US 11,738,805 B2
Estimation device for estimating friction coefficient of road surface and steering device
Goichi Kobayashi, Tokyo (JP)
Assigned to SUBARU CORPORATION, Tokyo (JP)
Filed by SUBARU CORPORATION, Tokyo (JP)
Filed on Apr. 1, 2021, as Appl. No. 17/220,594.
Claims priority of application No. 2020-068210 (JP), filed on Apr. 6, 2020.
Prior Publication US 2021/0309294 A1, Oct. 7, 2021
Int. Cl. B62D 15/02 (2006.01); G01N 19/02 (2006.01); B60Q 9/00 (2006.01)
CPC B62D 15/025 (2013.01) [B60Q 9/00 (2013.01); G01N 19/02 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An estimation device for estimating a friction coefficient of a road surface, the estimation device comprising:
a sensor configured to detect a force acting on a wheel;
a moment calculator configured to calculate a moment around a vertical axis at a center of a ground contact load of a tire of the wheel on a basis of an output of the sensor; and
a friction coefficient estimator configured to estimate the friction coefficient of the road surface with which the tire is in contact, on a basis of the moment.