WO2015151800A1 - Bobine d'allumage pour moteur à combustion interne - Google Patents

Bobine d'allumage pour moteur à combustion interne Download PDF

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Publication number
WO2015151800A1
WO2015151800A1 PCT/JP2015/057857 JP2015057857W WO2015151800A1 WO 2015151800 A1 WO2015151800 A1 WO 2015151800A1 JP 2015057857 W JP2015057857 W JP 2015057857W WO 2015151800 A1 WO2015151800 A1 WO 2015151800A1
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WO
WIPO (PCT)
Prior art keywords
coil
outer peripheral
core
ignition coil
combustion engine
Prior art date
Application number
PCT/JP2015/057857
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English (en)
Japanese (ja)
Inventor
常永　孝二
Original Assignee
株式会社デンソー
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 株式会社デンソー filed Critical 株式会社デンソー
Publication of WO2015151800A1 publication Critical patent/WO2015151800A1/fr

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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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support

Definitions

  • the present invention relates to an ignition coil for an internal combustion engine.
  • An ignition coil used for an internal combustion engine such as an engine includes, for example, a primary coil and a secondary coil arranged concentrically on the inner and outer circumferences, and a central core arranged at an axial center position of the primary coil and the secondary coil, An outer peripheral core or the like disposed on the outer peripheral side of the primary coil and the secondary coil is provided. These components are housed in a case, and a gap formed in the case is filled with a filling resin made of a thermosetting resin such as an epoxy resin.
  • Patent Literature 1 discloses an ignition coil including a bottomed cylindrical case that opens on one side in the axial direction of the central core and closes the other side.
  • the outer peripheral core of the ignition coil has a connecting portion provided on the opening side of the case, and side portions formed so as to connect both ends of the connecting portion and both ends of the central core.
  • the ignition coil disclosed in Patent Document 1 has the following problems.
  • a gap in the winding is filled with a resin having electrical insulation.
  • the resin is filled into the case in a negative pressure state.
  • the connecting portion of the outer peripheral core is disposed on the opening side of the case, when the air and the filling resin are replaced in the case, the movement of the air is inhibited by the connecting portion, and the opening portion of the case It becomes difficult to come out of the case. Therefore, air tends to stay inside the outer core. Thereby, voids (bubbles) are formed in the filled resin. This void tends to be a starting point of a crack and may cause an insulation failure.
  • the present invention has been made in view of such a background, and an object of the present invention is to provide an ignition coil for an internal combustion engine that is excellent in reliability by suppressing formation of voids in a filling resin filled in a case. .
  • One aspect of the present invention is a primary coil formed by winding a primary winding around an axis parallel to a horizontal plane; A secondary coil formed by winding a secondary winding around the axis at a position on the outer peripheral side of the primary coil; A central core inserted and arranged along the axial direction of the axis inside the primary coil and the secondary coil; An outer peripheral core disposed on the outer peripheral side of the primary coil and the secondary coil; A case for housing the primary coil, the secondary coil, the central core and the outer core; And having a filling resin with electrical insulation filled in the case,
  • the case is provided on a side wall portion that is formed so as to surround the primary coil, the secondary coil, the center core, and the outer peripheral core and that is open upward in the vertical direction, and on a lower side of the side wall portion.
  • the outer peripheral core has a pair of side portions formed upward from both ends in the axial direction, and a connection portion that connects upper end portions of the pair of side portions, At least a part of the lower surface of the connection portion has a lower side as it goes from one end to the other end in either or both of the vertical direction, the lateral direction orthogonal to the axial direction, and the axial direction.
  • An ignition coil for an internal combustion engine having an inclined surface that is inclined to face.
  • the connection portion On the lower surface of the connection portion, there is an inclined surface that is inclined downward from one end of the lower surface to the other end in either or both of the lateral direction and the axial direction. Is formed. That is, the inclined surface is inclined so that the end of the lower surface becomes the upper end.
