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公开(公告)号：US12252210B2
公开(公告)日：2025-03-18
申请号：US17406668
申请日：2021-08-19
Applicant: Hitachi Astemo, Ltd.
Inventor： Tsubasa Kimura
Abstract: A shock absorber includes a tubular outer tube, a tubular inner tube, a rod, a piston, an urging member, and a guide bush. The guide bush is a ring-shaped member arranged along an inner periphery of the outer tube, abuts against a front surface and a rear surface of the inner tube to movably hold the inner tube, and is separated from left and right side surfaces of the inner tube.
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公开(公告)号：US12249943B2
公开(公告)日：2025-03-11
申请号：US17540595
申请日：2021-12-02
Applicant: Hitachi Astemo, Ltd.
Inventor： Yuta Nakamura , Masatoshi Goto , Yoshinori Sagiya , Kazunari Kurokawa , Shugo Ueno , Shintaro Tai
IPC: H02P27/06 , H02M1/32 , H02P29/024 , H02P29/028 , H02P29/68
Abstract: A control device that does not require arithmetic processing of a phase current can be provided. A control device in which a plurality of switching legs including a pair of semiconductor switching elements constituting an upper arm and a lower arm are provided in a number corresponding to the number of phases of a motor that is a load includes a switch short circuit detection unit configured to detect a short circuit failure of the semiconductor switching element, and a control unit configured to execute determination processing of determining whether the short circuit failure has occurred in the upper arm or the lower arm on the basis of a result of detection by the switch short circuit detection unit, and to set all the semiconductor switching elements that constitute an arm in which a short circuit failure has occurred on the basis of a result of the determination processing.
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公开(公告)号：US20250079971A1
公开(公告)日：2025-03-06
申请号：US18726611
申请日：2022-02-07
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takeshi IKUYAMA , Koichi YAHATA
IPC: H02M1/084 , H02M1/088 , H02M1/32 , H02M7/5387 , H02M7/5395
Abstract: In a gate drive circuit, a first and second gate drives IC includes an INA terminal and an INB terminal to which a PWM signal is input, a gate output terminal that outputs a gate drive signal, and an OSFB terminal that outputs a feedback signal of the gate drive signal, and they are configured to output a gate drive signal in an ON state when the input of the INA terminal and the INB terminal is (ON, OFF). In the first gate drive IC, a first PWM signal is input to the INA terminal, and a second PWM signal is input to the INB terminal, and in the second gate drive IC, the second PWM signal is input to the INA terminal, and the first PWM signal is input to the INB terminal. The first diode includes a cathode side connected to the INB terminal of the second gate drive IC and an anode side connected to the OSFB terminal of the first gate drive IC. The second diode includes a cathode side connected to the INB terminal of the first gate drive IC and an anode side connected to the OSFB terminal of the second gate drive IC.
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公开(公告)号：US12245384B2
公开(公告)日：2025-03-04
申请号：US17622174
申请日：2020-05-13
Applicant: HITACHI ASTEMO, LTD.
Inventor： Yuki Nakamura , Masahiro Toyama , Isao Hoda , Hiroki Funato , Umberto Paoletti , Hideyuki Sakamoto , Yutaka Uematsu
Abstract: A signal transmission circuit includes: a circuit board stored in a housing; a connector which is mounted on the circuit board and includes a first signal terminal and a first ground terminal; and an integrated circuit which is mounted on the circuit board and includes a second signal terminal and a second ground terminal. The first signal terminal and the second signal terminal are connected to each other by a signal wiring arranged on the circuit board. The first around terminal and the second ground terminal are connected to each other by a ground wiring arranged in a predetermined range including a portion immediately above or immediately below the signal wiring in the circuit board. At least a part of the ground wiring immediately above or immediately below the signal wiring has a high impedance structure formed to be wider than the signal wiring and narrower than a combined width of the first signal terminal and the first ground terminal.
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公开(公告)号：US20250070642A1
公开(公告)日：2025-02-27
申请号：US18719158
申请日：2021-12-14
Applicant: Hitachi Astemo, Ltd.
Inventor： Yoshiaki MIZUHASHI , Masahiro DOI , Mitsuhiro IWASAKI
Abstract: In a drive circuit of a voltage-driven power semiconductor switching element, a drive circuit capable of performing efficient switching control according to a drive condition with a relatively simple configuration is provided. The drive circuit includes the voltage-driven switching element, an on-circuit that injects a charge into a gate of the voltage-driven switching element in response to a drive signal, and an off-circuit that extracts the charge from the gate of the voltage-driven switching element in response to a drive signal. In the drive circuit, the injection of the charge into the gate of the voltage-driven switching element or the extraction of the charge from the gate by pulse driving of the on-circuit or the off-circuit, and switching time of the voltage-driven switching element is controlled.
