Ignition circuit
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United States of America Patent
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-
Dec 13, 2016
Grant Date -
Jun 13, 2013
app pub date -
Dec 6, 2012
filing date -
Dec 7, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An ignition circuit for a combustion engine has an ignition coil and a control unit for the coil. The coil and the control unit are included in a common component as an ignition module. The module is supplied with voltage by a generator driven by the engine. A spark plug and the coil form a power circuit which includes a line segment to a reference potential outside the module. A sensor detects data of the engine and the output of the sensor is supplied to the module. The sensor is supplied with voltage via a sensor circuit. The sensor circuit and the power circuit use the line segment as a common connection to the reference potential, so that for a defect of the line segment, a missing connection to the reference potential in the high voltage circuit is recognized via the change of the sensor output signals.
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