US 12,168,488 B2
Steering holding determination device, steering control device, and steering device
Hirokazu Fujimoto, Hitachinaka-shi, (JP); Tatsuru Niihara, Hitachinaka (JP); Yoshinori Kohno, Hitachinaka (JP); Hiroki Sato, Hitachinaka (JP); Shigeharu Shibahata, Hitachinaka (JP); and Daisuke Tsuga, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
Filed on May 19, 2022, as Appl. No. 17/748,172.
Application 17/748,172 is a continuation of application No. PCT/JP2019/048914, filed on Dec. 13, 2019.
Claims priority of application No. 2019-221577 (JP), filed on Dec. 6, 2019.
Prior Publication US 2022/0274643 A1, Sep. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B62D 6/00 (2006.01); B62D 1/28 (2006.01); B62D 5/04 (2006.01); B62D 15/02 (2006.01)
CPC B62D 6/008 (2013.01) [B62D 5/0463 (2013.01); B62D 6/002 (2013.01); B62D 15/025 (2013.01); B62D 1/286 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A steering holding determination device configured to determine whether a driver holds a steering wheel, the steering holding determination device comprising:
a processor, wherein
the processor is configured to:
sequentially calculate a predicted value of a state quantity with reference to a steering torque and an actual measured value of the state quantity, the state quantity being related to a turning angle of a wheel; and
determine whether the driver holds the steering wheel with reference to the predicted value calculated by the processor and an actual measured value of the state quantity measured at a time corresponding to the predicted value, and
the state quantity is a displacement of a rack shaft connected to the wheel.