Method and apparatus to control an ignition system
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United States of America Patent
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Apr 17, 2018
Grant Date -
Oct 13, 2016
app pub date -
Nov 11, 2014
filing date -
Nov 14, 2013
priority date (Note) -
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Abstract
A method is provided for controlling an ignition system which includes a spark plug control unit adapted to control at least one coil stage, the at least one coil stage adapted to successively energize and de-energize to provide a current to a spark plug, each coil stage includes a primary winding inductively coupled to a secondary winding. The method includes measuring low side voltages at one or more of each coil stage and controlling a duty cycle or a pulse width of a PWM-signal of a step-down converter stage dependent on a battery voltage, a maximum primary current threshold, and the measured voltages.
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