It is possible to adjust electromagnetic energy introduced from a low-voltage side of a primary winding 20 of an ignition coil 2 after start discharging to a spark plug 1 from the ignition coil 2 in the correct proportion by threshold-determining either on...

An ignition unit (11) has a superimposed voltage generation circuit (17) that feeds, between electrodes of an ignition plug (9), a superimposed voltage of the same direction as a discharge voltage, and in an operation range wherein an engine rotation speed...

A method of manufacturing a semiconductor apparatus according to the invention includes the steps of: coating solder 31 on an predetermined area in the upper surface of lead frame 30; mounting chip 32 on solder 31; melting solder 31 with hot plate 33 for b...

The present invention relates to a method of controlling the spark current in a spark plug (8), comprising a voltage source (1; 14), an ignition system (2) connected to the voltage source, and a spark plug (8) connected to the ignition system, which igniti...