This application claims priority to DE 10 2018 130 504.4, filed Nov. 30, 2018, the entire disclosure of which is hereby incorporated herein by reference.
This disclosure relates to a primary coil former for an ignition coil, and also an ignition coil.
Ignition coils usually contain a primary coil former, on which a primary coil winding is wound. The two ends of the winding wire form the terminal connections of the primary coil. The direction of the magnetic field generated by the primary coil is determined by the winding direction of the primary coil and the current direction, that is to say, by which of the two ends of the winding is connected to potential, and which is connected to ground.
Automotive manufacturers usually specify to their suppliers which winding end is connected to ground and which winding end is connected to potential by means of an assignment of the pins of an electrical connector for the ignition coil. The winding direction of the coil must then be selected such that the desired magnetic field direction ensues with the specified pin assignment. Conventional primary coil formers can only be wound in one direction. A reversed pin assignment therefore requires a different primary coil former.
This disclosure teaches a primary coil former that can be wound with a primary coil winding in both the clockwise and anticlockwise directions.
According to this disclosure, the primary coil former for an ignition coil has a winding carrier surface configured for winding a primary coil winding onto, two primary winding stops which limit the winding carrier surface in the axial direction, and two holders arranged next to one another, each adapted to hold one end of the winding wire. These holders can be designed as notches or hooks, for example.
The primary coil former comprises two deflection domes at an end of the winding carrier surface facing away from the two holders and also a groove in the winding carrier surface for receiving a winding wire. This groove leads from one end of the winding carrier surface to a gap between the two deflection domes at the opposite end of the winding carrier surface. Depending on the desired winding direction, the winding wire is then led back to the winding carrier surface around one or the other deflection dome and is then wound around the winding carrier surface.
The deflection domes, with their rear faces facing towards the winding carrier surface, can be part of one of the two primary winding stops.
An advantageous refinement of this disclosure comprises a third holder for a winding wire end. By using the central holder and one of the two outer holders, additional freedom can be gained for the spatial arrangement of a connector.
The above-mentioned aspects of exemplary embodiments will become more apparent and will be better understood by reference to the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:
The embodiments described below are not intended to be exhaustive or to limit the invention to the precise forms disclosed in the following description. Rather, the embodiments are chosen and described so that others skilled in the art may appreciate and understand the principles and practices of this disclosure.
The primary coil former also comprises at least two holders 5, 6 arranged next to one another at a first end of the winding carrier surface 1. The holders 5, 6 are configured to each hold one end 7, 8 of the winding wire. The holders 5, 6 can, for example, be designed as notches, hooks or the like. In the example shown, three such holders 5, 6, 9 are arranged next to one another outside the winding carrier surface 1.
The primary winding stop 3 that faces towards the holders 5, 6, 9 has two passages 11, 12 for the ends 7, 8 of the winding wire. From one of these two passages 11, 12, a groove 13 leads through the entire winding carrier surface 1 to the deflection domes 14, 15 at a second end of the winding carrier surface 1. The rear faces of the deflection domes 14, 15, facing towards the winding carrier surface 1, form part of the corresponding primary winding stop 4. The groove 13 ends between the two deflection domes 14, 15. The winding wire is led from one of the holders 6, through the corresponding passage 12 of the primary winding stop 3, in the groove 13 through the gap between the two deflection domes 14, 15, and is then, depending on the desired winding direction, curved around one or the other deflection dome 14, 15, and thus led back to the winding carrier surface 1. The winding wire is then wound around the winding carrier surface 1 until the other end of the winding wire then passes through the second passage 11 of the primary winding stop 3 facing towards the holders 5, 6, 9. This end 7 of the primary winding wire is then fixed in the relevant holder 5 or 9.
The primary coil former can be hollow, so to accommodate a core made up, for example, from iron sheets.
While exemplary embodiments have been disclosed hereinabove, the present invention is not limited to the disclosed embodiments. Instead, this application is intended to cover any variations, uses, or adaptations of this disclosure using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims.
Number | Date | Country | Kind |
---|---|---|---|
10 2018 130 504.4 | Nov 2018 | DE | national |
Number | Name | Date | Kind |
---|---|---|---|
6332458 | Shimada et al. | Dec 2001 | B1 |
6571784 | Shimada et al. | Jun 2003 | B2 |
6897755 | Wada | May 2005 | B2 |
7013883 | Shimada et al. | Mar 2006 | B2 |
7487767 | Shimada | Feb 2009 | B2 |
20020026929 | Shimada et al. | Mar 2002 | A1 |
20060129890 | Shimada et al. | Jun 2006 | A1 |
20080136286 | Hiramatsu | Jun 2008 | A1 |
20080309445 | Suzuki | Dec 2008 | A1 |
20110043315 | Kobayashi | Feb 2011 | A1 |
20170200548 | Takagi | Jul 2017 | A1 |
20190259523 | Spath | Aug 2019 | A1 |
20220262561 | Bayliss, III | Aug 2022 | A1 |
Number | Date | Country |
---|---|---|
698 12 350 | Nov 2003 | DE |
20 2009 001 658 | Apr 2009 | DE |
Number | Date | Country | |
---|---|---|---|
20200176180 A1 | Jun 2020 | US |