Vehicle and method of controlling a vehicle
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United States of America Patent
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Jun 14, 2016
Grant Date -
Mar 13, 2014
app pub date -
Feb 20, 2012
filing date -
Feb 18, 2011
priority date (Note) -
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Abstract
A vehicle having a prime mover and a driveline to connect the prime mover to first and second groups of wheels such that the first group is driven by the prime mover when the driveline is in a first mode, and the first and second groups are driven when the driveline is in a second mode. The driveline comprises an auxiliary portion comprising first and second releasable torque transmitting mechanisms and a prop shaft. The first and second torque transmitting mechanisms are respectively operable to connect the prop shaft to the prime mover and to the second group of wheels. The driveline is operable to transition to the second mode when a second condition is met that includes a vehicle operating parameter exceeding a first threshold, and to transition to the first mode when a first condition is met that includes the operating parameter being less than a second threshold.
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