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公开(公告)号：US12222406B2
公开(公告)日：2025-02-11
申请号：US18011461
申请日：2021-02-05
Applicant: Hitachi Astemo, Ltd.
Inventor： Yasuo Shima , Keishi Komoriyama , Yoichiro Kobayashi
IPC: G01R31/54
Abstract: Poor opening is detected with certainty and reliability with respect to a ground line of an integrated circuit device regardless of the connection state of a load and the operating state of a drive circuit. In an integrated circuit device 10, a drive circuit 30 switches between conduction and interruption of a load current using switch elements 40 and 45. The ground line 31 is grounded via the GND terminal 32 to the common ground provided outside the integrated circuit device 10 and is connected to the drive circuit 30. The ground line 21 is grounded to the common ground via the GND terminal 22 and is connected to the control circuit 20. The diagnostic current supply circuit 90 supplies a predetermined diagnostic current to the ground line 31. The rectifying elements 61 and 62 are connected between the ground line 21 and the ground line 31. The diagnostic circuit 70 measures the potential difference between the ground line 31 and the ground line 21 and compares the potential difference with the predetermined comparison voltage 73 to diagnose the grounding state of the ground line 31.
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公开(公告)号：US20250042295A1
公开(公告)日：2025-02-06
申请号：US18716244
申请日：2022-07-14
Applicant: HITACHI ASTEMO, LTD.
Inventor： Masahiro KAGEYAMA , Yoshimi NOGUCHI , Mutsumi KIKUCHI , Takanori YAMAZOE
Abstract: A battery data transmission device detects the states of a plurality of battery cells, and transmits, via a transmission path, battery data that is data regarding the detected plurality of battery cells. The device includes an encoding unit that has a plurality of encoding modes and encodes the battery data into encoded data, a mode selection unit that selects any one encoding mode from the plurality of encoding modes, and a transmission control unit that transmits, to a battery management device, the encoded data in the encoding mode selected by the mode selection unit, and receives, from the battery management device, reception information on the transmitted data. The mode selection unit selects, when the previous transmission data communication is abnormal according to the reception information from the battery management device, as the encoding mode for the transmission for this time, the encoding mode in which the past battery data is not used in decoding.
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公开(公告)号：US12215754B2
公开(公告)日：2025-02-04
申请号：US17798419
申请日：2021-02-09
Applicant: Hitachi Astemo, Ltd.
Inventor： Kosuke Kadokura
Abstract: A pin portion in which an introduction orifice leading to a back-pressure chamber is formed is disposed along inner peripheries of a main body, a main valve, and a pilot casing. A nut disposed on the pin portion is rotated relative to the pin portion to fasten the main body, the main valve, and the pilot casing together. This eliminates the necessity of machining a tool engagement portion in the pin portion and represses an increase in man-hours.
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公开(公告)号：US12212203B2
公开(公告)日：2025-01-28
申请号：US17790366
申请日：2020-12-11
Applicant: Hitachi Astemo, Ltd.
Inventor： Hiromitsu Okamoto , Yoshio Ozeki , Kenichi Nakayama , Satoshi Yamamura , Zhi Jing
Abstract: Reliability of a rotating electrical machine is enhanced. A stator of a rotating electrical machine includes: a stator core being provided with teeth and slots on a cylindrical inner side surface of the stator core; a plurality of winding wires being each arranged inside each of the slots; and slot liners being each arranged respectively between an inner wall of each of the slots and each of the plurality of winding wires, each of the slot liners has a sheet-like first insulating substrate, a second insulating material layer being disposed on at least one surface of each of the slot liners, and an adhesive layer which expands between the first insulating substrate and the second insulating material layer by processing, the second insulating material layer is provided with a through-hole which communicates a side of the first insulating substrate with the inner wall of each of the slots, and each of the slot liners is disposed inside each of the slots in such a way that the second insulating material layer is provided on a side closer to the inner wall of each of the slots than the first insulating substrate.
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公开(公告)号：US20250027460A1
公开(公告)日：2025-01-23
申请号：US18711914
申请日：2021-11-22
Applicant: Hitachi Astemo, Ltd.
Inventor： Ryutaro KOIWAI , Osamu MUKAIHARA
IPC: F02D45/00
Abstract: A processor (CPU 40e) of a control device (ECU 0) for an internal combustion engine identifies a first throttle valve opening degree θA and a second throttle valve opening degree θB at which a change rate (differential value) of an index (a deposit thickness, a decrease rate of an effective opening area, a flow rate decrease rate, and the like) correlated with a decrease rate of an effective opening area of a throttle valve changes (s109). The processor (CPU 40e) estimates an index at any throttle valve opening degree from the first throttle valve opening degree θA and the second throttle valve opening degree θB (s110), and calculates an effective opening area of the throttle valve from the estimated index (s112).
