| 摘要 |
A device for controlling steering characteristics adjusting stiffness of a torsion bar is provided to reduce manufacturing cost and to simplify structure of the product by increasing steering torque when the vehicle is in low speed and reducing steering torque when the vehicle is in high speed. A device for controlling steering characteristics adjusting stiffness of a torsion bar(2) comprises a length adjusting unit(10), a motor(27), and an ECU(11). The length adjusting unit is engaged at an upper end of the torsion bar, and vertically moves to change effective length of the torsion bar and to rotary force of a steering wheel to the torsion bar. The motor moves the length adjusting unit up and down. The ECU drives the motor forwardly and reversely in accordance with drive speed sensed by a speed sensor(12) to change effective length of the torsion bar to control steering characteristics. The length adjusting unit has a length adjustable shaft(20) wherein an insert groove(22) is formed at a lower part of a center. An upper part of the torsion bar is fitted to the insert groove of the length adjustable shaft. A gear unit(25) is formed at a side part of the length adjustable shaft. The gear unit is meshed with a drive gear(26) supported by a rotary shaft of the motor.
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