公开(公告)号：US10029726B2

公开(公告)日：2018-07-24

申请号：US15115909

申请日：2015-02-04

Applicant: KYB Corporation

Inventor： Hiroyuki Gotou ,  Hisazumi Ishikawa ,  Kazuhiro Sasaki ,  Yuichiro Okamoto ,  Nobuyuki Kimura ,  Takayuki Nagase ,  Kazuma Yamazaki

IPC: B62D5/04 ,  B62D6/02 ,  B62D6/10

Abstract: A electric power steering device includes a basic return command value calculation unit configured to calculate a basic return command value in a direction to return a steering wheel to a neutral position on the basis of a steering angle of the steering wheel, a return command value calculation unit configured to calculate a return command value by correcting the basic return command value by the first correction gain, and an opposite return command value calculation unit configured to calculate an opposite return command value in a direction not to return the steering wheel to the neutral position on the basis of an angular acceleration of an electric motor. A correction return command value is calculated on the basis of the return command value and the opposite return command value and the electric motor is driven by adding the correction return command value to the assist command value.

公开(公告)号：US10106191B2

公开(公告)日：2018-10-23

申请号：US15116507

申请日：2015-02-04

Applicant: KYB Corporation

Inventor： Hiroyuki Gotou ,  Noboru Yoshida ,  Yuichiro Okamoto ,  Nobuyuki Kimura ,  Takayuki Nagase ,  Kazuma Yamazaki

IPC: B62D5/04

Abstract: An electric power steering device includes a basic return command value calculation unit configured to calculate a basic return command value in a direction to return a steering wheel to a neutral position on the basis of a steering angle of a steering wheel, a turn/return determination unit configured to determine the turn and the return of the steering wheel, a gradually changing return command value calculation unit configured to calculate a gradually changing return command value, the gradually changing return command value gradually increasing, while the return of the steering wheel is determined by the turn/return determination unit, and a return command value calculation unit configured to calculate a return command value by adding the gradually changing return command value to the basic return command value. The electric motor is driven by adding the return command value to the assist command value.