| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent an engine racing even when starting a vehicle by changing from a two-wheel drive state to a four-wheel drive state due to the cold district or wintertime or the like. <P>SOLUTION: The driving force transmission system A has a transfer 11, a lock mechanism (a first clutch device) 75, and a clutch device (a second clutch device) 41. The transfer 11 distributes a driving force from the engine to a front wheel side rotating shaft and a rear wheel side rotating shaft. The lock mechanism 75 couples so as to rotate the front wheel side rotating shaft and the rear wheel side rotating shaft synchronously, and releases the coupling the front wheel side rotating shaft and the rear wheel side rotating shaft so as to enable differential rotation. The clutch device 41 is provided between the front wheel side rotating shaft and the front wheel, transmits the driving force from the engine to the front wheel side by coupling, and cuts off the transmission to the front wheel side by releasing the coupling. The driving force transmission system A releases the coupling of the first clutch device 75 when the first clutch device 75 is coupled and the coupling of the second clutch device 41 is completed in the case of coupling the second clutch device 41. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
