装置およびその組み付け方法
DE10256802B3 (de) * 2002-12-05 2004-04-15 Robert Bosch Gmbh Stabzündspule
DE10360338A1 (de) * 2003-12-20 2005-07-14 Robert Bosch Gmbh Zündspule für einen Ottomotor und Verfahren zu deren Herstellung
DE102004003216B3 (de) * 2004-01-22 2005-08-25 Era Ag Zündspule für eine Brennkraftmaschine

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DE102005043336A1 (de) 2007-03-15
ATE456141T1 (de) 2010-02-15
CN101305431A (zh) 2008-11-12
EP1929490A1 (fr) 2008-06-11
CN101305431B (zh) 2010-10-27
JP2009508345A (ja) 2009-02-26
HK1124955A1 (en) 2009-07-24
DE502006005995D1 (de) 2010-03-11
WO2007031518A1 (fr) 2007-03-22

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