Steering system
AssigneesJtekt Corporation, Toyota Jidosha Kabushiki Kaisha
InventorsYusuke Kakimoto, Yoshiyuki Uchino, Kenji Shibata, Takafumi Sato
Life of this patent
Estimating the term…
Abstract
A steering system includes a steering shaft that rotates along with an operation of a steering wheel; a motor configured to generate a torque that is applied to the steering shaft; and a control unit configured to control the motor. The control unit is configured to control the motor such that a rotation speed of the steering wheel decreases gradually to zero when automatic rotation of the steering wheel is stopped, in a case where the steering wheel is automatically rotated as an adjustment process of adjusting a rotational position of the steering wheel.
Claims5
A steering system comprising:
- a steering shaft that rotates along with an operation of a steering wheel;
- a motor configured to generate a torque that is applied to the steering shaft;
- and
- a control unit configured to control the motor, wherein the control unit is configured to
- control the motor such that a rotation speed of the steering wheel decreases gradually to zero when automatic rotation of the steering wheel is stopped, in a case where the steering wheel is automatically rotated as an adjustment process of adjusting a rotational position of the steering wheel,
- control the motor such that the rotation speed of the steering wheel increases gradually when the automatic rotation of the steering wheel is started, in the case where the steering wheel is automatically rotated as the adjustment process,
- perform steering angle feedback control for causing a steering angle that is a rotation angle of the steering wheel to reach a target steering angle that is set based on a point of view of adjustment of the rotational position of the steering wheel, and
- gradually change the rotation speed of the steering wheel by gradually changing a value of the target steering angle to a final target steering angle that is set based on the point of view of the adjustment while limiting the value of the target steering angle, when the automatic rotation of the steering wheel is started and when the automatic rotation of the steering wheel is stopped.
Dependencies are inferred from the claim text.