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公开(公告)号：US12155277B2
公开(公告)日：2024-11-26
申请号：US17624130
申请日：2020-06-29
Applicant: HONDA MOTOR CO., LTD. , HITACHI ASTEMO, LTD.
Inventor： Heisuke Kobayashi , Takeshi Hoshinoya , Keiichiro Kashiwabara , Norifumi Yasuda , Manabu Yazaki , Tomoyuki Suzuki , Akira Fujiwara , Hideaki Noto , Shunsuke Isogai , Yu Asakura
Abstract: A driving unit includes a rotary electric machine which has a rotation axis extending in a horizontal direction, a rotary electric machine case, and an electric power conversion device. The electric power conversion device is disposed on one side of the rotary electric machine in an orthogonal direction. A first coolant is stored in a rotary electric machine accommodating portion of the rotary electric machine case. The driving unit has a first connecting portion electrically connecting the rotary electric machine and the electric power conversion device and a second connecting portion electrically connecting a sensor provided to the rotary electric machine and the electric power conversion device. The first connecting portion and the second connecting portion are disposed between the rotary electric machine and the electric power conversion device in the orthogonal direction.
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公开(公告)号：US12152656B2
公开(公告)日：2024-11-26
申请号：US18037165
申请日：2021-11-12
Applicant: Hitachi Astemo, Ltd.
Inventor： Koji Usui , Ryo Ueyama , Takenori Iso , Hiromu Narukawa
Abstract: An electric actuator includes an electric motor, a nut, and a screw shaft threadedly inserted through the nut so as to be able to advance and retreat. The threads of the screw shaft include two flanks and a crest portion connecting the two flanks to each other. Grease is used as a lubricant. A groove portion, which is cut out from the crest portion toward a root portion side of the threads and holds grease, is formed on the threads of the screw shaft. Further, a tapered surface is formed at a groove portion side end of at least one of the two flanks, and the tapered surface inclines in a direction away from the groove portion and drags the grease held in the groove portion onto a threadedly engaged portion with the aid of the wedge effect. As a result, the electric actuator can promote lubrication.
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公开(公告)号：US12151533B2
公开(公告)日：2024-11-26
申请号：US17424961
申请日：2020-02-14
Applicant: Hitachi Astemo, Ltd.
Inventor： Riichi Nagao , Koichi Yamaka , Yoshihiro Yamaguchi
Abstract: The present invention provides a shock absorber serving as a cylinder device capable of securing a clearance between an outer tube and a peripheral member and improving bending rigidity of the outer tube. An outer tube 104 housing an inner tube 103 is provided with a pair of knuckle bracket fastening plates 110a and 110b protruding in one direction from an outer surface of the outer tube 104. The pair of knuckle bracket fastening plates 10a and 110b has wide surfaces facing each other, and the wide surfaces are provided along an axial direction of the outer tube 104. When the inside of a vehicle is defined as a virtual region I 192 and the outside of the vehicle is defined as a virtual region II 193 with a virtual line 191, which passes through a stroke center line 71 and matches the inside and outside of the vehicle, as a boundary in an orthogonal cross section at an arbitrary axial position of the outer tube 104 orthogonal to the stroke center line 71 of a piston rod 102, a cross-sectional area Ai1 of the outer tube 104 in the virtual region I 192 is made larger than a cross-sectional area Ao1 of the outer tube 104 in the virtual region II 193.
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公开(公告)号：US20240381535A1
公开(公告)日：2024-11-14
申请号：US18690971
申请日：2022-08-01
Applicant: HITACHI ASTEMO, LTD.
Inventor： Fumiya IIJIMA
Abstract: A bendable circuit substrate (3) is provided with a first rigid part (11), a second rigid part (12) and a flexible part (13). The first rigid part (11) is provided with power source terminals (40) (positive electrode terminal (40A), negative electrode terminal (40B)), and power is supplied to the second rigid part (12) via power source positive electrode wirings (BA) of the flexible part (13). The power source positive electrode wirings (BA) are provided to the respective first layer and the second layer so as to be superimposed on each other in the lamination direction, in the flexible part (13).
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公开(公告)号：US20240380337A1
公开(公告)日：2024-11-14
申请号：US18686225
申请日：2022-03-04
Applicant: Hitachi Astemo, Ltd.
