Patent ID: 8775025
Filing Date: 2014-07-08
Classification: B62D

Abstract:
1. A steering system wherein a transfer ratio of a steering angle of a steering wheel to a turning, angle of a turning wheel is changed by a variable transfer ratio mechanism, and an auxiliary power is generated during steering by an electric power steering, comprising: a transfer ratio variable motor for changing the transfer ratio, the transfer ratio variable motor being provided in the variable transfer ratio mechanism, and a variable transfer ratio mechanism controlling unit for controlling a rotational angle of the transfer ratio variable motor, wherein the variable transfer ratio mechanism controlling unit calculates a steering angular velocity of the steering wheel, and includes the variable transfer ratio mechanism controlling unit is configured to control the transfer ratio variable motor in such a manner that, when the absolute value of the steering angular velocity is equal to or less than the first non-zero predetermined value, a current value flowing through the transfer ratio variable motor gradually comes close to zero.