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
OG exemplary drawing
 
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.