公开(公告)号：US20230137911A1

公开(公告)日：2023-05-04

申请号：US17918019

申请日：2021-04-12

Applicant: Hitachi Astemo, Ltd.

Inventor： Shingo NASU ,  Kentarou UENO ,  Ryusuke HIRAO ,  Masaru YAMASAKI

IPC: B60W60/00 ,  B60W40/072

Abstract: A vehicle motion control device generates a travel route where behavior of a vehicle traveling on a curve is small and comfortable ride is achieved even when the vehicle travels on a continuous curve. The control device includes a travel track generation unit that generates, based on information on a curvature of a first curve on a lane existing in a traveling direction of a vehicle and a curvature of a second curve connected to the first curve, a travel route by setting curvature of the travel route at a time of traveling on a curve having a smaller curvature between the first and second curves to be larger than the curvature of the curve and setting a curvature of the travel route at a time of traveling on a curve having a larger curvature between the first and second curves to be smaller than the curvature of the curve.

公开(公告)号：US20220017105A1

公开(公告)日：2022-01-20

申请号：US17311858

申请日：2019-08-19

Applicant: Hitachi Astemo, Ltd.

Inventor： Shingo NASU ,  Shinji SETO ,  Nobuyuki ICHIMARU ,  Ryusuke HIRAO

IPC: B60W40/109 ,  B60W30/18

Abstract: An object of the present invention is to provide a vehicle motion state estimation device and method that can estimate the vertical motion state amount with high accuracy by taking into consideration vertical force in which the frictional force acting in the front-rear direction or lateral direction of the wheel acts on the vehicle body due to the geometry of suspension. A vehicle motion state estimation device in a vehicle in which a wheel and a vehicle body are coupled via a suspension, the vehicle motion state estimation device including: a vertical motion-caused wheel speed component estimation unit that estimates a wheel speed component caused by vertical motion of the vehicle; a vertical force estimation unit that calculates vertical force in which frictional force of the wheel caused by motion of the vehicle acts on the vehicle body by geometry of the suspension; and a vertical motion estimation unit that estimates a state amount of vertical motion of a vehicle, in which the vertical motion estimation unit estimates a state amount of vertical motion of the vehicle based on a wheel speed component from the vertical motion-caused wheel speed component estimation unit and vertical force acting on the vehicle body from the vertical force estimation unit.

公开(公告)号：US20250018760A1

公开(公告)日：2025-01-16

申请号：US18274068

申请日：2022-01-20

Applicant: Hitachi Astemo, Ltd.

Inventor： Yuki YOSHIDA ,  Ryusuke HIRAO ,  Shingo NASU

IPC: B60G17/016

Abstract: A suspension control unit includes a slip state detection apparatus configured to detect a slip state of a wheel. The slip state detection apparatus includes a second slip ratio calculation portion, a slip ratio distribution calculation portion, and a third slip ratio calculation portion. The second slip ratio calculation portion determines a tire characteristic-considered slip ratio (a second slip ratio) according to a longitudinal acceleration of a vehicle detected by a longitudinal acceleration sensor (a longitudinal acceleration) and a tire characteristic (a slip ratio coefficient). The slip ratio distribution calculation portion calculates a percentage of a slip ratio of each wheel. The third slip ratio calculation portion determines a corrected slip ratio of each wheel (a third slip ratio) by correcting the tire characteristic-considered slip ratio (the second slip ratio) according to the percentage of the slip ratio of each wheel calculated according to a rotational velocity signal of each wheel.

公开(公告)号：US20250145155A1

公开(公告)日：2025-05-08

申请号：US18730246

申请日：2022-10-25

Applicant: Hitachi Astemo, Ltd.

Inventor： Shingo NASU ,  Kentarou UENO ,  Shinji SETO

IPC: B60W30/14

Abstract: The present invention provides a vehicle movement control device to achieve both ride quality and minimization in travel time by setting a speed to make a physical quantity of an acceleration or jerk fall within a specified value in consideration of cooperation of longitudinal movement and lateral movement generated on a vehicle during travel. The vehicle movement control device includes: path command value calculation means that generates a path on which a vehicle travels; specified value setting means that sets a specified value of a physical quality of a vehicle behavior when traveling on the path; path feature point setting means that sets a path feature point based on the path and the specified value; and speed command value calculation means that calculates a speed for the vehicle to travel on the path based on the path, the specified value, and the path feature point. The speed command value calculation means sets a zero point of a longitudinal acceleration based on a path feature point that is a peak point of a curvature of the path, and sets a peak point of a longitudinal acceleration based on a path feature point that is a peak point of a distance derivative value of the curvature.

