Title:
車両の操舵アシスト装置
Document Type and Number:
Japanese Patent JP4367383
Kind Code:
B2
Abstract:
A steering assist apparatus for a vehicle includes an electric motor 15 for steering assist. Rotation output of the electric motor 15 is reduced in speed by a ball-screw mechanism 16 and converted to rectilinear motion, which is transmitted to a rack bar 14. An electronic control unit 24 determines a target current value in accordance with a steering torque detected by a steering torque sensor 21 and a vehicle speed detected by a vehicle speed sensor 23. While using an actual current value of the electric motor 15 detected by a current sensor 25a as a feedback, the electronic control unit 24 controls the current flowing through the electric motor 15 such that the current becomes equal to the target current value. The electronic control unit 24 changes the feedback gain of the feedback control in accordance with a steering angle detected by a steering angle sensor 22, to thereby suppress abnormal noise generated at a steering mechanism. Thus, in the steering assist apparatus for a vehicle, the abnormal noise generated by the steering mechanism is suppressed without deteriorating steering feel.
Inventors:
Masaharu Yamashita
Shuji Fujita
Shuji Fujita
Application Number:
JP2005200520A
Publication Date:
November 18, 2009
Filing Date:
July 08, 2005
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
B62D6/00; B62D5/04; B62D101/00; B62D113/00; B62D117/00
Domestic Patent References:
| JP8072731A | ||||
| JP2000108916A | ||||
| JP2001239947A | ||||
| JP2001253358A | ||||
| JP2004338696A | ||||
| JP2005022468A | ||||
| JP2005170283A |
Attorney, Agent or Firm:
Patent business corporation Prospec patent office