  • the bubbles in the filling resin float upwards below the connecting portion of the outer peripheral core.
  • the bubbles move along the inclined surface. And it moves to the outer side of the said connection part, and is discharged
  • the air inside the said outer periphery core can be discharged
  • the formation of voids in the filled resin filled in the case can be suppressed, and the reliability can be improved.
  • FIG. 1 is a cross-sectional explanatory view taken along the line II-II in FIG. 1.
  • Sectional explanatory drawing which shows the example of a shape of the ignition coil in Example 2.
  • FIG. Sectional explanatory drawing which shows the other example of a shape of the ignition coil in Example 2.
  • FIG. Sectional explanatory drawing which shows the ignition coil in Example 3.
  • FIG. Sectional explanatory drawing which shows the example of a shape of the ignition coil in Example 4.
  • FIG. Sectional explanatory drawing which shows the ignition coil in Example 5.
  • FIG. Sectional explanatory drawing which shows the ignition coil in Example 6.
  • the vertical direction refers to the same direction as the direction in which gravity works
  • the horizontal plane refers to the top surface of the filled resin in a plane perpendicular to the vertical direction.
  • the inclined surface is preferably inclined at least in the lateral direction.
  • the bubbles in the filling resin are easily moved to the outside of the connection portion. Thereby, the bubbles in the filling resin can be easily discharged to the outside of the case.
  • the inclination angle ⁇ of the inclined surface with respect to the horizontal plane is preferably 0.5 ° ⁇ ⁇ ⁇ 15 °. If the inclination angle ⁇ is within this range, the bubbles contained in the filled resin can easily move along the inclined surface. Further, the outer peripheral core can be downsized in the vertical direction, and thus the ignition coil can be downsized.
  • the outer peripheral core includes a laminate in which a plurality of magnetic steel plates are laminated, and a coating layer having electrical insulation covering the circumference of the laminate, and the laminate is along the inclined surface. It is preferable to have the formed layered inclined portion. In this case, the cross-sectional area of the laminate can be increased and the performance of the ignition coil can be improved.
  • the lower surface of the connection portion in the outer peripheral core is inclined so as to be directed upward from the low voltage side end portion to the high voltage side end portion in the secondary coil.
  • the distance between the connection portion and the secondary coil can be increased from the low voltage side toward the high voltage side.
  • Example 1 An embodiment of the ignition coil for the internal combustion engine will be described with reference to FIGS.
  • the ignition coil 1 is filled in the primary coil 11, the secondary coil 12, the central core 13, the outer core 2, the case 3 that accommodates these, and the case 3.
  • a filling resin 4 having electrical insulation.
  • the primary coil 11 is formed by winding a primary winding around the axis 110, and the secondary coil 12 is wound around the axis 110 at a position on the outer peripheral side of the primary coil 11. Is formed.
  • the central core 13 is disposed inside the primary coil 11 and the secondary coil 12 along the axial direction X of the axis 110, and the outer core 2 is disposed on the outer peripheral side of the primary coil 11 and the secondary coil 12. ing.
  • the case 3 is formed so as to surround the primary coil 11, the secondary coil 12, the central core 13, and the outer core 2, and has a side wall portion 31 that opens upward, and a bottom portion 32 that is provided at the lower end of the side wall portion 31. And have.
  • the outer peripheral core 2 has a pair of side portions 21 formed upward from both ends in the axial direction X of the central core 13 and a connection portion 22 that connects upper ends of the pair of side portions 21. Yes.
  • At least a part of the lower surface of the connecting portion 22 is formed with an inclined surface 23 that is inclined upward as it goes from one end portion in the vertical direction Z and the lateral direction Y perpendicular to the axial direction X to the other end portion. ing.
  • the direction orthogonal to the horizontal plane is defined as the up-down direction Z, and the direction in which the central core 13 disposed inside the primary coil 11 is inserted is described as the axial direction X.
  • a direction orthogonal to both the vertical direction Z and the axial direction X will be described as the horizontal direction Y.
  • the opening side in the side wall part 31 is made into upper direction, and the other side is demonstrated as the downward direction.
