Method and apparatus to control an ignition system
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United States of America Patent
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Nov 24, 2020
Grant Date -
May 30, 2019
app pub date -
Apr 10, 2017
filing date -
Apr 13, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
An ignition system includes a controller which controls two stages—to provide current to a spark plug. The stages include a first transformer including a first primary winding and a first secondary winding and a second transformer including a second primary winding and a second secondary winding. A switch is electrically connected between a supply high side and the high side of the first primary winding. A second switch is electrically connected between the first primary winding and the power supply low side supply. A third switch is connected between the junction of the switch and high side end of the first inductor and a point between the low side of the second primary winding and low side supply. A fourth switch is located between the low side of the second primary winding and the point. A fifth switch is located between the point and low side supply.
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