| 摘要 |
PROBLEM TO BE SOLVED: To reduce vibration sound from an EPS (electric power steering) motor and to suppress a uncomfortable sense of riding comfortability of a driver generated by the fact that the vibration of the EPS motor is transmitted to a vehicle body and influence to behavior of the vehicle body. SOLUTION: When a driving current of the EPS motor is vibrated by vibration of a tire rubber caused by lateral force of the tire, the vibration part is removed. Specifically, the current becoming reverse phase and the same amplitude is applied to the vibration part of the driving current of the EPS motor. Thereby, the influence of the vibration of the tire rubber caused by the lateral force of the tire can be eliminated from the driving current of the EPS motor. Accordingly, the vibration sound from the EPS motor can be reduced and it becomes possible that uncomfortable sense of riding comfortability generated by the transmission of the vibration of the EPS motor 4 to the vehicle body and the influence to the behavior of the vehicle body are suppressed. COPYRIGHT: (C)2005,JPO&NCIPI |
