公开(公告)号：US20240063704A1

公开(公告)日：2024-02-22

申请号：US18269651

申请日：2021-10-15

Applicant: Hitachi Astemo, Ltd.

Inventor： Ryosuke HOSHI ,  Yasuaki AOYAMA ,  Nobuyuki ICHIMARU

IPC: H02K41/03 ,  H02K11/21 ,  B60G17/015

CPC classification number: H02K41/031 ,  H02K11/21 ,  B60G17/015

Abstract: An electromagnetic actuator device reduces pulsation and improves thrust, and includes: a magnet; and an armature that moves relative to the magnet. The armature includes: a plurality of teeth formed in a relative movement direction; a plurality of slots between the plurality of teeth; a yoke connecting the plurality of teeth; and a winding around the plurality of slots. The magnet includes a plurality of magnet portions facing the plurality of teeth via a gap and are disposed in the relative movement direction. A relationship between a minimum sectional area Sc1 of one tooth end portion of the armature and a minimum sectional area Sc2 of the other tooth end portion is Sc1>Sc2; and a relationship between the minimum sectional area Sc2 of the other tooth end portion and a sectional area Sy of the yoke in a direction crossing the relative movement direction is Sc2≥Sy.

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：US20230143565A1

公开(公告)日：2023-05-11

申请号：US17795285

申请日：2020-12-25

Applicant: Hitachi Astemo, Ltd.

Inventor： Akihito AKAI ,  Nobuyuki ICHIMARU ,  Ryusuke HIRAO

IPC: B60G17/018

CPC classification number: B60G17/0182 ,  B60G2400/05 ,  B60G2400/41 ,  B60G2400/42 ,  B60G2600/70 ,  B60G2600/182

Abstract: A sensory evaluation prediction system includes an input unit that reads an output from a behavior sensor that measures two or more types of pieces of time series information regarding a moving body, a selection unit that selects two or more types of physical quantities from the output from the behavior sensor read by the input unit, a correlation creation unit that creates information showing a correlation in time series between the two or more types of the physical quantities selected by the selection unit, and an evaluation circuit that calculates an evaluation value of a sensory index based on the information showing the correlation in time series.

公开(公告)号：US20220161624A1

公开(公告)日：2022-05-26

申请号：US17440435

申请日：2020-01-28

Applicant: Hitachi Astemo, Ltd.

Inventor： Ryusuke HIRAO ,  Nobuyuki ICHIMARU

IPC: B60G17/016 ,  B60G17/019 ,  B60G17/018

Abstract: A suspension control apparatus includes: a variable damper; a communication unit provided inside a vehicle to receive a dynamic map from a cloud; and a controller configured to adjust a force generated by the variable damper. The controller includes: a state estimation unit, which is provided inside the vehicle, and is configured to detect a motion of the vehicle; an operation-stability controller configured to calculate an AFB command value for the variable damper based on internal information output from the state estimation unit; and a dynamic-map controller configured to calculate an FF command value for the variable damper based on the dynamic map received from the communication unit. The controller determines a command value for the variable damper from the AFB command value and the FF command value.

公开(公告)号：US20220134831A1

公开(公告)日：2022-05-05

申请号：US17436896

申请日：2020-03-05

Applicant: Hitachi Astemo, Ltd.

Inventor： Akihito AKAI ,  Yuji CHIBA ,  Nobuyuki ICHIMARU ,  Ryusuke HIRAO

IPC: B60G17/0165 ,  B60G17/018 ,  G01M17/04

Abstract: A sensory evaluation system performs sensory evaluation on a plurality of sensory indexes corresponding to respective feelings of an occupant according to traveling of a moving body, and includes: a data adjustment unit that generates evaluation data to be used for the sensory evaluation based on information acquired according to the traveling of the moving body; an evaluation index determination unit that selects at least any one sensory index as an evaluation index from among the plurality of sensory indexes based on the information; an evaluation unit that calculates an evaluation value for the evaluation index from the evaluation data using an evaluation circuit corresponding to the evaluation index; and an aggregation unit that aggregates the evaluation value calculated by the evaluation unit.

公开(公告)号：US20230226868A1

公开(公告)日：2023-07-20

申请号：US17928878

申请日：2021-04-16

Applicant: Hitachi Astemo, Ltd.