  • the ignition coil 1 of this example is used in an automobile internal combustion engine to apply a high voltage to an ignition plug disposed with an electrode exposed in a combustion chamber.
  • the ignition coil 1 is configured such that a high voltage is induced in the secondary coil 12 as the current in the primary coil 11 changes.
  • the case 3 includes a side wall portion 31 that surrounds the primary coil 11, the secondary coil 12, the center core 13, and the outer core 2, and that opens upward, and the side wall portion 31. And a bottom portion 32 provided at the lower end.
  • a connector insertion portion 311 is formed on the side wall portion 31 along the axial direction X of the central core 13.
  • a connection terminal electrically connected to the igniter 6 is provided inside the connector insertion portion 311. 61 is arranged.
  • a tower portion 321 extending downward is formed on the bottom portion 32, and is electrically connected to the inner side of the tower portion 321 via the secondary coil 12 and the high-voltage connection terminal 71.
  • the high-voltage terminal 7 is inserted.
  • the tower part 321 is press-fitted inside a plug cap (not shown).
  • the primary coil 11 of the ignition coil 1 is formed by winding a primary winding around the outer periphery of the primary spool 51.
  • the primary spool 51 is formed of an insulating resin, and includes a cylindrical main body portion 511 and a pair of flange portions 512 erected from both ends in the axial direction X of the main body portion 511 toward the outer peripheral side. By winding a primary winding between a pair of flanges 512 in the primary spool 51, the cylindrical primary coil 11 is formed.
  • the secondary coil 12 is formed by winding a secondary winding around the secondary spool 52.
  • the secondary spool 52 is coaxial with the primary spool 51 and is disposed on the outer peripheral side of the primary spool 51. Further, the secondary spool 52 has a cylindrical main body 521 and a plurality of flanges 522 erected from the outer peripheral surface of the main body 521 toward the outer peripheral side. The plurality of flanges 522 are arranged at equal intervals in the axial direction X of the main body 521.
  • the secondary coil 12 is formed by winding a secondary winding between the adjacent flanges 522.
  • the central core 13 is provided inside the primary spool 51.
  • the central core 13 has a substantially quadrangular prism shape formed by laminating a plurality of magnetic steel plates in the vertical direction Z.
  • the central core 13 is arranged such that its longitudinal direction is the same as the axial direction X of the primary spool 51.
  • the outer peripheral core 2 is provided on the outer peripheral side of the secondary spool 52.
  • the outer peripheral core 2 has a laminated body 201 in which a plurality of magnetic steel plates subjected to press working are laminated, and a coating layer 203 made of an insulating resin that covers the outer circumference of the laminated body 201.
  • the outer peripheral core 2 is a connection formed so as to connect a pair of side portions 21 extending parallel to each other upward from both ends in the axial direction X of the central core 13 and upper ends of the side portions 21. Part 22. Between one side portion 21 and one end of the central core 13, a magnet 24 is provided for generating a magnetic flux in the direction opposite to the magnetic flux generated in the primary coil 11 in the magnetic path.
  • the lower surface of the connecting portion 22 forms an inclined surface 23 that is inclined with respect to the horizontal plane in the lateral direction Y.
  • the inclined surface 23 of the present example is formed on the entire lower surface of the connecting portion 22 so as to be inclined downward from the one end 231 in the lateral direction Y toward the other end 232.
  • the stacked body 201 in the cross section orthogonal to the axial direction X in the connection portion 22, has a rectangular shape whose lower surface is parallel to the horizontal plane, and the inclined surface 23 is formed by inclining the coating layer 203.
  • the inclination angle ⁇ of the inclined surface 23 with respect to the horizontal plane is set to 0.5 °.
  • the upper surface of the filling resin 4 is formed substantially parallel to the horizontal plane, and the inclination angle ⁇ of the inclined surface 23 with respect to the upper surface of the filling resin 4 is also 0.5 °. Further, FIG. 1 shows the inclination angle of the inclined surface 23 exaggerated.
  • a case 3 containing components such as a primary coil 11, a secondary coil 12, a center core 13, and an outer core 2 is filled with an epoxy resin that is a thermosetting resin.
  • Resin 4 is filled. The filling resin 4 fixes these components in an insulated state in the case 3.
