| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric suspension system capable of reducing an undesirable yaw moment. SOLUTION: When a vehicle passes over a projection 200 on a road surface, the directions of the rotating motion parts of approaching/separating force generating devices 20FR, 20FL (RR, RL) for generating the forces in the directions of approaching/separating each of left and right wheels 12 and a vehicle body 14 are reverse to each other. The rotating motion parts 98 is formed of the motor shaft 54 and the rotor 56 of an electric motor 42 and the nut 60 of a ball screw device 44. To reverse the directions of the rotating motion parts 98, the directions of the screws of the ball screw devices 44 of the approaching/separating force generating devices 20FR, 20FL (RR, RL) adjacent to each other in the lateral direction are reverse to each other. As a result, when the vehicle passes over the projection 200, the moments due to the change of the angular velocities of the left and right rotating motion parts 98 are canceled each other, and the undesirable yaw moment can be reduced. COPYRIGHT: (C)2009,JPO&INPIT
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