Spark developing apparatus for internal combustion engines

摘要

Apparatus for developing and applying sparks to the combustion chamber of an internal combustion engine. The apparatus comprises separate primary and secondary winding units. The secondary unit includes a spark plug having an insulator. The insulator carries a secondary coil winding which is connected to the electrodes of the spark plug. The insulator has a bore which contains a magnetic core for the secondary winding. The primary winding unit includes a primary winding and a tubular flux carrying part formed of magnetic material. The primary winding unit has a bore which is slipped over a portion of the secondary unit that has the secondary winding. A voltage is induced in the secondary winding by magnetic coupling to the primary winding when it is energized.