Power transmission device
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United States of America Patent
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Dec 16, 2014
Grant Date -
Jan 30, 2014
app pub date -
Mar 27, 2012
filing date -
Mar 31, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
During an inertial energy storage operation, electric power conversion at an inverter is controlled such that a direct current electric power from an electric power storage device is converted into an alternating current by the inverter so as to be supplied to stator windings, such that torque in the direction of engine rotation is applied to an output side rotor from a stator to rotatively drive the output side rotor in a state where power transmission from the output side rotor to a drive axle is stopped. During a cranking operation after the inertial energy storage operation, the electric power conversion at an inverter is controlled to permit application of the alternating current to rotor windings, such that a torque in the direction of engine rotation is applied to an input side rotor from the output side rotor, thereby rotatively driving an input side rotor to crank the engine.
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