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Patent Agency Ranking
公开(公告)号：US12203533B2
公开(公告)日：2025-01-21
申请号：US18026203
申请日：2021-10-06
Applicant: Hitachi Astemo, Ltd.
Inventor： Koji Usui
Abstract: An electric actuator including: an electric motor capable of rotating forward and backward; and a motion conversion mechanism configured to convert rotation of the electric motor into reciprocating linear motion of a screw shaft. The motion conversion mechanism including: a nut configured to be rotationally driven by the electric motor; and the screw shaft capable of being threadedly inserted through the nut. A lubricant holding portion having an outer diameter larger than a diameter of a screw hole of the nut and being capable of housing lubricant is formed on an inner periphery of an end of the nut in an axial direction. A lid member configured to cover an opening end of the lubricant holding portion in an axial direction is provided. Thus, an electric actuator can prevent wear at a threaded engagement portion between a nut and a screw shaft by sufficiently lubricating the threaded engagement portion.
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公开(公告)号：US12202468B2
公开(公告)日：2025-01-21
申请号：US17837296
申请日：2022-06-10
Applicant: Hitachi Astemo, Ltd.
Inventor： Ken Isshiki , Kyoichi Tagami
IPC: B60W10/20 , B60W10/22 , B60W30/045
Abstract: A steering control device which calculates a steering control amount for controlling steering of a vehicle includes a basic control amount calculation unit which calculate a basic control amount, and a steering control amount arithmetic unit which calculates the steering control amount with reference to self-aligning torque caused by a motion state amount of the vehicle and the basic control amount.
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公开(公告)号：US12199546B2
公开(公告)日：2025-01-14
申请号：US18012401
申请日：2021-06-10
Applicant: Hitachi Astemo, Ltd.
Inventor： Junki Isobe , Kohei Myoen
Abstract: A motor control device controls a motor, which is driven by three-phase alternating currents and to which a magnetic pole position sensor measuring a magnetic pole position of a rotor is attached, using a detection value of a rotation angle of the motor based on a measurement result of the magnetic pole position by the magnetic pole position sensor, compares a peak-current-time rotation angle representing the detection value of the rotation angle at a peak of a current value of a target phase and a reference rotation angle representing the rotation angle at a peak of a predetermined current waveform of the target phase using any one phase of the three-phase alternating currents during a three-phase short circuit of the motor as the target phase, and corrects the detection value of the rotation angle based on a result of the comparison.
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公开(公告)号：US12199539B2
公开(公告)日：2025-01-14
申请号：US17916707
申请日：2021-01-22
Applicant: Hitachi Astemo, Ltd.
Inventor： Katsuhiro Hoshino , Takafumi Hara , Takaya Tsukagoshi
Abstract: An object of the present invention is to sufficiently suppress a vibration and noise generated in a motor. A motor control device includes a first inverter circuit and a second inverter circuit of a redundant system, the first inverter circuit and the second inverter circuit controlling a motor, and a control unit that controls the first inverter circuit and the second inverter circuit. The first inverter circuit converts the DC power into the AC power based on a PWM signal generated by using a first carrier signal. The second inverter circuit converts the DC power into the AC power based on a PWM signal generated by using a second carrier signal. The control unit shifts phases of the first carrier signal and the second carrier signal by using, as a reference, pulsation of an electromagnetic force caused by a magnetic circuit of the motor.
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公开(公告)号：US12199497B2
公开(公告)日：2025-01-14
申请号：US17637499
申请日：2020-09-11
Applicant: Hitachi Astemo, Ltd.
Inventor： Kazunari Kurokawa , Tao Trong Bui
Abstract: A gate driving power source device individually supplies a DC power source to a plurality of gate drive circuits provided for a power conversion device. The power conversion device includes a step-up/down converter and one or a plurality of AC/DC conversion circuits. The step-up/down converter includes a step-up/down upper arm switching element and a step-up/down lower arm switching element. The AC/DC conversion circuit includes an AC/DC upper arm switching element and an AC/DC lower arm switching element. The gate driving power source device includes a power source unit that supplies a shared DC power source to at least two of the step-up/down upper arm switching element, the step-up/down lower arm switching element, the AC/DC upper arm switching element, and the AC/DC lower arm switching element.
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