  • an inclined surface 23 that is inclined downward from the one end 231 in the lateral direction Y toward the other end 232 side is formed on the lower surface of the connection portion 22. That is, the inclined surface 23 is inclined so that the end 231 becomes the upper end.
  • the case 3 is filled with the filling resin 4
  • the bubbles in the filling resin 4 are lifted upward below the connection portion 22 of the outer peripheral core 2.
  • the bubbles move along the inclined surface 23. Then, it moves to the outside of the connecting portion 22 and is discharged to the outside of the case 3. Thereby, the air inside the outer periphery core 2 can be discharged
  • the inclination angle ⁇ of the inclined surface 23 with respect to the horizontal plane satisfies the relationship of 0.5 ° ⁇ ⁇ ⁇ 15 °. For this reason, the bubbles contained in the filling resin 4 are easily moved along the inclined surface 23. Further, the outer core 2 can be downsized in the vertical direction Z, and the ignition coil 1 can be downsized.
  • the ignition coil 1 for an internal combustion engine of the present example formation of voids in the filled resin filled in the case 3 can be suppressed, and reliability can be improved.
  • Example 2 In this example, the configuration of the ignition coil 1 according to the first embodiment is partially changed. As shown in FIG. 3 and FIG. 4, the ignition coil 1 of the present example changes the shape of the lower surface of the connection portion 22 of the outer core 2.
  • Two inclined surfaces 23 are formed on the lower surface of the connecting portion 22 in the outer peripheral core 2 of the ignition coil 1 shown in FIG. In the lateral direction Y, the two inclined surfaces 23 are formed such that the center is the lowest point 233 and is inclined downward toward the lowest point 233 from both end portions 231 and 232 of the lower surface.
  • An inclined surface 23 made of a curved surface is formed on the lower surface of the connecting portion 22 in the outer peripheral core 2 of the ignition coil 1 shown in FIG. In the horizontal direction Y, the inclined surface 23 is formed so as to be an arcuate end surface having the center as the lowest point and going downward from both ends of the lower surface toward the lowest point.
  • Other configurations are the same as those of the first embodiment.
  • the same reference numerals as those used in the first embodiment represent the same components as in the first embodiment unless otherwise specified. Also in this example, it is possible to obtain the same effect as that of the first embodiment.
  • Example 3 In this example, as shown in FIG. 5, the structure of the outer peripheral core in the ignition coil of Example 1 is changed.
  • the laminated body 201 of the outer peripheral core 2 in the ignition coil 1 of this example forms a laminated inclined portion 202 by combining magnetic steel plates having different width dimensions in the lateral direction Y.
  • the laminated body 201 includes a uniform cross-section portion 221 in which magnetic steel plates having a constant width dimension in the transverse direction Y are laminated, and a magnetic steel plate formed so that the width dimension decreases sequentially from the lower surface of the uniform cross-section portion 221 downward. And an inclined cross-sectional portion 222 in which are stacked.
  • the magnetic steel plate of the inclined cross section 222 is arranged so that the end on the end 232 side is aligned with the end on the end 232 side in the uniform cross section 221.
  • the stacked inclined portion 202 is formed so as to be inclined downward as it goes from the end portion 231 to the end portion 232.
  • the covering layer 203 covers the stacked body 201 so as to form the inclined surface 23 parallel to the surface connecting the convex corners in the stacked inclined portion 202.
  • Other configurations are the same as those of the first embodiment.
  • the same reference numerals as those used in the first embodiment represent the same components as in the first embodiment unless otherwise specified.
  • the performance of the ignition coil 1 can be improved by increasing the cross-sectional area of the laminate 201. Also in this example, the same effects as those of the first embodiment can be obtained.
  • Example 4 In this example, as shown in FIG. 6, the structure in the ignition coil 1 of Example 3 is partially changed.
  • the laminated body 201 of the outer peripheral core 2 in the ignition coil 1 of this example forms two laminated inclined portions 202.
  • the magnetic steel plates constituting the inclined cross section 222 are laminated so that the central position of the magnetic steel plates is the same as the central position of the uniform cross section 221 in the lateral direction Y.
  • the stacked inclined portion 202 is inclined so as to go downward from both end portions 231 and 232 of the lower surface toward the lowest point 233.
  • Example 5 In this example, as shown in FIG. 8, the structure of the ignition coil of Example 1 is partially changed.
