Title:
ROAD SURFACE STATE DETECTION DEVICE AND POWER STEERING APPARATUS INCLUDING THE ROAD SURFACE STATE DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2023058836
Kind Code:
A
Abstract:
To make it possible to determine road surface conditions corresponding to various operations and driving conditions with higher accuracy.SOLUTION: A road surface state detection device 80 includes: a steering angle detection section 51A for detecting a steering angle θs of a steering wheel 21; a steering speed detection section 52 for detecting a steering speed; an axial force detection section 58 for detecting axial force fr of a turning shaft 41 of a turning section 24 for turning wheels 23 and 23; a yaw rate detection section 63 for detecting a yaw rate Yr generated in a vehicle 10; a G detection section 62A for detecting lateral G and longitudinal G generated in the vehicle; a first road surface condition determination section 81 for determining the road surface condition of a road surface Rd with which the wheels 23 and 23 are in contact, on the basis of the value of the axial force fr with respect to the steering angle θs (and preferably a vehicle speed Vs); and a second road surface condition determination section 82A for determining the road surface condition of the road surface Rd with which the wheels 23 and 23 are in contact, on the basis of the value of the yaw rate Yr with respect to the steering angle θs, steering speed, lateral G, and longitudinal G.SELECTED DRAWING: Figure 9
Inventors:
YASUMA TOMOSUKE
FUKUSHI KYOHEI
KIKUCHI NORIO
FUKUSHI KYOHEI
KIKUCHI NORIO
Application Number:
JP2021168590A
Publication Date:
April 26, 2023
Filing Date:
October 14, 2021
Export Citation:
Assignee:
HITACHI ASTEMO LTD
International Classes:
B62D6/00; B60W30/02; B60W40/068; B60W50/14; B62D5/04
Attorney, Agent or Firm:
Yoichiro Shimoda