公开(公告)号：US20220332302A1

公开(公告)日：2022-10-20

申请号：US17641227

申请日：2020-11-25

Applicant: Hitachi Astemo, Ltd.

Inventor： Asahi WATANABE ,  Toshiya OOSAWA ,  Daisuke NEZU

IPC: B60T13/68 ,  B60T8/1755 ,  B60T8/40 ,  B60T13/14

Abstract: When another pump is actuated while a pump is de-actuated, a pressure adjustment valve is brought into a valve-opened state after a shut-off valve is actuated in a valve-opening direction and the another pump is actuated.

公开(公告)号：US20240116484A1

公开(公告)日：2024-04-11

申请号：US18553616

申请日：2022-03-04

Applicant: HITACHI ASTEMO, LTD.

Inventor： Asahi WATANABE ,  Toshiya OSAWA ,  Masaru KONISHI

IPC: B60T8/94 ,  B60T8/88 ,  B60T13/14 ,  B60T13/62 ,  B60T13/68

CPC classification number: B60T8/94 ,  B60T8/885 ,  B60T13/142 ,  B60T13/148 ,  B60T13/62 ,  B60T13/686

Abstract: Provided is a brake control device which reliably generates wheel cylinder fluid pressure in all the wheels FR to RR even at the time of failure of the brake control device, can reliably decelerate or stop a vehicle, has a simplified system configuration, and has high reliability for automatic driving. A brake device 101 of the present invention includes a first fluid pressure unit 102p which supplies brake fluid to first wheel cylinders 118a and 118d, a second fluid pressure unit 102s which supplies brake fluid to second wheel cylinders 118b and 118c, and a connection pipe 119 which connects the first fluid pressure unit and the second fluid pressure unit to allow the brake fluid to flow. The first fluid pressure unit and the second fluid pressure unit open a first shut-off valve 104p and a second shut-off valve 104s, respectively, in a case where a failure is detected in at least one of the first fluid pressure unit and the second fluid pressure unit.

公开(公告)号：US20220324430A1

公开(公告)日：2022-10-13

申请号：US17618226

申请日：2020-05-28

Applicant: Hitachi Astemo, Ltd.

Inventor： Asahi WATANABE ,  Toshiya OOSAWA

IPC: B60T17/22 ,  B60T11/26

Abstract: A second control unit controls a pump of a P system and a pump of an S system according to a stroke of a brake pedal that is detected by a stroke sensor in a state that a fluid level of brake fluid in a reservoir tank falls below a predetermined fluid surface level.

公开(公告)号：US20220185250A1

公开(公告)日：2022-06-16

申请号：US17439939

申请日：2020-03-18

Applicant: Hitachi Astemo, Ltd.

Inventor： Toshiaki NAKAMURA ,  Tohma YAMAGUCHI ,  Asahi WATANABE

IPC: B60T8/88 ,  B60T8/171 ,  H02P3/04 ,  H02P3/08

Abstract: An object of the invention is to provide a motor control device capable of realizing a redundancy while suppressing an increase in the number of parts and the number of connection signal lines.
The invention includes angle sensors 102 and 103 for detecting a rotation angle of a motor, MPU 107 for controlling the motor based on a stroke sensor 117 and receiving the detected value of the angle sensor 102, MPU 108 for controlling the motor based on the stroke sensor 117 and receiving the detected value of the angle sensor 103, and communication units 115 and 116 for transmitting and receiving signals between the MPUs 107 and 108. The MPU 107 includes an angle sensor failure detecting unit 114 for detecting a failure of the angle sensors 102 and 103, according to the detected value of the angle sensor 102, the detected value of the angle sensor 103 received through the communication unit 115, and a control angle of the motor created in response to the stroke sensor 117.