Ignition system
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United States of America Patent
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Jul 12, 2016
Grant Date -
Dec 18, 2014
app pub date -
Jun 9, 2014
filing date -
Jun 13, 2013
priority date (Note) -
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Abstract
An ignition system including: a first control unit configured to generate a high voltage that is to be supplied to a spark plug at a secondary winding of an ignition coil by applying and then cutting off a primary current to a primary winding of the ignition coil; a second control unit configured to cut off electric power supplied from the secondary winding to the spark plug by energizing the primary winding after the first control unit cuts off the primary current; a re-energizing current measuring unit configured to measure a re-energizing current energizing the primary winding by the second control unit; and an energizing period determining unit configured to determine an energizing period during which the primary current is applied to the primary winding by the first control unit, corresponding to the re-energizing current measured by the re-energizing current measuring unit.
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