公开(公告)号：US20210265936A1

公开(公告)日：2021-08-26

申请号：US17261642

申请日：2019-06-17

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Hiroaki SATO ,  Toshiyuki AJIMA ,  Kenichiro MATSUBARA ,  Daisuke GOTO

IPC: H02P23/14 ,  B60T13/74 ,  B60T1/06 ,  F16D65/18 ,  H02P23/00 ,  H03H17/02 ,  H02P23/12

Abstract: An object of the present invention is to provide a motor control device capable of estimating a delay with high accuracy even in a case where there is a fluctuation in disturbance torque or delay time and of suppressing the influence of the delay. For this end, the present invention includes a motor MTR, an ECU 2 that controls the rotation of the motor MTR, and an ECU 1 that sends a torque command to the ECU 2 based on a command value. The ECU 1 includes a disturbance estimation block 100 and a delay estimation block 200. The disturbance estimation block 100 estimates disturbance torque (τd) using a torque command input to the ECU 2 and a feedback value of the motor MTR. The delay estimation block 200 estimates a delay using a torque command output from the ECU 1, the feedback value of the motor MTR, and the disturbance torque (τd).

公开(公告)号：US20200262409A1

公开(公告)日：2020-08-20

申请号：US16647599

申请日：2018-09-18

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Naoki TAKAHASHI ,  Daisuke GOTO ,  Takaya TSUKAGOSHI ,  Norikazu MATSUZAKI ,  Hiroaki SATO

IPC: B60T13/74 ,  B60T13/66 ,  B60T8/32

Abstract: An electric booster including an input member that is advanceably/retractably moved according to a brake pedal operation. An electric motor of an electric actuator advanceably/retractably moves a power piston. A master pressure control unit sets a target movement amount of the power piston according to an amount of a movement of the input member that is caused by the brake pedal, and controls the electric motor to move the power piston so as to achieve the target movement amount, thereby causing a brake hydraulic pressure to be generated in a master cylinder. The master pressure control unit includes a reaction force generation portion, which changes a characteristic of a hydraulic reaction force applied to the brake pedal. The reaction force generation portion corrects the target movement amount of the power piston according to a temporal change in the movement amount of the input member.