Patent ID: 11912351
Assignee: HITACHI ASTEMO, LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 19:
20. A steering device which includes a steering member operated by a driver, a torque application unit which applies an assist torque or a reaction torque to the steering member, and a steering control unit, wherein
the steering control unit includes
a torque loss estimation unit which estimates torque loss,
a rack axial force estimation unit which calculates an estimated value of a suspension damping force with reference to a roll rate of a vehicle body, and estimates a rack axial force from the estimated value of the suspension damping force,
a correction amount calculation unit which calculates a correction amount according to the rack axial force estimation value when the torque loss estimation unit estimates the torque loss,
a base control amount calculation unit which calculates a base control amount with reference to a steering torque applied to the steering member and a vehicle speed, and
a control amount correction unit which corrects the base control amount calculated by the base control amount calculation unit with reference to the correction amount calculated by the correction amount calculation unit, and calculates a steering control amount for supplying to the torque application unit.