| 摘要 |
PROBLEM TO BE SOLVED: To operate each clutch device by a single drive source in a four-wheel drive vehicle to uncouple the driving force by both a transfer side wheel and an uncoupling side wheel. SOLUTION: A driving force transmission system comprises a driving force distribution mechanism 7 to distribute the driving force from a prime mover 3 into a front wheel side rotary shaft 29 and a rear wheel side rotary shaft 9, a first clutch device 23 to change the front wheel side rotary shaft 29 and the rear wheel side rotary shaft 9 into a coupling condition in which both rotary shafts are in the same rotation and the uncoupling condition in which both rotary shafts are in the differential rotation, and a second clutch device 33 which is provided on the front wheel side or the rear wheel side to be uncoupled when uncoupling the first clutch device 23 and changing both rotary shafts to the coupling condition of transmitting the driving force to each axle and the uncoupling condition of uncoupling the driving force from each axle, and the first clutch device 23 and the second clutch device 33 are driven by a single drive source 47. COPYRIGHT: (C)2005,JPO&NCIPI
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