Inventor： Takafumi HARA , Takaya TSUKAGOSHI , Katsuhiro HOSHINO , Shigehisa AOYAGI
IPC: H02M7/5395 , H02M1/15 , H02P27/08
Abstract: An inverter control device includes: a carrier wave generation unit that generates a carrier wave; a carrier frequency adjustment unit that adjusts a frequency of the carrier wave; and a PWM control unit that performs pulse width modulation on a voltage command using the carrier wave and generates a PWM pulse signal for controlling an operation of an inverter. The carrier frequency adjustment unit determines a phase shift amount for reducing a voltage amplitude of a specific order component among order components of a voltage ripple superimposed on a DC voltage, and adjusts a frequency of the carrier wave so as to change a phase difference between the voltage command and the carrier wave according to the determined phase shift amount.
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Patent Agency Ranking
公开(公告)号：US20240375170A1
公开(公告)日：2024-11-14
申请号：US18690433
申请日：2022-07-07
Applicant: HITACHI ASTEMO, LTD.
Inventor： Shinichi YAMANAKA , Daisuke HAMANAKA , Norihiro KIMURA , Keisuke KITAMURA
Abstract: In a rack bar and a steering device using the same, an endmost tooth bottom for reducing a stress exerted on a first forging die during die forging of a rack tooth molding part is formed on the endmost side of a plurality of tooth bottoms. Specifically, the endmost tooth bottom is formed so that a depth thereof is less than a depth of an ordinary tooth bottom by a difference. This reduces an amount of flow of a material of the rack bar during formation of the endmost tooth bottom by an amount commensurate with the difference. As a result, the stress exerted on the first forging die can be reduced, and occurrence of heat checking in the first forging die can be suppressed.
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公开(公告)号：US12140113B2
公开(公告)日：2024-11-12
申请号：US18280490
申请日：2022-02-02
Applicant: Hitachi Astemo, Ltd.
Inventor： Takafumi Ito , Kiyotaka Ogura , Masashi Nemoto , Kenichiro Tokuo
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.
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公开(公告)号：US12139208B2
公开(公告)日：2024-11-12
申请号：US17283475
申请日：2019-10-23
Applicant: HITACHI ASTEMO, LTD.
Inventor： Masao Fujimoto
Abstract: An electric power steering device includes a motor housing of an electric motor. The motor housing includes an end face part opposite to an output part of a rotating shaft of the electric motor. An electronic control part is arranged at the end face part. A connector assembly is arranged on a side of the electronic control part opposite to a side of the electronic control part that faces the end face part. A metal cover for the electronic control part includes a bottom part and a lateral peripheral part. The bottom part includes: an exposure hole through which an external terminal forming part is exposed to outside; and an annular reinforcing projecting portion formed at an edge of the exposure hole. The lateral peripheral part is angled from the bottom part, and forms an opening through which the lateral peripheral part is fixed to the end face part.
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公开(公告)号：US12139112B2
公开(公告)日：2024-11-12
申请号：US17439264
申请日：2020-05-26
Applicant: Hitachi Astemo, Ltd.
Inventor： Suguru Saotome , Norikazu Matsuzaki , Masayuki Kikawa
IPC: B60T13/14 , B60T7/12 , B60T8/17 , B60T8/1761 , B60T13/58 , B60T13/74 , B60T8/1755
Abstract: An ESC 33 increases distribution of a braking force to rear wheels according to a reduction in a speed of a vehicle due to braking, and distributes the braking force so as to allow the vehicle to be kept stopped due to braking forces applied to the rear wheels when the vehicle stopped. Then, a second ECU holds the braking force by driving a parking mechanism with the vehicle kept stopped due to the braking forces applied to the rear wheels.
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420.发明申请公开(公告)号：US20240372469A1
公开(公告)日：2024-11-07
申请号：US18285796
申请日：2022-02-16
Applicant: Hitachi Astemo, Ltd.
Inventor： Masato KITA , Yoichiro KOBAYASHI
Abstract: Provided are a highly reliable load drive circuit that includes a switching circuit that selects a power supply voltage, and is capable of seamlessly switching the power supply voltage without using a switch or a determination circuit, an electronic control device using the load drive circuit, and a control method for the electronic control device. The load drive circuit includes: a booster circuit that boosts an output from a power supply; and a voltage switching circuit that switches the output from the power supply and an output from the booster circuit, in which the voltage switching circuit includes a first MOSFET, a second MOSFET, and a gate voltage generation circuit that generates gate voltages of the first MOSFET and the second MOSFET, gate terminals of the first MOSFET and the second MOSFET are connected to the gate voltage generation circuit, source terminals of the first MOSFET and the second MOSFET are connected to the same node, a drain terminal of the first MOSFET is connected to an output terminal of the booster circuit, a drain terminal of the second MOSFET is connected to an output terminal of the power supply, and the output from the power supply and the output from the booster circuit are seamlessly switched according to an output voltage from the power supply.
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