公开(公告)号：US20220032707A1

公开(公告)日：2022-02-03

申请号：US17277453

申请日：2019-09-18

Applicant: Hitachi Astemo, Ltd.

Inventor： Yuki YOSHIDA ,  Masatoshi YAMAHATA

IPC: B60G17/015 ,  B60G17/017 ,  B60G17/019

Abstract: A stopped vehicle height of an air suspension for a stop-side wheel on a side that stops first is determined in consideration of a vehicle height that changes in accordance with a vehicle height change of the air suspension for a supply/discharge-side wheel on another side after a stop. Thus, when vehicle height adjustment of the air suspension for the supply/discharge-side wheel is finished, the stopped vehicle height of the air suspension for the stop-side wheel can be adjusted to the vicinity of a target value and the precision in the vehicle height adjustment can be increased.

公开(公告)号：US20230271471A1

公开(公告)日：2023-08-31

申请号：US18014253

申请日：2021-07-06

Applicant: Hitachi Astemo, Ltd.

Inventor： Masatoshi YAMAHATA ,  Ryusuke HIRAO ,  Yuki YOSHIDA

IPC: B60G17/018 ,  B60G17/0165

CPC classification number: B60G17/0182 ,  B60G17/0165 ,  B60G2400/208 ,  B60G2500/10 ,  B60G2401/28 ,  B60G2600/60 ,  B60G2400/0511 ,  B60G2400/0512 ,  B60G2400/252 ,  B60G2400/102 ,  B60G2400/821

Abstract: A controller estimates a state of a vehicle based on a wheel speed sensor provided on the vehicle, and outputs a control signal to a shock absorber provided between a wheel and a vehicle body according to the estimated state of the vehicle. The controller uses information of a sensor of an in-vehicle apparatus other than an apparatus dedicated to the shock absorber as an observed value in the estimation of the state of the vehicle. In other words, the controller uses sensor information of a navigation apparatus corresponding to the in-vehicle apparatus other than the shock absorber, more specifically, gyro information meaning information of a gyro sensor mounted on the navigation apparatus as the observed value in the estimation of the state of the vehicle.

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：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：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.