公开(公告)号：US20230227068A1

公开(公告)日：2023-07-20

申请号：US18009840

申请日：2021-04-14

Applicant: Hitachi Astemo, Ltd.

Inventor： Shingo NASU ,  Ryusuke HIRAO ,  Kentarou UENO ,  Masaru YAMASAKI

IPC: B60W60/00 ,  B60W40/107 ,  B60W40/109 ,  B60W40/06

CPC classification number: B60W60/0013 ,  B60W60/0015 ,  B60W40/107 ,  B60W40/109 ,  B60W40/06

Abstract: An object of the present invention is to provide a vehicle motion control device that generates a travel path capable of realizing comfortable ride comfort and high safety with a small physical quantity related to a vehicle behavior such as a longitudinal acceleration, a lateral acceleration, and a vertical acceleration generated when a vehicle passes or avoids with respect to a predetermined region such as unevenness on a course of a vehicle. Therefore, the vehicle motion control device includes a vehicle behavior prediction portion that predicts a physical quantity related to a vehicle behavior that occurs when a vehicle maintains a reference route toward a predetermined region on a course and a physical quantity related to a vehicle behavior that occurs when the vehicle shifts to an avoidance route for avoiding the predetermined region, and a path generation portion that generates a travel path defined by the reference route or the avoidance route in which the physical quantity is smaller than a defined value.

公开(公告)号：US20240246562A1

公开(公告)日：2024-07-25

申请号：US18559928

申请日：2022-04-26

Applicant: Hitachi Astemo, Ltd.

Inventor： Shingo NASU ,  Kentarou UENO ,  Masaru YAMASAKI

IPC: B60W60/00 ,  G01C21/34

CPC classification number: B60W60/001 ,  G01C21/34 ,  B60W2556/40 ,  B60W2720/10

Abstract: The present invention provides a vehicle motion control device configured to set speed of an own vehicle in consideration of not only nearby information of the own vehicle but also long-distance information of the own vehicle, so as to reduce an unexpected behavior of the vehicle occurring during travel. The vehicle motion control device includes: a nearby information acquisition unit configured to acquire nearby information of a vehicle; a long-distance information acquisition unit configured to acquire long-distance information of the vehicle; and a speed planning unit configured to generate a speed command value as a travel target of the vehicle, based on the nearby information and the long-distance information.

公开(公告)号：US20240034328A1

公开(公告)日：2024-02-01

申请号：US18265804

申请日：2021-11-10

Applicant: Hitachi Astemo, Ltd.

Inventor： Shingo NASU ,  Kentarou UENO ,  Masaru YAMASAKI

IPC: B60W40/072 ,  G08G1/16 ,  B60W40/107 ,  B60W40/109 ,  B60W10/04 ,  B60W10/18 ,  B60W10/20

CPC classification number: B60W40/072 ,  G08G1/167 ,  B60W40/107 ,  B60W40/109 ,  B60W10/04 ,  B60W10/18 ,  B60W10/20 ,  B60W2520/10 ,  B60W2552/30 ,  B60W2710/18 ,  B60W2710/20 ,  B60W2720/10 ,  B60W30/045

Abstract: The present invention provides a vehicle motion control device capable of reducing vibration generated in a running vehicle and suppressing the occurrence of an unstable behavior of the vehicle. A vehicle motion control device that controls a motion of a vehicle includes an operation management unit that generates traveling status information of the vehicle, a traveling track generation unit that generates a traveling track of the vehicle based on the traveling status information, and a travel control unit that controls driving, braking, and steering of the vehicle based on the traveling track. The traveling track generation unit includes a course planning unit that generates a target course based on the traveling status information and a speed planning unit that plans a target speed by calculating a longitudinal acceleration and a lateral acceleration whose composite acceleration has one peak when the vehicle travels on each curve in the target course.