公开(公告)号：US20240159208A1

公开(公告)日：2024-05-16

申请号：US18280490

申请日：2022-02-02

Applicant: Hitachi Astemo, Ltd.

Inventor： Takafumi ITO ,  Kiyotaka OGURA ,  Masashi NEMOTO ,  Kenichiro TOKUO

IPC: F02M59/36 ,  F02M59/44

CPC classification number: F02M59/366 ,  F02M59/44

Abstract: The present invention suppresses wear of a rod or a component with which the rod is in contact. An electromagnetic suction valve mechanism (electromagnetic valve mechanism) includes a suction valve (valve body), a rod engaged with the suction valve, and a magnetic attraction force generation unit that generates a magnetic attraction force for moving the rod in an axial direction. The rod is provided with a low friction portion. The low friction portion is set to a friction coefficient such that a frictional force generated between the rod and the rod contact component with which the rod is in contact is smaller than a rotational propulsive force of the rod.

公开(公告)号：US11984822B2

公开(公告)日：2024-05-14

申请号：US17784334

申请日：2020-11-27

Applicant: Hitachi Astemo, Ltd.

Inventor： Tomohiko Yano ,  Shinichirou Wada

IPC: H02M7/539 ,  G01R19/32 ,  H02M1/00 ,  H02M1/32 ,  H02M7/5387 ,  H02M7/5395 ,  H03K17/687

CPC classification number: H02M7/5395 ,  G01R19/32 ,  H02M1/0009 ,  H02M1/0048 ,  H02M1/327 ,  H02M7/53871 ,  H03K17/687

Abstract: A power conversion apparatus accurately estimates a main current of a power device using observation of a sense current. The power conversion apparatus includes: an inverter circuit including a device having a main element and a sense element; a temporary-main-current estimator estimates a current flowing through the main element, from a sense current flowing through the sense element, as a temporary main current; a temperature-difference estimator configured to estimate a temperature difference between the main element and the sense element based on a gate drive signal for the main element and the temporary main current; a main-current corrector corrects the temporary main current using the estimated temperature difference and a temperature characteristic of on-resistance of the main element and output the corrected temporary main current as a corrected main current; and an inverter control circuit configured to output the gate drive signal based on the corrected main current.

公开(公告)号：US11984821B2

公开(公告)日：2024-05-14

申请号：US17761444

申请日：2020-07-31

Applicant: Hitachi Astemo, Ltd.

Inventor： Toshiyuki Ajima ,  Takafumi Hara ,  Akihiro Ashida ,  Hirokazu Matsui

IPC: H02M7/53 ,  B60L15/08 ,  H02M1/12 ,  H02M7/5395 ,  H02P27/08 ,  H02P29/40

CPC classification number: H02M7/5395 ,  B60L15/08 ,  H02M1/12 ,  H02P27/08 ,  H02P29/40 ,  B60L2210/40

Abstract: An inverter control device 200 includes a current control unit 210 that outputs a voltage commands (Vd*, Vq*), a modulation wave control unit 220 that generates a modulation wave based on the voltage commands (Vd*, Vq*), a pulse generation unit 230 that generates a PWM pulse for controlling an inverter 100 using a modulation wave and a carrier wave of a predetermined frequency, and a pulse shift unit 250 that corrects the phase of the PWM pulse such that the PWM pulse is output in a phase corresponding to a harmonic of a predetermined order of the modulation wave in the near-zero-cross region including the zero-cross point at which the modulation wave changes across 0.

公开(公告)号：US20240152353A1

公开(公告)日：2024-05-09

申请号：US18548985

申请日：2022-03-01

Applicant: HITACHI ASTEMO, LTD.

Inventor： Wataru IBA ,  Shuhei KANEKO ,  Mikio KATAOKA

IPC: G06F8/65

CPC classification number: G06F8/65 ,  B60R16/02

Abstract: An object of the present invention is to minimize a likelihood of the vehicle becoming in an inoperable state even in an event of a program update failure. An in-vehicle device 6 includes: a program storage unit 64 that stores a program; an activation processing unit 65 that activates the program; and an update processing unit 63 that receives an update program 21 and an update reason 22 of the program and updates the program with the update program 21. In a case where the update of the program has failed, the activation processing unit 65 activates the program in an activation mode corresponding to the update reason 22.

公开(公告)号：US20240151273A1

公开(公告)日：2024-05-09

申请号：US18549241

申请日：2021-12-16

Applicant: Hitachi Astemo, Ltd.

Inventor： Shoichi ICHIKAWA ,  Daiki TSUTSUMI ,  Toshiyuki MASUDA ,  Kenichiro ISHIKURA

IPC: F16D3/06 ,  B60K17/22 ,  F16D3/38

CPC classification number: F16D3/06 ,  F16D3/387 ,  B60K17/22 ,  F16D2300/08

Abstract: As a stopper for restricting movement of a rotary shaft 31 of a transmission device 3 and a shaft part 41 of a first drive-side joint member J11 in a direction of approaching each other, a stopper part 5 is formed separately from the shaft part 41 and a yoke body part 42 of the first drive-side joint member so that the stopper function of the first drive-side joint member J11 is guaranteed by the separately-formed stopper part 5 in the present invention. With this configuration, a change in the gravity center position of the first drive-side joint member caused due to build-up processing on the shaft part or the yoke body part is suppressed. It is possible to restrict relative movement of the first drive-side joint member and the rotary shaft while ensuring adequate machining for formation of a shaft-part-side seal surface on the first drive-side joint member.

