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公开(公告)号：US12233963B2
公开(公告)日：2025-02-25
申请号：US17636172
申请日：2020-06-05
Applicant: HITACHI ASTEMO, LTD.
Inventor： Masatoshi Enomoto
Abstract: Provided is a steering device including a lock nut that fixes an outer race of a turning nut threadably engaged with a rack bar. A loosening prevention protruding portion formed on a lock nut main body is brought into contact with a radial-direction abutting portion to prevent loosening of the lock nut with a frictional force. At the same time, a lock nut recessed portion for reducing mechanical stiffness is formed in an outer peripheral surface of the loosening prevention protruding portion so that an external force acting from the outer race is buffered by the lock nut recessed portion. In this manner, a decrease in contact area between the loosening prevention protruding portion and the radial-direction abutting portion is reduced.
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公开(公告)号：US12231009B2
公开(公告)日：2025-02-18
申请号：US17798777
申请日：2021-01-15
Applicant: Hitachi Astemo, Ltd.
Inventor： Yukiko Kawano , Hiroshi Horie , Hiroshi Hamano , Hideaki Noto , Shunsuke Isogai , Chihiro Oinuma , Hirona Tanaka
Abstract: To prevent varnish from adhering to an adhesion prohibited area while satisfying required performance for varnish. A method for manufacturing a stator of a rotating electric machine in which a coil is wound around a stator core, the method includes: a first varnish process of forming a first varnish portion by dropping varnish at a coil disposed on an outermost circumference or an innermost circumference of a coil end portion where the coil protrudes from the stator core and positioned close to the stator core; and a second varnish process of forming a second varnish portion to provide a non-existence region where varnish is not applied between the first varnish portion and the second varnish portion by dropping varnish at a position farther from the stator core than a position in the first varnish process.
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公开(公告)号：US20250052908A1
公开(公告)日：2025-02-13
申请号：US18721183
申请日：2021-12-24
Applicant: Hitachi Astemo, Ltd.
Inventor： Toru KATO
Abstract: An in-vehicle electronic control unit includes: a positioning calculation unit that acquires GNSS information and acquires positioning information of an own vehicle; a vehicle movement detection unit that detects movement of the own vehicle; and an own vehicle movement determination unit that estimates movement while a vehicle system is stopped, in which the own vehicle movement determination unit determines whether the own vehicle has moved while the vehicle system is stopped, and based on a determination result as to whether the own vehicle has moved, determines whether the positioning calculation unit estimates a current position of the own vehicle by using a position of the own vehicle when the vehicle system is stopped.
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公开(公告)号：US12225671B2
公开(公告)日：2025-02-11
申请号：US17642872
申请日：2020-08-14
Applicant: Hitachi Astemo, Ltd.
Inventor： Tomohiro Fukuda
Abstract: An electronic control unit includes a connector, a first board, and a second board. The first board includes an inner-layer conductor. The second board includes an inner-layer conductor and provided with a control circuit. A thickness of the inner-layer conductor of the first board is thicker than a thickness of the inner-layer conductor of the second board. The thickness of the inner-layer conductor of the first board is 1.7 to 2.3 times the thickness of the inner-layer conductor of the second board.
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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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Patent Agency Ranking
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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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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