  • the connecting portion 22 of the outer peripheral core 2 in the ignition coil 1 of this example is directed upward in the axial direction X from the end on the low voltage side L of the secondary coil 12 toward the end on the high voltage side H. Inclined.
  • the side of the secondary coil 12 to which the high voltage connection terminal 71 is connected is the high voltage side H, and the side opposite to the high voltage side H is the low voltage side L.
  • Other configurations are the same as those of the first embodiment.
  • the same reference numerals as those used in the first embodiment represent the same components as in the first embodiment unless otherwise specified.
  • the filling resin 4 filled between the secondary coil 12 and the outer core 2 is increased by increasing the distance between the high voltage side H of the secondary coil 12 and the outer core 2.
  • the thickness can be increased and the electrical insulation performance can be improved.
  • the same effects as those of the first embodiment can be obtained.
  • Example 6 shows an example in which the structure of the ignition coil 1 according to the first embodiment is partially changed as shown in FIG.
  • the cross-sectional shape of the connecting portion 22 in a cross section orthogonal to the axial direction is a substantially rectangular shape arranged so that opposing sides are parallel to each other.
  • the pair of side portions 21 are formed along a direction orthogonal to the lower surface of the connection portion 22.
  • the outer peripheral core 2 is disposed in a state where the entire outer core 2 is inclined in the lateral direction Y. Thereby, the inclined surface 23 in which the lower surface of the connecting portion 22 arranged at an inclination is inclined with respect to the horizontal plane is formed.
  • Other configurations are the same as those of the first embodiment.
  • the same reference numerals as those used in the first embodiment represent the same components as in the first embodiment unless otherwise specified.
  • the lower surface of the connecting portion 22 can be used as the inclined surface 23 by using the outer peripheral core 2 that does not form the inclined surface 23 that has been conventionally used. Therefore, it is not necessary to change the shape of the outer peripheral core 2, and generation of voids in the filled resin 4 can be easily suppressed. In addition, the same effects as those of the first embodiment can be obtained.
  • Example 7 In this example, as shown in FIG. 10, the structure in the ignition coil of Example 1 is partially changed.
  • the cross-sectional shape of the connecting portion 22 in a cross section orthogonal to the axial direction is a substantially rectangular shape arranged so that opposing sides are parallel to each other.
  • the pair of side portions 21 are formed along a direction orthogonal to the lower surface of the connection portion 22. Therefore, the shape of the outer core 2 is the same as that shown in Example 6 above.
  • the outer peripheral core 2 is disposed such that the lower surface of the connection portion 22 is parallel to the bottom portion 32 of the case 3. Therefore, it is arranged so as to be orthogonal to the coil axis direction Z ⁇ b> 1 that is a direction orthogonal to the bottom portion 32.
  • the fixing jig 8 includes a pedestal portion 81, a column portion 82 erected upward in the vertical direction Z from the pedestal portion 81, and a placement portion 83 on which the ignition coil 1 is held.
  • the placement portion 83 is disposed so as to be inclined in the lateral direction Y.
  • the mounting portion 83 has a through hole 831 formed so as to penetrate therethrough, and when the ignition coil 1 is mounted on the mounting portion 83, the tower portion 321 is inserted into the through hole 831.
  • the ignition coil 1 When the ignition coil 1 is held by the mounting portion 83 of the fixing jig 8, the ignition coil 1 is inclined in the lateral direction Y with respect to the horizontal plane with reference to the mounting portion 83 on which the bottom portion 32 is mounted.
  • the connection part 22 in the outer periphery core 2 inclines in the horizontal direction Y with respect to a horizontal surface, and the lower surface of the connection part 22 forms the inclined surface 23 inclined in the horizontal direction Y.
  • Other configurations are the same as those of the first embodiment.
  • the same reference numerals as those used in the first embodiment represent the same components as in the first embodiment unless otherwise specified.
  • the inclined surface 23 can be formed by inclining the ignition coil 1. Therefore, the generation of voids in the filling resin 4 can be easily suppressed without changing the design of the ignition coil 1. Also in this example, the same effects as those of the first embodiment can be obtained.

