| 摘要 |
PROBLEM TO BE SOLVED: To reduce the vibration generated in a power transmission route and the noise resulting from the vibration and improve the degradation of driveability when a slip occurs in a four-wheel drive vehicle. SOLUTION: When a slip is detected while a vehicle is started (S3, S4), an engine torque is maintained at an engine torque f1 at that time (S5, S10), and a torque vibration waveform expected to occur on the side of a wheel on which the slip occurs is calculated (S7, S12). The engine torque is increased by an additional torque f2 at the timing t1 determined to offset the torque vibration (S9, S14) to reduce the torque vibration. When the torque vibration is reduced and the wheel is brought into a prescribed slip state, the deformation of the power transmission route is reduced more than during the gripping according to the degree of the slip state, a drive force distribution ratio is reduced, and the distributed torque of a drive wheel on the opposite side is increased. Consequently, a large drive force can be provided even on a lowμroad. COPYRIGHT: (C)2008,JPO&INPIT
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