| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driving force control device of a four-wheel drive vehicle allowing durability of parts constituting a power transmission path to sub-driving wheels by suppressing transmission of excessive driving torque to the sub-driving wheels, even if an ultra low speed gear stage of a transmission is attained in non four-wheel drive state in spite of no switching request to the ultra low speed gear stage. <P>SOLUTION: When a maximum shift ratio of the automatic transmission 22 is established by a torque distribution control means 112 in spite of no switch request to the maximum shift ratio of the automatic transmission 22, a torque value distributed to front wheels (the sub-driving wheels) 27 by a connecting clutch TFC of a transfer device 24 is increased to a prescribed value or more. As a result, transmission of excessive driving torque to rear wheels (main driving wheels) 25 to be other driving wheels is suppressed, even if a ultra low speed gear stage of the transmission is attained in non four-wheel drive state in spite of no switching request to the ultra low speed gear stage, and durability of the parts constituting the power transmission path to the rear wheels 25 can be obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
