| 摘要 |
PROBLEM TO BE SOLVED: To prevent lowering of durability by generation of excessive actual driving torque in auxiliary driving wheels when a four-wheel drive vehicle performs a starting without impairing startability of the vehicle. SOLUTION: When auxiliary driving wheel distribution torque calculated by a LSD control part 56 is a prescribed value or more, both of differential rotations of right and left torque distribution clutches are a prescribed value or more, and vehicle body speed detected by a vehicle body speed sensor 52a is a prescribed value or below, an upper limit value of the auxiliary driving wheel distribution torque transmitted to right and left auxiliary driving wheels from an engine via the right and left torque distribution clutches of a rear differential gear 16 is limited by a clutch torque limiting part 60. As a result, lowering of durability by the generation of excessive actual driving torque in the auxiliary driving wheels can be prevented when main driving wheels slip during the starting of the vehicle. Since output torque of the engine is not required to be reduced at the time, lowering of the startability of the vehicle is minimized. COPYRIGHT: (C)2011,JPO&INPIT
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