Title:
DRIVING ASSIST DEVICE
Document Type and Number:
Japanese Patent JP2020117025
Kind Code:
A
Abstract:
To achieve high accuracy of hands-off determination by appropriately detecting driver torque during execution of steering support control.SOLUTION: A drive assist ECU 10 includes a hands-off determination section 106. The hands-off determination section 106 calculates a steering wheel steering angle θh with a hands-off state assumed on the basis of an upstream-side friction value FrU of a torsion bar 61 and a torsional stiffness value Ktb of the torsion bar 61 (S11-S15). The hands-off determination section 106 calculates a driver torque Tx by correcting an input torque Ti detected by a torque sensor 60, using a value obtained by multiplying a difference value between the steering wheel steering angle θh and an assist part steering angle θa by a torsional stiffness value Ktb (Tx=Ti-Ktb*(θh-θa)).SELECTED DRAWING: Figure 6
Inventors:
WASHINO SHIGERU
Application Number:
JP2019008676A
Publication Date:
August 06, 2020
Filing Date:
January 22, 2019
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
B62D6/00; B62D5/04
Attorney, Agent or Firm:
Patent business corporation Prospec patent office