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Patent Agency Ranking
376.发明申请公开(公告)号：US20250065946A1
公开(公告)日：2025-02-27
申请号：US18724844
申请日：2023-02-24
Applicant: Hitachi Astemo, Ltd.
Inventor： Hiroko UEDA , Kazuya TERASHIMA
Abstract: A steering operation control apparatus and steering operation control method capable of suppressing an unintended rotation of a steering wheel with a simple configuration. The steering operation control apparatus includes a steering control portion configured to control a steering actuator configured to operate a steering mechanism configured to drive a steering target wheel, and a reaction force control portion coupled with a steering wheel and configured to control a reaction force actuator configured to provide a reaction force. The reaction force control portion has a function of outputting a stop position maintaining signal required for the reaction force actuator to maintain a present position of the steering wheel to the reaction force actuator when a driver is detected to get out of or get into a vehicle. This aspect just feeds the stop position maintaining signal for maintaining the present position of the steering wheel to the reaction force actuator.
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377.发明授权公开(公告)号：US12233966B2
公开(公告)日：2025-02-25
申请号：US18152491
申请日：2023-01-10
Applicant: Hitachi Astemo, Ltd.
Inventor： Kyoichi Tagami
IPC: B62D5/04 , B60W40/076 , B62D5/22 , B62D6/04
Abstract: An electric power steering device 100 includes: an electric motor 110 configured to apply a driving force to steer a wheel in response to operation of a steering wheel; and a control device 10 configured to perform control of drive of the electric motor by estimating a degree of sloping in a transverse direction of a roadway on which a vehicle travels, determining, based on the estimated degree of sloping, a correction current for correcting a target current required for the electric motor to generate the driving force, and correcting the target current with the correction current.
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公开(公告)号：US12228103B2
公开(公告)日：2025-02-18
申请号：US18562524
申请日：2022-02-15
Applicant: Hitachi Astemo, Ltd.
Inventor： Hayato Takei , Shinya Sato , Akihiro Komori
Abstract: An internal combustion engine control device includes: a rotation speed calculating unit that calculates crank rotation speeds of an engine; an extreme timing calculating unit that calculates an extreme timing of the crank rotation speeds; and an average rotation speed calculating unit that calculates an average rotation speed of the crank rotation speeds; and a combustion state estimating unit that estimates a combustion state in the engine based on the extreme timing and the average rotation speed.
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公开(公告)号：US20250052293A1
公开(公告)日：2025-02-13
申请号：US18799607
申请日：2024-08-09
Applicant: Hitachi Astemo, Ltd. , HONDA MOTOR CO., LTD.
Inventor： Takahiro MASUDA , Ryo SAKAKIBARA , Masaki TAKENAKA , Tomoaki KUBOTA
Abstract: An elastic support member interposed between a coil spring and a spring support member supporting an end of the coil spring includes a protrusion protruding from an opposing surface of the elastic support member facing the spring support member and configured to be inserted into a through-hole of the spring support member. The protrusion includes: a base sized, in a direction parallel to the opposing surface, to be smaller than the through-hole and configured to be fitted in the through-hole; and a lug protruding outward from an outer periphery of the base and located opposite the opposing surface with respect to the spring support member when the base is fitted in the through-hole. The lug includes a recess between it and the base depressed away from the opposing surface.
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公开(公告)号：US12224685B2
公开(公告)日：2025-02-11
申请号：US17924633
申请日：2021-01-29
Applicant: HITACHI ASTEMO, LTD.
Inventor： Naoki Shinohara , Keisuke Suzuki
Abstract: Provided is a motor control device that can reduce an error component resulting from braking or the like to bring an estimated motor speed closer to an actual motor speed, thereby improving the accuracy of control of a motor. The motor control device includes a controller 6 that outputs a first torque instruction signal that is an instruction to specify a torque of an electric motor 1, and a damping control unit 500. The damping control unit 500 includes a first high-pass filter 50f that receives input of a motor speed signal indicating a speed of the electric motor 1, the first high-pass filter 50f outputting a first signal, a second high-pass filter 50d that receives input of an estimated motor speed signal obtained from the first torque instruction signal, the second high-pass filter 50d outputting a second signal, and a low-pass filter 50g that receives input of a motor speed deviation signal indicating a deviation between the first signal and the second signal, the low-pass filter 50g obtaining a low-frequency component from the motor speed deviation signal and outputting the low-frequency component as a third signal.
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