公开(公告)号：US20240151189A1

公开(公告)日：2024-05-09

申请号：US18281996

申请日：2022-01-25

Applicant: Hitachi Astemo, Ltd.

Inventor： Fumihiro ITABA ,  Osamu MUKAIHARA

IPC: F02D41/20 ,  F02D41/30 ,  F02M51/06

CPC classification number: F02D41/20 ,  F02D41/30 ,  F02M51/061

Abstract: An object of the present invention is to provide a fuel injection control device capable of improving the execution frequency and accuracy of individual difference detection of a plurality of fuel injection valves. Therefore, the fuel injection control device 127 is configured to measure, as a valve closing time, a time from when energization of the solenoid 407 is finished to when the valve body 402 moves to the valve closing position for each of the plurality of fuel injection valves 105; divide an energization time of the solenoid 407 into a plurality of sections 1001 to 1004; calculate, as an average valve closing time, an average value of the valve closing times measured a plurality of times, in each of the plurality of sections 1001 to 1004; calculate a specific valve closing time based on the average valve closing time of at least one section among the plurality of sections 1001 to 1004; and correct the energization time according to the specific valve closing time of each of the plurality of fuel injection valves 105.

公开(公告)号：US20240151187A1

公开(公告)日：2024-05-09

申请号：US18281240

申请日：2022-02-21

Applicant: Hitachi Astemo, Ltd.

Inventor： Yuya SHINOZAKl ,  Akira KIYOMURA

IPC: F02D15/02 ,  F02D41/22

CPC classification number: F02D15/02 ,  F02D41/221 ,  F02D2700/03

Abstract: A control device for a variable compression ratio mechanism for changing a compression ratio of an internal combustion engine by rotating a control shaft connected to an output shaft of an actuator, wherein with respect to a reference position, the control device determines the rotation angle of the control shaft by sequentially integrating the output values of an angle sensor that detects the rotation angle of the output shaft of the actuator in a range of 0° to 360° such that the rotation angle approaches a target angle. When the internal combustion engine is stopped, the control device rotates the control shaft to a high-compression-ratio side and a low-compression-ratio side, respectively, toward a stopper mechanism that defines the rotatable range and compares the determined rotation angle and a reference operation angle to diagnose whether a failure has occurred in the variable compression ratio mechanism.

公开(公告)号：US11978345B2

公开(公告)日：2024-05-07

申请号：US17284150

申请日：2019-10-11

Applicant: HITACHI ASTEMO, LTD.

Inventor： Masayoshi Ishikawa ,  Hideaki Suzuki ,  Hidehiro Toyoda

IPC: G08G1/16 ,  B60W60/00 ,  G06N3/04 ,  G06N3/08 ,  G06T7/246 ,  G06T7/73

CPC classification number: G08G1/166 ,  B60W60/001 ,  G06N3/04 ,  G06N3/08 ,  G06T7/246 ,  G06T7/73 ,  G06T2207/20081 ,  G06T2207/20084 ,  G06T2207/30236

Abstract: A moving object behavior prediction device improves prediction accuracy and includes: an input map generation unit that generates a single input map in which a region capable of containing a plurality of the moving objects is divided into a plurality of cells, in which each of the cells stores related information of a static object and related information of the moving object; a movement amount estimation unit that estimates a movement amount as a feature amount of each cell from the input map, using a trained convolutional neural network; a movement amount acquisition unit that acquires a movement amount at a current position of the moving object from a movement amount stored in a peripheral cell the moving object; and a future position prediction unit that predicts a future position of the moving object based on a feature amount at a current position of the moving object.

公开(公告)号：US20240141964A1

公开(公告)日：2024-05-02

申请号：US18278952

申请日：2022-02-28

Applicant: Hitachi Astemo, Ltd.

Inventor： Atsushi ODAIRA ,  Haruhiko FUJITA

IPC: F16D65/18

CPC classification number: F16D65/18 ,  F16D2121/24

Abstract: An electric brake apparatus includes a control unit connected to an electric motor, a first connector portion connected to the control unit and used for power feeding and input of one of redundant signals, a second connector portion connected to the control unit and used for power feeding and input of another of the redundant signals, and a third connector connected to the control unit and used for input of a signal related to a wheel speed. This allows providing redundancy for control associated with power feeding and rotation of the electric motor and also reducing noise in the input signal of the wheel speed.

公开(公告)号：US11970152B2

公开(公告)日：2024-04-30

申请号：US17298809

申请日：2019-11-25

Applicant: Hitachi Astemo, Ltd.

Inventor： Koki Takimoto ,  Shu Kato

IPC: B60T8/32 ,  B60T7/04 ,  B60T13/62 ,  B60T13/68 ,  B60T17/22 ,  G01D5/14 ,  G01L5/22 ,  G05G1/38 ,  G05G25/00

CPC classification number: B60T8/326 ,  B60T13/62 ,  B60T13/686 ,  B60T17/22 ,  G01D5/142 ,  G01L5/225 ,  G05G1/38 ,  G05G25/00 ,  B60T7/042 ,  B60T2220/04 ,  B60T2270/402 ,  B60T2270/404 ,  B60T2270/82

Abstract: A vehicle pedal stroke detection apparatus acquires a first value based on a physical amount regarding a magnetic flux of a magnet that is output from a stroke sensor. The first value is a physical amount regarding a magnitude of a magnetic flux density of the magnet with respect to a displacement of a push rod. Then, the vehicle pedal stroke detection apparatus compares the first value and a second value. The second value is a preset physical amount regarding the magnitude of the magnetic flux density of the magnet with respect to the displacement of the push rod.