Inventor： Yasuaki AOYAMA ,  Ryosuke HOSHI ,  Nobuyuki ICHIMARU

IPC: B60G15/04 ,  H02K41/03 ,  B60G17/06 ,  B60G17/015

CPC classification number: B60G15/04 ,  H02K41/031 ,  B60G17/06 ,  B60G17/0157 ,  B60G2202/25 ,  B60G2202/422 ,  B60G2204/62 ,  B60G2206/41 ,  B60G2500/104 ,  B60G2600/24 ,  B60G2800/162

Abstract: The present invention provides an electromagnetic suspension capable of suppressing interference with other components and devices, being mounted in a narrow space, and having a small thrust pulsation, a large thrust, and a high damping performance even for a high-frequency vibration source. An electromagnetic suspension of the present invention includes a linear motor that includes an armature and a permanent magnet portion, the armature including a winding and a magnetic body, the permanent magnet portion being disposed on an outer periphery of the armature and including a permanent magnet and a cylindrical magnetic body, and the armature and the permanent magnet portion being relatively linearly driven in the linear motor, in which a recess recessed from an outer peripheral portion of the cylindrical magnetic body and a protrusion protruding from the outer peripheral portion are disposed on the same circumference of the outer peripheral portion of the cylindrical magnetic body.

公开(公告)号：US20220097473A1

公开(公告)日：2022-03-31

申请号：US17425437

申请日：2020-01-08

Applicant: Hitachi Astemo, Ltd.

Inventor： Kentaro KASUYA ,  Ryusuke HIRAO ,  Nobuyuki ICHIMARU

IPC: B60G17/0165

Abstract: Provided is a vehicle behavior device including: a variable damper, which is provided between a vehicle body side and a wheel side of a vehicle, and is configured to adjust a force to be generated; a camera device configured to measure a road surface state forward of the vehicle; a future vehicle state estimation unit configured to predict a sprung behavior of the vehicle from a road surface displacement acquired by the camera device and a vehicle speed; and a command value calculation unit configured to obtain a force to be generated by the variable damper based on a predicted value obtained by the future vehicle state estimation unit, and output a command signal.

公开(公告)号：US20210323368A1

公开(公告)日：2021-10-21

申请号：US17271007

申请日：2019-08-15

Applicant: Hitachi Astemo, Ltd.

Inventor： Masatoshi YAMAHATA ,  Yuki YOSHIDA ,  Nobuyuki ICHIMARU

IPC: B60G17/015 ,  B60G17/052

Abstract: When a vehicle's driving situation is a rolling state, a compressor is used to transfer compressed air between left and right air suspensions of front wheels, and a compressor is used to transfer compressed air between left and right air suspensions of rear wheels. The air suspensions of the left and right front wheels and the air suspensions of the left and rear wheels thus independently generate counter rolls. This makes it possible to concurrently perform vehicle height adjustment of the air suspensions of the left and right front wheels and vehicle height adjustment of the air suspensions of the left and right rear wheels, which improves responsiveness in counter roll control.

公开(公告)号：US20230100858A1

公开(公告)日：2023-03-30

申请号：US17911244

申请日：2021-03-05

Applicant: Hitachi Astemo, Ltd.

Inventor： Ryusuke HIRAO ,  Nobuyuki ICHIMARU

IPC: B60G17/018 ,  G06N3/08

Abstract: A controller includes a calculation processing portion configured to make a predetermined calculation based on an input vehicle state amount and output a target damping force, and a damping force map configured to acquire a control instruction value for controlling a variable damper based on the target damping force. The calculation processing portion makes the calculation using a learning result that is acquired by causing the calculation processing portion to learn pairs of a plurality of target amounts acquired using a predetermined evaluation method prepared in advance with respect to a plurality of different vehicle state amounts as pairs of pieces of input and output data.

公开(公告)号：US20230061807A1

公开(公告)日：2023-03-02

申请号：US17797250

申请日：2021-02-04

Applicant: HITACHI ASTEMO, LTD.

Inventor： Yuki YOSHIDA ,  Ryusuke HIRAO ,  Nobuyuki ICHIMARU

IPC: B60G17/0195 ,  B60G17/016

Abstract: A vehicle control device includes a vertical VSE, a riding comfort control logic, a planar VSE, a steering stability control logic, a command limiting unit, a control command selection unit. The command limiting unit acquires specifications related to a traveling of a vehicle such as, for example, a slip rate and a four-wheel independent braking/driving force control flag through a CAN. The command limiting unit limits a variable range of a damping force generated by a suspension device provided between a vehicle body and wheels of the vehicle based on the specifications related to the traveling of the vehicle to obtain a first command value. The command limiting unit outputs the obtained first command value to the control command selection unit.