公开(公告)号：US20240166195A1

公开(公告)日：2024-05-23

申请号：US18551673

申请日：2022-03-04

Applicant: HITACHI ASTEMO, LTD.

Inventor： Go SAKAYORI ,  Yoshitaka ATARASHI ,  Hideki ENDO ,  Noriyasu HASEJIMA

IPC: B60W30/06 ,  B60W60/00 ,  G06V20/52

CPC classification number: B60W30/06 ,  B60W60/001 ,  G06V20/52 ,  B60W2530/10 ,  B60W2556/20 ,  G06V2201/08

Abstract: The present disclosure provides a vehicle coordinating device capable of improving the accuracy of following a target path of a vehicle. A vehicle coordinating device 1 that coordinates automatic driving of a vehicle 2 by a vehicle control device 21 mounted on the vehicle 2 includes a communication unit 11, a vehicle characteristic identification unit 12, and an identification accuracy estimation unit 13. The communication unit 11 is communicably connected to the vehicle control device 21. The vehicle characteristic identification unit 12 acquires a control command value of the automatic driving and a traveling locus of the vehicle 2 from the vehicle control device 21 via the communication unit 11, and identifies the vehicle characteristic used for the automatic driving. The identification accuracy estimation unit 13 estimates the identification accuracy of the vehicle characteristic by the vehicle characteristic identification unit 12. The automatic driving coordinating unit 14 coordinates the automatic driving of the vehicle 2 based on the identification accuracy estimated by the identification accuracy estimation unit 13.

公开(公告)号：US20220340195A1

公开(公告)日：2022-10-27

申请号：US17761340

申请日：2020-09-10

Applicant: Hitachi Astemo, Ltd.

Inventor： Go SAKAYORI ,  Tomoaki FUJIBAYASHI ,  Hiroki SONODA

IPC: B62D5/04 ,  B62D15/02

Abstract: An object of the present invention is to provide a steering control device and a steering control method that can reduce a driving burden imposed on a driver during low velocity driving. The present invention is provided with an arithmetic logic unit that changes a steering angle of a wheel 11 by driving a wheel steering actuator 7 based on a manipulated variable of a steering 3, and calculates a controlled variable of the wheel steering actuator 7. In turning the steering 3, the arithmetic logic unit controls the wheel steering actuator 7 based on a first gain at which a ratio of an actual steering angle of the wheel 11 changes with respect to a steering angle δ, and in returning the steering 3, the arithmetic logic unit controls the wheel steering actuator 7 based on a second gain that differs from the first gain.

公开(公告)号：US20220073133A1

公开(公告)日：2022-03-10

申请号：US17416126

申请日：2019-08-22

Applicant: Hitachi Astemo, Ltd.

Inventor： Go SAKAYORI ,  Hiroshi NAKANO ,  Yoshiji HASEGAWA ,  Tomoaki FUJIBAYASHI ,  Junya TAKAHASHI

IPC: B62D6/00 ,  B62D7/15 ,  B62D15/02

Abstract: A steering control device for reducing a steering load on the driver by adjusting a gain of a rear wheel steering angle with respect to a front wheel steering angle operated by the driver according to a relative relationship between the vehicle and the parking frame to enable fine steering of the own vehicle near the parking frame when the four-wheel steering vehicle is parked. The steering control device is configured to control a rear wheel steering angle by a rear wheel steering system based on a front wheel steering angle operated by a driver, and includes an arithmetic device configured to reduce an absolute value of a gain of the rear wheel steering angle with respect to the front wheel steering angle as a positional relationship between an own vehicle and a parking frame comes closer when an own vehicle shifts to a parking driving mode.

公开(公告)号：US20230347972A1

公开(公告)日：2023-11-02

申请号：US17791250

申请日：2020-12-08

Applicant: Hitachi Astemo, Ltd.

Inventor： Go SAKAYORI ,  Kenta MAEDA ,  Tomoaki FUJIBAYASHI ,  Hiroki SONODA

IPC: B62D6/00

CPC classification number: B62D6/008

Abstract: The present disclosure provides a steering control device capable of transmitting an appropriate reaction force by a driver via a steering wheel and improving the stability of a vehicle. Provided is a steering control device 100 for controlling a reaction force actuator 16 that generates a reaction force against an operation of a driver in a steering wheel 13 of a vehicle 10. The steering control device 100 increases the reaction force in a nonlinear region where a cornering force characteristic that is the relationship between the slip angle and the lateral force of tires 11 of the vehicle 10 becomes nonlinear, more than the reaction force in a linear region where the cornering force characteristic becomes linear.