Drive device for vehicle
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United States of America Patent
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Mar 15, 2016
Grant Date -
Jun 4, 2015
app pub date -
Nov 20, 2014
filing date -
Dec 2, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A drive device for a vehicle, which is capable of improving reliability of an in-gear operation for switching a speed position to an in-gear state while ensuring the degree of freedom in design of the drive device and realizing reduction of manufacturing costs thereof. When a transmission condition for transmitting motive power of the engine to front wheels via a first-speed forward position is satisfied, the ECU controls a first speed synchronization mechanism such that the first-speed forward position is switched to the in-gear state. At this time, if a condition of output shaft rotational speed≧predetermined detection lower limit is satisfied, the ECU controls the rotational speed of the front motor such that a ring gear speed is reduced, whereas if the condition is not satisfied, the ECU controls the same to a predetermined synchronization assist value for suppressing the rotational speed difference.
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