Driving-force transmitting apparatus for four-wheel-drive vehicle
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United States of America Patent
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Apr 23, 2013
Grant Date -
Oct 28, 2010
app pub date -
Apr 19, 2010
filing date -
Apr 23, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A transmitting apparatus includes a disengaging device that disengages a driving force from a front-wheel differential device to a first driving-force transmitting direction converting unit and a multi-plate clutch mechanism provided between an output of a rear-wheel differential device and a right-rear wheel and capable of successively adjusting a fastening force. Drag torque when the fastening of the multi-plate clutch mechanism is released is set smaller than friction torque of a rear-wheel drive system between the first driving-force transmitting direction converting unit and a second driving-force transmitting direction converting unit. A controller unconnects the disengaging device and releases the fastening of multi-plate clutch mechanism when switching to a two-wheel drive mode, thereby stopping the rotation of the rear-wheel drive system.
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