Ignition apparatus of internal combustion engine
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United States of America Patent
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Issued Date -
Jul 11, 2019
app pub date -
Jan 10, 2019
filing date -
Jan 11, 2018
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Abstract
An ignition apparatus of an internal combustion engine is provided with an ignition plug, an AC (alternating current) voltage application unit configured to apply AC voltage to the center electrode of the ignition plug, and an application voltage control unit that controls an operation of the AC voltage application unit. The application voltage control unit is configured to control the AC voltage application unit to apply the center electrode with a first AC voltage having an amplitude smaller than that of a required voltage of the ignition plug in a first period which is before an ignition timing, and to apply the center electrode with a second AC voltage having an amplitude smaller than that of the first AC voltage or to stop applying the center electrode with the AC voltage during a second period which is before the ignition timing after the first period has elapsed.
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