| US 9,812,248 B2 | ||
| Ignition coil | ||
| Albert A. Skinner, Waterford, MI (US); Colin Hamer, Noblesville, IN (US); and Harry O. Levers, Jr., Clarkston, MI (US) | ||
| Assigned to DELPHI TECHNOLOGIES, INC., Troy, MI (US) | ||
| Filed by DELPHI TECHNOLOGIES, INC., Troy, MI (US) | ||
| Filed on Jun. 15, 2015, as Appl. No. 14/739,094. | ||
| Claims priority of provisional application 62/012,557, filed on Jun. 16, 2014. | ||
| Prior Publication US 2015/0364246 A1, Dec. 17, 2015 | ||
| Int. Cl. H01F 27/29 (2006.01); H01F 27/32 (2006.01); H01F 38/12 (2006.01); H01F 5/02 (2006.01) | ||
| CPC H01F 27/325 (2013.01) [H01F 27/29 (2013.01); H01F 38/12 (2013.01); H01F 2005/025 (2013.01)] | 14 Claims |
| 1. An ignition coil for delivering a spark-generating current to a spark plug; said ignition coil comprising:
a magnetically-permeable core;
a primary winding disposed outward of said core; and
a secondary winding radially surrounding said primary winding and inductively coupled to said primary winding, said secondary
winding having a low-voltage end and a high-voltage end;
wherein said secondary winding includes a secondary winding first section proximal to said low-voltage end and having a secondary
winding first thickness and wherein said secondary winding also has a secondary winding second section proximal to said high-voltage
end and having a secondary winding second thickness that is less than said secondary winding first thickness.
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