公开(公告)号：US11358432B2

公开(公告)日：2022-06-14

申请号：US17277538

申请日：2019-09-11

Applicant: Hitachi Astemo, Ltd.

Inventor： Ryusuke Hirao ,  Nobuyuki Ichimaru

IPC: B60G17/016 ,  B60G17/08 ,  B60G13/08 ,  B60G17/018 ,  F16F9/53

Abstract: Provided a suspension control apparatus including a vehicle behavior detection unit (acceleration sensors), an electrorheological damper provided between a vehicle body (1) and each wheel (2), and a controller configured to execute control so that a damping force of each electrorheological damper is adjusted based on a detection result obtained by the vehicle behavior detection unit. The controller includes a target voltage value setting unit (damping force command calculation unit) configured to obtain a target voltage value to be applied to an electrode tube based on the detection result obtained by the vehicle behavior detection unit, a temperature estimation unit configured to detect or estimate temperature of ERF, and a target voltage value correction unit (output limiting unit) configured to change the target voltage value so that a piston speed (V) is adjusted based on a value obtained by the temperature estimation unit.

公开(公告)号：US11897303B2

公开(公告)日：2024-02-13

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

CPC classification number: B60G17/0195 ,  B60G17/016 ,  B60G2400/82 ,  B60G2500/10 ,  B60G2800/21

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.

公开(公告)号：US11945428B2

公开(公告)日：2024-04-02

申请号：US17762131

申请日：2020-08-27

Applicant: Hitachi Astemo, Ltd.

Inventor： Ryusuke Hirao ,  Nobuyuki Ichimaru

IPC: B60T8/1755 ,  B60G17/016 ,  B60W10/18 ,  B60W10/22 ,  B60W30/04 ,  B60W40/109 ,  B60W40/11 ,  B60W40/112 ,  B60W40/114

CPC classification number: B60T8/17554 ,  B60G17/0162 ,  B60T8/17551 ,  B60W10/18 ,  B60W10/22 ,  B60W30/04 ,  B60W40/109 ,  B60W40/11 ,  B60W40/112 ,  B60W40/114 ,  B60G2400/0521 ,  B60G2400/0522 ,  B60G2400/0523 ,  B60G2400/104 ,  B60G2500/10 ,  B60G2800/9124 ,  B60T2230/03 ,  B60T2250/03 ,  B60W2520/125 ,  B60W2520/14 ,  B60W2520/16 ,  B60W2520/18 ,  B60W2710/18 ,  B60W2710/226

Abstract: In a vehicle, GV control and M+ control are executed by generating braking/driving forces from a brake hydraulic pressure control device and a drive device during steering. A controller estimates (calculates), by a posture estimation unit, a pitch amount and a roll amount (predicted pitch rate and predicted roll rate) that occur in the vehicle through use of a moment command of the M+ control and a longitudinal G command of the GV control. The controller adjusts damping forces of damping force variable dampers through use of the estimated pitch amount and the estimated roll amount (predicted pitch rate and predicted roll rate) so that a pitch amount calculated by a pitch control unit and a roll amount calculated by a roll suppression unit approach respective target values.

公开(公告)号：US11491840B2

公开(公告)日：2022-11-08

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：US12162322B2

公开(公告)日：2024-12-10

申请号：US17440435

申请日：2020-01-28

Applicant: Hitachi Astemo, Ltd.

Inventor： Ryusuke Hirao ,  Nobuyuki Ichimaru

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

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：US11807249B2

公开(公告)日：2023-11-07

申请号：US17311858

申请日：2019-08-19

Applicant: Hitachi Astemo, Ltd.

Inventor： Shingo Nasu ,  Shinji Seto ,  Nobuyuki Ichimaru ,  Ryusuke Hirao

IPC: B60W40/10 ,  B60W30/18 ,  B60W40/109

CPC classification number: B60W40/109 ,  B60W30/18 ,  B60W2510/22 ,  B60W2520/125 ,  B60W2520/14 ,  B60W2520/28

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：US12240285B2

公开(公告)日：2025-03-04

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：US12138980B2

公开(公告)日：2024-11-12

申请号：US17795285

申请日：2020-12-25

Applicant: Hitachi Astemo, Ltd.

Inventor： Akihito Akai ,  Nobuyuki Ichimaru ,  Ryusuke Hirao

IPC: B60G17/018

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：US11884119B2

公开(公告)日：2024-01-30

申请号：US17425437

申请日：2020-01-08

Applicant: Hitachi Astemo, Ltd.

Inventor： Kentaro Kasuya ,  Ryusuke Hirao ,  Nobuyuki Ichimaru

IPC: B60G17/0165

CPC classification number: B60G17/0165 ,  B60G2400/60 ,  B60G2400/821 ,  B60G2500/22

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.