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

Abstract

Une bobine d'allumage (1) comprend les éléments suivants : une bobine primaire (11); une bobine secondaire (12); un noyau central (13); un noyau périphérique extérieur (2) ; un boîtier (3) qui loge ce qui précède; et une résine avec charge (4) présentant des propriétés d'isolation électrique qui remplit le boîtier (3). Le noyau périphérique extérieur (2) comporte les éléments suivants: une paire de pièces latérales (21) formée en s'étendant vers le haut, depuis les deux extrémités dans la direction axiale X du noyau central (13) ; et une partie de raccordement (22) qui relie les extrémités supérieures de la paire de pièces latérales (21). Au moins au niveau d'une partie de la face inférieure de la partie de raccordement (22), une surface inclinée (23) est formée de manière à être inclinée vers le haut, d'une extrémité à l'autre extrémité, dans la direction latérale Y qui est orthogonale à la direction verticale Z et à la direction axiale X.
PCT/JP2015/057857 2014-04-04 2015-03-17 Bobine d'allumage pour moteur à combustion interne WO2015151800A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014077802A JP6369100B2 (ja) 2014-04-04 2014-04-04 内燃機関用の点火コイル
JP2014-077802 2014-04-04

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WO2015151800A1 true WO2015151800A1 (fr) 2015-10-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018130492A1 (de) * 2018-11-30 2020-06-04 Borgwarner Ludwigsburg Gmbh Zündspule

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6807937B2 (ja) * 2016-09-28 2021-01-06 三菱電機株式会社 点火コイル
CN108630416A (zh) * 2017-03-24 2018-10-09 金刚石电机株式会社 内燃机用点火线圈

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02174206A (ja) * 1988-12-27 1990-07-05 Nippondenso Co Ltd 内燃機関用点火コイル
JP2009033112A (ja) * 2007-07-04 2009-02-12 Denso Corp 点火コイル
JP2013026560A (ja) * 2011-07-25 2013-02-04 Diamond Electric Mfg Co Ltd 内燃機関用の点火コイル
JP2013239633A (ja) * 2012-05-16 2013-11-28 Diamond Electric Mfg Co Ltd 内燃機関用の点火コイル

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02174206A (ja) * 1988-12-27 1990-07-05 Nippondenso Co Ltd 内燃機関用点火コイル
JP2009033112A (ja) * 2007-07-04 2009-02-12 Denso Corp 点火コイル
JP2013026560A (ja) * 2011-07-25 2013-02-04 Diamond Electric Mfg Co Ltd 内燃機関用の点火コイル
JP2013239633A (ja) * 2012-05-16 2013-11-28 Diamond Electric Mfg Co Ltd 内燃機関用の点火コイル

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018130492A1 (de) * 2018-11-30 2020-06-04 Borgwarner Ludwigsburg Gmbh Zündspule
US11195654B2 (en) 2018-11-30 2021-12-07 Borgwarner Ludwigsburg Gmbh Ignition coil
DE102018130492B4 (de) 2018-11-30 2023-02-09 Borgwarner Ludwigsburg Gmbh Zündspule

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JP2015201478A (ja) 2015-11-12

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