公开(公告)号：US20190351884A1

公开(公告)日：2019-11-21

申请号：US16402379

申请日：2019-05-03

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yasuhiro TAJIMA ,  Hiroki MIMA ,  Akihiro TAKAHASHI

IPC: B60T8/172 ,  F16D65/18 ,  F16D55/225

Abstract: An electric-brake controller controls an electric brake operable by an electric motor. The electric-brake controller includes: a rotation-angle obtainer including (i) a relative-rotation-angle obtaining unit that obtains a relative rotation angle of the electric motor for a set time, based on values output and received from a rotation-angle sensor at intervals of the set time, and (ii) an absolute-rotation-angle obtaining unit that calculates the obtained relative rotation angle with consideration of an orientation of the relative rotation angle to obtain an absolute rotation angle that is a rotation angle of the electric motor from a start of its operation; a recognition-error detector that detects a recognition error in the rotation-angle obtainer based on the obtained absolute rotation angle or a changing state of the absolute rotation angle; and a motor controller that controls the electric motor based on a result of detection performed by the recognition-error detector.