Spark developing apparatus for internal combustion engines
This patent describes an apparatus for developing sparks to ignite the combustible mixture in a cylinder of an internal combustion engine. It comprises: an internal combustion engine having a cylinder, a secondary spark developing unit comprising a spark plug supported by the engine having a pair of electrodes associated with the cylinder. The spark plug having first insulator means for supporting and for electrically insulating the electrodes from each other and having second insulator means extending axially of the first insulator means. The second insulator means having a bore, a core formed of a magnetic material located within the bore, a secondary coil winding carried by the second insulator means and disposed about the core. The opposite ends of the secondary winding being electrically connected respectively to the electrodes, means for causing a voltage to be induced in the secondary winding which is high enough to cause an arc to be developed across the electrodes comprising a primary winding unit that is a part that is separate from the secondary spark developing unit, aid primary winding unit having a bore, and means for supporting the primary winding unit relative to the secondary spark developing unit.
- Assignee:
- General Motors Corp., Detroit, MI
- Patent Number(s):
- US 4903674; A
- Application Number:
- PPN: US 7-322374A
- OSTI ID:
- 6838862
- Country of Publication:
- United States
- Language:
- English
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