Ignition apparatus for internal combustion engine
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United States of America Patent
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Oct 30, 2018
Grant Date -
Oct 5, 2017
app pub date -
Aug 26, 2015
filing date -
Sep 2, 2014
priority date (Note) -
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Abstract
An ignition apparatus for an internal combustion engine includes: a spark plug; a first ignition coil and a second ignition coil; a battery; a booster circuit that boosts a voltage supplied from the battery; a power transistor that conducts and interrupts a primary current flowing to a primary coil included in the first ignition coil; a MOSFET that applies and interrupts the voltage boosted by the booster circuit to a primary coil included in the second ignition coil; and an ECU that starts electric discharge by the spark plug by controlling the power transistor, and repeatedly applies and interrupts the voltage boosted by the booster circuit by the MOSFET so that the electric discharge that is started is maintained.
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