Control apparatus of an ignition spark plug and engine electronic ignition system having open secondary protection
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United States of America Patent
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Oct 18, 2016
Grant Date -
Jul 3, 2014
app pub date -
Dec 5, 2013
filing date -
Jan 3, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A control apparatus of an engine ignition spark plug includes a switch having a control terminal and an output terminal connected to an external transformer. The switch assumes a closed state for supplying energy to the transformer, and an open state for the transformer to supply energy to the spark plug. A measuring module measures a time duration where, in the open state, a voltage at the output terminal of the switch decreases from a first value to a second value. A detecting module detects an operating condition of the spark plug based on comparing the measured time duration to a time threshold, and to generate a detecting signal based on the comparing.
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