PROBLEM TO BE SOLVED: To provide a steering assist device capable of providing an excellent steering characteristic.SOLUTION: A steering assist device assists a rotation of a steering system 29 transmitting a rotation of a bar handle 8 to a wheel. The steering assist device comprises: a motor 70 for outputting an assist force assisting the rotation of the steering system 29. The assist by the motor 70 is limited to be within a range including: a plus direction assist, which applies, to the steering system 29, a rotary force directed to a same direction as that of a steering torque of the bar handle 8; and a minus direction assist, which applies, to the steering system 29, a rotary force directed to an opposite direction to that of the steering torque. When the steering torque is greater than a first threshold value and a steering speed of the bar handle is greater than a second threshold value, an increase in a vehicle speed will cause the assist direction to change from the plus direction to the minus direction.SELECTED DRAWING: Figure 8
【課題】良好な操舵特性が得られる操舵補助装置を提供する。【解決手段】操舵補助装置は、バーハンドル8の回転を車輪に伝達する操舵系29の回転をアシストする。操舵補助装置は、操舵系29の回転をアシストする補助力を出力するモータ70を備える。モータ70によるアシストは、バーハンドル8の操舵トルクと同じ方向の回転力を操舵系29に付与するプラス方向アシスト、及び、操舵トルクと反対方向の回転力を操舵系29に付与するマイナス方向アシストを含む範囲で制御される。操舵トルクが第1閾値より大きく、かつ、バーハンドルの舵角速度が第2閾値より大きいときに、車両の加速度が上昇すると、アシストの方向がプラス方向からマイナス方向へ転じる。【選択図】図8
STEERING ASSIST DEVICE, SADDLE-RIDING TYPE VEHICLE, AND STEERING ASSIST METHOD
操舵補助装置、鞍乗型車両及び操舵補助方法
2017-11-24
Patent
Elektronische Ressource
Japanisch
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